JP6610924B2 - Seismic reinforcement structure and seismic reinforcement method - Google Patents

Seismic reinforcement structure and seismic reinforcement method Download PDF

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JP6610924B2
JP6610924B2 JP2015135146A JP2015135146A JP6610924B2 JP 6610924 B2 JP6610924 B2 JP 6610924B2 JP 2015135146 A JP2015135146 A JP 2015135146A JP 2015135146 A JP2015135146 A JP 2015135146A JP 6610924 B2 JP6610924 B2 JP 6610924B2
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cotter
enclosure
seismic reinforcement
reinforcing
shear
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JP2017014857A (en
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勝義 山本
初太郎 田中
大吾 石井
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Shimizu Corp
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Description

本発明は、耐震補強構造及び耐震補強方法に関するものである。   The present invention relates to a seismic reinforcement structure and a seismic reinforcement method.

従来から、既存の建築物の柱や梁等の構造体にブレースを取付けて耐震補強することが広く行われている。現場で、鉄骨等の構造体にブレースを溶接により取り付けると火花が発生するため、他の接合方法が好まれることがある。   2. Description of the Related Art Conventionally, it has been widely practiced to attach a brace to a structure such as a pillar or a beam of an existing building for earthquake resistance reinforcement. When a brace is attached to a structure such as a steel frame by welding at the site, a spark is generated, so that other joining methods may be preferred.

そこで、ブレースの端部に設けられた芯材が、柱と梁との接合部に設けられたプレートにボルトで接合された構成が提案されている(下記特許文献1参照)。
また、斜材の端部に設けられたガセットプレートが、H型鋼や角柱により形成された柱の対向する面にそれぞれ接着剤で接着されるとともに、接着剤の剥離を防止するために対向するガセットプレート同士をボルトで螺合した構成が提案されている(下記特許文献2参照)。
Therefore, a configuration has been proposed in which the core material provided at the end of the brace is joined to the plate provided at the joint between the column and the beam by a bolt (see Patent Document 1 below).
In addition, the gusset plates provided at the ends of the diagonal members are respectively bonded to the opposing surfaces of the columns formed by H-shaped steel or prismatic columns with adhesives, and opposed gussets to prevent the peeling of the adhesives A configuration in which plates are screwed together with bolts has been proposed (see Patent Document 2 below).

特開2013−241815号公報JP2013-241815A 特開2013−177797号公報JP 2013-177797 A

しかしながら、上記の特許文献1に記載された構成では、構造体が鋼管で構成されている場合には、鋼管にはフランジ等の延出する部材がないため、鋼管に補強部材をボルトで接合することが困難であるという問題点がある。
また、上記の特許文献2に記載された構成では、ガセットプレートを柱に接着剤で接着するとともに、ガセットプレート同士をボルトで螺合するため、手間がかかるという問題点がある。
However, in the configuration described in Patent Document 1, when the structure is formed of a steel pipe, the steel pipe has no extending member such as a flange, and therefore, the reinforcing member is joined to the steel pipe with a bolt. There is a problem that it is difficult.
Moreover, in the structure described in said patent document 2, while attaching a gusset plate to a pillar with an adhesive agent and screwing together a gusset plate with a volt | bolt, there exists a problem that it takes an effort.

そこで、本発明は、上記事情に鑑みてなされたものであり、鋼管で形成される構造体に溶接を用いないで、補強部材を固定する耐震補強構造及び耐震補強方法を提供する。   Then, this invention is made | formed in view of the said situation, and provides the earthquake-proof reinforcement structure and the earthquake-proof reinforcement method which fix a reinforcement member, without using welding for the structure formed with a steel pipe.

上記目的を達成するために、本発明は以下の手段を採用している。
すなわち、本発明に係る耐震補強構造は、鋼管で形成された構造体と、該構造体の外面に取り付けられたコッターと、筒状に形成され、前記コッターの外側に前記構造体を囲うように配置された囲い部材と、該囲い部材の内面に沿って設けられ、前記コッターとの間で圧縮力を生じさせるシアー鉄筋と、前記囲い部材から外側に延出する延出部と、前記構造体と前記囲い部材との間に充填され、前記コッターを介して前記構造体と一体化された充填部と、前記延出部にボルトで固定された補強部材と、を備え、前記コッターと前記シアー鉄筋との間には、前記圧縮力が斜め方向に作用することを特徴とする。
In order to achieve the above object, the present invention employs the following means.
That is, the seismic reinforcement structure according to the present invention is formed in a steel tube, a cotter attached to the outer surface of the structure, and formed in a cylindrical shape so as to surround the structure outside the cotter. An enclosure member that is disposed; a shear reinforcing bar that is provided along an inner surface of the enclosure member and that generates a compressive force between the cotter; an extending portion that extends outward from the enclosure member; and the structure. And a filling member integrated with the structure via the cotter, and a reinforcing member fixed to the extension part with a bolt, the cotter and the shear The compressive force acts in an oblique direction between the reinforcing bars .

