JPH10148037A - Earthquake resistant reinforcing structure of existing building - Google Patents

Earthquake resistant reinforcing structure of existing building

Info

Publication number
JPH10148037A
JPH10148037A JP30845296A JP30845296A JPH10148037A JP H10148037 A JPH10148037 A JP H10148037A JP 30845296 A JP30845296 A JP 30845296A JP 30845296 A JP30845296 A JP 30845296A JP H10148037 A JPH10148037 A JP H10148037A
Authority
JP
Japan
Prior art keywords
frame
sub
building
existing building
horizontal member
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.)
Withdrawn
Application number
JP30845296A
Other languages
Japanese (ja)
Inventor
Masayoshi Matsubara
正芳 松原
Shoji Hayashi
章二 林
Kazuo Nagami
一夫 永見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Construction Co Ltd
Shimizu Corp
Original Assignee
Shimizu Construction Co Ltd
Shimizu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimizu Construction Co Ltd, Shimizu Corp filed Critical Shimizu Construction Co Ltd
Priority to JP30845296A priority Critical patent/JPH10148037A/en
Publication of JPH10148037A publication Critical patent/JPH10148037A/en
Withdrawn legal-status Critical Current

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  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve earthquake resistance by setting a sub-frame between the upper and lower beams of a building frame of an existing building, extending it in the upper and lower directions, making a pin joint of each upper and lower end to the beam, and integrally setting a horizontal member between a pair of two vertical members. SOLUTION: Each bracket 10 is connected to beam brackets provided on upward and downward steel framed beams 3 by a pin joint, and each vertical member 8 is rotatably connected to the upper and lower steel framed beams 3, 3 through pins 11 respectively. In this case, e.g. a horizontal member 9 welding both the ends to the vertical members 8, 8 is set to be positioned at the equivalent level or higher as the ceiling 12 of the floor. In addition, strength of the horizontal member is set lower than that of each vertical member 8, 8, and the building frame of the existing building is reinforced by a sub-frame 7. Furthermore, when excessive external force is acted by an earthquake, the horizontal frame 9 of the sub-frame 7 is previously yielded, and energy is absorbed. Other part of the building is controlled to suffer from damage as small as possible, and the earthquake resistance of the existing building can be improved.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、例えば既存のビル
等の耐震性を向上させるときに用いて好適な既存建物の
耐震補強構造に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic reinforcement structure of an existing building which is suitable for use in improving the seismic resistance of an existing building or the like.

【0002】[0002]

【従来の技術】従来より、既存のビル等の建物を取り壊
すことなく耐震性を向上させるには、建物の躯体を構成
する柱梁間に補強用のブレース材を取り付けたり、制振
壁を取り付ける等の補強が行われていた。
2. Description of the Related Art Conventionally, in order to improve seismic resistance without breaking down an existing building or the like, a reinforcing brace material is attached between columns and beams constituting a building frame, or a damping wall is attached. Reinforcement had been done.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上述し
たような従来の既存建物の耐震補強構造には、以下のよ
うな問題が存在する。まず、ブレース材を取り付ける耐
震補強構造においては、ブレース材が斜めに延在するた
め、通路や出入口等の開口部の確保の妨げとなることが
ある。また、制振壁を取り付ける耐震補強構造において
は、壁厚が厚くなり、建物内の床面積が減少してしま
う。このように、従来の耐震補強構造では、既存の建物
内のスペースが犠牲となってしまうという問題を抱えて
いる。さらに、特に耐震壁を設置する場合には補強に伴
って重量も増加するため、補強による効果が一部相殺さ
れてしまうという問題もある。これ以外にも、地震発生
時等に建物に作用するエネルギーは、建物内の場所によ
って異なっており、これに合わせて補強を図らなけれ
ば、耐震補強効果を有効に発揮することができなかった
り、必要以上の補強による無駄が生じるという問題もあ
る。本発明は、以上のような点を考慮してなされたもの
で、建物内のスペースの犠牲を最小限として、耐震性を
効率よく向上させることのできる既存建物の耐震補強構
造を提供することを課題とする。
However, the above-mentioned conventional seismic retrofit structure of an existing building has the following problems. First, in a seismic retrofit structure to which a brace material is attached, since the brace material extends obliquely, it may hinder the securing of openings such as passages and doorways. Further, in the seismic retrofitting structure to which the damping wall is attached, the wall thickness is increased, and the floor area in the building is reduced. As described above, the conventional earthquake-resistant reinforcement structure has a problem that the space in the existing building is sacrificed. Furthermore, especially when installing an earthquake-resistant wall, the weight increases with the reinforcement, and there is a problem that the effect of the reinforcement is partially offset. In addition to this, the energy that acts on the building at the time of an earthquake or the like differs depending on the location in the building, and if the reinforcement is not planned in accordance with this, it is not possible to effectively exert the seismic reinforcement effect, There is also a problem that waste is caused by reinforcement beyond necessity. The present invention has been made in view of the above points, and it is an object of the present invention to provide a seismic retrofit structure of an existing building that can efficiently improve seismic resistance while minimizing the sacrifice of space in the building. Make it an issue.

