JP4146808B2 - Frame reinforcement and its joint structure - Google Patents

Frame reinforcement and its joint structure Download PDF

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JP4146808B2
JP4146808B2 JP2004033147A JP2004033147A JP4146808B2 JP 4146808 B2 JP4146808 B2 JP 4146808B2 JP 2004033147 A JP2004033147 A JP 2004033147A JP 2004033147 A JP2004033147 A JP 2004033147A JP 4146808 B2 JP4146808 B2 JP 4146808B2
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frame
reinforcing
existing
column
beam column
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JP2005226238A (en
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太史郎 藤村
裕美 鈴木
泰弘 西川
和浩 金田
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Taisei Corp
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Description

本発明は、構造物の耐震性を増加するために既設梁柱架構の内面に増設する補強用の架構補強用面材とその接合構造に関する。   TECHNICAL FIELD The present invention relates to a reinforcing frame reinforcing surface member to be added to the inner surface of an existing beam column frame in order to increase the earthquake resistance of the structure, and a joint structure thereof.

耐震性が不十分であると判断された既設建物に対する一般的な補強構造としては、柱と梁から形成される既設梁柱架構の架構内面に、鉄骨により構成された長方形の枠部材の内部に鉄骨ブレース（枠補強部材）が設けられている、枠付補強架構（架構補強用面材）を増設することにより、既設建物の剛性と耐力とを増加させる補強構造がある。ここで、内面とは、左右の柱部材と上下の梁部材とにより囲まれる空間をいう。   As a general reinforcement structure for existing buildings that have been judged to be insufficient in earthquake resistance, the internal structure of an existing beam column structure made up of columns and beams is placed inside a rectangular frame member made of steel. There is a reinforcing structure that increases the rigidity and proof strength of an existing building by adding a framed reinforcing frame (frame reinforcing material) provided with a steel brace (frame reinforcing member). Here, the inner surface means a space surrounded by the left and right column members and the upper and lower beam members.

従来、これらの枠付補強架構の既設建物への取り付けは、図４（ａ）に示すように、アンカー工法により行われていた。当該アンカー工法は、（１）アンカーボルト１２１を既設梁柱架構１２０の内面に所定のピッチにて打設するアンカー打設工程、（２）枠部材１１１のウェブ外周にスタッド１１２が所定間隔で設けられた枠付補強架構１１０を配置する面材配置工程、（３）既設梁柱架構１２０と枠付補強架構１１０との間に形成された空間１４０にスパイラル鉄筋１４１を配筋する配筋工程、（４）枠部材１１１と既設梁柱架構１２０の接合部に型枠１３０の設置を行う型枠工程、（５）枠部材１１１と既設梁柱架構１２０との間の空間１４０にモルタルの注入を行う注入工程、により行われていた（例えば特許文献１参照）。しかし、アンカーボルト１２１の打設の際に大きな騒音や振動が発生することとともに、作業工程が多く、また作業が煩雑で手間がかかるという問題点を有していた。そのため、騒音や振動が発生しない枠付補強架構の既設建物への取付方法として、接着工法により行う方法（例えば特許文献２参照）や取付金具を介して行う方法（例えば特許文献３参照）が開発され実用化に至っている。   Conventionally, these reinforced frames with frames have been attached to existing buildings by an anchor method as shown in FIG. The anchor construction method includes (1) an anchor placing step in which anchor bolts 121 are placed on the inner surface of the existing beam column 120 at a predetermined pitch, and (2) studs 112 are provided on the outer circumference of the frame member 111 at predetermined intervals. A surface material arranging step for arranging the framed reinforcing frame 110; (3) a bar arranging step for arranging the spiral reinforcing bar 141 in the space 140 formed between the existing beam column frame 120 and the framed reinforcing frame 110; (4) Forming process for installing the formwork 130 at the joint between the frame member 111 and the existing beam column frame 120. (5) Injecting mortar into the space 140 between the frame member 111 and the existing beam column frame 120. It was performed by the injection | pouring process to perform (for example, refer patent document 1). However, when the anchor bolt 121 is driven, there is a problem that a large noise and vibration are generated, there are many work processes, and the work is complicated and troublesome. Therefore, as a method of attaching a framed reinforcing frame that does not generate noise or vibration to an existing building, a method using an adhesive method (for example, see Patent Document 2) or a method using an attachment fitting (for example, see Patent Document 3) has been developed. It has been put to practical use.

前者の接着工法は、図４（ｂ）に示すように、既設梁柱架構２２０の梁部材又は柱部材と枠付補強架構２１０との間隙２４０に、エポキシ樹脂等の接着剤を注入して一体化を図る工法であり、Ｈ型鋼のフランジがそれぞれ長方形の外周面と内周面となるように構成された枠部材２１１を、所定の間隙２４０を有して既設梁柱架構２２０の内面に配置した後、注入する接着剤が流出することがないようにシール材２３０を、前記間隙２４０を密閉するように塗布して、接着剤を前記間隙２４０に注入することにより既設梁柱架構２２０と枠付補強架構２１０との一体化を図る工法である。   As shown in FIG. 4B, the former bonding method is performed by injecting an adhesive such as epoxy resin into the beam member of the existing beam column frame 220 or the gap 240 between the column member and the framed reinforcement frame 210, and integrating them. A frame member 211 having an H-shaped steel flange formed on a rectangular outer peripheral surface and an inner peripheral surface is disposed on the inner surface of the existing beam column frame 220 with a predetermined gap 240. After that, the sealing material 230 is applied so as to seal off the gap 240 so that the injected adhesive does not flow out, and the adhesive is injected into the gap 240 to thereby form the frame with the existing beam column frame 220. This is a method for integrating with the attached reinforcing frame 210.