このように構成された耐震補強構造では、鋼管で構成された構造体と囲い部材との間には、構造体の外面に取り付けられたコッターを介して構造体と一体化された充填部が形成されている。また、囲い部材は、充填部と一体化されている。換言すると、囲い部材は、コッター及び充填部を介して、構造体と一体化されている。また、囲い部材から外側に延出する延出部には、補強部材がボルトで固定されている。よって、構造体が鋼管で形成されていても、補強部材を、構造体と一体化された囲い部材から外側に延出する延出部に、溶接を用いずにボルトで固定することができる。
さらに、囲い部材の内面に沿って設けられたシアー鉄筋は、コッターとの間で圧縮力(圧縮ストラット)を生じさせ、構造体と補強部材との間で軸力や曲げ応力を伝達することができる。
In the seismic reinforcement structure configured as described above, a filling portion integrated with the structure is formed between the structure configured by the steel pipe and the surrounding member via a cotter attached to the outer surface of the structure. Has been. Moreover, the surrounding member is integrated with the filling part. In other words, the surrounding member is integrated with the structure via the cotter and the filling portion. Moreover, the reinforcement member is being fixed with the volt | bolt at the extension part extended outside from the enclosure member. Therefore, even if the structure is formed of a steel pipe, the reinforcing member can be fixed to the extending portion extending outward from the enclosure member integrated with the structure with a bolt without using welding.
Furthermore, the shear rebar provided along the inner surface of the enclosure member generates a compressive force (compression strut) between the cotter and can transmit axial force and bending stress between the structure and the reinforcing member. it can.

また、本発明に係る耐震補強構造は、前記構造体の外縁は、平面視円形に形成され、前記囲い部材の内面には、回転防止部が設けられていることが好ましい。   In the seismic reinforcement structure according to the present invention, it is preferable that an outer edge of the structure is formed in a circular shape in plan view, and an anti-rotation portion is provided on the inner surface of the enclosure member.

このように構成された耐震補強構造では、構造体の外縁が平面視円形に形成されていても、囲い部材の内面には回転防止部が設けられている。よって、囲い部材に設けられた回転防止部が充填部に埋め込まれて、囲い部材と充填部との間に生じる摩擦力が大きくなるため、囲い部材が充填部に対して相対的に周方向にずれることがない。よって、補強部材を位置ずれなく固定することができる。   In the seismic reinforcement structure configured as described above, the rotation preventing portion is provided on the inner surface of the enclosure member even if the outer edge of the structure is circular in plan view. Therefore, since the rotation prevention part provided in the enclosure member is embedded in the filling part and the frictional force generated between the enclosure member and the filling part is increased, the enclosure member is relatively circumferential with respect to the filling part. There is no deviation. Therefore, the reinforcing member can be fixed without misalignment.

また、本発明に係る耐震補強構造は、前記コッターは、前記構造体に螺子または接着剤により取り付けられていてもよい。   In the earthquake-proof reinforcement structure according to the present invention, the cotter may be attached to the structure body with a screw or an adhesive.

このように構成された耐震補強構造では、コッターを螺子または接着剤により簡易に取り付けることができる。   In the seismic reinforcement structure configured as described above, the cotter can be easily attached with a screw or an adhesive.

また、本発明に係る耐震補強方法は、鋼管で形成された構造体の外面に、コッターを固定するコッター固定工程と、筒状に形成されるとともに外側に延出する延出部が設けられた囲い部材を、前記コッターの外側に前記構造体を囲うように配置する囲い部材配置工程と、前記囲い部材の内面に沿って、前記コッターとの間で圧縮力を生じさせるシアー鉄筋を配置するシアー鉄筋配置工程と、前記構造体と前記囲い部材との間に充填材を充填して、前記コッターを介して前記構造体と前記囲い部材とを一体化する充填工程と、前記延出部に補強部材をボルトで固定する補強部材固定工程と、を備え、前記コッターと前記シアー鉄筋との間には、前記圧縮力が斜め方向に作用することを特徴とする。
Moreover, the seismic strengthening method according to the present invention is provided with a cotter fixing step for fixing a cotter and an extending portion that is formed in a tubular shape and extends outward on the outer surface of a structure formed of a steel pipe. An enclosure member arranging step of arranging an enclosure member so as to enclose the structure outside the cotter, and a shear reinforcing bar that generates a compressive force between the cotter and the inner surface of the enclosure member. Reinforcing bar arrangement step, filling step of filling the filler between the structure and the enclosure member, and integrating the structure and the enclosure member via the cotter, and reinforcing the extension A reinforcing member fixing step of fixing the member with a bolt , wherein the compressive force acts in an oblique direction between the cotter and the shear reinforcing bar .

このように構成された耐震補強方法では、コッター固定工程により、鋼管で形成された構造体の外面に、コッターを固定する。囲い部材配置工程により、筒状に形成されるとともに外側に延出する延出部が設けられた囲い部材を、コッターの外側に構造体を囲うように配置する。シアー鉄筋配置工程により、囲い部材の内面に沿って、コッターとの間で圧縮力を生じさせるシアー鉄筋を配置する。充填工程により、構造体と囲い部材との間に充填材を充填して、コッターを介して構造体と囲い部材とを一体化する。補強部材固定工程により、延出部に補強部材をボルトで固定する。よって、構造体が鋼管で形成されていても、補強部材を、構造体と一体化された囲い部材から外側に延出する延出部に、溶接を用いずにボルトで固定することができる。
さらに、囲い部材の内面に沿って設けられたシアー鉄筋は、コッターとの間で圧縮力(圧縮ストラット)を生じさせ、構造体と補強部材との間で軸力や曲げ応力を伝達することができる。
In the seismic reinforcement method thus configured, the cotter is fixed to the outer surface of the structure formed of the steel pipe by the cotter fixing step. In the enclosing member arrangement step, the enclosing member that is formed in a cylindrical shape and provided with an extending portion that extends outward is arranged so as to surround the structure outside the cotter. A shear reinforcing bar that generates a compressive force with the cotter is arranged along the inner surface of the enclosure member by the shear reinforcing bar arranging step. In the filling step, a filler is filled between the structure and the surrounding member, and the structure and the surrounding member are integrated via a cotter. In the reinforcing member fixing step, the reinforcing member is fixed to the extending portion with a bolt. Therefore, even if the structure is formed of a steel pipe, the reinforcing member can be fixed to the extending portion extending outward from the enclosure member integrated with the structure with a bolt without using welding.
Furthermore, the shear rebar provided along the inner surface of the enclosure member generates a compressive force (compression strut) between the cotter and can transmit axial force and bending stress between the structure and the reinforcing member. it can.

