JPH0751803B2 - Seismic retrofitting method for RC structure opening - Google Patents

Seismic retrofitting method for RC structure opening

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Publication number
JPH0751803B2
JPH0751803B2 JP27935188A JP27935188A JPH0751803B2 JP H0751803 B2 JPH0751803 B2 JP H0751803B2 JP 27935188 A JP27935188 A JP 27935188A JP 27935188 A JP27935188 A JP 27935188A JP H0751803 B2 JPH0751803 B2 JP H0751803B2
Authority
JP
Japan
Prior art keywords
frame
opening
seismic
shear panel
resistant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP27935188A
Other languages
Japanese (ja)
Other versions
JPH02128035A (en
Inventor
太郎 関松
英雄 勝俣
Original Assignee
株式会社大林組
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Filing date
Publication date
Application filed by 株式会社大林組 filed Critical 株式会社大林組
Priority to JP27935188A priority Critical patent/JPH0751803B2/en
Publication of JPH02128035A publication Critical patent/JPH02128035A/en
Publication of JPH0751803B2 publication Critical patent/JPH0751803B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 《産業上の利用分野》 本発明は、鉄筋コンクリート造躯体の開口部の耐震性能
を向上させる耐震補強方法に関する。
Description: TECHNICAL FIELD The present invention relates to a seismic retrofitting method for improving seismic performance of an opening of a reinforced concrete structure.
《従来の技術》 鉄筋コンクリートで建物を構成する場合、耐震性能の向
上を図る目的で柱や梁の断面積を大きくしていた。また
耐震壁を設置することも行なわれていた。
<Prior art> When constructing a building from reinforced concrete, the cross-sectional area of columns and beams was increased in order to improve seismic performance. In addition, earthquake resistant walls were also installed.
《発明が解決しようとする課題》 柱や梁の断面積を大きくすれば居住空間が狭くなり、更
に重量も増える。また耐震壁は靱性能が高くないので強
度を高める必要性から重量が増え、特に耐震壁内の開口
の補強には留意しているが、靱性の高い補強方法が期待
されている。
<Problems to be solved by the invention> Increasing the cross-sectional area of columns and beams will reduce the living space and increase the weight. In addition, since the seismic wall does not have high toughness, the weight increases due to the need to increase the strength. Especially, we are paying attention to the reinforcement of the opening in the seismic wall, but a reinforcing method with high toughness is expected.
耐震壁によって開口が塞がれ、開口がなくなることによ
る使い勝手の悪化もあった。耐震壁に開口を設けると、
補強効率が低下するからである。本発明は上記事情に鑑
みてなされたものであって、その目的は上記従来の諸問
題を解消することにある。即ち、既存の鉄筋コンクリー
ト躯体あるいは新設鉄筋コンクリート躯体の開口部の耐
震性能を向上させることにある。
The opening was closed by the earthquake-resistant wall, and there was also a loss of usability because the opening disappeared. If you make an opening in the earthquake resistant wall,
This is because the reinforcement efficiency is reduced. The present invention has been made in view of the above circumstances, and an object thereof is to solve the above-mentioned conventional problems. That is, it is to improve the seismic performance of the opening of the existing reinforced concrete frame or the new reinforced concrete frame.
《課題を解決するための手段》 上記目的を達成するために本発明に係るRC造躯体開口部
の耐震補強方法は、鉄筋コンクリート造躯体の被補強開
口部内周面に沿わせて、該開口部内に収まる四角形状の
枠を構成し、該枠の上辺から垂下させて剪断パネルを設
けるとともに、該剪断パネルを頂点とし、かつ該枠の下
辺部分が底辺となる三角形状をなすように、該枠の下辺
から該剪断パネルに向かって斜めに立ち上げて当該三角
形状の斜辺をなすブレースを設けて、金属系耐震構造を
構成し、上記枠の外周面と該開口部内周面との間を適宜
な手段で接合することにより、該開口部内に該金属系耐
震構造を固定することを特徴とする。
<< Means for Solving the Problem >> In order to achieve the above-mentioned object, the seismic reinforcement method of the RC structure opening portion according to the present invention is arranged along the inner peripheral surface of the reinforced concrete structure structure to be reinforced and inside the opening portion. A quadrangular frame that fits is formed, and a shear panel is provided by being hung from the upper side of the frame, and the shear panel serves as an apex, and the lower side of the frame forms a triangular shape with the bottom side of the frame. A metal-type seismic resistant structure is provided by providing a brace that diagonally rises from the lower side toward the shear panel to form the triangular hypotenuse, and an appropriate distance is provided between the outer peripheral surface of the frame and the inner peripheral surface of the opening. The metal-based seismic resistant structure is fixed in the opening by joining by means.