【0004】[0004]

【課題を解決するための手段】本発明は、既存の建物を
補強するため、該建物の躯体を構成する上下の梁間にサ
ブフレームが設けられ、該サブフレームが略H型をな
し、上下方向に延在して上下の各端部が前記梁にピン接
合された二本一対の鉛直部材と、これら二本の鉛直部材
間に一体に設けられた水平部材とから構成されているこ
とを特徴としている。
According to the present invention, in order to reinforce an existing building, a sub-frame is provided between upper and lower beams constituting a frame of the building, and the sub-frame has a substantially H-shape. And a pair of vertical members having upper and lower ends joined to the beam by pins, and a horizontal member integrally provided between the two vertical members. And

【0005】[0005]

【発明の実施の形態】以下、本発明に係る既存建物の耐
震補強構造の実施の形態の一例を、図1ないし図3を参
照して説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a seismic reinforcement structure for an existing building according to the present invention will be described below with reference to FIGS.

【0006】図1において、符号1はビル等の既存建物
の鉄骨造からなる躯体、2は鉄骨柱(柱)、3は鉄骨梁
(梁)、4は床、5は外壁、をそれぞれ示している。
In FIG. 1, reference numeral 1 denotes a steel frame of an existing building such as a building, 2 denotes a steel column (column), 3 denotes a steel beam (beam), 4 denotes a floor, and 5 denotes an outer wall. I have.

【0007】この図に示すように、既存建物の耐震補強
を図るため、躯体1の所定階にはサブフレーム7が複数
設置されている。各サブフレーム7は、略H型をなして
おり、当該階の上下にそれぞれ位置する鉄骨梁3,3と
同一の鉛直面内に位置するよう設けられている。そし
て、各サブフレーム7は、二本一対の鉛直部材8,8
と、これら鉛直部材8,8間に架設された水平部材9と
から構成されている。
As shown in FIG. 1, a plurality of sub-frames 7 are installed on a predetermined floor of the skeleton 1 in order to enhance the seismic resistance of an existing building. Each sub-frame 7 has a substantially H shape, and is provided so as to be located in the same vertical plane as the steel beams 3 and 3 located above and below the floor. Each of the sub-frames 7 has a pair of two vertical members 8,8.
And a horizontal member 9 provided between the vertical members 8.