本発明に係る耐震補強構造及び耐震補強方法によれば、鋼管で形成される構造体に溶接を用いないで、補強部材を固定することができる。   According to the seismic reinforcing structure and the seismic reinforcing method according to the present invention, the reinforcing member can be fixed without using welding to the structure formed of the steel pipe.

本発明の一実施形態に係る鋼管部材と補強部材との接合構造が採用された建築物の部分的な正面図である。It is a partial front view of the building where the joining structure of the steel pipe member and reinforcement member concerning one embodiment of the present invention was adopted. 図1のA−A断面図である。It is AA sectional drawing of FIG. 図2のB−B断面図である。It is BB sectional drawing of FIG. コッターとシアー鉄筋との間で生じる圧縮力(圧縮ストラット)を説明するための断面の模式図であり、(a)は通常時、(b)は地震時等を示す。It is a schematic diagram of the cross section for demonstrating the compressive force (compression strut) which arises between a cotter and a shear reinforcement, (a) is normal time, (b) shows the time of an earthquake, etc.

本発明の一実施形態に係る耐震補強構造について、図面を用いて説明する。
図1は、本発明の一実施形態に係る鋼管部材と補強部材との接合構造が採用された建築物の部分的な正面図である。
The earthquake-proof reinforcement structure which concerns on one Embodiment of this invention is demonstrated using drawing.
FIG. 1 is a partial front view of a building in which a joining structure of a steel pipe member and a reinforcing member according to an embodiment of the present invention is employed.

図1に示すように、耐震補強の対象とされる既存の建築物1は、柱(構造体)11と、トラス部12と、屋根13と、を備えている。   As shown in FIG. 1, an existing building 1 to be subjected to seismic reinforcement includes a column (structure) 11, a truss portion 12, and a roof 13.

柱11は、鋼管で例えば円筒状に形成され、鉛直方向に延びるように、図示しない床スラブ等に設けられている。なお、図1,2,4において、柱11の内部が空洞であることを示すために、薄く色を付けている。   The column 11 is formed of a steel pipe, for example, in a cylindrical shape, and is provided on a floor slab (not shown) or the like so as to extend in the vertical direction. In FIGS. 1, 2, and 4, the column 11 is lightly colored to indicate that the inside of the column 11 is hollow.

トラス部12は、隣接する柱11の上部間に架設されている。トラス部12は、水平方向に延びる上弦材12Aと、上弦材12Aの下方に設けられ水平方向に延びる下弦材12Bと、上弦材12Aと下弦材12Bとを鉛直方向に対して斜めに連結する複数の斜材12Cと、を有している。これら上弦材12A、下弦材12B及び斜材12Cは、それぞれ鋼管で例えば円筒状に形成されている。   The truss portion 12 is constructed between the upper portions of the adjacent pillars 11. The truss portion 12 includes a plurality of upper chord members 12A extending in the horizontal direction, a lower chord member 12B provided below the upper chord members 12A and extending in the horizontal direction, and an upper chord member 12A and a lower chord member 12B connected obliquely to the vertical direction. The diagonal member 12C. The upper chord member 12A, the lower chord member 12B, and the diagonal member 12C are each formed of a steel pipe, for example, in a cylindrical shape.

耐震補強後の建築物1には、柱11と下弦材12Bとの間及び上弦材12Aと下弦材12Bとの間に、補強部材7,7Yがそれぞれ設けられている。   In the building 1 after the seismic reinforcement, reinforcing members 7 and 7Y are provided between the column 11 and the lower chord member 12B and between the upper chord member 12A and the lower chord member 12B, respectively.

柱11の両側方には、それぞれ補強部材7の一方側の端部が取り付けられている。以下では、補強部材7の柱11への接合構造について説明する。
図2は、図1のA−A断面図である。図3は、図2のB−B断面図である。
図2及び図3に示すように、柱11の外周面に沿って、複数のコッター2が設けられている。本実施形態では、各コッター2は、鋼板等の板状部材が柱11の外周面に沿うように円弧状に湾曲形成されて構成されている。
One end of the reinforcing member 7 is attached to each side of the column 11. Below, the joining structure to the pillar 11 of the reinforcement member 7 is demonstrated.
FIG. 2 is a cross-sectional view taken along the line AA of FIG. 3 is a cross-sectional view taken along the line BB in FIG.
As shown in FIGS. 2 and 3, a plurality of cotters 2 are provided along the outer peripheral surface of the column 11. In the present embodiment, each cotter 2 is configured such that a plate-like member such as a steel plate is curved in an arc shape so as to follow the outer peripheral surface of the column 11.

コッター2は、例えば柱11の周方向に離間して2個及び柱11の鉛直方向に離間して2個、合計4個設けられている。各コッター2は、螺子2Xで柱11に固定されている。なお、コッター2の個数は適宜設定可能である。   For example, two cotters 2 are provided in total, two spaced apart in the circumferential direction of the pillar 11 and two spaced apart in the vertical direction of the pillar 11. Each cotter 2 is fixed to the pillar 11 with a screw 2X. The number of cotters 2 can be set as appropriate.