また、鉄筋コンクリート造躯体およびその開口部を新設
形成するに際し、該開口部内周面に沿わせて四角形状の
枠を構成し、該枠の上辺から垂下させて剪断パネルを設
けるとともに、該剪断パネルを頂点とし、かつ該枠の下
辺部分が底辺となる三角形状をなすように、該枠の下辺
から該剪断パネルに向かって斜めに立ち上げて当該三角
形状の斜辺をなすブレースを設けて、金属系耐震構造を
構成し、該鉄筋コンクリート造躯体の開口部形成位置に
上記金属系耐震構造を建て込みコンクリートを打設し
て、上記枠を該開口部内周面に一体的に密着固定させ
て、該金属系耐震構造を該開口部と一体に施工すること
を特徴とする。
In addition, when newly forming a reinforced concrete structure and its opening, a rectangular frame is formed along the inner peripheral surface of the opening, and a shear panel is hung from the upper side of the frame, and the shear panel is provided. A metal brace is provided, which has a brace forming a triangular hypotenuse by obliquely rising from the lower side of the frame toward the shear panel so that the lower side of the frame forms a triangular shape having a bottom side. A seismic resistant structure is constructed, the metal-based seismic resistant structure is built in the opening forming position of the reinforced concrete structure, concrete is placed, and the frame is integrally closely fixed to the inner peripheral surface of the opening, It is characterized in that a system earthquake-resistant structure is constructed integrally with the opening.
《作用》 本発明の作用について説明すると、新設の場合、補修の
場合いずれにおいても、RC造躯体の開口部を補強する際
に、当該開口部内に金属系耐震構造を収めて設置するよ
うにしたので、従来のように柱や梁の断面積を増加させ
る方法と比較して、居住空間をより広く確保することが
できるとともに、断面積の増加に伴う重量増加もなくな
る。他方、従来の耐震壁を採用する方法と比較しても、
本発明の補強方法では靱性を期待できる金属系耐震構造
で開口部を補強しているので、耐震壁よりも軽量にし
て、より効果的な耐震補強を確保することができる。さ
らに、耐震壁において憂慮される開口の形成について
も、本発明に採用した金属系耐震構造は、枠と、この内
部に三角形状を呈して配設されるブレースおよび剪断パ
ネルとから構成されるので、これら相互間にはそもそも
隙間が存在しており、従って当該耐震構造の強度を減殺
させることなく、この隙間を利用して所望の開口を確保
することができる。
<Operation> To explain the operation of the present invention, in any case of new installation and repair, when reinforcing the opening of the RC structure, the metal-based seismic resistant structure is installed in the opening. Therefore, as compared with the conventional method of increasing the cross-sectional area of the pillar or the beam, it is possible to secure a wider living space and the weight increase due to the increase of the cross-sectional area is eliminated. On the other hand, even if compared with the method that adopts the conventional earthquake-resistant wall,
In the reinforcing method of the present invention, since the opening is reinforced by the metal-based seismic resistant structure that is expected to have toughness, it is possible to make the weight lighter than the seismic resistant wall and ensure more effective seismic reinforcing. Further, regarding the formation of the opening which is concerned about in the earthquake-resistant wall, the metal-based earthquake-resistant structure adopted in the present invention is composed of the frame and the brace and the shear panel which are arranged in a triangular shape inside the frame. In the first place, there is a gap between them, so that a desired opening can be secured by utilizing this gap without diminishing the strength of the earthquake-resistant structure.
さらに、本発明に採用している金属系耐震構造の機能に
ついて説明すると、三角形の斜辺をなすブレースと、三
角形の頂点で枠の上辺との間に設けた剪断パネルとで、
四角形状の枠内に、Y型の靱性抵抗型のブレース構造を
構成している。開口部に作用する地震力等の外力に対
し、四角形状の枠は応力を分散化させ、これによりRC躯
体、ならびにこのRC躯体と枠との接合部分の損傷を防止
することができる。またブレースは、開口部に作用にす
る、同様な地震力等の外力を引張力や圧縮力に変換し、
これに抵抗することができる。さらに、剪断パネルは、
枠とブレースとの間に介在し、これら間に伝達されるエ
ネルギーを吸収するとともに、枠と連携して、当該剪断
パネル周りに発生するモーメントや剪断力に抵抗するこ
とができる。従って、地震力等の外力で開口部に変形力
が作用しても、これら枠、ブレースおよび剪断パネルで
構成した金属系耐震構造によって、RC造躯体を効果的に
耐震補強することができる。
Furthermore, explaining the function of the metal-based seismic resistant structure adopted in the present invention, with the brace forming the hypotenuse of the triangle, and the shear panel provided between the upper side of the frame at the apex of the triangle,
A Y-shaped toughness-resistant brace structure is formed in a rectangular frame. With respect to external force such as seismic force acting on the opening, the rectangular frame disperses the stress, thereby preventing damage to the RC skeleton and the joint between the RC skeleton and the frame. In addition, the brace converts the same external force such as seismic force acting on the opening into tensile force and compression force,
You can resist this. In addition, the shear panel
It is interposed between the frame and the brace to absorb the energy transmitted between them and cooperate with the frame to resist the moment and shearing force generated around the shear panel. Therefore, even if a deforming force acts on the opening due to an external force such as seismic force, the RC structure can be effectively seismically reinforced by the metal-based seismic structure composed of these frames, braces and shear panels.