【0008】各鉛直部材8は、鋼材からなり、その上下
の端部にはそれぞれブラケット10が設けられてる。そ
して、各ブラケット10は、上方あるいは下方の鉄骨梁
3に一体に設けられた図示しない梁側ブラケットに、ピ
ン11を介して接合されている。このピン11は、鉄骨
梁3が延在する方向と直交する水平方向に軸線を有して
いる。これによって、各鉛直部材8は、上下の鉄骨梁
3,3に、それぞれピン11を介して回動自在に連結さ
れ、上下の鉄骨梁3,3の軸線方向(水平方向)におけ
る相対変位を許容するようになっている。
Each vertical member 8 is made of a steel material, and has brackets 10 at upper and lower ends thereof. Each bracket 10 is joined via a pin 11 to a beam-side bracket (not shown) provided integrally with the upper or lower steel beam 3. This pin 11 has an axis in a horizontal direction orthogonal to the direction in which the steel beam 3 extends. Thereby, each vertical member 8 is rotatably connected to the upper and lower steel beams 3, 3 via the pin 11, respectively, and allows relative displacement of the upper and lower steel beams 3, 3 in the axial direction (horizontal direction). It is supposed to.

【0009】水平部材9は、鋼材からなり、その両端部
が左右の鉛直部材8,8に溶接されている。この水平部
材9は、例えば当該階の天井12と同レベルあるいはそ
れ以上のレベルに位置するよう設けられている。そし
て、水平部材9は、その強度が、両側の鉛直部材8,8
よりも低くなるよう設定されている。
The horizontal member 9 is made of a steel material, and both ends thereof are welded to the left and right vertical members 8,8. The horizontal member 9 is provided, for example, at the same level as or higher than the ceiling 12 of the floor. The horizontal member 9 has a strength equal to that of the vertical members 8 on both sides.
It is set to be lower than

【0010】上記サブフレーム7は、エネルギーが集中
する層や箇所に設置するのが効果的である。
It is effective to install the sub-frame 7 in a layer or a place where energy is concentrated.

【0011】上述した既存建物の耐震補強構造では、鉄
骨造の躯体1の所定階に、二本一対の鉛直部材8,8
と、これらの間に架設された水平部材9とからなるサブ
フレーム7が設けられた構成となっている。そして、各
鉛直部材8はその上下の端部が、当該階の上下に位置す
る鉄骨梁3,3にそれぞれピン11を介して回動自在に
連結された構成となっている。これにより、このサブフ
レーム7によって既存建物の躯体1自体の補強を図るこ
とができる。
In the above-described seismic retrofit structure of an existing building, a pair of two vertical members 8, 8 are provided on a predetermined floor of a steel frame 1.
And a sub-frame 7 including a horizontal member 9 laid between them. Each vertical member 8 is configured such that its upper and lower ends are rotatably connected to steel beams 3 and 3 located above and below the floor via pins 11 respectively. Thereby, the skeleton 1 of the existing building can be reinforced by the sub-frame 7.

【0012】さらに、地震等により過大な外力が作用す
ると、その水平方向成分のエネルギーにより、互いに上
下に位置する鉄骨梁3,3が水平方向に相対変位する。
サブフレーム7は両側の鉛直部材8,8が上下の端部に
おいてピン11によって回動自在に連結されているの
で、鉄骨梁3,3の相対変位により、水平部材9とその
両側の鉛直部材8,8との接合部Aにエネルギーが集中
して作用することとなる。そして、この接合部Aに作用
するエネルギーが所定レベル以上に大きくなると、水平
部材9がその端部において先行降伏し、エネルギーを吸
収するようになっている。これにより、躯体1の他の部
分に被害が及ぶのを最小限に抑えることができ、この結
果、躯体1の耐震性を向上させることができる。
Further, when an excessive external force acts due to an earthquake or the like, the steel beams 3 and 3 positioned above and below each other are relatively displaced in the horizontal direction due to the energy of the horizontal component.
Since the vertical members 8 on both sides of the sub-frame 7 are rotatably connected by pins 11 at upper and lower ends, the horizontal member 9 and the vertical members 8 on both sides thereof are moved by the relative displacement of the steel beams 3. , 8 at the joint A. When the energy acting on the joint A becomes greater than or equal to a predetermined level, the horizontal member 9 precedes at its end and absorbs the energy. Thereby, damage to other parts of the frame 1 can be minimized, and as a result, the earthquake resistance of the frame 1 can be improved.