柱11の径方向外側には、コッター2と離間して囲い部材3が配置されている。囲い部材3は、一対の半筒部材30,30が柱11を挟んでわずかな隙間Sを空けて対向配置され、全体として略円筒状をなすように構成されている。   An enclosing member 3 is arranged on the outer side in the radial direction of the column 11 so as to be separated from the cotter 2. The enclosing member 3 is configured such that a pair of half-cylinder members 30, 30 are opposed to each other with a slight gap S across the column 11, and form a substantially cylindrical shape as a whole.

各半筒部材30は、柱11の外側に配置される囲い部(リングパネル)31と、囲い部31の上下端からそれぞれ柱11の径方向外側に延出するフランジ部(ダイアフラム)32と、を有している。   Each half-cylinder member 30 includes an enclosure (ring panel) 31 disposed outside the column 11, a flange (diaphragm) 32 extending from the upper and lower ends of the enclosure 31 to the outside in the radial direction of the column 11, and have.

また、囲い部31の周方向両端部には、それぞれ径方向外側に延出する取付プレート部(延出部)31Tが設けられている。これら囲い部31、フランジ部32及び取付プレート部31Tは、鋼板等により一体に形成されている。   In addition, attachment plate portions (extension portions) 31 </ b> T extending outward in the radial direction are provided at both ends in the circumferential direction of the enclosure portion 31. The enclosure part 31, the flange part 32, and the mounting plate part 31T are integrally formed of a steel plate or the like.

囲い部31の内周面に沿って、複数の回転防止筋(回転防止部)4が周方向に離間して設けられている。各回転防止筋4は、鉛直方向に延びるように配置されている。本実施形態では、回転防止筋4は鉄筋により形成されている。この回転防止筋4は、囲い部31に溶接等により接合されている。   A plurality of anti-rotation streaks (anti-rotation portions) 4 are provided along the inner peripheral surface of the enclosure 31 so as to be spaced apart in the circumferential direction. Each anti-rotation line 4 is arranged to extend in the vertical direction. In the present embodiment, the anti-rotation bar 4 is formed of a reinforcing bar. The anti-rotation bar 4 is joined to the enclosure 31 by welding or the like.

また、囲い部31の内周面において、回転防止筋4が設けられていない上下位置に、複数のシアー鉄筋5が設けられている。シアー鉄筋5は、水平方向に延びるように、略半円をなす円弧状に形成されている。つまり、シアー鉄筋5は、一対の半筒部材30,30の内周面に沿って、平面視環状に配置されている。本実施形態では、シアー鉄筋5は、上下方向に離間して4本設けられている。   In addition, a plurality of shear reinforcing bars 5 are provided on the inner peripheral surface of the enclosure 31 in the vertical position where the anti-rotation bars 4 are not provided. The shear reinforcing bar 5 is formed in an arc shape that forms a substantially semicircle so as to extend in the horizontal direction. That is, the shear reinforcing bar 5 is disposed in an annular shape in plan view along the inner peripheral surfaces of the pair of half-cylinder members 30 and 30. In the present embodiment, four shear reinforcing bars 5 are provided apart in the vertical direction.

図4は、コッターとシアー鉄筋との間で生じる圧縮力(圧縮ストラット)を説明するための断面の模式図であり、(a)は通常時、(b)は地震時等を示す。
通常時には、図4(a)に示すように、柱11に固定されたコッター2と半筒部材30に設けられたシアー鉄筋5との間に斜め方向(径方向内側に向かうにしたがって次第に下方に向かう方向)に圧縮力(圧縮ストラット)Tが生じる。この圧縮ストラットTが、柱11の軸力N1から柱11に作用するモーメントに対して抵抗する。
一方、地震時等の水平力が作用し曲げが生じる場合には、図4(b)に示すように、柱11に固定されたコッター2と半筒部材30に設けられたシアー鉄筋5との間に斜め方向(補強部材7の軸力N2と交差する方向であって、径方向内側に向かうにしたがって次第に下方に向かう方向)に圧縮ストラットTが生じる。この圧縮ストラットTが、軸力N2から柱11に作用するモーメントに対して抵抗する。
4A and 4B are schematic cross-sectional views for explaining the compressive force (compression strut) generated between the cotter and the shear reinforcing bar. FIG. 4A shows a normal time, FIG. 4B shows an earthquake, and the like.
In a normal state, as shown in FIG. 4 (a), between the cotter 2 fixed to the column 11 and the shear reinforcing bar 5 provided on the half-cylinder member 30, an oblique direction (slowly downward toward the inner side in the radial direction). A compressive force (compression strut) T is generated in the direction of travel. This compression strut T resists the moment acting on the column 11 from the axial force N1 of the column 11.
On the other hand, when a horizontal force acts during an earthquake or the like and bending occurs, the cotter 2 fixed to the column 11 and the shear reinforcing bar 5 provided on the half cylinder member 30 are connected as shown in FIG. A compression strut T is generated in an oblique direction (a direction intersecting the axial force N2 of the reinforcing member 7 and gradually going downward as it goes radially inward). This compression strut T resists the moment acting on the column 11 from the axial force N2.