《実施例》 以下、本発明の好適な実施例について図面を参照にして
詳細に説明する。
<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.
第1図は鉄筋コンクリート造(RC造)の柱1と梁2とで
囲まれた四角形の開口部3に鉄骨系耐震構造4を適用し
た場合を示す。本実施例は基本的には、RC造の柱1や梁
2に囲まれた、補強すべき開口部3内周面に沿わせて、
開口部3内に収まる四角形状の枠5を構成し、枠5の上
辺から垂下させて剪断パネル7を設けるとともに、剪断
パネル7を頂点とし、かつ枠5の下辺部分が底辺となる
三角形状をなすように、枠5の下辺から剪断パネル7に
向かって斜めに立ち上げて当該三角形状の斜辺をなすブ
レース8を設けて、鉄骨系耐震構造4を構成し、枠5の
外周面と開口部3内周面との間を適宜な手段で接合する
ことにより、開口部3内に鉄骨系耐震構造4を固定する
ようになっている。
Fig. 1 shows the case where a steel frame seismic resistant structure 4 is applied to a rectangular opening 3 surrounded by columns 1 and beams 2 of reinforced concrete structure (RC structure). In this embodiment, basically, along the inner peripheral surface of the opening 3 to be reinforced, which is surrounded by the RC-made columns 1 and beams 2,
A quadrangular frame 5 that fits in the opening 3 is configured, and a shear panel 7 is provided by hanging it from the upper side of the frame 5, and the shear panel 7 serves as an apex, and the lower side of the frame 5 has a triangular shape with the bottom side. As described above, the braces 8 that obliquely stand up from the lower side of the frame 5 toward the shear panel 7 to form the triangular hypotenuses are provided to configure the steel-based seismic resistant structure 4, and the outer peripheral surface of the frame 5 and the opening. The steel-frame-based seismic resistant structure 4 is fixed in the opening 3 by joining the inner peripheral surface of the structure 3 with an appropriate means.
すなわち、開口部3よりも小さな相似形にH形鋼を組む
ことにより、枠5を構成している。そして、枠5の上辺
に位置する上横枠の中央部分ウェブ及び下辺に位置する
下横枠の両端部分ウェブを、スチフナー6で補強してい
る。さらに、枠5の上横枠中央部分に剪断パネル7を垂
下固定し、下横枠の両端部から各々斜め上方に立ち上げ
たブレース8を、剪断パネル7の垂下端部に接続固定し
ている。
That is, the frame 5 is formed by assembling the H-shaped steel into a similar shape smaller than the opening 3. Then, the central partial web of the upper horizontal frame located on the upper side of the frame 5 and both end partial webs of the lower horizontal frame located on the lower side are reinforced by the stiffeners 6. Further, the shear panel 7 is suspended and fixed to the central portion of the upper horizontal frame of the frame 5, and the braces 8 that are raised obliquely upward from both ends of the lower horizontal frame are connected and fixed to the suspended lower end of the shear panel 7. .
上記構成による鉄骨系耐震構造4は、枠5内にブレース
8を「ハ」の字型に直結せず、束状の剪断パネル7を介
した「Y」字型になっており、剪断パネル7の弾力で靱
性を高めている。この鉄骨系耐震構造4を開口部3に取
り付けるに際しては、第2図の如く柱1,梁2にアンカー
9を打ち、枠5の外周面にスタッド10を取付けた後、枠
5を開口部3に収め、開口部3内のアンカー9とスタッ
ド10との間に無収縮モルタル11を打設して、取り付け固
定が完了する。
The steel-frame-based seismic resistant structure 4 having the above-described configuration does not directly connect the brace 8 in the frame 5 in the “C” shape, but is in the “Y” shape via the bundle-shaped shear panel 7. The toughness is enhanced by the elasticity of. When attaching the steel frame type seismic resistant structure 4 to the opening 3, after mounting the anchors 9 on the columns 1 and the beams 2 and attaching the studs 10 on the outer peripheral surface of the frame 5 as shown in FIG. Then, the non-shrinkable mortar 11 is placed between the anchor 9 and the stud 10 in the opening 3 to complete the mounting and fixing.