また、後者の取り付け金物を介する取付方法は、図５に示すように、既設梁柱架構３２０の梁部材又は柱部材を、断面コの字状の取付金具３１２の凹部３３０に挿入して、接着剤３４０などにより固定した後、当該取付金具３１２に鋼製ブロック３１１等の鋼製ブロック壁３１０を取り付ける工法である。取付金具３１２には、予め鋼製ブロック３１１の固定用金具として、固定用ボルト３１３が突設されており、この固定用ボルト３１３に鋼製ブロック３１１を取り付けることにより、鋼製ブロック壁３１０と既設梁柱架構３２０との一体化が可能となる。
特開２００１−１３２２４０号公報（［０００６］−［００２４］、図１） 特開平１１−７１９０６号公報（［００１６］−［００１９］、図１） 特開昭５８−１４６６６３号公報（第１頁右欄２０行目−第２頁左下欄２行目、第２図−第４図） Further, as shown in FIG. 5, the latter mounting method using the mounting hardware is performed by inserting the beam member or the column member of the existing beam column frame 320 into the recess 330 of the U-shaped mounting bracket 312 and bonding them. This is a method of attaching a steel block wall 310 such as a steel block 311 to the mounting bracket 312 after fixing with an agent 340 or the like. A fixing bolt 313 is projected in advance from the mounting bracket 312 as a fixing bracket for the steel block 311. By attaching the steel block 311 to the fixing bolt 313, the steel block wall 310 and the existing steel block 311 are installed. Integration with the beam column frame 320 is possible.
JP 2001-132240 A ([0006]-[0024], FIG. 1) JP 11-71906 A ([0016]-[0019], FIG. 1) JP-A-58-146663 (first page, right column, line 20-page 2, lower left column, second line, FIGS. 2 to 4)

しかしながら、梁幅が細い既設梁柱架構では、前記の接着工法により取り付けた場合、梁下面のみでは必要とされる接着面積が確保されないために既設梁柱架構と枠付補強架構との間でせん断力の伝達が十分になされず、十分な補強ができないという問題点を有している。また、特に枠部材上面と梁部材との接着に関して、接着剤自体の沈降や硬化に伴う自己収縮が起こるので、梁下の接合部に空隙が生じる可能性があるという問題点を有している。   However, in the existing beam column frame with a narrow beam width, when it is attached by the above-mentioned bonding method, the required bonding area is not secured only on the lower surface of the beam, so shearing between the existing beam column frame and the framed reinforcement frame is not possible. There is a problem that force transmission is not sufficient and sufficient reinforcement cannot be performed. In addition, particularly with respect to the bonding between the upper surface of the frame member and the beam member, self-shrinkage occurs due to the settling or curing of the adhesive itself, which may cause a gap in the joint portion under the beam. .

一方の取付金具３１２による工法は、取付金具３１２により形成された凹部３３０に梁部材を挿入して固定するため、梁部材の側面での接着も行われ、所定の接着面積を確保することが可能であるが、取付金具３１２と鋼製ブロック壁３１０との固定用ボルト３１３により２点でしか結合されておらず、両ボルト３１３，３１３による固定点Ａ，Ａの固定幅ｘ’が狭く、面外方向の回転に対する固定度が低いという問題点を有している。つまり、地震時の水平力が当該既設梁柱架構３２０に加わった場合に、この固定用ボルト３１３による接合部が損傷したり面外方向に回転を起こしてせん断抵抗できない可能性がある。   In the construction method using one mounting bracket 312, since the beam member is inserted and fixed in the recess 330 formed by the mounting bracket 312, bonding on the side surface of the beam member is also performed, and a predetermined bonding area can be secured. However, it is connected only at two points by fixing bolts 313 between the mounting bracket 312 and the steel block wall 310, and the fixing width x ′ of the fixing points A and A by both bolts 313 and 313 is narrow, There is a problem that the degree of fixation with respect to rotation in the outward direction is low. That is, when a horizontal force at the time of an earthquake is applied to the existing beam column frame 320, there is a possibility that the joint portion by the fixing bolt 313 may be damaged or rotated in an out-of-plane direction to prevent shear resistance.

本発明は、前記の問題点を解決することを目的とするものであり、梁部材に対して所望の接着面積を確保しつつ、既設梁柱架構と架構補強用面材との間でせん断力の伝達を確実に行うことが可能な、架構補強用面材を提案することを課題とする。   The present invention is intended to solve the above-mentioned problems, and while securing a desired adhesion area to the beam member, the shear force between the existing beam column frame and the frame reinforcing surface material is obtained. It is an object of the present invention to propose a frame reinforcing face material capable of reliably transmitting the frame.

前記の課題を解決するために本発明は、両側に立設した柱部材と当該両側の柱部材に横設されている上下の梁部材とから形成されている既設梁柱架構の内面に設置される架構補強用面材であって、前記既設梁柱架構の内面形状に合せて形成された枠部材と、前記枠部材を補強するための枠補強部材と、を備え、前記枠部材の上面には、前記上梁部材を抱持する凹部を形成する取付金具が、前記枠部材の面外方向の両端部で固定されていることを特徴とする、架構補強用面材である。   In order to solve the above-mentioned problems, the present invention is installed on the inner surface of an existing beam column structure formed of column members standing on both sides and upper and lower beam members horizontally disposed on the column members on both sides. A frame member formed according to the shape of the inner surface of the existing beam column frame, and a frame reinforcing member for reinforcing the frame member, and is provided on the upper surface of the frame member. Is a frame reinforcing surface material, characterized in that mounting brackets forming recesses for holding the upper beam member are fixed at both ends of the frame member in the out-of-plane direction.