柱11と半筒部材30との間には、モルタル(充填材)が充填されたモルタル部(充填部)6が形成されている。モルタル部6は、コッター2を介して柱11と半筒部材30,30とを一体化する。   A mortar part (filling part) 6 filled with mortar (filler) is formed between the column 11 and the half cylinder member 30. The mortar part 6 integrates the column 11 and the half-cylinder members 30 and 30 through the cotter 2.

半筒部材30の取付プレート部31Tには、補強部材7が固定されている。補強部材7は、一対の斜材部71,71と、各斜材部71の端部に設けられたガセットプレート72と、を有している。   The reinforcing member 7 is fixed to the mounting plate portion 31 </ b> T of the half cylinder member 30. The reinforcing member 7 has a pair of diagonal members 71, 71 and a gusset plate 72 provided at the end of each diagonal member 71.

本実施形態では、各斜材部71は、例えば断面視コ字状をなす溝形鋼により形成されている。   In the present embodiment, each diagonal member 71 is formed of, for example, a grooved steel having a U-shape in cross section.

ガセットプレート72は、一対の斜材部71,71の端部どうしの間に配置され、各斜材部71にボルト72Xで螺合されている。ガセットプレート72は、斜材部71から柱11側に延びている。   The gusset plate 72 is disposed between the ends of the pair of diagonal members 71 and 71 and is screwed to the diagonal members 71 with bolts 72X. The gusset plate 72 extends from the diagonal member 71 to the column 11 side.

ガセットプレート72は、一対の半筒部材30,30により形成された隙間Sに挿入され、半筒部材30の取付プレート部31Tにボルト31Xで螺合されている。   The gusset plate 72 is inserted into the gap S formed by the pair of half-cylinder members 30 and 30 and is screwed to the mounting plate portion 31T of the half-cylinder member 30 with bolts 31X.

本実施形態では、鉛直方向を軸線方向とする柱11と、コッター2と、一対の半筒部材30,30と、取付プレート部31Tと、モルタル部6と、補強部材7とが耐震補強構造10を構成している。   In the present embodiment, the column 11 having the vertical direction as the axial direction, the cotter 2, the pair of half-cylinder members 30 and 30, the mounting plate portion 31 </ b> T, the mortar portion 6, and the reinforcing member 7 include the earthquake-resistant reinforcing structure 10. Is configured.

また、上記に示す補強部材7は、一対の半筒部材30,30の取付プレート部31T,31間に挟み込まれて固定されているが、図2に示す補強部材7Xのように、半筒部材30の周方向の一部に設けられた一の取付プレート部31Tにガセットプレート72がボルト31Xで螺合され、当該ガセットプレート72に斜材部71,71がボルト締めされる構成であってもよい。   In addition, the reinforcing member 7 described above is sandwiched and fixed between the mounting plate portions 31T and 31 of the pair of half-cylinder members 30 and 30, but, like the reinforcing member 7X shown in FIG. Even if the gusset plate 72 is screwed with the bolt 31X to one mounting plate portion 31T provided in a part of the circumferential direction of the 30, and the diagonal members 71, 71 are bolted to the gusset plate 72. Good.

また、補強部材7の他方側の端部の耐震補強構造10Xは、水平方向を軸線方向とする下弦材12Bと、下弦材12Bの外面に取り付けられたコッター2と、下弦材12Bの外側に配置された一対の半筒部材30,30と、一対の半筒部材30,30の内面に沿って設けられ、コッター2との間で圧縮力を生じさせるシアー鉄筋5と、各半筒部材30の取付プレート部31Tと、下弦材12Bと一対の半筒部材30,30との間に充填されたモルタル部6と、取付プレート部31Tに取り付けられた補強部材7と、を備えている。この耐震補強構造10Xでは、回転防止筋4は水平方向に沿って配置され、シアー鉄筋5は下弦材12Bの周方向に沿って配置されている。なお、半筒部材30には、径方向外側に突出するリブプレートが設けて、面外の変形を拘束する構成であってもよい。   The seismic reinforcement structure 10X at the other end of the reinforcing member 7 is disposed on the outer side of the lower chord material 12B, the lower chord material 12B having the horizontal direction as the axial direction, the cotter 2 attached to the outer surface of the lower chord material 12B. The pair of half-cylinder members 30, 30, the shear rebar 5 that is provided along the inner surfaces of the pair of half-cylinder members 30, 30 and generates a compressive force with the cotter 2, and each half-cylinder member 30 A mounting plate portion 31T, a mortar portion 6 filled between the lower chord member 12B and the pair of half-cylinder members 30 and 30, and a reinforcing member 7 attached to the mounting plate portion 31T are provided. In this seismic reinforcement structure 10X, the anti-rotation bars 4 are arranged along the horizontal direction, and the shear reinforcing bars 5 are arranged along the circumferential direction of the lower chord material 12B. In addition, the half cylinder member 30 may be configured to be provided with a rib plate protruding outward in the radial direction to restrain out-of-plane deformation.

