JP5335526B2 - Buckling restraint brace - Google Patents

Buckling restraint brace Download PDF

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JP5335526B2
JP5335526B2 JP2009095496A JP2009095496A JP5335526B2 JP 5335526 B2 JP5335526 B2 JP 5335526B2 JP 2009095496 A JP2009095496 A JP 2009095496A JP 2009095496 A JP2009095496 A JP 2009095496A JP 5335526 B2 JP5335526 B2 JP 5335526B2
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divided
core material
connecting member
intermediate connecting
inner pipe
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JP2010242458A (en
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治克 角屋
亨 渡辺
俊二 藤井
浩 田川
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Nagoya University NUC
Tokai National Higher Education and Research System NUC
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Tokai National Higher Education and Research System NUC
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a buckling-restrained brace which prevents local buckling of a core material by properly maintaining positional relationships among the core material, a spacer and a pipe material so as to surely maintain a shrinkage margin of the core material, and which can exert high brace performance by suppressing the transmission of a compressive force to a stiffener. <P>SOLUTION: This buckling-restrained brace includes: a split core material 2 which is formed by splitting the core material in a length direction; an intermediate connecting member 3 for coupling and connecting the split core materials together; an inner pipe 6 outside which the plurality of spacers 10 arranged at spacings in the length direction are provided, and into which the split core materials are inserted and arranged on both the sides of the intermediate connecting member, respectively; an outer pipe 7 into which the intermediate connecting member and the inner pipe including the spacer are inserted, and to which the intermediate connecting member is fixed; and an inner pipe movement restriction means 14 which sets the shrinkage margin Q1 of the split core material, brought about by the compressive force, between the intermediate connecting member and the inner pipe, and which restricts the movement of the inner pipe, cause by the deformation of the split core material in the application of tension. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、芯材、スペーサー及び管材の位置関係を適切に維持して、芯材の縮み代を確実に保持することが可能であって、これにより芯材の局部的な座屈を防止し、また、補剛材への圧縮力の伝達を抑制可能として、高いブレース性能を発揮させることが可能な座屈拘束ブレースに関する。   The present invention can appropriately maintain the positional relationship of the core material, the spacer, and the tube material, and can reliably hold the shrinkage allowance of the core material, thereby preventing local buckling of the core material. The present invention also relates to a buckling-restrained brace capable of suppressing the transmission of compressive force to the stiffener and capable of exhibiting high brace performance.

木造建物や中低層鉄骨造建物では、地震等に対する負担荷重が比較的小さいことから、丸鋼などの比較的軸径の細い芯材を鋼製の管材で補剛するようにした座屈拘束ブレースが採用されている。この座屈拘束ブレースは、塑性化する芯材に丸鋼を用いることを特長としていて、軽量であってかつ施工性及び生産性に優れている。この種の座屈拘束ブレースとしては、特許文献１〜３が知られている。   In wooden buildings and medium- and low-rise steel buildings, the burden load against earthquakes is relatively small, so a buckling-restrained brace in which a core material with a relatively small shaft diameter such as round steel is stiffened with a steel pipe. Is adopted. This buckling-restrained brace is characterized by using round steel as a plasticizing core material, is lightweight, and has excellent workability and productivity. Patent Documents 1 to 3 are known as this type of buckling restraint brace.

特許文献１及び特許文献２では、芯材に丸鋼、座屈補剛材に鋼管、スペーサーに複数の金属製の押し出し成形体を用いて、芯材の局部的な座屈を防止している。５個のスペーサーの挿通孔に芯材を串刺し状態で挿通させて、各スペーサーのビス孔にビスをねじ込んで、ビスの先端部を芯材に押し付けることで、スペーサーを芯材に固定する。すなわち、各スペーサーの軸方向中央部を、芯材に固定する。なお、この固定は、ビス止めに限らず、接着やカシメ等によって行うようにしても良い。そして、このスペーサーを取り付けた芯材を補剛材内に挿入して、中央に位置するスペーサーのビス孔と補剛材のビス孔を互いに一致させて、これらビス孔にビスをねじ込んで、補剛材をスペーサーに固定する。すなわち、補剛材の軸方向中央部を、中央に位置するスペーサーの軸方向中央部に固定する。なお、この固定においても、ビス止めに限らず、接着やカシメ等によって行うようにしても良い。このようにして組み立てた座屈拘束ブレースでは、芯材の両端部が、両端に位置するスペーサーから突出しており、また各スペーサーが、軸方向にほぼ均等な隙間をあけて配置されている。そして、柱等の構造材のプレートに貫通させたボルトと、芯材の両端部のネジ部とを、ナットを介して連結することで、架構体の構造材間に架設される。架構体に組み込んだ座屈拘束ブレースにおいては、各スペーサー間の隙間も芯材の縮み代となることから、芯材の縮み代が分散された状態となっている。すなわち、芯材の縮み代は、芯材の両端部及び各スペーサー間の合計６箇所に分散される。   In Patent Document 1 and Patent Document 2, local buckling of the core material is prevented by using round steel for the core material, steel pipe for the buckling stiffener, and a plurality of metal extruded bodies for the spacer. . The spacer is fixed to the core material by inserting the core material into the insertion holes of the five spacers in a skewed state, screwing screws into the screw holes of each spacer, and pressing the tip of the screw against the core material. That is, the axial center part of each spacer is fixed to the core material. Note that this fixing is not limited to screwing, but may be performed by adhesion or caulking. Then, the core material to which the spacer is attached is inserted into the stiffener, the screw hole of the spacer located at the center and the screw hole of the stiffener are aligned with each other, and the screw is screwed into these screw holes to reinforce. Fix the rigid material to the spacer. That is, the axial center part of the stiffener is fixed to the axial center part of the spacer located at the center. Note that this fixing is not limited to screwing, but may be performed by adhesion or caulking. In the buckling restrained brace assembled in this way, both end portions of the core member protrude from the spacers located at both ends, and each spacer is disposed with a substantially uniform gap in the axial direction. And the bolt penetrated to the plate of structural materials, such as a pillar, and the thread part of the both ends of a core material are connected between the structural materials of a frame by connecting via a nut. In the buckling-restrained brace incorporated in the frame body, the gap between the spacers also becomes a shrinkage allowance for the core material, so that the shrinkage allowance for the core material is dispersed. That is, the shrinkage allowance of the core material is distributed at a total of six locations between both end portions of the core material and each spacer.

特許文献３も同様な座屈拘束ブレースを開示している。特許文献３では、座屈拘束ブレースの取付に関し、第１の固定材は、左側縦材の中央部に溶接された一対の垂直プレートと、これら垂直プレートの斜めに切りかかれた上端部間及び下端部間に跨って溶接された取付けプレートとから構成されている。そして、上側の取付けプレートには、その中央部から斜め下方に向かって延びて、下側の端部中央において開放するＵ字型の芯材挿通溝が形成され、下側の取付けプレートには、その中央部から斜め上方に向かって延びて、上側の端部中央において開放するＵ字型の芯材挿通溝が形成されている。これら取付けプレートの芯材挿通溝は、その開放部分すなわちプレート側方からの座屈拘束ブレースの芯材の差し入れを許容している。第２，第３の固定材は、右側縦材と上側、下側横材に跨って溶接された一対の垂直プレートと、第１の固定材の取付けプレートに対向するようにして、垂直プレートの斜めに切りかかれた上端部間或いは下端部間に跨って溶接された取付けプレートとから構成されている。そして、第２の固定材の取付けプレートには、その中央部から斜め下方に向かって延びて、下側の端部中央において開放するＵ字型の芯材挿通溝が形成されている。また、第３の固定材の取付けプレートにも、その中央部から斜め上方に向かって延びて、上側の端部中央において開放するＵ字型の芯材挿通溝が形成されている。これら取付けプレートの芯材挿通溝は、その開放部分すなわちプレート側方からの座屈拘束ブレースの芯材の差し入れを許容している。この取付けプレートへの芯材の取り付けに際しては、芯材の両端部に、予め固定具としてのダブルナット、単ナット、ワッシャを螺合しておく。そして、この芯材の一端部を、芯材に対してほぼ直交する取付けプレートの芯材挿通溝へ、プレート側方から差し入れて挿通させる。この状態で、プレート表面側に位置するダブルナットを締め付けて、このダブルナットとプレート裏面側に位置する単ナットとで取付けプレートを挟み込むことで、芯材の一端部が取付けプレートに取り付けられる。また、芯材の他端部も、一端部と同様にして取付けプレートの芯材挿通溝に挿通した状態で、プレート表面側においてダブルナットを締め付けることで、取付けプレートに取り付けられる。   Patent Document 3 also discloses a similar buckling restrained brace. In Patent Document 3, regarding the attachment of the buckling-restrained brace, the first fixing member includes a pair of vertical plates welded to the central portion of the left vertical member, and the upper and lower ends of the vertical plates that are cut obliquely. It is comprised from the attachment plate welded ranging between parts. The upper mounting plate is formed with a U-shaped core material insertion groove that extends obliquely downward from the center portion thereof and opens at the lower end center, and the lower mounting plate includes A U-shaped core material insertion groove is formed extending obliquely upward from the center and opening at the center of the upper end. The core material insertion grooves of these mounting plates permit the insertion of the core material of the buckling restraint brace from the open portion, that is, the side of the plate. The second and third fixing members are a pair of vertical plates welded across the right vertical member and the upper and lower horizontal members, and the mounting plate of the first fixing member so as to face the vertical plate. It is comprised from the attachment plate welded ranging between the upper end parts cut | disconnected diagonally or between lower end parts. A mounting plate for the second fixing member is formed with a U-shaped core member insertion groove extending obliquely downward from the center portion thereof and opening at the center of the lower end portion. The third fixing member mounting plate is also formed with a U-shaped core material insertion groove extending obliquely upward from the center portion thereof and opening at the center of the upper end portion. The core material insertion grooves of these mounting plates permit the insertion of the core material of the buckling restraint brace from the open portion, that is, the side of the plate. When attaching the core material to the mounting plate, a double nut, a single nut, and a washer as a fixture are screwed in advance to both ends of the core material. Then, one end of the core material is inserted from the side of the plate and inserted into the core material insertion groove of the mounting plate which is substantially orthogonal to the core material. In this state, the double nut located on the plate surface side is tightened, and the mounting plate is sandwiched between the double nut and the single nut located on the plate back side, so that one end of the core member is attached to the mounting plate. Further, the other end portion of the core member is attached to the attachment plate by tightening a double nut on the plate surface side in a state where the other end portion is inserted into the core member insertion groove of the attachment plate in the same manner as the one end portion.

特許第３７８１９６５号公報Japanese Patent No. 3781965 特許第３７８１９６６号公報Japanese Patent No. 3781966 特許第３８８３８２０号公報Japanese Patent No. 3883820

ところで、これら特許文献の座屈拘束ブレースでは、ビスの先端部を芯材に押し付けることで、スペーサーを芯材に固定している。あるいは、接着やカシメ等によってスペーサーを芯材に固定している。このような構成であると、引張力が作用して芯材が伸張し、その分断面が小さくなると、ビス先端部の押し付けやカシメが緩んだり、接着であっても剥がれが生じる虞が常にある。そして、この座屈拘束ブレースは、構造材間に斜めに取り付けられることから、大地震など芯材に大きな引張力が作用する、すなわち塑性域下となるような場合には、ビスやカシメ、接着等による芯材に対するスペーサーの固定が外れ、これによりスペーサー及び補剛材がそれらの自重で下方へズレ落ち、その結果、分散させていた芯材の縮み代が幾つかの箇所にまとまってしまって、これらまとまってしまった縮み代部分のうち、特にブレースの上端に位置する縮み代部分で芯材が局部座屈してしまう虞があるという問題があった。   By the way, in the buckling restrained braces of these patent documents, the spacer is fixed to the core material by pressing the tip of the screw against the core material. Alternatively, the spacer is fixed to the core material by adhesion or caulking. With such a configuration, when the core material is extended by the tensile force and the cross-section is reduced by that amount, there is always a risk that the screw tip will be pressed or caulked, or even if it is bonded, peeling will occur. . And since this buckling restrained brace is attached diagonally between structural materials, when a large tensile force acts on the core material such as a large earthquake, that is, when it is under the plastic zone, it is screwed, caulked, bonded The spacer is not fixed to the core material due to, for example, and the spacer and stiffener are displaced downward due to their own weights. Of these shrinkage margins, the core material may be locally buckled particularly at the shrinkage margin located at the upper end of the brace.