かかる架構補強用面材は、枠部材の上面に、梁部材を抱持する凹部が形成されていることにより、架構補強用面材の既設梁柱架構への接着において、梁部材下面の面積に加えて、梁部材の側面の一部に関しても、接着を行うため、梁部材が細い既設梁柱架構に関しても、所望の接着面積を確保することができ、既設梁柱架構と架構補強用面材との一体化を確実に行うことが可能となる。また、取付金具の枠部材への接合は、枠部材上面の前後両端部において固定されているため、枠部材と一体となって、既設梁柱架構に加わる応力を吸収するとともに、面外方向への回転を抑止することが可能となる。
また、前記枠部材には、前記凹部を形成する前記取付金具の変形を抑止するための、凹部補強部材が備えられていれば、グラウト注入による圧力や何らかの負荷が当該凹部に加わることによる凹部の変形を防止することができるため好適である。 In such a frame reinforcing surface material, a concave portion for holding the beam member is formed on the upper surface of the frame member, so that the area of the lower surface of the beam member can be reduced in bonding the frame reinforcing surface material to the existing beam column frame. In addition, since a part of the side surface of the beam member is also bonded, a desired bonding area can be secured even for an existing beam column frame with a thin beam member. It is possible to reliably perform integration with. In addition, since the attachment of the mounting bracket to the frame member is fixed at the front and rear end portions of the upper surface of the frame member, it is integrated with the frame member to absorb the stress applied to the existing beam column frame and in the out-of-plane direction. Can be prevented.
In addition, if the frame member is provided with a recess reinforcing member for suppressing deformation of the mounting bracket that forms the recess, the pressure due to grouting or some load is applied to the recess. This is preferable because deformation can be prevented.

さらに、前記既設梁柱架構への前記架構補強用面材の接合構造は、前記凹部により前記上梁部材を抱持し、且つ前記凹部と前記上梁部材との間に形成された目地部に充填材を充填して一体化することを特徴としている。
ここで、抱持とは、凹部に上梁部材が所定の間隙を有して挿入された状態をいい、当該間隙に充填材を充填することにより上梁部材と架構補強用面材の一体化が可能となっている。また、充填材は、前記既設梁柱架構と架構補強用面材との間隙に充填後、硬化することで両者を一体化することが可能であれば、限定されるものではなく、モルタルやグラウト材等の他、エポキシ樹脂系接着剤やウレタン樹脂系接着剤等を使用してもよい。 Further, the structure for joining the frame reinforcing face material to the existing beam column frame is formed by holding the upper beam member by the concave portion and in a joint portion formed between the concave portion and the upper beam member. It is characterized by filling and integrating the filler.
Here, holding means a state in which the upper beam member is inserted into the recess with a predetermined gap, and the upper beam member and the frame reinforcing surface material are integrated by filling the gap with a filler. Is possible. Further, the filler is not limited as long as it can be integrated by hardening after filling the gap between the existing beam column frame and the frame reinforcing face material, and is not limited to mortar or grout. In addition to materials, an epoxy resin adhesive, a urethane resin adhesive, or the like may be used.

かかる既設梁柱架構への架構補強用面材の接合構造は、施工時において、梁部材と凹部との目地部が開口された状態で充填材の充填を行うことが可能なため、当該開口部から、充填材の充填状況を確認しながら充填材の充填を隙間なく確実に行うことができるため、既設梁柱架構と架構補強用面材との接合を確実に行い、せん断力の伝達を行うことが可能となる。   The structure for joining the frame reinforcement face member to the existing beam column frame can be filled with the filler with the joint between the beam member and the concave portion opened at the time of construction. Therefore, the filling material can be filled without any gaps while confirming the filling status of the filling material, so that the existing beam column frame and the frame reinforcing surface material are securely joined and the shear force is transmitted. It becomes possible.

本発明の架構補強用面材及び架構補強用面材の接合構造によれば、充填材の充填を容易に確認することができ、かつ、必要な接着面積を確保することができるため、架構補強用面材と既設梁柱架構との間でのせん断力の伝達を確実に行い、耐震性が不十分であると判断された既設建物の補強を確実に行うことが可能となる。   According to the frame reinforcing face material and the structure of the frame reinforcing face material according to the present invention, the filling of the filler can be easily confirmed and the necessary bonding area can be secured. It is possible to reliably transmit the shearing force between the surface material and the existing beam column structure, and to reliably reinforce the existing building determined to have insufficient earthquake resistance.

本発明の好適な実施の形態について、図面を参照して説明する。なお、説明において、同一要素には同一の符号を用い、重複する説明は省略する。   Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

＜第１の実施の形態＞
本実施の形態では、既設建物の耐震強度を増加することを目的として、既設建物の各既設梁柱架構の内面に、架構補強面材である枠付補強架構を設置する場合について述べる。
図１は、本実施の形態にかかる枠付補強架構１０の全体を示す斜視図であり、図２は、枠付補強架構１０と上梁部材２２との接合部分を示す断面図である。なお、説明における前後左右は、図１に示した方向で統一するものとする。 <First Embodiment>
In this embodiment, for the purpose of increasing the seismic strength of an existing building, a case will be described in which a framed reinforcing frame, which is a frame reinforcing face material, is installed on the inner surface of each existing beam column frame of the existing building.
FIG. 1 is a perspective view showing the entire framed reinforcing frame 10 according to the present embodiment, and FIG. 2 is a cross-sectional view showing a joint portion between the framed reinforcing frame 10 and the upper beam member 22. In addition, front and rear, right and left in description shall be unified in the direction shown in FIG.