なお、鉄骨系耐震構造4のブレース8の構成は第3図の
如く、二つの剪断パネル7a−7aを枠5a内において、互い
に離して並設し、それぞれの剪断パネル7a−7aからブレ
ース8aを斜めに降ろすこともよい。即ち、Y字型に組ん
だブレース8aが、四角形に構成した枠5a内に横並びにな
っている。
In addition, as shown in FIG. 3, the structure of the brace 8 of the steel frame type seismic resistant structure 4 is such that two shear panels 7a-7a are arranged side by side in the frame 5a so as to be separated from each other, and the brace 8a is formed from each shear panel 7a-7a. It is also possible to lower it diagonally. That is, the braces 8a assembled in a Y shape are arranged side by side in the frame 5a formed in a quadrangle.
こうすると、剪断パネル7a−7aの位置が両端方向にず
れ、開口部3内にブレース8a,8aを張設したときに設け
る窓開口12の位置や高さ及び幅を、変更することができ
る。
By doing so, the positions of the shear panels 7a-7a are shifted toward both ends, and the position, height and width of the window opening 12 provided when the braces 8a, 8a are stretched in the opening 3 can be changed.
第4図以下は別の実施例を示す。これは柱1,梁2ととも
にRC造躯体を新築する場合で、RC造躯体にコンクリート
を打設するときに鉄骨系耐震構造4を一体に組み込むも
のである。本実施例は基本的には、RC造の柱1や梁2、
並びに開口部3を新設形成するに際し、開口部3内周面
に沿わせて四角形状の枠5を構成し、枠5の上辺から垂
下させて剪断パネル7を設けるとともに、剪断パネル7
を頂点とし、かつ枠5の下辺部分が底辺となる三角形状
をなすように、枠5の下辺から剪断パネル7に向かって
斜めに立ち上げて当該三角形状の斜辺をなすブレース8
を設けて、鉄骨系耐震構造4を構成し、RC造躯体の開口
部3形成位置に当該鉄骨系耐震構造4を建て込みコンク
リートを打設して、枠5を開口部3内周面に一体的に密
着固定させて、鉄骨系耐震構造4を開口部3と一体に施
工するようになっている。
FIG. 4 and subsequent figures show another embodiment. This is a case where a RC structure is newly built together with the pillar 1 and the beam 2, and the steel frame seismic resistant structure 4 is integrated into the RC structure when placing concrete. In this embodiment, basically, RC-made columns 1 and beams 2,
In addition, when the opening portion 3 is newly formed, a rectangular frame 5 is formed along the inner peripheral surface of the opening portion 3, and the shear panel 7 is provided so as to hang down from the upper side of the frame 5 and the shear panel 7
And the lower side of the frame 5 has a triangular shape with the bottom side being the bottom side. The brace 8 is diagonally raised from the lower side of the frame 5 toward the shear panel 7 to form the oblique side of the triangular shape.
To construct a steel-based seismic-resistant structure 4, build the steel-based seismic-resistant structure 4 at the opening 3 forming position of the RC structure, and pour concrete into it, and the frame 5 is integrated with the inner peripheral surface of the opening 3. The steel frame type earthquake-resistant structure 4 is constructed integrally with the opening 3.
すなわち、第5図の如く枠5の外周面側にスタッド10を
打ち、柱1(梁2も同じ)のコンクリートを打設する。
したがって、枠5と柱1,梁2との間は密実一体に構成さ
れる。
That is, as shown in FIG. 5, studs 10 are struck on the outer peripheral surface side of the frame 5, and concrete for the pillar 1 (beam 2 is the same) is struck.
Therefore, the frame 5 and the pillar 1 and the beam 2 are solidly integrated.
以上の本実施例では、ブレース8と剪断パネル7とで四
角形状の枠5内にY型の靱性抵抗型ブレースを構成し、
枠5で、開口部3に作用する地震力などの外力によって
生ずる応力の分散を計り、RC躯体、および枠5とRC躯体
との接合部分の損傷を防止する。ここに、ブレース8の
強度と剛性を十分に高めておくことによって、過大な地
震力を受けたときには、剪断パネル7に損傷を集中させ
る。すなわち、剪断パネル7には、枠5やブレース8に
先立って座屈する程度の、適度な強度と大きな靱性能を
適宜設定できるので、これにより剪断パネル7は、地震
時に大きなエネルギー吸収を行ない建物の応答変形を小
さくして、建物の被害を低減させるダンパーとして機能
し、制振効果を発揮する。
In the present embodiment described above, the brace 8 and the shear panel 7 constitute a Y-shaped toughness resistant brace in the rectangular frame 5.