他方、これら特許文献の座屈拘束ブレースにおいて、圧縮力が芯材に作用すると、当該芯材は本来、圧縮方向（軸長方向）に補剛材の内面と摩擦接触しながら全長に亘って波打つような縮み変形を生じるが、この芯材に、外径が補剛材の内径より僅かに小さく形成されたスペーサーが固定されているために、芯材が縮み変形しようとした際に、その芯材の挙動（波打つような挙動）、すなわち芯材に作用する圧縮力が当該スペーサーに入力されこれを介して補剛材に伝達されてしまう虞がある。つまり、芯材が縮み変形する際に、圧縮方向に作用する力（摩擦力）以外の力の伝達が発生してしまうため、座屈拘束ブレースとしての性能が懸念されるという課題があった。   On the other hand, in the buckling restrained braces of these patent documents, when compressive force acts on the core material, the core material inherently corrugates over the entire length while being in frictional contact with the inner surface of the stiffener in the compression direction (axial length direction). However, since the spacer is fixed to this core material with an outer diameter slightly smaller than the inner diameter of the stiffener, when the core material tries to shrink and deform, There is a possibility that the behavior of the material (behaving like a wave), that is, the compressive force acting on the core material is input to the spacer and transmitted to the stiffener via this. That is, when the core material contracts and deforms, transmission of force other than the force acting in the compression direction (frictional force) occurs, and there is a problem that the performance as a buckling restrained brace is concerned.

本発明は上記従来の課題に鑑みて創案されたものであって、芯材、スペーサー及び管材の位置関係を適切に維持して、芯材の縮み代を確実に保持することが可能であって、これにより芯材の局部的な座屈を防止し、また、補剛材への圧縮力の伝達を抑制可能として、高いブレース性能を発揮させることが可能な座屈拘束ブレースを提供することを目的とする。   The present invention was devised in view of the above-described conventional problems, and can appropriately maintain the positional relationship of the core material, the spacer, and the tube material, and can reliably hold the shrinkage allowance of the core material. Thus, it is possible to provide a buckling-restrained brace capable of preventing the local buckling of the core material and suppressing the transmission of the compressive force to the stiffener, and exhibiting high brace performance. Objective.

本発明にかかる座屈拘束ブレースは、木造建物や中低層鉄骨造建物の構造材に両端部が接合されて圧縮力や引張力を受ける芯材を有する座屈拘束ブレースであって、上記芯材を長さ方向に分割して形成した分割芯材と、これら分割芯材同士を連結して繋ぐための中間連結部材と、長さ方向に間隔を隔てて配設された複数のスペーサーを外側に有し、内部に上記分割芯材が挿通されて上記中間連結部材の両側それぞれに配設される内管と、上記スペーサーを含む上記内管及び上記中間連結部材が内部に挿入され、かつ該中間連結部材が固定される外管と、圧縮力による上記分割芯材の縮み代を上記中間連結部材と上記内管との間に設定すると共に、引張時に該分割芯材の変形に伴って生じる該内管の移動を制限する内管移動制限手段とを備えたことを特徴とする（請求項１）。   A buckling-restrained brace according to the present invention is a buckling-restraining brace having a core material that is joined to both ends of a structural material of a wooden building or a medium- and low-rise steel structure building and receives a compressive force or a tensile force. A split core material formed by dividing the core material in the length direction, an intermediate connecting member for connecting and connecting the split core materials, and a plurality of spacers arranged at intervals in the length direction on the outside An inner tube that is inserted into the inner connecting member and disposed on both sides of the intermediate connecting member, the inner tube including the spacer and the intermediate connecting member are inserted into the inner tube, and the intermediate member The outer tube to which the connecting member is fixed, and the shrinkage allowance of the divided core material due to compressive force are set between the intermediate connecting member and the inner tube, and the tension generated when the divided core material is deformed when pulled. An inner pipe movement restricting means for restricting movement of the inner pipe It characterized the door (claim 1).

前記内管移動制限手段は、前記外管に設けられ、前記内管が前記中間連結部材から離れる方向へ移動するのを制限するために、前記スペーサーを係脱自在に係止するストッパーであることを特徴とする。   The inner pipe movement restricting means is a stopper provided on the outer pipe and for releasably locking the spacer to restrict the inner pipe from moving in a direction away from the intermediate connecting member. It is characterized by.

前記中間連結部材と前記内管との間に、該内管がその自重で該中間連結部材に近づく方向へ移動して前記分割芯材の縮み代が小さくならないように、当該内管を弾性支持する弾性体を設けたことを特徴とする。   The inner pipe is elastically supported between the intermediate connecting member and the inner pipe so that the inner pipe moves in a direction approaching the intermediate connecting member by its own weight and the shrinkage allowance of the split core member is not reduced. An elastic body is provided.

前記内管と前記分割芯材との間には、該分割芯材を補剛するために、互いに摩擦接触可能なクリアランスが設定されることを特徴とする。   In order to stiffen the divided core material, a clearance capable of frictional contact with each other is set between the inner tube and the divided core material.

前記外管と前記スペーサーとの間には、前記内管を介して前記分割芯材を補剛するために、互いに摩擦接触可能なクリアランスが設定されることを特徴とする。   In order to stiffen the divided core member via the inner tube, a clearance that allows frictional contact with each other is set between the outer tube and the spacer.

前記中間連結部材に連結された前記分割芯材の他端に連結され、前記外管の端部に挿入される端部カプラーを備え、該端部カプラーと前記内管との間に、圧縮力による上記分割芯材の縮み代が設定されることを特徴とする。   An end coupler connected to the other end of the split core connected to the intermediate connecting member and inserted into an end of the outer tube, and a compressive force between the end coupler and the inner tube The shrinkage allowance of the divided core material is set.

前記スペーサーを有する前記内管を長さ方向に分割して、分割内管を形成し、圧縮力による前記分割芯材の縮み代をこれら分割内管同士の間に設定すると共に、引張時に該分割芯材の変形に伴って生じる該分割内管の移動を制限する分割内管移動制限手段を備えたことを特徴とする。   The inner pipe having the spacer is divided in the length direction to form a divided inner pipe, and the contraction margin of the divided core material by the compressive force is set between the divided inner pipes, and the division is performed at the time of tension. It is characterized by comprising a divided inner tube movement restricting means for restricting the movement of the divided inner tube caused by the deformation of the core material.

前記分割内管移動制限手段は、前記外管に設けられ、該外管の端部側に位置する一方の前記分割内管が当該外管の中央部側に位置する他方の該分割内管から離れる方向へ移動するのを制限するために、前記スペーサーを係脱自在に係止するストッパーであることを特徴とする。   The divided inner pipe movement restricting means is provided in the outer pipe, and one of the divided inner pipes located on the end side of the outer pipe is separated from the other divided inner pipe located on the center side of the outer pipe. In order to restrict the movement in the direction of leaving, the stopper is a stopper that detachably locks the spacer.

前記分割内管同士の間に、一方の該分割内管がその自重で他方の該分割内管に近づく方向へ移動して前記分割芯材の縮み代が小さくならないように、当該一方の分割内管を弾性支持する弾性体を設けたことを特徴とする。   Between the divided inner pipes, one of the divided inner pipes moves in a direction approaching the other divided inner pipe by its own weight and the shrinkage allowance of the divided core material is not reduced. An elastic body for elastically supporting the tube is provided.

請求項１記載の座屈拘束ブレースの前記外管内部に前記中間連結部材を挿入して固定することに代えて、当該外管を長さ方向に分割して分割外管を形成し、上記中間連結部材の長さ方向両端にこれら分割外管の接合端部をそれぞれ固定すると共に、各分割外管内部それぞれに、前記スペーサを含む前記内管を挿入するようにしたことを特徴とする。   2. Instead of inserting and fixing the intermediate connecting member inside the outer tube of the buckling restrained brace according to claim 1, the outer tube is divided in a length direction to form a divided outer tube, and the intermediate tube The joining end portions of these divided outer tubes are fixed to both ends in the length direction of the connecting member, and the inner tube including the spacer is inserted into each divided outer tube.

本発明にかかる座屈拘束ブレースにあっては、芯材、スペーサー及び管材の位置関係を適切に維持して、芯材の縮み代を確実に保持することができ、これにより芯材の局部的な座屈を防止できると共に、また、補剛材への圧縮力の伝達を抑制することができて、高いブレース性能を発揮させることができる。   In the buckling restrained brace according to the present invention, the positional relationship among the core material, the spacer, and the tube material can be appropriately maintained, and the shrinkage allowance of the core material can be reliably maintained, whereby the core material is locally localized. Therefore, it is possible to prevent the buckling and to suppress the transmission of the compressive force to the stiffener, and to exhibit a high brace performance.

本発明に係る座屈拘束ブレースの好適な一実施形態の構造を説明するための斜視図である。It is a perspective view for demonstrating the structure of suitable one Embodiment of the buckling restraint brace which concerns on this invention. 図１に示した座屈拘束ブレースの概略側面図である。It is a schematic side view of the buckling restraint brace shown in FIG. 図１中、Ａ部拡大破断斜視図である。In FIG. 1, it is an A section enlarged fracture perspective view. 図１に示した座屈拘束ブレースの作用を説明するための説明図である。It is explanatory drawing for demonstrating the effect | action of the buckling restraint brace shown in FIG. 図１に示した座屈拘束ブレースにおける圧縮軸力の伝達作用を説明するための概略側断面図である。It is a schematic sectional side view for demonstrating the transmission effect | action of the compression axial force in the buckling restraint brace shown in FIG. 図１に示した座屈拘束ブレースの接合ネジ部の拡大側断面図である。It is an expanded sectional side view of the joining screw part of the buckling restraint brace shown in FIG. 圧縮軸力の伝達における問題を説明するための側断面図である。It is a sectional side view for demonstrating the problem in transmission of a compression axial force. 縮み代の確保における問題を説明するための説明図である。It is explanatory drawing for demonstrating the problem in ensuring of a contraction allowance. 接合ネジ部における問題を説明するための拡大側断面図である。It is an expanded side sectional view for demonstrating the problem in a joining screw part. 本発明に係る座屈拘束ブレースの変形例を示す側断面図である。It is a sectional side view which shows the modification of the buckling restraint brace which concerns on this invention. 本発明に係る座屈拘束ブレースの他の変形例を示す要部拡大側断面図である。It is a principal part expanded side sectional view which shows the other modification of the buckling restraint brace which concerns on this invention. 本発明に係る座屈拘束ブレースの他の変形例を示す外観の斜視図である。It is an external perspective view which shows the other modification of the buckling restraint brace which concerns on this invention. 本発明に係る座屈拘束ブレースの他の変形例を示す、図４（ｂ）に対応する図である。It is a figure corresponding to Drawing 4 (b) showing other modifications of a buckling restraint brace concerning the present invention.

以下に、本発明にかかる座屈拘束ブレースの好適な実施形態を、添付図面を参照して詳細に説明する。本実施形態にかかる座屈拘束ブレース１は、地震等の外力に対する負担荷重が比較的小さな木造建物や中低層鉄骨造建物に適用される。図１〜図６に示すように、本実施形態にかかる座屈拘束ブレース１は、主として、丸鋼で形成され、軸長方向に圧縮力や引張力を受ける棒状の分割芯材２と、中実筒体状の鋼製中間連結部材３と、接合用ブラケット４が設けられた中実筒体状の鋼製端部カプラー５と、チューブ状の鋼製内管６と、これら分割芯材２、中間連結部材３、端部カプラー５、並びに内管６が挿入されてこれらを収容するスリーブ状の鋼製外管７とを備えて構成される。図１（ａ）は内管６及び外管７を外した状態の斜視図、図１（ｂ）は外管７を外した状態の斜視図、図１（ｃ）は組み立てられた座屈拘束ブレース１の外観を示す斜視図である。   DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a buckling restrained brace according to the present invention will be described in detail with reference to the accompanying drawings. The buckling restrained brace 1 according to the present embodiment is applied to a wooden building or a medium- and low-rise steel structure building that has a relatively small burden load against an external force such as an earthquake. As shown in FIGS. 1 to 6, the buckling restrained brace 1 according to the present embodiment is mainly formed of round steel and has a rod-shaped split core 2 that receives a compressive force or a tensile force in the axial direction, A solid tubular steel intermediate connecting member 3, a solid tubular steel end coupler 5 provided with a joining bracket 4, a tubular steel inner pipe 6, and these split cores 2 The intermediate connecting member 3, the end coupler 5, and the inner tube 6 are inserted into the sleeve-shaped steel outer tube 7 for receiving them. 1A is a perspective view with the inner tube 6 and the outer tube 7 removed, FIG. 1B is a perspective view with the outer tube 7 removed, and FIG. 1C is an assembled buckling restraint. It is a perspective view which shows the external appearance of the brace 1. FIG.

ブレースは、縦材と横材で組んだ建物の架構内に上下方向斜めに差し渡されるもので、本来の芯材の軸長は、ほぼ差し渡し寸法とされる。分割芯材２は、本来の芯材を軸長方向に適宜長さ寸法で、例えば等長で分割して形成される。本実施形態にあっては、分割芯材２は、芯材を軸長方向に等しい長さで２分割して形成されている。しかしながら、分割芯材２は、不等長に分割してもよいし、また３分割以上としてもよい。その際、強度バランスを考慮して、分割芯材２の断面（径）を、それぞれ異なるように設定することもできる。これら分割芯材２には、本来の芯材と同様に引張力や圧縮力が作用し、引張によって、断面が小さくなる伸び変形が生じたり、圧縮により、座屈形態の縮み変形が生じる。   The brace is passed diagonally in the vertical direction in the frame of a building composed of vertical and horizontal members, and the original axial length of the core is approximately the passing dimension. The divided core material 2 is formed by dividing the original core material into an appropriate length in the axial direction, for example, by equal length. In the present embodiment, the divided core material 2 is formed by dividing the core material into two parts having the same length in the axial length direction. However, the divided core material 2 may be divided into unequal lengths, or may be divided into three or more. In that case, the cross-section (diameter) of the split core material 2 can be set differently in consideration of the strength balance. A tensile force and a compressive force are applied to these divided core members 2 in the same manner as the original core member, and tensile deformation causes elongation deformation that reduces the cross section, and compression causes buckling deformation.