また、同様に、トラス部12の上弦材12Aと下弦材12Bとの間には、補強部材7Yが設けられている。補強部材7Yの上弦材12A側の耐震補強構造10Yは、水平方向を軸線方向とする上弦材12Aと、上弦材12Aの外面に取り付けられたコッター2と、上弦材12Aの外側に配置された一対の半筒部材30,30と、一対の半筒部材30,30の内面に沿って設けられ、コッター2との間で圧縮力を生じさせるシアー鉄筋5と、各半筒部材30の取付プレート部31Tと、上弦材12Aと一対の半筒部材30,30との間に充填されたモルタル部6と、取付プレート部31Tに取り付けられた補強部材7Yと、を備えている。この耐震補強構造10Yでは、回転防止筋4は水平方向に沿って配置され、シアー鉄筋5は上弦材12Aの周方向に沿って配置されている。   Similarly, a reinforcing member 7Y is provided between the upper chord member 12A and the lower chord member 12B of the truss portion 12. The seismic reinforcement structure 10Y on the upper chord member 12A side of the reinforcing member 7Y includes a pair of upper chord members 12A having the horizontal direction as the axial direction, the cotter 2 attached to the outer surface of the upper chord member 12A, and the outer chord member 12A. Shear rebar 5 that is provided along the inner surfaces of the half-cylinder members 30, 30 and the pair of half-cylinder members 30, 30 and generates a compressive force with the cotter 2, and the mounting plate portion of each half-cylinder member 30 31T, a mortar portion 6 filled between the upper chord member 12A and the pair of half-cylinder members 30 and 30, and a reinforcing member 7Y attached to the attachment plate portion 31T. In the seismic reinforcement structure 10Y, the anti-rotation bars 4 are arranged along the horizontal direction, and the shear reinforcing bars 5 are arranged along the circumferential direction of the upper chord material 12A.

また、同様に、補強部材7Yの下弦材12B側の耐震補強構造10Zは、水平方向を軸線方向とする下弦材12Bと、下弦材12Bの外面に取り付けられたコッター2と、下弦材12Bの外側に配置された一対の半筒部材30,30と、一対の半筒部材30,30の内面に沿って設けられ、コッター2との間で圧縮力を生じさせるシアー鉄筋5と、各半筒部材30の取付プレート部31Tと、下弦材12Bと一対の半筒部材30,30との間に充填されたモルタル部6と、取付プレート部31Tに取り付けられた補強部材7Yと、を備えている。この耐震補強構造10Zでは、回転防止筋4は水平方向に沿って配置され、シアー鉄筋5は下弦材12Bの周方向に沿って配置されている。   Similarly, the seismic reinforcement structure 10Z on the lower chord member 12B side of the reinforcing member 7Y includes the lower chord member 12B having the horizontal direction as the axial direction, the cotter 2 attached to the outer surface of the lower chord member 12B, and the outer side of the lower chord member 12B. A pair of half-cylinder members 30, 30 disposed on the inner surface of the pair of half-cylinder members 30, 30 and a shear rebar 5 that generates a compressive force between the cotter 2 and each half-cylinder member 30 mounting plate portions 31T, a mortar portion 6 filled between the lower chord member 12B and the pair of half-cylinder members 30 and 30, and a reinforcing member 7Y attached to the mounting plate portion 31T. In this seismic reinforcement structure 10Z, the anti-rotation bars 4 are arranged along the horizontal direction, and the shear reinforcing bars 5 are arranged along the circumferential direction of the lower chord material 12B.

次に、上記のように構成された耐震補強構造10の耐震補強方法について説明する。
まず、コッター固定工程を行う。
既存の建築物1における鋼管で形成された柱11の外面に、コッター2を螺子2Xで固定する。
Next, the earthquake-proof reinforcement method of the earthquake-proof reinforcement structure 10 comprised as mentioned above is demonstrated.
First, a cotter fixing process is performed.
The cotter 2 is fixed to the outer surface of the pillar 11 formed of a steel pipe in the existing building 1 with screws 2X.

次に、囲い部材配置工程を行う。
半筒状に形成された一対の半筒部材30,30を、柱11の外側に柱11を囲うように配置する。半筒部材30と柱11との間には、空間部Pが形成されている。
Next, a surrounding member arranging step is performed.
A pair of half-cylinder members 30, 30 formed in a half-cylinder shape are arranged outside the column 11 so as to surround the column 11. A space portion P is formed between the half cylinder member 30 and the column 11.

次に、シアー鉄筋配置工程を行う。
一対の半筒部材30,30の内周面に沿って、シアー鉄筋5を、平面視環状に配置する。
Next, a shear reinforcing bar arrangement process is performed.
The shear reinforcing bars 5 are arranged in an annular shape in plan view along the inner peripheral surfaces of the pair of half-cylinder members 30 and 30.

次に、充填工程を行う。
柱11と囲い部材3との間に形成された空間部Pに、モルタルを充填する。モルタルが硬化すると、モルタル部6が形成される。このモルタル部6は、コッター2を介して、柱11と一対の半筒部材30,30とを一体化する。
Next, a filling process is performed.
Mortar is filled in the space P formed between the pillar 11 and the surrounding member 3. When the mortar is cured, a mortar portion 6 is formed. The mortar part 6 integrates the pillar 11 and the pair of half-cylinder members 30 and 30 through the cotter 2.

次に、補強部材固定工程を行う。
各半筒部材30に設けられた各取付プレート部31Tに、補強部材7のガセットプレート72をボルト72Xで螺合する。以上により、補強部材7が、囲い部材3の取付プレート部31Tに接合される。
Next, a reinforcing member fixing step is performed.
The gusset plate 72 of the reinforcing member 7 is screwed onto the mounting plate portions 31T provided on the half cylinder members 30 with bolts 72X. Thus, the reinforcing member 7 is joined to the mounting plate portion 31T of the enclosure member 3.