［構成］
既設梁柱架構２０は、左右に立設した柱部材２１（図１では右側の柱部材のみ記載）と、当該柱部材２１に横設されている上下の梁部材２２，２３とから形成されている。また、上下の梁部材２２，２３には、床部材２４（図１では下側の床部材のみ記載）が一体に接合されている。なお、本実施の形態では、上下の梁部材２２，２３ともにその前後の厚みが薄く、柱部材２１の厚みの１／３程度の既設建物について説明する。 [Constitution]
The existing beam column structure 20 is formed by a column member 21 (only the right column member is shown in FIG. 1) standing upright and left, and upper and lower beam members 22, 23 laid horizontally on the column member 21. Yes. A floor member 24 (only the lower floor member is shown in FIG. 1) is integrally joined to the upper and lower beam members 22 and 23. In the present embodiment, a description will be given of an existing building in which the upper and lower beam members 22 and 23 are thin in the front and rear, and about 1/3 of the thickness of the column member 21.

また、枠付補強架構１０は、鉄骨材により構成される四周の枠部材１１と、枠部材１１を補強するための鉄骨材であるブレース部材（枠補強部材）１６と、枠部材１１の上端前後に設置された断面がＬ字型形状の鋼板からなる立上げ鋼板（取付金具）１５とから構成されている。   The frame-equipped reinforcing frame 10 includes a four-round frame member 11 made of a steel frame material, a brace member (frame reinforcement member) 16 that is a steel frame material for reinforcing the frame member 11, and front and rear ends of the frame member 11. The cross section installed in is composed of a rising steel plate (mounting bracket) 15 made of an L-shaped steel plate.

枠部材１１は、Ｈ型鋼からなり、当該Ｈ型鋼のフランジ面が既設梁柱架構２０に当接するように、左右に立設された垂直部材１４と、垂直部材１４の上下端に横設された上下の水平部材１２，１３により長方形形状に形成されている。上下の水平部材１２，１３の左右端には、接合鋼板１７が、Ｈ型断面の開口面を閉塞して台形形状となるように取り付けられている。なお、下側水平部材１３の下梁部材２３と当接する側のフランジの幅は、下梁部材２３の前後の厚みよりも所定の長さだけ広い幅として、枠付補強架構１０と既設梁柱架構２０との一体化に必要とされる接着面積が確保される構成とする。また、枠部材１１の材料としては、枠付補強架構１０に必要とされる耐力を発現することが可能であれば、Ｈ型鋼に限定されるものではない。   The frame member 11 is made of H-shaped steel, and is vertically installed on the left and right vertical members 14 and the upper and lower ends of the vertical member 14 so that the flange surface of the H-shaped steel comes into contact with the existing beam column frame 20. The upper and lower horizontal members 12 and 13 are formed in a rectangular shape. Bonded steel plates 17 are attached to the left and right ends of the upper and lower horizontal members 12 and 13 so as to close the opening surface of the H-shaped cross section and have a trapezoidal shape. Note that the width of the flange on the side in contact with the lower beam member 23 of the lower horizontal member 13 is set to a width wider than the front and rear thicknesses of the lower beam member 23 by a predetermined length, so that the framed reinforcing frame 10 and the existing beam column A bonding area required for integration with the frame 20 is secured. Further, the material of the frame member 11 is not limited to the H-shaped steel as long as the proof stress necessary for the frame-equipped reinforcing frame 10 can be expressed.

図２に示すように、立上げ鋼板１５は、上側水平部材１２の上梁部材２２側の上フランジ１２ａの前後方向（面外方向）の両端部に溶接接合されており、前後の立上げ鋼板１５，１５と上フランジ１２ａの上面とにより、凹部３０が形成されるように構成されている。立上げ鋼板１５は、厚さが上フランジ１２ａの厚さと同程度で、長さは上側水平部材１２の左右延長と同じ長さを有し、さらに高さは、上側水平部材１２の上面と上梁部材２２下面との接着面に当該立上げ鋼板１５，１５の接着面積を加えることにより、上梁部材２２と枠付補強架構１０との一体化に必要な接着面積が確保できる所望の高さを有した鋼板から構成されている。また、前後の立上げ鋼板１５の上端の間隔は、既設梁柱架構２０の上梁部材２２の幅よりも広く、枠付補強架構１０を既設梁柱架構２０の内面に設置した状態で、上梁部材２２の前後と立上げ鋼板１５の上端との間に所定の開口部３２が形成される（図２参照）。   As shown in FIG. 2, the upright steel plate 15 is welded to both ends in the front-rear direction (out-of-plane direction) of the upper flange 12 a on the upper beam member 22 side of the upper horizontal member 12. 15 and 15 and the upper surface of the upper flange 12a are configured such that a recess 30 is formed. The rising steel plate 15 has the same thickness as the upper flange 12a, has the same length as the left and right extension of the upper horizontal member 12, and has a height higher than that of the upper surface of the upper horizontal member 12. Desired height that can secure a bonding area required for the integration of the upper beam member 22 and the framed reinforcing frame 10 by adding the bonding area of the raised steel plates 15 and 15 to the bonding surface with the lower surface of the beam member 22 It is comprised from the steel plate which has. Further, the distance between the upper ends of the front and rear rising steel plates 15 is wider than the width of the upper beam member 22 of the existing beam column frame 20, and the upper frame member 20 is installed on the inner surface of the existing beam column frame 20. A predetermined opening 32 is formed between the front and rear of the beam member 22 and the upper end of the raised steel plate 15 (see FIG. 2).