The frame 5 measures the dispersion of stress generated by an external force such as seismic force acting on the opening 3 to prevent damage to the RC frame and the joint between the frame 5 and the RC frame. By sufficiently increasing the strength and rigidity of the brace 8 here, damage is concentrated on the shear panel 7 when an excessive seismic force is applied. In other words, the shear panel 7 can be appropriately set with appropriate strength and large toughness such that the shear panel 7 buckles prior to the frame 5 and the brace 8. Therefore, the shear panel 7 absorbs a large amount of energy in the event of an earthquake, and thus the shear panel 7 has a large amount of energy. It functions as a damper that reduces the response deformation and reduces damage to the building, and exerts a vibration damping effect.
さらに、剪断パネル7は枠5と連携して、当該剪断パネ
ル7周りに発生するモーメントや剪断力に抵抗すること
ができる。
Furthermore, the shear panel 7 can cooperate with the frame 5 to resist the moment and shear force generated around the shear panel 7.
そしてさらに、ブレース8の下端部を接続した枠5の底
辺部分が、ブレース8とともに引張力および圧縮力に抵
抗する。
Further, the bottom portion of the frame 5 to which the lower end portion of the brace 8 is connected resists the tensile force and the compressive force together with the brace 8.
このように開口部3の変形力に対して、枠5と剪断パネ
ル7およびブレース8とからなるY型ブレースとによる
鉄骨系耐震構造4で抵抗することができる。
In this way, the steel frame seismic resistant structure 4 including the frame 5 and the Y-shaped brace including the shear panel 7 and the brace 8 can resist the deformation force of the opening 3.
そして、鉄筋コンクリートよりも強度が高い金属系の鉄
骨等で耐震構造4を構成しているので、鉄筋コンクリー
ト耐震壁に較べて軽く、建物重量を増やさない点で有利
である。このことによって、建物基礎の補強は一般に施
工が困難であるが、この耐震補強に付随させての当該基
礎補強工事の必要がない。さらに上記の基礎補強を行う
とすれば、これに伴って建物の重量が増加し、この建物
重量に比例して地震入力も増加することとなるが、軽量
な本実施例の耐震補強では補強後も地震入力がほとんど
変わらず、建物重量が増加する他の従来の補強工法に較
べ、補強効率が高い。
Further, since the seismic resistant structure 4 is composed of a metal-based steel frame or the like having a higher strength than reinforced concrete, it is lighter than a reinforced concrete earthquake resistant wall, and is advantageous in that the weight of the building is not increased. Due to this, it is generally difficult to reinforce the building foundation, but there is no need for the foundation reinforcement work accompanying this seismic reinforcement. Further, if the above-mentioned foundation reinforcement is performed, the weight of the building will increase accordingly, and the seismic input will increase in proportion to this building weight. The seismic input is almost unchanged, and the reinforcement efficiency is higher than other conventional reinforcement methods in which the building weight increases.
同様に、補強効率の点で言えば、鉄筋コンクリート耐震
壁を増設する補強工法では、窓や扉などを設けると耐震
性能が低下したが、本実施例では、耐震性能を減殺させ
ることなく、開口の設定が可能である。
Similarly, in terms of reinforcement efficiency, in the reinforcement method of adding a reinforced concrete earthquake-resistant wall, the seismic performance deteriorated when windows and doors were installed, but in this example, the seismic performance was not diminished and the opening Can be set.
また、四角形状の金属製の枠5で開口部3の内周面を支
持しつつ、変形応力を剪断パネル7とブレース8とで、
この枠5に分散伝達させることができる。さらに、一定
の地震力以上では剪断パネル7がRC造躯体よりも先に降
伏するように設定することで、ブレース8に座屈や降伏
が生じることを防止できる。したがって、本実施例のも
のは、従来の強度抵抗型のブレースと比べて靱性能がよ
いため、同一の耐震性能を得るには、枠5の強度を小さ
く設定してもよい。そのため、部材断面を小さくでき、
経済的であり、また重量増加を抑えることができ、補強
効率が向上するのである。さらに、鉄筋コンクリート躯
体との接合部分の応力も小さくなるので、当該接合部分
の強度も小さく設定でき、既存コンクリート躯体との接
合のために必要なアンカー9やスタッド10などの接合補
強材の量を低減することが可能で、施工が容易となり、
工期短縮や工費削減を図ることができる。
Further, while supporting the inner peripheral surface of the opening 3 by the rectangular metal frame 5, the shearing panel 7 and the brace 8 prevent deformation stress.
It can be distributed and transmitted to the frame 5. Further, by setting the shear panel 7 to yield before the RC structure above a certain level of seismic force, it is possible to prevent buckling or yielding of the brace 8. Therefore, the toughness of the present embodiment is better than that of the conventional strength / resistance type brace, so that the strength of the frame 5 may be set small in order to obtain the same seismic resistance. Therefore, the member cross section can be reduced,
It is economical, the increase in weight can be suppressed, and the reinforcing efficiency is improved. Furthermore, since the stress at the joint with the reinforced concrete frame is also small, the strength of the joint can be set to be small, and the amount of anchoring materials such as anchors 9 and studs 10 required for joining with the existing concrete frame can be reduced. Can be done, construction becomes easy,
It is possible to reduce the construction period and the construction cost.