このように構成された耐震補強構造10では、鋼管で構成された柱11と囲い部材3との間には、柱11の外面に取り付けられたコッター2を介して柱11と一体化されたモルタル部6が形成されている。また、囲い部材3は、モルタル部6と一体化されている。換言すると、囲い部材3は、コッター2及びモルタル部6を介して、柱11と一体化されている。また、囲い部材3から外側に延出する取付プレート部31Tには、補強部材7がボルト31Xで固定されている。よって、柱11が鋼管で形成されていても、補強部材7を、柱11と一体化された囲い部材3から外側に延出する取付プレート部31Tにボルト72Xで固定することができる。したがって、補強部材7を囲い部材3に溶接によらず取り付けて、建築物1の耐震性を向上させることができる。また、ボルト72Xのみで固定できるため、施工時に手間がかからない。
同様に、上弦材12Aに補強部材7Yを取り付けることができるとともに、下弦材12Bに補強部材7,7Yを取り付けることができる。
In the seismic reinforcement structure 10 configured as described above, a mortar integrated with the column 11 is provided between the column 11 formed of a steel pipe and the surrounding member 3 via a cotter 2 attached to the outer surface of the column 11. Part 6 is formed. Further, the enclosure member 3 is integrated with the mortar portion 6. In other words, the surrounding member 3 is integrated with the column 11 via the cotter 2 and the mortar portion 6. Further, the reinforcing member 7 is fixed to the mounting plate portion 31T extending outward from the surrounding member 3 with bolts 31X. Therefore, even if the column 11 is formed of a steel pipe, the reinforcing member 7 can be fixed to the mounting plate portion 31T extending outward from the enclosure member 3 integrated with the column 11 with the bolt 72X. Therefore, it is possible to improve the earthquake resistance of the building 1 by attaching the reinforcing member 7 to the surrounding member 3 without welding. Moreover, since it can fix only with the volt | bolt 72X, it does not take an effort at the time of construction.
Similarly, the reinforcing member 7Y can be attached to the upper chord member 12A, and the reinforcing members 7, 7Y can be attached to the lower chord member 12B.

さらに、囲い部材3の内面に沿って設けられたシアー鉄筋5は、コッター2との間で圧縮力(圧縮ストラット)Tを生じさせ、柱11と補強部材7との間で軸力や曲げ応力を伝達することができる。よって、軸力や曲げ応力が作用する地震時にも、柱11と囲い部材3とが位置ずれを起こすことがないため、互いに確実に荷重を伝達することができる。   Further, the shear rebar 5 provided along the inner surface of the enclosure member 3 generates a compressive force (compression strut) T between the cotter 2 and an axial force or a bending stress between the column 11 and the reinforcing member 7. Can be transmitted. Therefore, even during an earthquake in which an axial force or a bending stress acts, the column 11 and the enclosure member 3 do not shift in position, so that the loads can be reliably transmitted to each other.

また、柱11の外縁が円形に形成されていても、囲い部材3の内側には周方向に離間して複数設けられた回転防止筋4がモルタル部6に埋め込まれて、囲い部材3とモルタル部6との間に生じる摩擦力が大きくなるため、囲い部材3がモルタル部6に対して相対的に周方向にずれることがない。よって、補強部材7を、モルタル部6及びコッター2を介して、位置ずれなく固定することができる。   Further, even if the outer edge of the pillar 11 is formed in a circular shape, a plurality of anti-rotation bars 4 that are spaced apart in the circumferential direction are embedded in the mortar portion 6 inside the enclosure member 3, and the enclosure member 3 and the mortar Since the frictional force generated between the mortar part 6 and the mortar part 6 does not shift relative to the mortar part 6 because the frictional force generated between the part 6 and the mortar part 6 is increased. Therefore, the reinforcing member 7 can be fixed through the mortar portion 6 and the cotter 2 without misalignment.

また、コッター2は螺子2Xで柱11に固定されているため、コッター2を簡易に取り付けることができる。なお、コッター2は、接着剤により固定されていてもよい。   Moreover, since the cotter 2 is fixed to the pillar 11 with the screw 2X, the cotter 2 can be easily attached. The cotter 2 may be fixed with an adhesive.

なお、上述した実施の形態において示した組立手順、あるいは各構成部材の諸形状や組み合わせ等は一例であって、本発明の主旨から逸脱しない範囲において設計要求等に基づき種々変更可能である。   It should be noted that the assembly procedure shown in the above-described embodiment, or the shapes and combinations of the constituent members are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

例えば、上記に示す実施形態において、柱11を形成する鋼管の内部は空洞とされているが本発明はこれに限られない。鋼管の内部に、コンクリート等が充填された構成であってもよい。   For example, in the embodiment described above, the inside of the steel pipe forming the column 11 is a hollow, but the present invention is not limited to this. The structure filled with concrete etc. inside the steel pipe may be sufficient.

また、上記に示す実施形態において、回転防止部は、囲い部31の内周面に沿って、周方向に離間して複数設けられ、鉛直方向に延びる回転防止筋4で構成されているが、本発明はこれに限られない。回転防止部は、囲い部材の内面に設けられていればよく、例えば囲い部材の内面に沿って鉄筋が軸線方向の回りにらせん状に配置(不図示。以下同じ。)されていてもよい。あるいは、回転防止部は、囲い部材の内面から柱11の径方向内側に突出する凸部(不図示。以下同じ。)であってもよい。これらの場合には、らせん状に配置された鉄筋や凸部が充填部に埋め込まれて、囲い部材が充填部に対して相対的に周方向にずれることがない。また、囲い部材の内面から柱11の径方向外側に凹む凹部(不図示。以下同じ。)であってもよく、この場合には凹部に充填部が入り込み、囲い部材が充填部に対して相対的に周方向にずれることがない。   Further, in the embodiment described above, the rotation prevention unit is configured by a plurality of rotation prevention bars 4 that are provided in the circumferential direction along the inner peripheral surface of the enclosure part 31 and are separated from each other in the circumferential direction. The present invention is not limited to this. The anti-rotation portion only needs to be provided on the inner surface of the enclosure member. For example, the reinforcing bars may be spirally arranged around the axial direction along the inner surface of the enclosure member (not shown; the same applies hereinafter). Alternatively, the rotation preventing portion may be a convex portion (not shown; the same applies hereinafter) that protrudes inward in the radial direction of the column 11 from the inner surface of the enclosure member. In these cases, the reinforcing bars and convex portions arranged in a spiral shape are embedded in the filling portion, and the surrounding member does not shift in the circumferential direction relative to the filling portion. Further, a recess (not shown; the same applies hereinafter) may be recessed from the inner surface of the enclosure member to the outside in the radial direction of the column 11. In this case, the filling portion enters the recess, and the enclosure member is relative to the filling portion. Therefore, it does not shift in the circumferential direction.