各分割芯材２そのものについては、複数の短尺な丸鋼をカプラーで連結して一本ものに形成するようにしてもよい。   About each division | segmentation core material 2 itself, you may make it form in one by connecting a some short round steel with a coupler.

中間連結部材３は図４及び図５に示すように、これら分割芯材２同士をそれらの軸長方向に連結して繋ぎ、一本の芯材に構成するためのものである。中間連結部材３は、分割芯材２よりも変形しにくい高剛性で形成される。中間連結部材３の軸長方向両端部には、それぞれネジ孔３ａが形成され、各分割芯材２の一端に形成したネジ部２ａをこれらネジ孔３ａにそれぞれ螺合しナット８で締め付けることで、中間連結部材３の両側に各分割芯材２が接合される。分割芯材２は、中間連結部材３に溶接接合しても良い。中間連結部材３の軸長方向中央部には、外方へ向かって拡張して、固定用リング部９が一体的に設けられる。固定用リング部９は、外管７内に僅かな隙間をもって挿入し得るように、外管７の内径寸法よりも僅かに小さな外径寸法で形成される。   As shown in FIGS. 4 and 5, the intermediate connecting member 3 connects and connects these divided core members 2 in the axial length direction to form a single core member. The intermediate connecting member 3 is formed with high rigidity that is less likely to be deformed than the divided core member 2. Screw holes 3a are respectively formed at both ends in the axial length direction of the intermediate connecting member 3, and screw portions 2a formed at one end of each divided core member 2 are respectively screwed into these screw holes 3a and tightened with nuts 8. The divided core members 2 are joined to both sides of the intermediate connecting member 3. The split core member 2 may be welded to the intermediate connecting member 3. A fixing ring portion 9 is integrally provided at the central portion in the axial length direction of the intermediate connecting member 3 so as to extend outward. The fixing ring portion 9 is formed with an outer diameter dimension slightly smaller than the inner diameter dimension of the outer pipe 7 so that it can be inserted into the outer pipe 7 with a slight gap.

中間連結部材３に接合した各分割芯材２にはそれぞれ、それらの他端から中間連結部材３側へ向かって、内管６が挿通される。これにより、各内管６は、その内部に分割芯材２が挿入された状態で、中間連結部材３の両側にそれぞれ配設される。内管６は、分割芯材２の軸長よりも短く形成され、従って、内管６の両端部からは、分割芯材２の両端が突出される。   The inner pipe 6 is inserted into each of the divided core members 2 joined to the intermediate connecting member 3 from the other end toward the intermediate connecting member 3 side. Thereby, each inner pipe | tube 6 is each arrange | positioned by the state which inserted the division | segmentation core material 2 in the inside at the both sides of the intermediate | middle connection member 3, respectively. The inner tube 6 is formed shorter than the axial length of the divided core member 2, and therefore both ends of the divided core member 2 protrude from both end portions of the inner tube 6.

内管６は分割芯材２の挿通が可能であって、従って、内管６内周面と分割芯材２外周面の間には、互いに軸長方向に沿って移動自在なクリアランスＣ１（以下、「内管部クリアランス」という）が存在する。この内管部クリアランスＣ１は図５に示すように、圧縮力の作用でその軸長方向に波打つように縮み変形し得る分割芯材２を内管６で補剛するために、分割芯材２外周面が内管６内周面に当接して互いに摩擦接触することが可能な寸法に設定される。この摩擦接触Ｆ１によって、分割芯材２に作用する圧縮力の一部が内管６へ伝達され、内管６がこれを負担するようになっている。   The inner tube 6 allows the split core material 2 to be inserted. Accordingly, a clearance C1 (hereinafter referred to as “movable between the inner peripheral surface of the inner tube 6 and the outer peripheral surface of the split core material 2” along the axial length direction). "Inner tube clearance"). As shown in FIG. 5, the inner pipe clearance C1 is divided by the inner pipe 6 in order to stiffen the divided core 2 that can be shrunk and deformed so as to wave in the axial direction by the action of the compressive force. The outer peripheral surface is set to a size that allows contact with the inner peripheral surface of the inner tube 6 and frictional contact with each other. A part of the compressive force acting on the split core member 2 is transmitted to the inner tube 6 by the frictional contact F1, and the inner tube 6 bears this.

また、内管６の肉厚に関して、塑性化しない程度に薄くすることにより、分割芯材２が局部的に大きく外側へ押し出される力が生じた場合、内管６の弾性変形により、摩擦力が上昇することを抑えることができる。   Further, when the inner tube 6 is thinned to such an extent that it does not become plastic, when a force that causes the divided core member 2 to be locally pushed out to the outside is generated, a frictional force is generated due to elastic deformation of the inner tube 6. The rise can be suppressed.

内管６の外側には図４及び図５に示すように、その軸長方向に沿って適宜間隔を隔てて、例えば等間隔で、適宜厚さｔの複数のリング状スペーサー１０が一体的に設けられる。スペーサー１０は外管７内部へ挿入可能であって、従って、外管７内周面とスペーサー１０外周面の間には、互いに軸長方向に沿って移動自在なクリアランスＣ２（以下、「外管部クリアランス」という）が存在する。この外管部クリアランスＣ２は図５に示すように、適宜厚さｔのスペーサー１０外周面が外管７内周面に当接して互いに摩擦接触可能な寸法に設定される。この摩擦接触Ｆ２によって、外管７は、スペーサー１０を介して、内管６に作用する軸力の一部を負担する。すなわち、外管部クリアランスＣ２によるスペーサー１０と外管７との摩擦接触Ｆ２により、内管６に伝達された分割芯材２に作用する圧縮力の一部が外管７へ伝達され、この結果、外管７は内管６を介して、当該圧縮力の一部を負担して、分割芯材２を補剛するようになっている。   As shown in FIGS. 4 and 5, a plurality of ring-shaped spacers 10 of appropriate thickness t are integrally formed on the outer side of the inner tube 6 at appropriate intervals along the axial length direction, for example, at equal intervals. Provided. The spacer 10 can be inserted into the outer tube 7. Accordingly, a clearance C 2 (hereinafter referred to as “outer tube”) is movable between the inner peripheral surface of the outer tube 7 and the outer peripheral surface of the spacer 10 along the axial length direction. Part clearance ”). As shown in FIG. 5, the outer tube portion clearance C <b> 2 is set to such a dimension that the outer peripheral surface of the spacer 10 having an appropriate thickness t is in contact with the inner peripheral surface of the outer tube 7 and is in frictional contact with each other. By this frictional contact F2, the outer tube 7 bears a part of the axial force acting on the inner tube 6 via the spacer 10. That is, a part of the compressive force acting on the split core member 2 transmitted to the inner tube 6 is transmitted to the outer tube 7 by the frictional contact F2 between the spacer 10 and the outer tube 7 by the outer tube portion clearance C2. The outer tube 7 bears a part of the compressive force via the inner tube 6 and stiffens the divided core member 2.

図４に示すように、内管６から突出される各分割芯材２の他端にはそれぞれ、端部カプラー５が連結される。端部カプラー５は、その軸長方向全長にわたって、スペーサー１０や固定用リング部９相当の外径寸法で中実筒体状に形成される。これにより、端部カプラー５は外管７内に、当該外管７内周面に案内されて移動自在に挿入される。端部カプラー５は、分割芯材２よりも高剛性であって、外管７内周面に案内される形状であれば、その形態は問われず、中空筒体状であっても、フレーム形態であっても良い。   As shown in FIG. 4, an end coupler 5 is connected to the other end of each divided core member 2 protruding from the inner tube 6. The end coupler 5 is formed in a solid cylindrical shape with an outer diameter corresponding to the spacer 10 and the fixing ring portion 9 over the entire length in the axial direction. Accordingly, the end coupler 5 is inserted into the outer tube 7 movably while being guided by the inner peripheral surface of the outer tube 7. The end coupler 5 is not particularly limited as long as it has a rigidity higher than that of the split core 2 and is guided to the inner peripheral surface of the outer tube 7. It may be.

各端部カプラー５の軸長方向一端部にはネジ孔５ａが形成され、各分割芯材２の他端に形成した接合ネジ部２ｂをネジ孔５ａに螺合しナット１１で締め付けることで、各分割芯材２の他端に各端部カプラー５が接合される。互いにネジ結合される端部カプラー５のネジ孔５ａ及び分割芯材２他端の接合ネジ部２ｂは、座屈拘束ブレース１の全長を調整することができるように、螺合長さ調節可能に長く形成される。端部カプラー５に接合された分割芯材２は、端部カプラー５の外径寸法に比して極めて細径であって、外管７の両端部位置において、外管７内部にその内周面から空隙を隔てて遊挿された状態とされる。   A screw hole 5a is formed at one end in the axial length direction of each end coupler 5, and a joining screw portion 2b formed at the other end of each divided core member 2 is screwed into the screw hole 5a and tightened with a nut 11. Each end coupler 5 is joined to the other end of each divided core member 2. The threaded hole 5a of the end coupler 5 and the joining threaded part 2b at the other end of the split core 2 can be adjusted to be screwed so that the overall length of the buckling restraint brace 1 can be adjusted. Long formed. The split core material 2 joined to the end coupler 5 has a very small diameter compared to the outer diameter of the end coupler 5, and the inner circumference of the outer pipe 7 is located at both end positions of the outer pipe 7. It is in a state of being loosely inserted with a gap from the surface.

各端部カプラー５にはそれぞれ、分割芯材２の接合側とは反対側に、建物の構造材と接合するための接合用ブラケット４が接合される。各端部カプラー５の軸長方向他端部にはネジ孔５ｂが形成され、各接合用ブラケット４に形成したネジ部４ａをネジ孔５ｂに螺合しナット１２で締め付けることで、各端部カプラー５の他端部に接合用ブラケット４が接合される。図示例にあっては、接合用ブラケット４は、長さ方向に一連に複数のボルト孔４ｂが形成された剛接合用のものが示されている。従って、各分割芯材２の他端は、接合用ブラケット４付きの、分割芯材２よりも剛性の高い端部カプラー５を介して構造材に接合される。   Each end coupler 5 is joined to a joining bracket 4 for joining to a building structural material on the side opposite to the joining side of the split core member 2. A screw hole 5b is formed in the other end of each end coupler 5 in the axial length direction. Each end portion is formed by screwing a screw portion 4a formed in each joining bracket 4 into the screw hole 5b and tightening with a nut 12. A joining bracket 4 is joined to the other end of the coupler 5. In the illustrated example, the joining bracket 4 is for rigid joining in which a plurality of bolt holes 4b are formed in series in the length direction. Therefore, the other end of each divided core member 2 is joined to the structural member via the end coupler 5 with the joining bracket 4 and having rigidity higher than that of the divided core member 2.

後付けされる接合用ブラケット４を除き、外管７内部には、固定用リング部９を有する中間連結部材３、中間連結部材３に接合された分割芯材２に挿通したスペーサー１０付きの内管６、並びに端部カプラー５が挿入される。外管７内部に挿入された中間連結部材３は、プラグ溶接１３などの各種接合方法により、外管７に対し接合固定される。中間連結部材３の外管７への固定はこの他、図示しないが、固定用リング部９の外周に窪み部などを形成し、外管７外側から窪み部へ向かってネジをねじ込むような、機械式接合を採用しても良い。これにより、分割芯材２が外管７に対して固定されることになるが、前述したように、外管７に直接、接合固定される中間連結部材３は、その両端部にそれぞれ連結される分割芯材２よりも高剛性としていることから、分割芯材２に大きな引張力が作用した際に、各分割芯材２がそれぞれ伸張してその分断面が小さくなるものの、それに比して、中間連結部材３の変形はかなり小さいので、外管７との固定に悪影響を及ぼすようなことはなく、外管７が中間連結部材３に対してズレ落ちることもない。また、各端部カプラー５は、それぞれ外管７両端部内方に軸長方向へ移動自在に配置され、部分的に当該外管７端部から突出される。端部カプラー５に対する分割芯材２他端のねじ込み量を調節することで、座屈拘束ブレース１の全長が調整される。   Except for the joining bracket 4 to be retrofitted, an inner pipe with a spacer 10 inserted into an intermediate connecting member 3 having a fixing ring portion 9 and a split core 2 joined to the intermediate connecting member 3 is provided inside the outer pipe 7. 6 and the end coupler 5 are inserted. The intermediate connecting member 3 inserted into the outer tube 7 is joined and fixed to the outer tube 7 by various joining methods such as plug welding 13. In addition to the fixing of the intermediate connecting member 3 to the outer tube 7, although not shown, a recess or the like is formed on the outer periphery of the fixing ring portion 9, and a screw is screwed from the outer tube 7 outside toward the recess, Mechanical joining may be employed. As a result, the divided core member 2 is fixed to the outer tube 7. As described above, the intermediate connecting members 3 that are directly bonded and fixed to the outer tube 7 are respectively connected to both ends thereof. Since the divided core material 2 is more rigid than the divided core material 2, when a large tensile force is applied to the divided core material 2, each of the divided core materials 2 expands and the cross-section becomes smaller. Since the deformation of the intermediate connecting member 3 is quite small, the fixing with the outer tube 7 is not adversely affected, and the outer tube 7 is not displaced from the intermediate connecting member 3. Further, each end coupler 5 is disposed so as to be movable in the axial direction at both ends of the outer tube 7 and partially protrudes from the end of the outer tube 7. By adjusting the screwing amount of the other end of the split core member 2 with respect to the end coupler 5, the total length of the buckling restraint brace 1 is adjusted.