そして、上側水平部材１２の上下のフランジ１２ａ，１２ｂの間には、立上げ鋼板１５の変形を抑止するリブプレート（凹部補強部材）１５ａが所定の間隔を有して設置されている。リブプレート１５ａは、上辺の長さが上側水平部材１２のウェブ１２ｃから立上げ鋼板１５の折れ曲げ点までの長さであり、一方の下辺の長さはウェブ１２ｃから下フランジ１２ｂ先端までの長さであり、また高さはウェブ１２ｃの高さと同等の台形形状の鋼板からなる。   Between the upper and lower flanges 12a and 12b of the upper horizontal member 12, a rib plate (concave reinforcing member) 15a that suppresses deformation of the rising steel plate 15 is provided with a predetermined interval. In the rib plate 15a, the length of the upper side is the length from the web 12c of the upper horizontal member 12 to the bending point of the raised steel plate 15, and the length of the lower side is the length from the web 12c to the tip of the lower flange 12b. Further, the height is made of a trapezoidal steel plate equivalent to the height of the web 12c.

なお、立上げ鋼板１５の形状寸法は、上梁部材２２と枠付補強架構１０の接合に必要な接着強度及び剛性を確保できるように、想定される応力に応じて適宜調整する。また、リブプレート１５ａの取り付け方法も限定されるものではなく、例えば、溶接接合により行うなど、適宜選定して行う。さらに、リブプレート１５ａの設置間隔及び箇所数は、立上げ鋼板１５の耐力と立上げ鋼板１５に加わる応力との関係から随時設定されるものとする。   In addition, the shape dimension of the upright steel plate 15 is suitably adjusted according to the assumed stress so that the adhesive strength and rigidity necessary for joining the upper beam member 22 and the framed reinforcing frame 10 can be secured. Moreover, the attachment method of the rib plate 15a is not limited, For example, it selects suitably, such as performing by welding joining. Further, the installation interval and the number of locations of the rib plate 15a are set as needed from the relationship between the proof stress of the rising steel plate 15 and the stress applied to the rising steel plate 15.

ブレース部材１６は、枠部材１１の一方の角から対角に向かって斜め方向に配設される部材である。ここで、ブレース部材１６と枠部材１１との接合は、溶接により行う。なお、本実施の形態では、ブレース部材１６を１本のＨ型鋼により構成するものとしたが、これに限定されるものではなく、例えば、ダンパー付ブレースを使用しても良い。また、ブレース部材１６を枠部材１１の対角線状に１本配設するものとしたが、これに限定されるものではなく、ブレース部材１６に必要とされる強度や枠付補強架構１０の設置箇所の使用目的により、いわゆるＫ型ブレース工法、Ｖ型ブレース工法、Ｘ型ブレース工法等の構成としてもよい。   The brace member 16 is a member disposed in an oblique direction from one corner of the frame member 11 to the diagonal. Here, the brace member 16 and the frame member 11 are joined by welding. In the present embodiment, the brace member 16 is composed of one H-shaped steel. However, the present invention is not limited to this, and for example, a brace with a damper may be used. In addition, one brace member 16 is disposed diagonally to the frame member 11, but the present invention is not limited to this, and the strength required for the brace member 16 and the installation location of the framed reinforcing frame 10 are not limited thereto. Depending on the purpose of use, a so-called K-type brace method, V-type brace method, X-type brace method, or the like may be used.

枠付補強架構１０は、上側水平部材１２の上面に形成された凹部３０により所定の間隙３１を有して上梁部材２２を抱持するとともに（図２参照）、下梁部材２３と下側水平部材１３との間にも所定の間隙を有して設置される。そして、これらの枠付補強架構１０と既設梁柱架構２０との間に形成された各間隙に充填材を充填することにより枠付補強架構１０と既設梁柱架構２０との一体化を図っている。ここで、左右の柱部材２１，２１と左右の垂直部材１４との当接部に関しては、必要に応じて充填を行い、接合を行うものとする。   The frame-equipped reinforcing frame 10 holds the upper beam member 22 with a predetermined gap 31 by a recess 30 formed on the upper surface of the upper horizontal member 12 (see FIG. 2), and the lower beam member 23 and the lower side It is also installed between the horizontal member 13 with a predetermined gap. Then, by filling the gaps formed between the framed reinforcement frame 10 and the existing beam column frame 20 with a filler, the framed reinforcement frame 10 and the existing beam column frame 20 are integrated. Yes. Here, the contact portions between the left and right column members 21 and 21 and the left and right vertical members 14 are filled and bonded as necessary.

なお、凹部３０への充填材の注入は、立上げ鋼板１５の上端と上梁部材２２との間に形成された開口部３２から行うものとし、開口部３２から充填状況を確認しながら、上梁部材２２の側面の所定の位置に充填材が上昇するまで行う。一方、枠付補強架構１０と左右の柱部材２１，２１及び下梁部材２３との間隙への充填材の注入は、充填材注入用の図示しない型枠を、当該間隙を閉塞するように間隙の前後に設置した上で行う。この時、型枠には上方に空気抜き孔が設けられており、この空気抜き孔から充填材が流出することで、充填が完了する。ここで、間隙に充填する充填材の材質は、限定されるものではなく、例えばエポキシ樹脂等の接着剤やセメント系充填材、若しくはこれ等を組み合わせて充填する等、適宜選定して使用するものとする。   The filling material is injected into the concave portion 30 from the opening 32 formed between the upper end of the upright steel plate 15 and the upper beam member 22. This is performed until the filler rises to a predetermined position on the side surface of the beam member 22. On the other hand, the filler is injected into the gap between the frame-equipped reinforcing frame 10 and the left and right column members 21 and 21 and the lower beam member 23 so that a mold frame (not shown) for filling the filler is closed to close the gap. It is done after installing before and after. At this time, the mold is provided with an air vent hole on the upper side, and filling is completed when the filler flows out from the air vent hole. Here, the material of the filler to be filled in the gap is not limited. For example, an adhesive such as an epoxy resin, a cement-type filler, or a combination of these is selected and used. And