1…建築物
2…コッター
2X…螺子
3…囲い部材
4…回転防止筋(回転防止部)
5…シアー鉄筋
6…モルタル部(充填部)
7…補強部材
10…耐震補強構造
11…柱(構造体)
12…トラス部
12A…上弦材
12B…下弦材
12C…斜材
13…屋根
30…半筒部材
31…囲い部
31T…取付プレート部(延出部)
32…フランジ部
71…斜材部
72…ガセットプレート
72X…ボルト
DESCRIPTION OF SYMBOLS 1 ... Building 2 ... Cotter 2X ... Screw 3 ... Enclosure member 4 ... Anti-rotation muscle (rotation prevention part)
5 ... Shear rebar 6 ... Mortar part (filling part)
7 ... Reinforcement member 10 ... Seismic reinforcement structure 11 ... Column (structure)
DESCRIPTION OF SYMBOLS 12 ... Truss part 12A ... Upper chord material 12B ... Lower chord material 12C ... Diagonal material 13 ... Roof 30 ... Half cylinder member 31 ... Enclosure part 31T ... Mounting plate part (extension part)
32 ... Flange 71 ... Diagonal member 72 ... Gusset plate 72X ... Bolt

Claims (4)

鋼管で形成された構造体と、
該構造体の外面に取り付けられたコッターと、
筒状に形成され、前記コッターの外側に前記構造体を囲うように配置された囲い部材と、
該囲い部材の内面に沿って設けられ、前記コッターとの間で圧縮力を生じさせるシアー鉄筋と、
前記囲い部材から外側に延出する延出部と、
前記構造体と前記囲い部材との間に充填され、前記コッターを介して前記構造体と一体化された充填部と、
前記延出部にボルトで固定された補強部材と、を備え
前記コッターと前記シアー鉄筋との間には、前記圧縮力が斜め方向に作用することを特徴とする耐震補強構造。
A structure formed of steel pipes;
A cotter attached to the outer surface of the structure;
An enclosing member formed in a cylindrical shape and arranged to enclose the structure outside the cotter;
A shear rebar provided along the inner surface of the enclosure member for generating a compressive force with the cotter;
An extending portion extending outward from the enclosure member;
A filling portion that is filled between the structure and the surrounding member and integrated with the structure via the cotter;
A reinforcing member fixed to the extending portion with a bolt ,
The seismic reinforcement structure characterized in that the compressive force acts in an oblique direction between the cotter and the shear reinforcing bar .
前記構造体の外縁は、平面視円形に形成され、
前記囲い部材の内面には、回転防止部が設けられていることを特徴とする請求項1に記載の耐震補強構造。
The outer edge of the structure is formed in a circular shape in plan view,
The seismic reinforcement structure according to claim 1, wherein an anti-rotation portion is provided on an inner surface of the enclosure member.
前記コッターは、前記構造体に螺子または接着剤により取り付けられていることを特徴とする請求項1または2に記載の耐震補強構造。   The seismic reinforcement structure according to claim 1 or 2, wherein the cotter is attached to the structure by a screw or an adhesive. 鋼管で形成された構造体の外面に、コッターを固定するコッター固定工程と、
筒状に形成されるとともに外側に延出する延出部が設けられた囲い部材を、前記コッターの外側に前記構造体を囲うように配置する囲い部材配置工程と、
前記囲い部材の内面に沿って、前記コッターとの間で圧縮力を生じさせるシアー鉄筋を配置するシアー鉄筋配置工程と、
前記構造体と前記囲い部材との間に充填材を充填して、前記コッターを介して前記構造体と前記囲い部材とを一体化する充填工程と、
前記延出部に補強部材をボルトで固定する補強部材固定工程と、を備え
前記コッターと前記シアー鉄筋との間には、前記圧縮力が斜め方向に作用することを特徴とする耐震補強方法。
A cotter fixing step of fixing a cotter to the outer surface of a structure formed of a steel pipe;
An enclosing member arrangement step of arranging an enclosing member formed in a cylindrical shape and provided with an extending portion extending outward, so as to enclose the structure outside the cotter;
A shear reinforcing bar arrangement step of arranging a shear reinforcing bar that generates a compressive force with the cotter along the inner surface of the enclosure member;
A filling step of filling a filler between the structure and the enclosure member, and integrating the structure and the enclosure member via the cotter;
A reinforcing member fixing step of fixing a reinforcing member to the extension part with a bolt ,
The seismic reinforcement method , wherein the compressive force acts in an oblique direction between the cotter and the shear reinforcing bar .
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