なお、端部カプラー５と各接合用ブラケット４に形成したネジ孔５ｂとネジ部４ａを逆ネジにしても良い。このようにすれば、外管７を回転させるだけで、座屈拘束ブレース１の全長を微調整することができ、分割芯材２に初期張力を導入することもできる。   The screw holes 5b and the screw portions 4a formed in the end coupler 5 and each joining bracket 4 may be reverse screws. In this way, the total length of the buckling restrained brace 1 can be finely adjusted by simply rotating the outer tube 7, and initial tension can be introduced into the split core material 2.

中間連結部材３位置を境として座屈拘束ブレース１の片側に関し、内管６の軸長は、分割芯材２の軸長、具体的には、端部カプラー５の締め付けナット１１及び中間連結部材３の締め付けナット８間距離よりも短く設定され、内管６から露出する分割芯材２の長さ分が、当該分割芯材２が圧縮力を受けたときに軸長方向に座屈形態で縮むのを許容する、分割芯材２の総縮み代（座屈拘束ブレース１の片側で）に設定される。内管６は内管部クリアランスＣ１によって分割芯材２に対し挿入可能、すなわち移動自在であって、従って、内管６位置は不定である。座屈拘束ブレース１は、上下方向斜めに取り付けられるため、そしてまた外管７のいずれの端部が上方取付部もしくは下方取付部となるか不明であるため、位置不定の内管６はいずれも、中間連結部材３よりも下方であれば端部カプラー５側に位置し得、中間連結部材３よりも上方であれば中間連結部材３側に位置し得ることになる。本実施形態にあっては、上記総縮み代を、内管移動制限手段１４によって、中間連結部材３側および端部カプラー５側の２箇所に２分割して設定するようになっている。また、内管６の自重の作用を考慮し、建物への取り付けにあたり中間連結部材３よりも上方に位置することとなる内管６を弾性支持するため、弾性体１６も備えるようにしている。   With respect to one side of the buckling restrained brace 1 with the position of the intermediate connecting member 3 as a boundary, the axial length of the inner tube 6 is the axial length of the split core member 2, specifically, the tightening nut 11 of the end coupler 5 and the intermediate connecting member. 3 is set to be shorter than the distance between the clamping nuts 8, and the length of the split core member 2 exposed from the inner tube 6 is buckled in the axial direction when the split core member 2 receives a compressive force. It is set to the total shrinkage allowance (on one side of the buckling restraint brace 1) of the split core member 2 that allows shrinkage. The inner tube 6 can be inserted into the split core member 2 by the inner tube clearance C1, that is, can move, and therefore the position of the inner tube 6 is indefinite. The buckling-restraining brace 1 is attached obliquely in the vertical direction, and since it is unclear which end of the outer tube 7 is the upper mounting portion or the lower mounting portion, any of the inner pipes 6 with indefinite positions are used. If it is below the intermediate connecting member 3, it can be located on the end coupler 5 side, and if it is above the intermediate connecting member 3, it can be located on the intermediate connecting member 3 side. In the present embodiment, the total shrinkage allowance is set by being divided into two parts on the intermediate connecting member 3 side and the end coupler 5 side by the inner tube movement restricting means 14. In consideration of the action of the inner weight of the inner pipe 6, an elastic body 16 is also provided to elastically support the inner pipe 6 that is positioned above the intermediate connecting member 3 when being attached to the building.

以下詳述すると、内管移動制限手段１４は、圧縮力による分割芯材２の縮み代Ｑ１を中間連結部材３と内管６との間に設定すると共に、引張時に分割芯材２の変形に伴って生じる内管６の移動を制限するために備えられる。本実施形態にあっては、内管移動制限手段１４によって、中間連結部材３と内管６との間の縮み代Ｑ１を設定することにより、同時に、端部カプラー５と内管６との間の縮み代Ｑ２も設定される。   More specifically, the inner tube movement restricting means 14 sets the shrinkage allowance Q1 of the divided core member 2 due to the compressive force between the intermediate connecting member 3 and the inner tube 6, and also deforms the divided core member 2 during tension. It is provided in order to limit the movement of the inner pipe 6 that accompanies it. In the present embodiment, the inner pipe movement restricting means 14 sets the shrinkage allowance Q1 between the intermediate connecting member 3 and the inner pipe 6 so that the end coupler 5 and the inner pipe 6 can be at the same time. Is also set.

内管移動制限手段１４は図４に示すように、外管７に設けられたストッパー１５で構成される。併せて、建物に取り付けたときに中間連結部材３よりも上方に位置することとなる内管６に対し、中間連結部材３の締め付けナット８と内管６端部との間に、内管６がその自重で中間連結部材３に近づく方向へ移動して分割芯材２の縮み代が小さくならないように、内管６を弾性支持する弾性体１６が設けられる。従って、弾性体１６は、建物に取り付けたときに中間連結部材３よりも下方に位置することとなる内管６に対しては、機能しない。   As shown in FIG. 4, the inner tube movement restricting means 14 includes a stopper 15 provided on the outer tube 7. In addition, with respect to the inner tube 6 that is positioned above the intermediate connecting member 3 when attached to the building, the inner tube 6 is interposed between the tightening nut 8 of the intermediate connecting member 3 and the end of the inner tube 6. Is provided with an elastic body 16 that elastically supports the inner tube 6 so that the shrinkage of the split core member 2 does not decrease by moving in the direction approaching the intermediate connecting member 3 by its own weight. Therefore, the elastic body 16 does not function with respect to the inner tube 6 that is positioned below the intermediate connecting member 3 when attached to the building.

ストッパー１５は、中間連結部材３と共に、いずれかのスペーサー１０を軸長方向から挟み込む配置で設けられる。図示例にあっては、中間連結部材３に隣接するスペーサー１０を挟み込む場合が示されているが、その他のスペーサー１０であってもよい。ストッパー１５は、内管６が中間連結部材３から離れる方向へ移動するのを制限するために、スペーサー１０を係脱自在に係止する。図示例にあっては、ストッパー１５は、外管７の周方向に適宜間隔で、外管７を貫通するピンを配設することで構成されている。ストッパー１５は、外管７内方へ外管部クリアランスＣ２以上に突出する凸部であって、スペーサー１０を係止し得るものであれば、どのような構造であってもよい。   The stopper 15 is provided together with the intermediate connecting member 3 so as to sandwich any spacer 10 from the axial length direction. In the illustrated example, the case where the spacer 10 adjacent to the intermediate connecting member 3 is sandwiched is shown, but other spacers 10 may be used. The stopper 15 detachably locks the spacer 10 in order to limit the movement of the inner tube 6 in the direction away from the intermediate connecting member 3. In the illustrated example, the stopper 15 is configured by arranging pins penetrating the outer tube 7 at appropriate intervals in the circumferential direction of the outer tube 7. The stopper 15 may have any structure as long as it is a convex portion projecting inward of the outer tube 7 to the outer tube portion clearance C2 or more and can lock the spacer 10.

弾性体１６は、中間連結部材３に向かい合う内管６端部と中間連結部材３の締め付けナット８との間で、内管６がその自重で中間連結部材３に近づく方向へ移動するのを制限するために、内管６を弾性作用で受け止めるようになっている。図示例にあっては、弾性体１６として、分割芯材２に挿通されるコイルバネが示されているが、リング状ゴムなど、その他の弾発部材であってもよい。   The elastic body 16 restricts the inner tube 6 from moving in the direction approaching the intermediate connecting member 3 by its own weight between the end of the inner tube 6 facing the intermediate connecting member 3 and the tightening nut 8 of the intermediate connecting member 3. In order to do so, the inner tube 6 is received by an elastic action. In the illustrated example, a coil spring inserted through the split core material 2 is shown as the elastic body 16, but other elastic members such as a ring-shaped rubber may be used.

中間連結部材３よりも上方では、弾性体１６により内管６の自重を支持し、これに伴って、外管７に固定した中間連結部材３に反力をとって、弾性体１６により、内管６を外管７端部方向へ押圧し、スペーサー１０をストッパー１５に係止させることによって、外管７内部における常時の内管６位置が設定され、内管６端部と中間連結部材３との間に、縮み代Ｑ１が設定される。同時に、外管７端部において、端部カプラー５と内管６端部との間にも、縮み代Ｑ２が設定される。   Above the intermediate connecting member 3, the elastic body 16 supports the own weight of the inner tube 6, and in response to this, a reaction force is applied to the intermediate connecting member 3 fixed to the outer tube 7. By pressing the tube 6 toward the end of the outer tube 7 and locking the spacer 10 to the stopper 15, the position of the inner tube 6 is always set inside the outer tube 7, and the end of the inner tube 6 and the intermediate connecting member 3 are set. The contraction allowance Q1 is set between At the same time, a shrinkage allowance Q2 is also set between the end coupler 5 and the inner tube 6 end at the outer tube 7 end.

中間連結部材３よりも下方では、スペーサー１０をストッパー１５に係止させることによって、外管７内部における常時の内管６位置が設定され、内管６端部と中間連結部材３との間に、縮み代Ｑ１が設定される。同時に、外管７端部において、端部カプラー５と内管６端部との間にも、縮み代Ｑ２が設定される。   Below the intermediate connecting member 3, by locking the spacer 10 to the stopper 15, the normal inner pipe 6 position inside the outer pipe 7 is set, and between the end of the inner pipe 6 and the intermediate connecting member 3. The shrinkage allowance Q1 is set. At the same time, a shrinkage allowance Q2 is also set between the end coupler 5 and the inner tube 6 end at the outer tube 7 end.

従って、本実施形態にかかる座屈拘束ブレース１にあっては、中間連結部材３を挟んでその両側に、４箇所の縮み代Ｑ１，Ｑ２が設定される。   Therefore, in the buckling restraint brace 1 according to the present embodiment, four shrinkage margins Q1 and Q2 are set on both sides of the intermediate connecting member 3.

図４（ａ）は本実施形態にかかる座屈拘束ブレースの圧縮状態、図４（ｂ）は復原状態、図４（ｃ）は引張状態をそれぞれ示している。圧縮時は、内管６は、内管部クリアランスＣ１によって摩擦接触可能な分割芯材２から伝達される圧縮力の一部を負担しつつ、分割芯材２に引きずられて、中間連結部材３へ向かって移動し得る。あるいは、圧縮力の作用による分割芯材２の変形によって端部カプラー５側で縮み代Ｑ２が無くなり、これにより端部カプラー５が内管６端部を押し出して、内管６が中間連結部材３側へ移動し得る場合もある。   4A shows a compressed state of the buckling restrained brace according to the present embodiment, FIG. 4B shows a restored state, and FIG. 4C shows a tensile state. At the time of compression, the inner tube 6 is dragged to the divided core member 2 while bearing a part of the compressive force transmitted from the divided core member 2 that can be brought into frictional contact with the inner tube portion clearance C <b> 1. Can move toward. Alternatively, the shrinkage allowance Q2 is eliminated on the end coupler 5 side due to the deformation of the split core member 2 due to the action of the compressive force, whereby the end coupler 5 pushes the end of the inner tube 6 and the inner tube 6 becomes the intermediate connecting member 3. Sometimes it can move to the side.