［作用及び効果］
本発明による枠付補強架構１０は、予め上方に凹部３０が形成されており、この凹部３０を利用して充填材の注入を行うため、上梁部材２２と上側水平部材１２との間隙３１を密封する必要がなく、型枠作業の手間が省けるため、工期の短縮が可能となる。 [Action and effect]
The framed reinforcing frame 10 according to the present invention has a concave portion 30 formed in the upper portion in advance, and a gap 31 between the upper beam member 22 and the upper horizontal member 12 is formed in order to inject the filler using the concave portion 30. Since it is not necessary to seal and the labor of the formwork can be saved, the construction period can be shortened.

また、上梁部材２２と上側水平部材１２との間隙３１への充填材の注入に関して、充填材を上方から充填材の自重により注入し、上梁部材２２の前後側面の所定の高さに充填材が上昇するまで行うため、確実に上梁部材２２の直下への充填を行うことができる。   Further, regarding the injection of the filler into the gap 31 between the upper beam member 22 and the upper horizontal member 12, the filler is injected from above by the weight of the filler, and filled to a predetermined height on the front and rear side surfaces of the upper beam member 22. Since it is performed until the material rises, it is possible to reliably fill the upper beam member 22 directly below.

また、充填材の注入作業時には、上梁部材２２の側面と立上げ鋼板１５との間に開口部３２が形成されているため、充填状況の確認をしながら確実に充填することが可能となる。そのため、打音調査による充填の確認の必要がなく、手間が省けるとともに、打音による騒音を発することがないため、供用中の建物の補強工事にも有効である。   Moreover, since the opening part 32 is formed between the side surface of the upper beam member 22 and the upright steel plate 15 at the time of the filling material injection operation, the filling can be surely performed while checking the filling state. . Therefore, it is not necessary to confirm the filling by a hitting sound investigation, and it is possible to save time and noise from the hitting sound. Therefore, it is also effective for the reinforcement work of the building in service.

また、梁の厚みが薄く、梁の下面のみでは必要とされる接着面積が確保できないような既設建物に関しても、上梁部材２２の側面の所定の位置まで充填材を注入して接着するため、所望の接着面積を確保することが可能となる。   In addition, for an existing building where the thickness of the beam is thin and the required adhesion area cannot be ensured only by the lower surface of the beam, in order to inject the filler to a predetermined position on the side surface of the upper beam member 22, A desired bonding area can be secured.

また、凹部３０の構成も、従来の枠付補強架構１０の上側水平部材１２の上フランジ１２ａの両端に立上げ鋼板１５を溶接して立設するのみのため、枠付補強架構１０の製造において、特別な手間を要することなく製造することが可能である。なお、この構成により凹部３０は、上フランジ１２ａと前後の立上げ鋼板１５とが一体となって、上梁部材２２に直接接合されているため、既設梁柱架構２０と枠付補強架構１０との接合部において発生する各種応力が、当該凹部３０の一部に集中することなく、直接枠付補強架構１０に伝達されることが可能となる。また、上フランジ１２ａの両端の固定点Ａ，Ａにおいて立上げ鋼板１５を溶接する構成のため、両固定点Ａ，Ａの固定幅ｘが比較的広く、面外方向（前後方向）への回転に対する固定度が高い構成となる。   In addition, since the concave portion 30 is also constructed by welding the upright steel plates 15 to both ends of the upper flange 12a of the upper horizontal member 12 of the conventional framed reinforcing frame 10, the framed reinforcing frame 10 is manufactured. It is possible to manufacture without requiring special trouble. With this configuration, since the upper flange 12a and the front and rear raised steel plates 15 are integrated and directly joined to the upper beam member 22, the concave portion 30 has the existing beam column frame 20 and the framed reinforcing frame 10 Various stresses generated in the joint portion can be directly transmitted to the frame-equipped reinforcing frame 10 without being concentrated on a part of the concave portion 30. Further, since the rising steel plate 15 is welded at the fixing points A and A at both ends of the upper flange 12a, the fixing width x of both the fixing points A and A is relatively wide, and rotation in the out-of-plane direction (front-rear direction). The degree of fixation with respect to is high.

また、枠付補強架構１０は、その上側水平部材１２の上面前後に立設された立上げ鋼板１５により上梁部材２２を抱持しているため、枠付補強架構１０と既設梁柱架構２０との一体化が成される前であっても、立上げ鋼板１５により枠付補強架構１０が倒れることを防止し、安全性が確保される。   Further, the framed reinforcing frame 10 holds the upper beam member 22 by the upright steel plates 15 erected before and after the upper surface of the upper horizontal member 12, so the framed reinforcing frame 10 and the existing beam column frame 20. Even before the integration is established, the rising steel plate 15 prevents the framed reinforcing frame 10 from falling down, and safety is ensured.