また、新設RC造に補強構造を予め組み込む場合にも、枠
5側に通常のスタッド10を設けることで充分であり、同
様の効果を奏する。
Further, even when the reinforcing structure is previously incorporated in the new RC structure, it is sufficient to provide the normal stud 10 on the frame 5 side, and the same effect can be obtained.
さらに、剪断パネル7には、適度な強度と大きな靱性能
を別途設定することができるので、地震時に大きなエネ
ルギー吸収能を発揮させることができる。そして、剪断
パネル7に損傷を集中させることによって、建物全体に
加わる地震エネルギーの大部分を剪断パネル7に吸収さ
せることが可能であり、その結果、建物の応答変形を小
さくして被害を低減する、ダンパーとして機能する制振
効果も保有させることができ、RC造躯体の地震後の補修
も容易になる。即ち、剪断パネル7の交換で足りるの
で、補修が容易になる効果がある。
Furthermore, since appropriate strength and large toughness can be separately set in the shear panel 7, it is possible to exert a large energy absorption capacity during an earthquake. By concentrating the damage on the shear panel 7, most of the seismic energy applied to the entire building can be absorbed by the shear panel 7, and as a result, the response deformation of the building is reduced and damage is reduced. Also, it is possible to have a damping effect that functions as a damper, and it is easy to repair the RC structure after an earthquake. That is, since replacement of the shear panel 7 is sufficient, there is an effect that the repair becomes easy.
さらに、大地震が予知されたときにのみ、本実施例のよ
うな金属系耐震構造4をRC造開口部3に取り付けるよう
にし、通常はオープンスペースとして使用することもで
きる。
Furthermore, only when a large earthquake is predicted, the metal-based seismic resistant structure 4 as in this embodiment can be attached to the RC structure opening 3 and can be used as an open space normally.
また、枠5と開口部3との接合を撤去すれば、枠5を容
易に取り外せるので、ブレース8の傾斜角度や剪断パネ
ル7の取り付け位置を異にする他の耐震構造との取り換
えも簡単であり、さらに窓開口の位置や寸法の変更も行
うことができる。
Further, since the frame 5 can be easily removed by removing the joint between the frame 5 and the opening 3, it is easy to replace it with another seismic structure having a different inclination angle of the brace 8 and a mounting position of the shear panel 7. In addition, the position and size of the window opening can be changed.
RC造躯体の靱性能が良好であれば、金属系耐震構造4の
挙動に無駄がなくなり、特に有効である。
If the toughness of the RC structure is good, the behavior of the metal-based seismic resistant structure 4 is not wasted, which is particularly effective.
枠5とY型ブレースとから成る本実施例の耐震構造4を
RC造躯体のコンクリート打ち時に一体に取付ける場合に
は、上記耐震構造4とRC造躯体とを密に接続して一体化
できるので、互いの力の伝達が良好であるほか、格別の
接続一体化作業を要せず、良好な靱性能を確保できて地
震力を効果的に吸収できる。したがって、RC造躯体の断
面積もかなり小さく構成することが可能である。
The seismic resistant structure 4 of this embodiment including the frame 5 and the Y-shaped brace
When the RC structure is to be integrally mounted when concrete is poured, the seismic resistant structure 4 and the RC structure can be closely connected and integrated, so that mutual force transmission is good and a special connection integration No work is required, good toughness can be secured, and seismic force can be effectively absorbed. Therefore, it is possible to make the cross-sectional area of the RC structure considerably smaller.
以上のように本実施例の工法では、補強効率が高いた
め、補強すべき施工箇所を必要最小限に止めることがで
きる。すなわち、工期短縮や工費削減のみならず、使用
中の建物に対して施工する場合でも、事情に柔軟に対応
することが可能であり、特に建物の使用が中断できない
病院,旅館などの建物の施工には有利である。
As described above, according to the construction method of this embodiment, since the reinforcing efficiency is high, the construction site to be reinforced can be minimized. That is, not only the construction period and construction cost can be reduced, but also when constructing a building that is in use, it is possible to flexibly deal with the situation, and especially construction of a building such as a hospital or inn where the use of the building cannot be interrupted. Is advantageous to
なお、鉄骨鉄筋コンクリート造建物にも、同様に耐震要
素として組み込むことができ、鉄道橋および道路橋など
の土木構造物に対しても応用することができる。
In addition, it can be similarly incorporated into a steel-framed reinforced concrete building as a seismic element, and can be applied to civil engineering structures such as railway bridges and road bridges.