他方、引張時は、内管移動制限手段１４は、以下のように作用する。座屈拘束ブレース１は、上下方向斜めに取り付けられるため、スペーサー１０付きの内管６は分割芯材２に対し、自重でズレ落ちる習性がある。特に、分割芯材２が伸張作用を受けてその分断面が減少すると、内管部クリアランスＣ１により、容易に内管６が移動し、中間連結部材３側と端部カプラー５側とに分けた縮み代Ｑ１，Ｑ２がまとまってしまうおそれがある。本実施形態にあっては、図４中、下側が下方取付部、上側が上方取付部と見た場合に、中間連結部材３よりも下方では、ストッパー１５により、このような内管６のズレ落ちが阻止される。また中間連結部材３よりも上方では、弾性体１６により、同様にして内管６のズレ落ちが阻止される。従って、軸長方向に設定した４箇所の縮み代Ｑ１，Ｑ２が確実に維持される。   On the other hand, at the time of tension, the inner pipe movement restricting means 14 acts as follows. Since the buckling restraint brace 1 is attached obliquely in the vertical direction, the inner tube 6 with the spacer 10 has a habit of falling off due to its own weight with respect to the divided core member 2. In particular, when the split core material 2 is subjected to the expansion action and the cross section is reduced by that amount, the inner pipe 6 is easily moved by the inner pipe clearance C1, and divided into the intermediate connecting member 3 side and the end coupler 5 side. There is a risk that the shrinkage allowances Q1 and Q2 are combined. In the present embodiment, when the lower side is viewed as the lower mounting portion and the upper side is the upper mounting portion in FIG. 4, such a displacement of the inner pipe 6 is caused by the stopper 15 below the intermediate connecting member 3. Fall is prevented. Further, above the intermediate connecting member 3, the elastic body 16 similarly prevents the inner pipe 6 from being displaced. Accordingly, the four contraction margins Q1 and Q2 set in the axial length direction are reliably maintained.

また、圧縮後の引張時、内管部クリアランスＣ１での摩擦接触Ｆ１により、分割芯材２に引きずられて、内管６が中間連結部材３から離れる方向へ移動し得る。この際、中間連結部材３の上方であっても下方であっても、この内管６の移動は、内管移動制限手段１４によって制限され、これにより４箇所の縮み代Ｑ１，Ｑ２が確実に維持される。   Further, at the time of tension after compression, the inner tube 6 can move in a direction away from the intermediate connecting member 3 by being dragged to the split core member 2 by the frictional contact F1 at the inner tube portion clearance C1. At this time, the movement of the inner pipe 6 is restricted by the inner pipe movement restricting means 14 regardless of whether it is above or below the intermediate connecting member 3, thereby ensuring that the four shrinkage allowances Q 1 and Q 2 are secured. Maintained.

さらに、端部カプラー５と接合される分割芯材２の接合ネジ部２ｂは図６に示すように、分割芯材２の端部剛性を高めるために、転造によって分割芯材２の外径よりも太径に形成される。そして、当該接合ネジ部２ｂの長さが、接合用ブラケット４を介して構造材に接合される端部カプラー５との螺合長さ寸法αに、圧縮力によって分割芯材２が縮み得ると想定して設定された総縮み代βと引張力によって分割芯材２が伸び得ると想定して設定された総伸び代δとを加えた長さ（α＋β＋δ）を超える長い寸法を加え、内管６内部から外方へ亘る長さに設定される。   Further, as shown in FIG. 6, the joining screw portion 2 b of the split core material 2 to be joined to the end coupler 5 is rolled to form an outer diameter of the split core material 2 by rolling. It is formed in a larger diameter than. Then, when the split core material 2 can be contracted by the compression force to the screwing length dimension α with the end coupler 5 joined to the structural material via the joining bracket 4, the length of the joining screw portion 2 b. Add a long dimension that exceeds the length (α + β + δ), which is the sum of the total shrinkage allowance β set and the total elongation allowance δ set assuming that the split core material 2 can be stretched by the tensile force. 6 The length from the inside to the outside is set.

次に、本実施形態にかかる座屈拘束ブレース１の作用について説明する。まず、座屈拘束ブレース１の組み立てについて説明すると、中間連結部材３の両端部に、各分割芯材２を連結する。次に、連結した各分割芯材２それぞれに、弾性体１６及びスペーサー１０付きの内管６を順次挿通する。次に、各分割芯材２の他端に、端部カプラー５を接合する。その後、中間連結部材３、分割芯材２、並びに端部カプラー５の組立体を、外管７内部に挿入する。   Next, the effect | action of the buckling restraint brace 1 concerning this embodiment is demonstrated. First, the assembly of the buckling restrained brace 1 will be described. Each divided core member 2 is connected to both end portions of the intermediate connecting member 3. Next, the inner tube 6 with the elastic body 16 and the spacer 10 is sequentially inserted into each of the connected divided core members 2. Next, the end coupler 5 is joined to the other end of each divided core member 2. Thereafter, the assembly of the intermediate connecting member 3, the split core member 2, and the end coupler 5 is inserted into the outer tube 7.

次いで、固定用リング部９を外管７に接合固定して、組立体を外管７に対し固定する。最後に、ストッパー１５を外管７に取り付けると共に、端部カプラー５に接合用ブラケット４を取り付ける。固定用リング部９の外管７への取り付け位置は予め設定しておくので、接合用ブラケット４付きの端部カプラー５を外管７から突出させる量、すなわちブレース長は、接合ネジ部２ｂのねじ込み量で調節することができる。更に、接合用ブラケット４の端部カプラー５へのねじ込み量でも調整することができる。また、中間連結部材３の片側での２箇所の縮み代Ｑ１，Ｑ２は、ストッパー１５位置で設定することができる。   Next, the fixing ring portion 9 is bonded and fixed to the outer tube 7, and the assembly is fixed to the outer tube 7. Finally, the stopper 15 is attached to the outer tube 7 and the joining bracket 4 is attached to the end coupler 5. Since the mounting position of the fixing ring portion 9 to the outer tube 7 is set in advance, the amount by which the end coupler 5 with the joining bracket 4 protrudes from the outer tube 7, that is, the brace length, is the length of the joining screw portion 2b. It can be adjusted by screwing amount. Further, the amount of screwing of the joining bracket 4 into the end coupler 5 can be adjusted. Further, the two shrinkage margins Q1 and Q2 on one side of the intermediate connecting member 3 can be set at the stopper 15 position.

このようにして組み立てた座屈拘束ブレース１を、両端部の接合用ブラケット４を介して建物の構造材に接合し、当該建物の架構内に斜めに差し渡して取り付ける。   The buckling-restraining brace 1 assembled in this way is joined to the structural material of the building via the joining brackets 4 at both ends, and is obliquely passed and attached to the building frame.

建物に地震等の外力が加わると、座屈拘束ブレース１には、圧縮力と引張力が交互に繰り返し作用する。圧縮力は、接合用ブラケット４及び端部カプラー５を介して、分割芯材２に入力される。分割芯材２は、圧縮力の作用を受けて、座屈形態の縮み変形を生じる。分割芯材２は、内管６内では当該内管６の拘束作用で、僅かながら波打つように変形しつつ、内管部クリアランスＣ１により、圧縮力の一部が内管６へ伝達され、内管６がこれを負担する。また、外管部クリアランスＣ２により、内管６が負担する軸力の一部が外管７へ伝達され、外管７がこれを負担する。外管部クリアランスＣ２での軸力伝達に寄与するスペーサー１０は間隔を隔てて配設されかつ適宜厚さｔであることから、図７に示す場合のように内管６に伝達された軸力を当該内管６の外周面全面で外管７へ軸力伝達する場合に比べて、外管７への軸力伝達を小さくすることができ、外管７に過度の負担がかかることを防止することができる。   When an external force such as an earthquake is applied to the building, a compressive force and a tensile force are repeatedly applied to the buckling restraint brace 1 alternately. The compressive force is input to the split core member 2 through the joining bracket 4 and the end coupler 5. The split core material 2 is subjected to a compressive force to cause a buckling deformation. The split core material 2 is deformed so as to wave slightly in the inner tube 6 due to the restraining action of the inner tube 6, and a part of the compressive force is transmitted to the inner tube 6 by the inner tube clearance C <b> 1. Tube 6 bears this. Further, part of the axial force borne by the inner tube 6 is transmitted to the outer tube 7 by the outer tube portion clearance C2, and the outer tube 7 bears this. Since the spacers 10 that contribute to the transmission of the axial force in the outer tube clearance C2 are spaced apart and have an appropriate thickness t, the axial force transmitted to the inner tube 6 as shown in FIG. Compared to the case where the axial force is transmitted to the outer tube 7 over the entire outer peripheral surface of the inner tube 6, the axial force transmission to the outer tube 7 can be reduced, and an excessive load is prevented from being applied to the outer tube 7. can do.

また、分割芯材２は、端部カプラー５の移動を伴いつつ、内管移動制限手段１４によって中間連結部材３付近及び端部カプラー５付近に確保された４箇所の縮み代Ｑ１，Ｑ２で確実に縮み変形することができる。上述したように、内管６の自重のために、引張変形によって断面が減少した分割芯材２に対して、内管６が移動して縮み代Ｑが端部カプラー５側もしくは中間連結部材３側に偏ってまとまってしまうと、図８（ａ）又は図８（ｂ）に示すように、局部座屈が生じてしまう。これに対し、本実施形態にかかる座屈拘束ブレース１では、内管移動制限手段１４によって内管６位置を保持することができ、これにより全体で４箇所の縮み代Ｑ１，Ｑ２を確保することができて、分割芯材２の局部座屈を確実に防止することができる。   In addition, the split core material 2 is securely attached at the four shrinkage margins Q1 and Q2 secured in the vicinity of the intermediate coupling member 3 and the vicinity of the end coupler 5 by the inner pipe movement restricting means 14 while the end coupler 5 is moved. Can be shrunk and deformed. As described above, due to the weight of the inner tube 6, the inner tube 6 moves and the shrinkage allowance Q is on the end coupler 5 side or the intermediate connecting member 3 with respect to the split core material 2 whose cross section is reduced by tensile deformation. If they are biased toward the side, local buckling occurs as shown in FIG. 8 (a) or FIG. 8 (b). On the other hand, in the buckling restraint brace 1 according to the present embodiment, the position of the inner tube 6 can be held by the inner tube movement restricting means 14, thereby securing the four shrinkage allowances Q1 and Q2 as a whole. And local buckling of the split core material 2 can be reliably prevented.

他方、引張力については、端部カプラー５の移動を伴いつつ、分割芯材２が負担する。上述したように、内管移動制限手段１４により、分割芯材２の伸び変形で内管６がズレ落ちることや、分割芯材２によって内管６が中間連結部材３から離れる方向へ引きずられることを防止することができ、縮み代Ｑ１，Ｑ２を確実に維持することができる。   On the other hand, the split core material 2 bears the tensile force with the movement of the end coupler 5. As described above, the inner tube movement restriction means 14 causes the inner tube 6 to be displaced due to the elongation deformation of the divided core member 2, or the inner tube 6 is dragged in the direction away from the intermediate connecting member 3 by the divided core member 2. The shrinkage allowances Q1 and Q2 can be reliably maintained.

また、引張力を受けたとき分割芯材２が伸び変形し、図９に示すように、接合ネジ部２ｂが内管６端部から外方へ抜け出してしまうと、接合ネジ部２ｂ周辺で比較的大きく曲げが生じ得（図中、θ１で示す）、このために圧縮時には内管６へ入り込もうとする接合ネジ部２ｂが内管６端部で引っ掛かってしまったり、この位置で分割芯材２の局部座屈が生じるおそれがあるが、本実施形態にあっては、図６に示すように、接合ネジ部２ｂ自体が転造によって高剛性かつ太径に形成されていると共に、この接合ネジ部２ｂが内管６端部から抜け出すことのない長さ寸法（α＋β＋δ）で設定していて、曲げを抑制することができ（図中、θ２で示す）、接合ネジ部２ｂの引っ掛かりや局部座屈が生じることを確実に防止することができる。   Further, when the split core material 2 is stretched and deformed when subjected to a tensile force, and the joining screw portion 2b is pulled out from the end of the inner tube 6 as shown in FIG. 9, comparison is made around the joining screw portion 2b. A large bending may occur (indicated by θ1 in the figure). For this reason, the connecting screw portion 2b trying to enter the inner tube 6 may be caught at the end of the inner tube 6 at the time of compression. However, in this embodiment, as shown in FIG. 6, the joining screw portion 2b itself is formed to have a high rigidity and a large diameter by rolling, and this joining screw. The portion 2b is set with a length dimension (α + β + δ) that does not come out from the end of the inner tube 6 and can suppress bending (indicated by θ2 in the figure). It is possible to reliably prevent bending from occurring.