さらに、立上げ鋼板１５の変形を抑止するリブプレート１５ａを有しているため、立上げ鋼板１５に大きな負荷が加わった場合でも、立上げ鋼板１５に加わる応力を当該リブプレート１５ａが吸収して変形することがなく、枠付補強架構１０と既設梁柱架構２０とが分離することがない。したがって、例えば充填材の注入により、立上げ鋼板１５の上端が、フランジ１２ａとの接合部を軸として、前後に広がるような応力が加わった場合でも、立上げ鋼板１５の下部をリブプレート１５ａが支えているため、それを抑止することができる。なお、リブプレート１５ａの形状は台形に限定されるものではなく、例えば、立上げ鋼板１５の前後まで覆うことが可能な形状であればさらに強固に立上げ鋼板１５の変形を抑止することが可能であり、状況に応じて適宜設定すればよい。また、立上げ鋼板１５の補強として、立上げ鋼板１５の隅角部の内側に、三角形状の鋼板からなる三角リブ１５ｂを配設する場合があり、この構成により、立上げ鋼板１５が前後へ広がることを抑止するとともに、この三角リブ１５ｂがシアーキーの役目も果たし、枠部材１１の表面でのすべりを防止することが可能となる。   Furthermore, since the rib plate 15a that suppresses the deformation of the rising steel plate 15 is provided, even when a large load is applied to the rising steel plate 15, the rib plate 15a absorbs the stress applied to the rising steel plate 15. There is no deformation, and the framed reinforcing frame 10 and the existing beam column frame 20 are not separated. Therefore, for example, even when a stress is applied to the upper end of the rising steel plate 15 that spreads back and forth around the joint with the flange 12a by injection of a filler, the lower portion of the rising steel plate 15 is formed by the rib plate 15a. Because it supports, it can be suppressed. In addition, the shape of the rib plate 15a is not limited to a trapezoid, and for example, if the shape can cover the front and back of the rising steel plate 15, the deformation of the rising steel plate 15 can be further suppressed. It may be set as appropriate according to the situation. Further, as a reinforcement of the rising steel plate 15, a triangular rib 15 b made of a triangular steel plate may be disposed inside the corner portion of the rising steel plate 15. With this configuration, the rising steel plate 15 is moved back and forth. The triangular ribs 15b also serve as a shear key, and can prevent slipping on the surface of the frame member 11 while suppressing the spreading.

＜第２の実施の形態＞
図３は、第２の実施の形態に係る、枠付補強架構と梁部材との接合部分を示す側面図である。 <Second Embodiment>
FIG. 3 is a side view showing a joint portion between a framed reinforcing frame and a beam member according to the second embodiment.

第２の実施の形態に係る枠付補強架構１０’は、図３に示すように、上側水平部材１２の上フランジ１２ａにコの字型断面を有する立上げ鋼材（取付金具）１５’を、その開口面が上側に向くように設置することにより、凹部３０を形成し上梁部材２２を抱持することを可能とする構成である。   As shown in FIG. 3, the framed reinforcing frame 10 ′ according to the second embodiment includes a rising steel material (mounting bracket) 15 ′ having a U-shaped cross section on the upper flange 12 a of the upper horizontal member 12, By installing so that the opening surface faces upward, the recess 30 is formed and the upper beam member 22 can be held.

ここで、立上げ鋼材１５’は、上フランジ１２ａの前後方向（面外方向）両端部において溶接接合されて、枠部材１１と強固に一体となっている。したがって、立上げ鋼板１５’は、上フランジ１２ａの面により支えられているため、地震等により当該凹部３０に加わる応力は、上フランジ１２ａの面で吸収し、枠付補強架構１０’に伝達され、既設梁柱架構２０の補強が可能となっている。   Here, the raised steel material 15 ′ is welded to both ends of the upper flange 12 a in the front-rear direction (out-of-plane direction) and is firmly integrated with the frame member 11. Therefore, since the rising steel plate 15 ′ is supported by the surface of the upper flange 12a, the stress applied to the concave portion 30 due to an earthquake or the like is absorbed by the surface of the upper flange 12a and transmitted to the framed reinforcing frame 10 ′. The existing beam column 20 can be reinforced.

なお、第２の実施の形態に係る枠付補強架構１０'のその他の構成及び既設梁柱架構２０への接合構造は、第１の実施の形態と同様なため、詳細な説明は省略する。また、第２の実施の形態に係る枠付補強架構１０’とその接合構造による作用及び効果についても、第１の実施の形態と同様なため、詳細な説明は省略する。   In addition, since the other structure of frame reinforcement frame 10 'concerning 2nd Embodiment and the joining structure to the existing beam pillar frame 20 are the same as that of 1st Embodiment, detailed description is abbreviate | omitted. Further, the operation and effect of the framed reinforcing frame 10 'according to the second embodiment and the joint structure thereof are also the same as those in the first embodiment, and thus detailed description thereof is omitted.

以上、本発明について、好適な実施形態の例を説明した。しかし、本発明は、前記実施形態に限られず、前記の各構成要素については、本発明の趣旨を逸脱しない範囲で、適宜設計変更が可能である。
例えば、本実施の形態では、ブレース部材を有する枠付補強架構を架構補強用面材として使用するものとしたが、これに限定されるものではなく、例えば、鉄板パネルにより架構補強用面材を形成する等、架構補強用面材の構成は、状況に応じて適宜決定されることはいうまでもない。 Heretofore, examples of preferred embodiments have been described for the present invention. However, the present invention is not limited to the above-described embodiment, and the design of each of the above-described components can be appropriately changed without departing from the spirit of the present invention.
For example, in the present embodiment, a framed reinforcing frame having a brace member is used as a frame reinforcing surface material. However, the present invention is not limited to this. For example, the frame reinforcing surface material is formed by an iron plate panel. Needless to say, the structure of the frame reinforcing face material such as forming is appropriately determined according to the situation.