《効果》 以上要するに本発明によれば、新設の場合、補修の場合
いずれにおいても、RC造躯体の開口部を補強する際に、
当該開口部内に金属系耐震構造を収めて設置するように
したので、従来のように柱や梁の断面積を増加させる方
法と比較して、居住空間をより広く確保することができ
るとともに、断面積の増加に伴う重量増加もなくなる。
他方、従来の耐震壁を採用する方法と比較しても、本発
明の補強方法では靱性を期待できる金属系耐震構造で開
口部を補強しているので、耐震壁よりも軽量にして、よ
り効果的な耐震補強を確保することができる。さらに、
耐震壁において憂慮される開口の形成についても、本発
明に採用した金属系耐震構造は、枠と、この内部に三角
形状を呈して配設されるブレースおよび剪断パネルとか
ら構成されるので、これら相互間にはそもそも隙間が存
在しており、従って当該耐震構造の強度を減殺させるこ
となく、この隙間を利用して所望の開口を確保すること
ができる。
<< Effects >> In short, according to the present invention, in the case of new installation, in any case of repair, when reinforcing the opening of the RC structure,
Since the metal-based seismic resistant structure is installed inside the opening, it is possible to secure a wider living space and to cut the area compared to the conventional method of increasing the cross-sectional area of columns and beams. There is also no increase in weight due to the increase in area.
On the other hand, even when compared with the conventional method of adopting a seismic wall, the reinforcing method of the present invention is reinforced with a metal-based seismic structure that can be expected to have toughness, so it is lighter than a seismic wall and more effective. Seismic reinforcement can be secured. further,
As for the formation of an opening that may be a concern in the earthquake-resistant wall, the metal-based earthquake-resistant structure adopted in the present invention is composed of the frame and the brace and the shear panel arranged in a triangular shape inside the frame. Since there is a gap between them in the first place, it is possible to secure a desired opening by utilizing this gap without diminishing the strength of the earthquake-resistant structure.
さらに、本発明に採用している金属系耐震構造にあって
は、三角形の斜辺をなすブレースと、三角形の頂点で枠
の上辺との間に設けた剪断パネルとで、四角形状の枠内
に、Y型の靱性抵抗型のブレース構造を構成しているの
で、開口部に作用する地震力等の外力に対し、四角形状
の枠は応力を分散化させ、これによりRC躯体、ならびに
このRC躯体と枠との接合部分の損傷を防止することがで
き、またブレースは、開口部に作用する、同様な地震力
等の外力を引張力や圧縮力に変換し、これに抵抗するこ
とができ、さらに、剪断パネルは、枠とブレースとの間
に介在し、これら間に伝達されるエネルギーを吸収する
とともに、枠と連携して、当該剪断パネル周りに発生す
るモーメントや剪断力に抵抗することができる。従っ
て、地震力等の外力で開口部に変形力が作用しても、こ
れら枠、ブレースおよび剪断パネルで構成した金属系耐
震構造によって、RC造躯体を効果的に耐震補強すること
ができる。
Further, in the metal-based seismic resistant structure adopted in the present invention, a brace forming the hypotenuse of a triangle and a shear panel provided between the top of the frame at the apex of the triangle form a rectangular frame. , Y-type toughness-resistant brace structure is configured, so the square frame disperses stress against external force such as seismic force acting on the opening, which allows RC frame and this RC frame to be dispersed. It is possible to prevent damage to the joint between the frame and the frame, and the brace can convert external force such as seismic force acting on the opening into tensile force or compressive force and resist it. Further, the shear panel is interposed between the frame and the brace, absorbs energy transmitted between them, and cooperates with the frame to resist moment and shear force generated around the shear panel. it can. Therefore, even if a deforming force acts on the opening due to an external force such as seismic force, the RC structure can be effectively seismically reinforced by the metal-based seismic structure composed of these frames, braces and shear panels.