以上説明したように本実施形態にかかる座屈拘束ブレース１にあっては、芯材を長さ方向に分割して形成した分割芯材２と、これら分割芯材２同士を連結して繋ぐための中間連結部材３と、長さ方向に間隔を隔てて配設された複数のスペーサー１０を外側に有し、内部に分割芯材２が挿通されて中間連結部材３の両側それぞれに配設される内管６と、スペーサー１０を含む内管６及び中間連結部材３が内部に挿入され、かつ中間連結部材３が固定される外管７と、圧縮力による分割芯材２の縮み代Ｑ１を中間連結部材３と内管６との間に設定すると共に、引張時に分割芯材２の変形に伴って生じる内管６の移動を制限する内管移動制限手段１４とを備えたので、内管移動制限手段１４により、分割芯材２、スペーサー１０付き内管６及び外管７の相互位置関係を適切に維持して、縮み代Ｑ１を確実に保持することができ、これにより分割芯材２の局部的な座屈を防止できると共に、分割芯材２からスペーサー１０付き内管６経由で、軸力伝達を抑制しつつ圧縮力を外管７側へ伝達して、分割芯材２を適切に補剛することができ、高いブレース性能を発揮させることができる。   As described above, in the buckling restraint brace 1 according to the present embodiment, the split core material 2 formed by dividing the core material in the length direction and the divided core materials 2 are connected and connected. The intermediate connecting member 3 and a plurality of spacers 10 arranged at intervals in the lengthwise direction are provided on the outside, and the split core material 2 is inserted into the intermediate connecting member 3 on both sides thereof. The inner pipe 6 including the spacer 10, the inner pipe 6 including the spacer 10 and the intermediate connecting member 3 are inserted therein, and the outer pipe 7 to which the intermediate connecting member 3 is fixed, and the shrinkage allowance Q1 of the split core member 2 due to the compressive force. The inner pipe is provided between the intermediate connecting member 3 and the inner pipe 6 and has an inner pipe movement restricting means 14 for restricting the movement of the inner pipe 6 caused by the deformation of the divided core member 2 during tension. Due to the movement limiting means 14, the split core material 2, the inner tube 6 with the spacer 10 and the outer tube Thus, the shrinkage allowance Q1 can be reliably maintained, thereby preventing local buckling of the split core 2 and the inner pipe with the spacer 10 from the split core 2. 6, compressive force can be transmitted to the outer tube 7 side while suppressing axial force transmission, and the split core material 2 can be appropriately stiffened, and high brace performance can be exhibited.

内管移動制限手段１４を、外管７に設けられ、内管６が中間連結部材３から離れる方向へ移動するのを制限するために、スペーサー１０を係脱自在に係止するストッパー１５で構成したので、内管６のズレ落ちや分割芯材２による引きずりなど、内管６の移動を簡単な構造で防止することができる。   The inner tube movement restricting means 14 is configured by a stopper 15 provided on the outer tube 7 and for releasably locking the spacer 10 in order to restrict the inner tube 6 from moving in a direction away from the intermediate connecting member 3. Therefore, the movement of the inner tube 6 such as slippage of the inner tube 6 or dragging by the divided core member 2 can be prevented with a simple structure.

中間連結部材３と内管６との間に、内管６がその自重で中間連結部材３に近づく方向へ移動して分割芯材２の縮み代Ｑ１が小さくならないように、当該内管６を弾性支持する弾性体１６を設けたので、上下いずれに向けて取り付けられるか不明の座屈拘束ブレース１において、上側に位置する内管６を支持して、適切に縮み代Ｑ１を確保することができる。   The inner tube 6 is placed between the intermediate connecting member 3 and the inner tube 6 so that the inner tube 6 moves in a direction approaching the intermediate connecting member 3 by its own weight and the shrinkage allowance Q1 of the divided core member 2 is not reduced. Since the elastic body 16 to be elastically supported is provided, in the buckling restraint brace 1 where it is unknown whether the elastic body 16 is attached to the upper or lower side, the inner pipe 6 positioned on the upper side is supported to appropriately secure the shrinkage allowance Q1. it can.

内管６と分割芯材２との間に、分割芯材２を補剛するために、互いに摩擦接触可能な内管部クリアランスＣ１を設定したので、圧縮力の作用で波打つように変形する分割芯材２から内管６へ軸力を伝達させて、内管６により適切に分割芯材２を補剛することができる。   In order to stiffen the split core member 2 between the inner pipe 6 and the split core member 2, the inner pipe clearance C1 that can be brought into frictional contact with each other is set. By transmitting axial force from the core material 2 to the inner tube 6, the divided core material 2 can be appropriately stiffened by the inner tube 6.

外管７とスペーサー１０との間に、内管６を介して分割芯材２を補剛するために、互いに摩擦接触可能な外管部クリアランスＣ２を設定したので、内管６から外管７へ軸力の一部を伝達することができ、内管６を介して外管７により分割芯材２を適切に補剛することができる。   In order to stiffen the split core material 2 via the inner tube 6 between the outer tube 7 and the spacer 10, the outer tube portion clearance C2 that can be brought into frictional contact with each other is set. A part of the axial force can be transmitted to the inner core 6, and the split core material 2 can be appropriately stiffened by the outer tube 7 through the inner tube 6.

中間連結部材３に連結された分割芯材２の他端に連結され、外管７の端部に挿入される端部カプラー５を備え、端部カプラー５と内管６との間に、圧縮力による分割芯材２の縮み代Ｑ２を設定するようにしたので、縮み代Ｑ２を外管７端部にも備えることができて、ブレース性能を向上することができる。   An end coupler 5 connected to the other end of the split core 2 connected to the intermediate connecting member 3 and inserted into the end of the outer tube 7 is provided, and is compressed between the end coupler 5 and the inner tube 6. Since the shrinkage allowance Q2 of the split core material 2 by force is set, the shrinkage allowance Q2 can be provided at the end of the outer tube 7 and the brace performance can be improved.

分割芯材２を、これを補剛するための内管６内部に、内管６端部から当該分割芯材２端部が突出するように挿通すると共に、分割芯材２端部に、転造によって分割芯材２自体の外径よりも太径な接合ネジ部２ｂを形成し、接合ネジ部２ｂの長さを、構造材に接合される端部カプラー５との螺合長さ寸法に、圧縮力による分割芯材２の想定縮み代と引張力による分割芯材２の想定伸び代とを加えた長さ（α＋β＋δ）を超える長い寸法を加え、内管６の内部から外方に亘る長さに設定したので、座屈拘束ブレース１の端部位置で、接合ネジ部２ｂの引っ掛かりや局部座屈が生じることを防ぐことができ、これにより分割芯材２に適切に圧縮力や引張力を作用させて、高いブレース性能を発揮させることができる。   The split core material 2 is inserted into the inner tube 6 for stiffening the split core material 2 so that the end of the split core material 2 projects from the end of the inner tube 6, and the split core material 2 is rolled to the end of the split core material 2. The joining screw part 2b having a diameter larger than the outer diameter of the split core material 2 itself is formed by the construction, and the length of the joining screw part 2b is set to the screwing length dimension with the end coupler 5 joined to the structural material. In addition, a long dimension exceeding the length (α + β + δ) obtained by adding the assumed shrinkage allowance of the split core material 2 due to the compressive force and the assumed elongation allowance of the split core material 2 due to the tensile force is applied, and extends from the inside of the inner pipe 6 to the outside Since the length is set, it is possible to prevent the joining screw portion 2b from being caught or locally buckled at the end position of the buckling restrained brace 1, thereby appropriately compressing or tensioning the split core material 2. By applying force, high brace performance can be demonstrated.

分割芯材２を、これを補剛するための外管７内部に、その内周面から空隙を隔てて遊挿し、外管７端部内方に、分割芯材２よりも高剛性であって、分割芯材２の他端と接合されかつ外管７の内周面に案内されて軸長方向、すなわち外管７の管軸方向へ移動自在な端部カプラー５を設け、端部カプラー５を介して分割芯材２の他端を構造材に接合するようにしたので、分割芯材２を構造材に直接接合する場合とは異なり、分割芯材２よりも高剛性の端部カプラー５によって、接合部周辺で分割芯材２端部が塑性化したり、塑性ヒンジ状態になることを防ぐことができる。また、端部カプラー５により、分割芯材２の端部側で簡単かつ合理的な補強を確保することができ、接合部構造側に求められる必要剛性を低減でき、その構成を簡素化することができる。   The split core material 2 is loosely inserted into the outer tube 7 for stiffening the core member 2 with a gap from the inner peripheral surface thereof, and is more rigid than the split core material 2 at the inner end of the outer tube 7. An end coupler 5 is provided which is joined to the other end of the split core 2 and guided to the inner peripheral surface of the outer tube 7 and is movable in the axial length direction, that is, in the tube axis direction of the outer tube 7. Since the other end of the split core material 2 is joined to the structural material via the intermediate member, unlike the case where the split core material 2 is directly joined to the structural material, the end coupler 5 having higher rigidity than the split core material 2 is used. Therefore, it is possible to prevent the end portion of the split core member 2 from being plasticized or in a plastic hinge state around the joint. In addition, the end coupler 5 can ensure simple and reasonable reinforcement on the end side of the split core member 2, can reduce the required rigidity required on the joint structure side, and simplify the configuration. Can do.

端部カプラー５と分割芯材２の端部とを、螺合長さ調節可能にネジ結合したので、ブレース長を簡単に調節することができる。   Since the end coupler 5 and the end of the split core member 2 are screw-coupled so that the screwing length can be adjusted, the brace length can be easily adjusted.

図１０には、上記実施形態の変形例が示されている。この変形例は、縮み代Ｑ３を増設するために、スペーサー１０を有する内管６を軸長方向に２分割して分割内管６Ａ，６Ｂを形成し、これを組み込むようにしたものである。縮み代Ｑ３を適切に維持するために、この変形例にあっては、上記実施形態における内管移動制限手段１４と同様な、分割内管移動制限手段１７が増設される。   FIG. 10 shows a modification of the above embodiment. In this modification, in order to increase the shrinkage allowance Q3, the inner pipe 6 having the spacer 10 is divided into two in the axial length direction to form divided inner pipes 6A and 6B, which are incorporated. In order to appropriately maintain the shrinkage allowance Q3, in this modified example, the divided inner pipe movement restricting means 17 similar to the inner pipe movement restricting means 14 in the above embodiment is added.

中間連結部材３位置を境として座屈拘束ブレース１の片側に関し、２つの第１及び第２分割内管６Ａ，６Ｂの総軸長は、上記内管６の軸長から、増設する縮み代Ｑ３の長さ分を差し引いた長さであって、この総軸長を２分割した軸長で、各分割内管６Ａ，６Ｂの長さが設定される。中間連結部材３側の第１分割内管６Ａは、図４に示した内管移動制限手段１４により位置が保持されるが、端部カプラー５側の第２分割内管６Ｂは、位置不定となる。当該変形例にあっては、増設する分割内管移動制限手段１７によって、第１及び第２分割内管６Ａ，６Ｂ相互間（増設分）と端部カプラー５側の縮み代Ｑ２，Ｑ３を確保するようになっている。また、建物への取り付けにあたり中間連結部材３よりも上方に位置する側の分割内管６Ａ，６Ｂの自重を考慮し、外管７端部側に位置する内管６Ｂを弾性支持するため、弾性体１６の他に、副弾性体１９も備えるようにしている。   The total axial length of the two first and second divided inner pipes 6A and 6B is reduced from the axial length of the inner pipe 6 with respect to one side of the buckling restraint brace 1 with the position of the intermediate connecting member 3 as a boundary. The length of each of the divided inner pipes 6A and 6B is set to a length obtained by subtracting the total length of the divided inner pipes 6A and 6B. The position of the first divided inner pipe 6A on the intermediate connecting member 3 side is held by the inner pipe movement restricting means 14 shown in FIG. 4, but the position of the second divided inner pipe 6B on the end coupler 5 side is indefinite. Become. In the modified example, the additional split inner pipe movement restricting means 17 secures the contraction margins Q2 and Q3 between the first and second split inner pipes 6A and 6B (additions) and the end coupler 5 side. It is supposed to be. In addition, in consideration of the weight of the divided inner pipes 6A and 6B on the side located above the intermediate connecting member 3 for attachment to the building, the inner pipe 6B located on the end side of the outer pipe 7 is elastically supported to provide elasticity. In addition to the body 16, a secondary elastic body 19 is also provided.

分割内管移動制限手段１７は、圧縮力による分割芯材２の縮み代を分割内管６Ａ，６Ｂ同士の間に設定すると共に、引張時に分割芯材２の変形に伴って生じる第２分割内管６Ｂの移動を制限するために備えられる。本実施形態にあっては、分割内管移動制限手段１７によって、分割内管６Ａ，６Ｂ同士の間の増設分の縮み代Ｑ３を設定することにより、同時に、端部カプラー５と第２分割内管６Ｂとの間の縮み代Ｑ２も設定される。   The split inner tube movement restricting means 17 sets a shrinkage allowance of the split core member 2 due to the compressive force between the split inner tubes 6A and 6B, and generates a second split inner tube generated along with the deformation of the split core member 2 during tension. It is provided to limit the movement of the tube 6B. In the present embodiment, the split inner pipe movement restricting means 17 sets the contraction allowance Q3 for the extension between the split inner pipes 6A and 6B, so that the end coupler 5 and the second split inner pipe are simultaneously set. The shrinkage allowance Q2 between the pipe 6B is also set.