また、凹部を上側水平部材の全延長について形成するものとしたが、枠付補強架構と既設梁柱架構との接着に必要な強度を発現することが可能であれば、部分的に形成するものとしてもよい。
また、上梁部材に対して、上側水平部材に凹部を形成して枠付補強架構を取り付けるものとしたが、必要に応じて左右の垂直部材や下側水平部材に凹部を形成し、柱部材や下梁部材を抱持して接着する構成としてもよい。 In addition, the concave portion is formed for the entire extension of the upper horizontal member. However, the concave portion is partially formed if the strength necessary for adhesion between the framed reinforcing frame and the existing beam column frame can be expressed. It is good.
In addition, the upper beam member is formed with a recess in the upper horizontal member and the framed reinforcing frame is attached. However, if necessary, the left and right vertical members and the lower horizontal member are formed with recesses to form a column member. It is also possible to hold and bond the lower beam member.

さらに、本実施の形態では、枠部材として、上下の水平部材と左右の垂直部材により長方形に形成されたものを使用するものとしたが、枠部材の形状は、長方形に限定されるものではなく、例えば、ハンチを有する形状とする等、既設梁柱架構の形状に応じて適宜形成される。   Furthermore, in the present embodiment, the frame member is a rectangle formed by the upper and lower horizontal members and the left and right vertical members. However, the shape of the frame member is not limited to the rectangle. For example, it is appropriately formed according to the shape of the existing beam column frame such as a shape having a haunch.

第１の実施の形態に係る枠付補強架構の全体を示す斜視図である。It is a perspective view showing the whole framed reinforcement frame concerning a 1st embodiment. 第１の実施の形態に係る枠付補強架構と梁部材との接合部分を示す側面図である。It is a side view which shows the junction part of the reinforcement frame with a frame which concerns on 1st Embodiment, and a beam member. 第２の実施の形態に係る枠付補強架構と梁部材との接合部分を示す側面図である。It is a side view which shows the junction part of the reinforcement frame with a frame concerning 2nd Embodiment, and a beam member. 従来の枠付補強架構の既設梁柱架構への取り付け状況を示す断面図であり、（ａ）はアンカー工法を示し、（ｂ）は接着工法を示す。It is sectional drawing which shows the attachment condition to the existing beam column frame of the conventional framed reinforcement frame, (a) shows an anchor construction method, (b) shows an adhesion construction method. 従来の鋼製ブロック壁の既設梁柱架構への取り付け状況を示す断面図である。It is sectional drawing which shows the attachment condition to the existing beam pillar frame of the conventional steel block wall.

符号の説明Explanation of symbols

１０ 枠付補強架構（架構補強用面材）
１１ 枠部材
１２ 上側水平部材
１５ 立上げ鋼板（取付金具）
１５ａ リブプレート（凹部補強部材）
１６ ブレース部材（枠補強部材）
２０ 既設梁柱架構
２１ 柱部材
２２ 上梁部材
２３ 下梁部材
３０ 凹部
３１ 間隙
３２ 開口部 10 Reinforced frame with frame (face material for frame reinforcement)
11 Frame member 12 Upper horizontal member 15 Rising steel plate (mounting bracket)
15a Rib plate (recessed reinforcing member)
16 Brace member (frame reinforcement member)
20 Existing beam column structure 21 Column member 22 Upper beam member 23 Lower beam member 30 Concave portion 31 Gap 32 Opening portion

Claims (3)

両側に立設した柱部材と当該両側の柱部材に横設されている上下の梁部材とから形成されている既設梁柱架構の内面に設置される架構補強用面材であって、
前記既設梁柱架構の内面形状に合せて形成された枠部材と、前記枠部材を補強するための枠補強部材と、を備え、
前記枠部材の上面には、前記上梁部材を抱持する凹部を形成する取付金具が、前記枠部材の面外方向の両端部で固定されていることを特徴とする、架構補強用面材。 A frame reinforcing surface material installed on the inner surface of an existing beam column structure formed of column members standing on both sides and upper and lower beam members horizontally disposed on both side column members,
A frame member formed in accordance with the inner surface shape of the existing beam column structure, and a frame reinforcing member for reinforcing the frame member,
A frame reinforcing surface material, characterized in that, on the upper surface of the frame member, mounting brackets that form recesses for holding the upper beam member are fixed at both ends in the out-of-plane direction of the frame member. . 前記枠部材には、前記凹部を形成する前記取付金具の変形を抑止するための、凹部補強部材が備えられていることを特徴とする、請求項１に記載の架構補強用面材。   2. The frame reinforcing face material according to claim 1, wherein the frame member is provided with a recessed portion reinforcing member for suppressing deformation of the mounting bracket forming the recessed portion. 前記既設梁柱架構と、前記既設梁柱架構の内面に設置される請求項１又は請求項２に記載の架構補強用面材との接合構造であって、
前記凹部により前記上梁部材を抱持し、且つ前記凹部と前記上梁部材との間に形成された間隙に充填材を充填して一体化することを特徴とする、架構補強用面材の接合構造。 The joint structure between the existing beam column frame and the frame reinforcing face material according to claim 1 or 2 installed on an inner surface of the existing beam column frame,
The frame reinforcing surface material is characterized in that the upper beam member is held by the concave portion, and a gap formed between the concave portion and the upper beam member is filled and integrated. Junction structure.
JP2004033147A 2004-02-10 2004-02-10 Frame reinforcement and its joint structure Expired - Fee Related JP4146808B2 (en)

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JP4759301B2 (en) * 2005-04-01 2011-08-31 大成建設株式会社 Seismic reinforcement method for buildings
JP4719119B2 (en) * 2006-10-04 2011-07-06 三菱重工業株式会社 Seismic retrofitting method for existing building structures
JP2012031615A (en) * 2010-07-29 2012-02-16 Shimizu Corp Seismic strengthening structure
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JP6362988B2 (en) * 2014-10-09 2018-07-25 株式会社竹中工務店 Seismic reinforcement frame
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