【図面の簡単な説明】[Brief description of drawings]
第1図は本発明に係るRC造の鉄骨系耐震構造を例示した
正面図、第2図は鉄骨系耐震構造の取付状態を示す断面
図、第3図は鉄骨系耐震構造の別態様を示す正面図、第
4図は別の実施例に係る正面図、第5図はその取付状態
を示す断面図である。 1……柱、2……梁 3……開口部、4……鉄骨系耐震構造 5……枠、6……スチフナー 7……剪断パネル、8……ブレース 9……アンカー、10……スタッド 11……モルタル、12……窓開口
FIG. 1 is a front view showing an example of an RC steel-frame-based earthquake-resistant structure according to the present invention, FIG. 2 is a cross-sectional view showing a mounting state of the steel-frame-based earthquake-resistant structure, and FIG. 3 shows another aspect of the steel-frame-based earthquake-resistant structure. A front view, FIG. 4 is a front view according to another embodiment, and FIG. 5 is a cross-sectional view showing its mounting state. 1 ... Pillar, 2 ... Beam 3 ... Aperture, 4 ... Steel frame seismic structure 5 ... Frame, 6 ... Stiffener 7 ... Shear panel, 8 ... Brace 9 ... Anchor, 10 ... Stud 11 …… Mortar, 12 …… Window opening

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】鉄筋コンクリート造躯体の被補強開口部内
    周面に沿わせて、該開口部内に収まる四角形状の枠を構
    成し、該枠の上辺から垂下させて剪断パネルを設けると
    ともに、該剪断パネルを頂点とし、かつ該枠の下辺部分
    が底辺となる三角形状をなすように、該枠の下辺から該
    剪断パネルに向かって斜めに立ち上げて当該三角形状の
    斜辺をなすブレースを設けて、金属系耐震構造を構成
    し、 上記枠の外周面と該開口部内周面との間を適宜な手段で
    接合することにより、該開口部内に該金属系耐震構造を
    固定することを特徴とするRC造躯体開口部の耐震補強方
    法。
    1. A quadrangular frame is formed along the inner peripheral surface of an opening to be reinforced of a reinforced concrete structure so as to fit within the opening, and a shear panel is provided so as to hang down from the upper side of the frame and the shear panel. And a bottom side of the frame to form a triangle shape having a bottom side, the brace forming the oblique side of the triangle is provided by obliquely rising from the bottom side of the frame toward the shear panel, A RC structure characterized in that the metal-based seismic resistant structure is fixed in the opening by joining the outer peripheral surface of the frame and the inner peripheral surface of the opening by an appropriate means. Seismic retrofitting method for building openings.
  2. 【請求項2】鉄筋コンクリート造躯体およびその開口部
    を新設形成するに際し、 該開口部内周面に沿わせて四角形状の枠を構成し、該枠
    の上辺から垂下させて剪断パネルを設けるとともに、該
    剪断パネルを頂点とし、かつ該枠の下辺部分が底辺とな
    る三角形状をなすように、該枠の下辺から該剪断パネル
    に向かって斜めに立ち上げて当該三角形状の斜辺をなす
    ブレースを設けて、金属系耐震構造を構成し、 該鉄筋コンクリート造躯体の開口部形成位置に上記金属
    系耐震構造を建て込みコンクリートを打設して、上記枠
    を該開口部内周面に一体的に密着固定させて、該金属系
    耐震構造を該開口部と一体に施工することを特徴とする
    RC造躯体開口部の耐震補強方法。
    2. When newly forming a reinforced concrete structure and its opening, a rectangular frame is formed along the inner peripheral surface of the opening, and a shear panel is provided so as to hang down from the upper side of the frame. Providing a brace that diagonally rises from the lower side of the frame toward the shear panel so as to form a triangular shape with the shear panel as the apex and the bottom side of the frame as the bottom side. , Constructing a metal-based seismic resistant structure, placing the metal-based seismic resistant structure at the opening forming position of the reinforced concrete structure, placing concrete, and fixing the frame integrally and closely to the inner peripheral surface of the opening. , The metal-based seismic resistant structure is integrally constructed with the opening
    Seismic retrofitting method for RC building openings.
JP27935188A 1988-11-07 1988-11-07 Seismic retrofitting method for RC structure opening Expired - Fee Related JPH0751803B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27935188A JPH0751803B2 (en) 1988-11-07 1988-11-07 Seismic retrofitting method for RC structure opening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27935188A JPH0751803B2 (en) 1988-11-07 1988-11-07 Seismic retrofitting method for RC structure opening

Publications (2)

Publication Number Publication Date
JPH02128035A JPH02128035A (en) 1990-05-16
JPH0751803B2 true JPH0751803B2 (en) 1995-06-05

Family

ID=17609960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27935188A Expired - Fee Related JPH0751803B2 (en) 1988-11-07 1988-11-07 Seismic retrofitting method for RC structure opening

Country Status (1)

Country Link
JP (1) JPH0751803B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2715711B2 (en) * 1991-07-01 1998-02-18 株式会社大林組 Eccentric brace structure with vibration suppression function
JP2715710B2 (en) * 1991-07-01 1998-02-18 株式会社大林組 Eccentric brace structure with vibration suppression function
JP5403901B2 (en) * 2007-11-16 2014-01-29 トヨタホーム株式会社 building
KR101760680B1 (en) 2015-11-23 2017-07-26 한국전력공사 Seismic reinforcing device

Also Published As

Publication number Publication date
JPH02128035A (en) 1990-05-16

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