分割内管移動制限手段１７は図１０に示すように、外管７に設けられた副ストッパー１８で構成される。併せて、建物に取り付けたときに中間連結部材３よりも上方に位置することとなる側に対し、第１分割内管６Ａ端部と第２分割内管６Ｂ端部との間に、分割内管６Ｂがその自重で中間連結部材３側の分割内管６Ａに近づく方向へ移動して分割芯材２の縮み代Ｑ３が小さくならないように、分割内管６Ｂを弾性支持する副弾性体１９が設けられる。従って、副弾性体１９は、建物に取り付けたときに中間連結部材３よりも下方に位置することとなる側では、機能しない。   As shown in FIG. 10, the divided inner tube movement restricting means 17 includes a sub stopper 18 provided on the outer tube 7. At the same time, with respect to the side that will be positioned above the intermediate connecting member 3 when attached to the building, the inner space between the first divided inner pipe 6A end and the second divided inner pipe 6B end A secondary elastic body 19 that elastically supports the divided inner tube 6B is provided so that the tube 6B does not move by its own weight in a direction approaching the divided inner tube 6A on the intermediate connecting member 3 side and the shrinkage allowance Q3 of the divided core member 2 is not reduced. Provided. Accordingly, the secondary elastic body 19 does not function on the side that is positioned below the intermediate connecting member 3 when attached to the building.

副ストッパー１８は、第１分割内管６Ａと共に、第２分割内管６Ｂのいずれかのスペーサー１０を軸長方向から挟み込む配置で設けられる。図示例にあっては、副弾性体１９に隣接するスペーサー１０を挟み込む場合が示されているが、その他のスペーサー１０であってもよい。副ストッパー１８は、第２分割内管６Ｂが第１分割内管６Ａから離れる方向へ移動するのを制限するために、第２分割内管６Ｂのスペーサー１０を係脱自在に係止する。図示例にあっては、副ストッパー１８は、外管７の周方向に適宜間隔で、外管７を貫通するピンを配設することで構成されている。副ストッパー１８は、外管７内方へ外管部クリアランスＣ２以上に突出する凸部であって、スペーサー１０を係止し得るものであれば、どのような構造であってもよい。   The sub stopper 18 is provided so as to sandwich the spacer 10 of the second divided inner pipe 6B from the axial length direction together with the first divided inner pipe 6A. In the illustrated example, the case where the spacer 10 adjacent to the auxiliary elastic body 19 is sandwiched is shown, but other spacers 10 may be used. The sub stopper 18 removably locks the spacer 10 of the second divided inner pipe 6B in order to restrict the movement of the second divided inner pipe 6B in the direction away from the first divided inner pipe 6A. In the illustrated example, the sub stopper 18 is configured by arranging pins penetrating the outer tube 7 at appropriate intervals in the circumferential direction of the outer tube 7. The sub-stopper 18 may be any structure as long as it is a convex part protruding inward of the outer pipe 7 to the outer pipe part clearance C2 or more and can lock the spacer 10.

副弾性体１９は、第１および第２分割内管６Ａ，６Ｂの端部間で、第２分割内管６Ｂがその自重で第１分割内管６Ａに近づく方向へ移動するのを制限するために、第２分割内管６Ｂを弾性作用で受け止めるようになっている。図示例にあっては、副弾性体１９として、分割芯材２に挿通されるコイルバネが示されているが、リング状ゴムなど、その他の弾発部材であってもよい。   The secondary elastic body 19 restricts the movement of the second divided inner pipe 6B in the direction approaching the first divided inner pipe 6A by its own weight between the end portions of the first and second divided inner pipes 6A and 6B. In addition, the second divided inner pipe 6B is received by an elastic action. In the illustrated example, a coil spring inserted through the split core member 2 is shown as the secondary elastic body 19, but other elastic members such as a ring rubber may be used.

中間連結部材３よりも上方では、副弾性体１９により第２分割内管６Ｂの自重を支持し、これに伴って、第１分割内管６Ａに反力をとって、副弾性体１９により、第２分割内管６Ｂを外管７端部方向へ押圧し、スペーサー１０を副ストッパー１８に係止させることによって、外管７内部における常時の第２分割内管６Ｂ位置が設定され、第２分割内管６Ｂと第１分割内管６Ａとの間に、増設した縮み代Ｑ３が設定される。同時に、外管７端部において、端部カプラー５と第２分割内管６Ｂ端部との間にも、縮み代Ｑ２が設定される。   Above the intermediate connecting member 3, the secondary elastic body 19 supports the own weight of the second divided inner pipe 6 </ b> B, and accordingly, the secondary elastic body 19 takes a reaction force on the first divided inner pipe 6 </ b> A. By pressing the second divided inner pipe 6B in the direction of the end of the outer pipe 7 and locking the spacer 10 to the sub stopper 18, the position of the second divided inner pipe 6B at the inside of the outer pipe 7 is set. An increased shrinkage allowance Q3 is set between the divided inner pipe 6B and the first divided inner pipe 6A. At the same time, the shrinkage allowance Q2 is also set between the end coupler 5 and the end of the second divided inner tube 6B at the end of the outer tube 7.

中間連結部材３よりも下方では、スペーサー１０を副ストッパー１８に係止させることによって、外管７内部における常時の第２分割内管６Ｂ位置が設定され、第２分割内管６Ｂ端部と第１分割内管６Ａとの間に、縮み代Ｑ３が設定される。同時に、外管７端部において、端部カプラー５と第２分割内管６Ｂ端部との間にも、縮み代Ｑ２が設定される。   Below the intermediate connecting member 3, by locking the spacer 10 to the sub stopper 18, the position of the second divided inner tube 6 </ b> B in the outer tube 7 is always set, and the end of the second divided inner tube 6 </ b> B A shrinkage allowance Q3 is set between the one-divided inner pipe 6A. At the same time, the shrinkage allowance Q2 is also set between the end coupler 5 and the end of the second divided inner tube 6B at the end of the outer tube 7.

従って、本実施形態にかかる座屈拘束ブレース１にあっては、中間連結部材３を挟んでその両側に、６箇所の縮み代Ｑ１〜Ｑ３が設定される。   Therefore, in the buckling restraint brace 1 according to the present embodiment, six shrinkage allowances Q1 to Q3 are set on both sides of the intermediate connecting member 3.

増設した縮み代Ｑ３部分における分割芯材２の強度を増強する必要がある場合には、その断面を大きく設定すれば良く、当該縮み代Ｑ３部分で分割芯材２同士をさらに分割して接続カプラーで接続するようにしたり、薄いアルミ板材などを分割芯材２に巻き付けたりすればよい。   When it is necessary to increase the strength of the split core material 2 in the expanded shrinkage allowance Q3 portion, the cross section may be set large, and the split core material 2 is further divided at the shrinkage allowance Q3 portion to connect couplers. It is only necessary to connect with a thin core plate 2 or a thin aluminum plate or the like.

圧縮時は、第２分割内管６Ｂは、内管部クリアランスＣ１によって摩擦接触可能な分割芯材２から伝達される圧縮力の一部を負担しつつ、分割芯材２に引きずられて、第１分割内管６Ａへ向かって移動し得る。あるいは、圧縮力の作用による分割芯材２の変形によって端部カプラー５側で縮み代Ｑ２が無くなり、これにより端部カプラー５が第２分割内管６Ｂ端部を押し出して、第２分割内管６Ｂが第１分割内管６Ａ側へ移動し得る場合もある。   At the time of compression, the second divided inner pipe 6B is dragged to the divided core material 2 while bearing a part of the compressive force transmitted from the divided core material 2 that can be brought into frictional contact by the inner pipe clearance C1. It can move toward the one-divided inner pipe 6A. Alternatively, the shrinkage allowance Q2 is eliminated on the end coupler 5 side due to the deformation of the split core member 2 due to the action of the compressive force, whereby the end coupler 5 pushes the end of the second split inner pipe 6B, and the second split inner pipe 6B may be able to move toward the first divided inner tube 6A.

他方、引張時は、分割内管移動制限手段１７は、以下のように作用する。座屈拘束ブレース１は、上下方向斜めに取り付けられるため、スペーサー１０付きの各分割内管６Ａ，６Ｂは分割芯材２に対し、自重でズレ落ちる習性がある。特に、分割芯材２が伸張作用を受けてその分断面が減少すると、内管部クリアランスＣ１により、容易に各分割内管６Ａ，６Ｂが移動し、中間連結部材３側、端部カプラー５側及び分割内管６Ａ，６Ｂ間に分けた縮み代Ｑ１〜Ｑ３が幾つかにまとまってしまうおそれがある。   On the other hand, at the time of tension, the divided inner pipe movement restricting means 17 operates as follows. Since the buckling restrained brace 1 is attached obliquely in the vertical direction, each of the divided inner pipes 6A and 6B with the spacer 10 has a habit of being displaced by its own weight with respect to the divided core member 2. In particular, when the divided core member 2 is subjected to the expansion action and the cross section is reduced accordingly, the inner pipe portion clearance C1 easily moves the divided inner pipes 6A and 6B, and the intermediate connecting member 3 side and the end coupler 5 side. In addition, there is a risk that some of the shrinkage allowances Q1 to Q3 divided between the divided inner pipes 6A and 6B are collected.

これに対し、本変形例にあっては、中間連結部材３よりも下方では、ストッパー１５及び副ストッパー１８により、このような分割内管６Ａ，６Ｂのズレ落ちが阻止される。また中間連結部材３よりも上方では、弾性体１６及び副弾性体１９により、同様にして分割内管６Ａ，６Ｂのズレ落ちが阻止される。従って、内管移動制限手段１４及び分割内管移動制限手段１７により、軸長方向に設定した６箇所の縮み代Ｑ１〜Ｑ３を適切に維持することができる。   On the other hand, in this modification, below the intermediate connecting member 3, the stopper 15 and the sub stopper 18 prevent such a slippage of the divided inner pipes 6A and 6B. In addition, above the intermediate connecting member 3, the elastic body 16 and the secondary elastic body 19 similarly prevent the split inner pipes 6A and 6B from falling off. Accordingly, the inner pipe movement restricting means 14 and the divided inner pipe movement restricting means 17 can appropriately maintain the six shrinkage allowances Q1 to Q3 set in the axial length direction.

また、圧縮後の引張時、内管部クリアランスＣ１での摩擦接触Ｆ１により、分割芯材２に引きずられて、各分割内管６Ａ，６Ｂが中間連結部材３及び第１分割内管６Ａから離れる方向へ移動し得る。この際、中間連結部材３の上方であっても下方であっても、この分割内管６Ａ，６Ｂの移動は、内管移動制限手段１４及び分割内管移動制限手段１７によって制限され、これにより６箇所の縮み代Ｑ１〜Ｑ３を確実に維持することができる。   Further, during tension after compression, the divided inner pipes 6A and 6B are separated from the intermediate connecting member 3 and the first divided inner pipe 6A by being dragged to the divided core member 2 by the frictional contact F1 at the inner pipe clearance C1. Can move in the direction. At this time, the movement of the divided inner pipes 6A and 6B is restricted by the inner pipe movement restricting means 14 and the divided inner pipe movement restricting means 17 both above and below the intermediate connecting member 3, thereby Six shrinkage allowances Q1 to Q3 can be reliably maintained.

このような変形例にあっても、上記実施形態と同様の作用効果を奏することはもちろんである。特に、縮み代Ｑ３を増設することができ、座屈拘束ブレース１の性能をさらに向上することができる。また、本変形例では、内管６を軸長方向に２分割したものを例示したが、内管６を３分割以上に分割し、それぞれを分割内管として、縮み代をさらに増設しても良いことはもちろんである。   Even in such a modification, it is needless to say that the same effects as those of the above-described embodiment can be obtained. In particular, the shrinkage allowance Q3 can be increased, and the performance of the buckling restrained brace 1 can be further improved. Further, in this modification, the inner pipe 6 is divided into two in the axial direction, but the inner pipe 6 is divided into three or more parts, and each of them is divided into inner pipes, so that the shrinkage allowance can be further increased. Of course it is good.

図１１には、別の変形例が示されている。分割芯材２に端部カプラー５を結合する構成を採用することにより、上記実施形態では、建物の構造材に対し、剛接合可能な接合用ブラケット４を取り付ける場合を例示して説明したが、図示するようなピン孔２０を有する接合用ブラケット４を取り付けることもでき、このように端部カプラー５を備えることにより、分割芯材２端部をピン結合可能として、構造材との接合部構造の堅牢性を軽減することができ、複雑かつ剛強、高コストの接合部にすることなく、簡易かつ軽量で、低コストの接合部にて、適切かつ健全に座屈拘束ブレース１を建物に装着することができる。本変形例にあっても、上記実施形態と同様の作用効果を奏することはもちろんである。   FIG. 11 shows another modification. By adopting the configuration in which the end coupler 5 is coupled to the split core member 2, in the above embodiment, the case where the joint bracket 4 that can be rigidly joined is attached to the building structural material has been described as an example. A joining bracket 4 having a pin hole 20 as shown in the figure can be attached, and by providing the end coupler 5 in this way, the end part of the split core member 2 can be pin-coupled to form a joint structure with a structural material. The buckling restraint brace 1 can be attached to the building appropriately and soundly at a low-cost, simple, light-weight joint without the need for a complicated, rigid, and high-cost joint. can do. Even in the present modification, it is a matter of course that the same operational effects as in the above embodiment can be obtained.

図１２には、さらに他の変形例が示されている。この変形例は、上記実施形態において、外管７内部に中間連結部材３を挿入して固定するようにしていたことに代えて、当該外管７を長さ方向に分割して分割外管７Ａ，７Ｂを形成し、分割芯材２を連結した中間連結部材３の長さ方向両端にこれら分割外管７Ａ，７Ｂの接合端部をそれぞれ固定するようにしている。中間連結部材３の両端に直接分割外管７Ａ，７Ｂを固定するので、固定用リング部９を設ける必要はない。固定方法としては、溶接であっても、接着であっても良い。各分割外管７Ａ，７Ｂ内部それぞれには、上記実施形態と同様に、スペーサ１０を含む内管６及び端部カプラー５が挿入される。   FIG. 12 shows still another modification. In this modified example, in place of the intermediate connecting member 3 being inserted and fixed in the outer tube 7 in the above embodiment, the outer tube 7 is divided in the length direction and divided outer tube 7A. 7B are formed, and the joining end portions of the divided outer tubes 7A and 7B are fixed to both ends in the length direction of the intermediate connecting member 3 to which the divided core member 2 is connected. Since the split outer tubes 7A and 7B are directly fixed to both ends of the intermediate connecting member 3, it is not necessary to provide the fixing ring portion 9. The fixing method may be welding or adhesion. The inner pipe 6 including the spacer 10 and the end coupler 5 are inserted into each of the divided outer pipes 7A and 7B, as in the above embodiment.

変形例における組立について説明すると、中間連結部材３の両端に、各分割芯材２を連結する。次に、連結した各分割芯材２それぞれに、弾性体１６及びスペーサー１０付きの内管６を順次挿通する。次に、各分割芯材２の他端に、端部カプラー５を接合する。その後、中間連結部材３、分割芯材２、並びに端部カプラー５の組立体に、各分割外管７Ａ，７Ｂを外側から装着する。次いで、中間連結部材３と各分割外管７Ａ，７Ｂとを接合固定して、組立体に対し分割外管７Ａ，７Ｂを固定する。最後に、ストッパー１５を各分割外管７Ａ，７Ｂに取り付けると共に、端部カプラー５に接合用ブラケット４を取り付ける。   The assembly in the modified example will be described. Each divided core member 2 is connected to both ends of the intermediate connecting member 3. Next, the inner tube 6 with the elastic body 16 and the spacer 10 is sequentially inserted into each of the connected divided core members 2. Next, the end coupler 5 is joined to the other end of each divided core member 2. Thereafter, the divided outer tubes 7A and 7B are attached to the assembly of the intermediate connecting member 3, the divided core member 2, and the end coupler 5 from the outside. Next, the intermediate connecting member 3 and the divided outer pipes 7A and 7B are joined and fixed, and the divided outer pipes 7A and 7B are fixed to the assembly. Finally, the stopper 15 is attached to each of the divided outer pipes 7A and 7B, and the joining bracket 4 is attached to the end coupler 5.

このような変形例にあっては、中間連結部材３を外管７内部に挿入して固定するのに比べて、簡単に製造することができ、生産性を向上することができる。本変形例にあっても、上記実施形態と同様の作用効果を奏することはもちろんである。   In such a modified example, compared to inserting and fixing the intermediate connecting member 3 inside the outer tube 7, it can be manufactured easily and productivity can be improved. Even in the present modification, it is a matter of course that the same operational effects as in the above embodiment can be obtained.

図１３には、さらに他の変形例が示されている。この変形例は、内管移動制限手段１４として、上記実施形態のストッパー１５に代えて、内管６と端部カプラー５との間に設定される縮み代Ｑ２部分に、弾発部材２１を設けて構成したものである。この構成によると、分割芯材２の弾性域に関し、ストッパー１５で内管６の移動に制限を加えることに比べて、弾性体１６（中間連結部材３よりも下方部位）および弾発部材２１（中間連結部材３よりも上方部位）を設けた箇所における縮み代Ｑ１，Ｑ２を増加させることができ、より安定したブレース性能を確保することができる。本変形例にあっても、上記実施形態と同様の作用効果を奏することはもちろんである。   FIG. 13 shows still another modification. In this modified example, a resilient member 21 is provided as the inner tube movement restricting means 14 in the contraction allowance Q2 set between the inner tube 6 and the end coupler 5 instead of the stopper 15 of the above embodiment. It is configured. According to this configuration, the elastic body 16 (lower part than the intermediate connecting member 3) and the elastic member 21 (with respect to the elastic region of the divided core member 2 are compared with the restriction of the movement of the inner tube 6 by the stopper 15). The shrinkage allowances Q1 and Q2 at the place where the upper part of the intermediate connecting member 3 is provided can be increased, and more stable brace performance can be ensured. Even in the present modification, it is a matter of course that the same operational effects as in the above embodiment can be obtained.

以上に述べた座屈拘束ブレースは、本発明の好ましい例であって、これ以外の実施形態例も、各種の方法で実施または遂行できる。特に、本願明細書中に限定される主旨の記載がない限り、この発明は、添付図面に示した詳細な部品の形状、大きさおよび構成配置等に制約されるものではない。また、本願明細書中に用いられた表現および用語は、説明を目的としたもので、特に限定される主旨の記載がない限り、それに限定されるものではない。   The buckling restrained brace described above is a preferred example of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise stated in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

１ 座屈拘束ブレース
２ 分割芯材
３ 中間連結部材
５ 端部カプラー
６ 内管
６Ａ，６Ｂ 分割内管
７ 外管
７Ａ，７Ｂ 分割内管
１０ スペーサー
１４ 内管移動制限手段
１５ ストッパー
１６ 弾性体
１７ 分割内管移動制限手段
１８ 副ストッパー
１９ 副弾性体
Ｃ１ 内管部クリアランス
Ｃ２ 外管部クリアランス
Ｑ１〜Ｑ３ 縮み代 DESCRIPTION OF SYMBOLS 1 Buckling restraint brace 2 Split core material 3 Intermediate | middle connection member 5 End coupler 6 Inner pipe 6A, 6B Split inner pipe 7 Outer pipe 7A, 7B Split inner pipe 10 Spacer 14 Inner pipe movement restricting means 15 Stopper 16 Elastic body 17 Split Inner tube movement limiting means 18 Sub stopper 19 Sub elastic body C1 Inner tube clearance C2 Outer tube clearance Q1-Q3 Shrinkage allowance

Claims (10)

木造建物や中低層鉄骨造建物の構造材に両端部が接合されて圧縮力や引張力を受ける芯材を有する座屈拘束ブレースであって、
上記芯材を長さ方向に分割して形成した分割芯材と、
これら分割芯材同士を連結して繋ぐための中間連結部材と、
長さ方向に間隔を隔てて配設された複数のスペーサーを外側に有し、内部に上記分割芯材が挿通されて上記中間連結部材の両側それぞれに配設される内管と、
上記スペーサーを含む上記内管及び上記中間連結部材が内部に挿入され、かつ該中間連結部材が固定される外管と、
圧縮力による上記分割芯材の縮み代を上記中間連結部材と上記内管との間に設定すると共に、引張時に該分割芯材の変形に伴って生じる該内管の移動を制限する内管移動制限手段とを備えたことを特徴とする座屈拘束ブレース。 A buckling-restrained brace having a core material that is joined at both ends to a structural material of a wooden building or a medium- and low-rise steel structure building and receives a compressive force or a tensile force,
A split core material formed by dividing the core material in the length direction;
An intermediate connecting member for connecting and connecting these divided cores;
An inner pipe having a plurality of spacers arranged at intervals in the length direction on the outside, the divided core member being inserted therein and arranged on both sides of the intermediate connecting member;
The inner pipe including the spacer and the intermediate connecting member inserted therein, and the outer pipe to which the intermediate connecting member is fixed;
Inner tube movement that sets a shrinkage allowance of the divided core material due to compressive force between the intermediate connecting member and the inner tube and restricts movement of the inner tube caused by deformation of the divided core material during tension. A buckling restrained brace characterized by comprising a limiting means. 前記内管移動制限手段は、前記外管に設けられ、前記内管が前記中間連結部材から離れる方向へ移動するのを制限するために、前記スペーサーを係脱自在に係止するストッパーであることを特徴とする請求項１に記載の座屈拘束ブレース。   The inner pipe movement restricting means is a stopper provided on the outer pipe and for releasably locking the spacer to restrict the inner pipe from moving in a direction away from the intermediate connecting member. The buckling restrained brace according to claim 1. 前記中間連結部材と前記内管との間に、該内管がその自重で該中間連結部材に近づく方向へ移動して前記分割芯材の縮み代が小さくならないように、当該内管を弾性支持する弾性体を設けたことを特徴とする請求項１又は２に記載の座屈拘束ブレース。   The inner pipe is elastically supported between the intermediate connecting member and the inner pipe so that the inner pipe moves in a direction approaching the intermediate connecting member by its own weight and the shrinkage allowance of the split core member is not reduced. The buckling restraint brace according to claim 1, wherein an elastic body is provided. 前記内管と前記分割芯材との間には、該分割芯材を補剛するために、互いに摩擦接触可能なクリアランスが設定されることを特徴とする請求項１〜３いずれかの項に記載の座屈拘束ブレース。   The clearance according to any one of claims 1 to 3, wherein a clearance capable of frictional contact with each other is set between the inner tube and the divided core material in order to stiffen the divided core material. The buckling restraint brace described. 前記外管と前記スペーサーとの間には、前記内管を介して前記分割芯材を補剛するために、互いに摩擦接触可能なクリアランスが設定されることを特徴とする請求項１〜４いずれかの項に記載の座屈拘束ブレース。   The clearance between the outer tube and the spacer is set so as to be in frictional contact with each other in order to stiffen the divided core member via the inner tube. A buckling-restrained brace described in the above section. 前記中間連結部材に連結された前記分割芯材の他端に連結され、前記外管の端部に挿入される端部カプラーを備え、
該端部カプラーと前記内管との間に、圧縮力による上記分割芯材の縮み代が設定されることを特徴とする請求項１〜５いずれかの項に記載の座屈拘束ブレース。 An end coupler connected to the other end of the split core connected to the intermediate connecting member and inserted into an end of the outer tube;
The buckling restrained brace according to any one of claims 1 to 5, wherein a shrinkage allowance of the split core material by a compressive force is set between the end coupler and the inner tube. 前記スペーサーを有する前記内管を長さ方向に分割して、分割内管を形成し、
圧縮力による前記分割芯材の縮み代をこれら分割内管同士の間に設定すると共に、引張時に該分割芯材の変形に伴って生じる該分割内管の移動を制限する分割内管移動制限手段を備えたことを特徴とする請求項１〜６いずれかの項に記載の座屈拘束ブレース。 Dividing the inner tube having the spacer in the length direction to form a divided inner tube;
A split inner pipe movement restricting means for setting a shrinkage allowance of the split core material by a compressive force between the split inner pipes and restricting movement of the split inner pipe caused by deformation of the split core material during tension. The buckling restrained brace according to any one of claims 1 to 6, further comprising: 前記分割内管移動制限手段は、前記外管に設けられ、該外管の端部側に位置する一方の前記分割内管が当該外管の中央部側に位置する他方の該分割内管から離れる方向へ移動するのを制限するために、前記スペーサーを係脱自在に係止するストッパーであることを特徴とする請求項７に記載の座屈拘束ブレース。   The divided inner pipe movement restricting means is provided in the outer pipe, and one of the divided inner pipes located on the end side of the outer pipe is separated from the other divided inner pipe located on the center side of the outer pipe. The buckling-restraining brace according to claim 7, wherein the bracing-restraining brace is a stopper that detachably locks the spacer in order to restrict movement in the direction of separation. 前記分割内管同士の間に、一方の該分割内管がその自重で他方の該分割内管に近づく方向へ移動して前記分割芯材の縮み代が小さくならないように、当該一方の分割内管を弾性支持する弾性体を設けたことを特徴とする請求項７又は８に記載の座屈拘束ブレース。   Between the divided inner pipes, one of the divided inner pipes moves in a direction approaching the other divided inner pipe by its own weight and the shrinkage allowance of the divided core material is not reduced. The buckling restraint brace according to claim 7 or 8, further comprising an elastic body that elastically supports the tube. 請求項１記載の座屈拘束ブレースの前記外管内部に前記中間連結部材を挿入して固定することに代えて、当該外管を長さ方向に分割して分割外管を形成し、上記中間連結部材の長さ方向両端にこれら分割外管の接合端部をそれぞれ固定すると共に、各分割外管内部それぞれに、前記スペーサを含む前記内管を挿入するようにしたことを特徴とする座屈拘束ブレース。   2. Instead of inserting and fixing the intermediate connecting member inside the outer tube of the buckling restrained brace according to claim 1, the outer tube is divided in a length direction to form a divided outer tube, and the intermediate tube The junction end portion of the divided outer tube is fixed to both ends in the length direction of the connecting member, and the inner tube including the spacer is inserted into each divided outer tube. Restraint brace.
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