【0013】このときに、サブフレーム7は、ブレース
材のように斜めに延在する部材もないので、通路や出入
口等の開口部の確保の妨げとなったり、天井裏や床下の
配管等と干渉するのを回避することができる。
At this time, since the sub-frame 7 does not have a member extending obliquely like a brace material, it does not prevent securing of an opening such as a passage or an entrance or exit, and may not be connected to piping behind the ceiling or under the floor. Interference can be avoided.

【0014】さらに、水平部材9の材料や降伏点等を変
えることによって、サブフレーム7におけるエネルギー
吸収能力を容易に調整することができる。したがって、
このようなサブフレーム7を、躯体1において耐力の弱
い層や位置、地震等の外力によるエネルギーが集中する
箇所に設置し、さらに設置する場所毎に応じてサブフレ
ーム7のエネルギー吸収能力を変えることによって、耐
震補強効果を無駄なく効率的に発揮することができる。
Further, by changing the material, yield point, and the like of the horizontal member 9, the energy absorbing ability of the subframe 7 can be easily adjusted. Therefore,
Such a sub-frame 7 is installed in a layer or a position where the proof strength is weak in the skeleton 1 or in a place where energy due to external force such as an earthquake is concentrated, and further, the energy absorption capacity of the sub-frame 7 is changed according to each installation place. Thereby, the seismic reinforcement effect can be efficiently exhibited without waste.

【0015】加えて、このような鋼材からなるサブフレ
ーム7を用いることにより、従来のように耐震壁を設け
る場合等に比較して、補強に伴う重量の増加を抑えるこ
とも可能であり、この点においても耐震補強効果を効率
的に発揮することができる。
In addition, the use of such a sub-frame 7 made of steel material makes it possible to suppress an increase in weight associated with reinforcement, as compared with a conventional case in which an earthquake-resistant wall is provided. In this respect, the effect of the seismic reinforcement can be efficiently exhibited.

【0016】また、このようなサブフレーム7は、鉄骨
梁3にブラケット10やピン11等を用いて容易に取り
付けることが可能であるので、既存建物の使用を中断す
る期間を最低限に抑えて短工期かつ低コストで設置する
ことが可能である。しかも、このサブフレーム7は、壁
内に収めることも可能であり、室内スペースを犠牲にす
ることもない。
Further, since such a sub-frame 7 can be easily attached to the steel beam 3 using the brackets 10 and the pins 11, etc., the period during which the use of the existing building is interrupted can be minimized. It can be installed in a short construction period and at low cost. Moreover, the sub-frame 7 can be accommodated in a wall, without sacrificing the indoor space.

【0017】なお、上記実施の形態において、サブフレ
ーム7を構成する鉛直部材8,水平部材9の断面形状や
材質は何ら問うものではなく、例えば断面視ロ字状,円
形,H型等のものを適宜採用すればよい。
In the above-described embodiment, the cross-sectional shapes and materials of the vertical member 8 and the horizontal member 9 constituting the sub-frame 7 do not matter at all. May be appropriately adopted.

【0018】また、上記サブフレーム7は、躯体1内の
全体に設置してもよいが、その主旨からして、耐力の弱
い層、位置、地震等の外力によるエネルギーが集中する
箇所に設置するのが望ましく、さらには箇所毎にエネル
ギー吸収能力が最適となるように水平部材9の強度を設
定するのが好ましい。さらに、例えば平面視すると一方
向のみに長い長方形の建物等においては、建物の短手方
向に延在する鉄骨梁3にのみサブフレーム7を設置する
ようにしても良く、これにより耐震補強効果を効果的に
発揮することができる。
The sub-frame 7 may be installed on the whole inside of the skeleton 1. However, from the point of view, the sub-frame 7 is installed on a layer having a low strength, a position, or a place where energy due to external force such as an earthquake is concentrated. It is preferable that the strength of the horizontal member 9 be set so that the energy absorption capacity is optimized for each location. Furthermore, for example, in a rectangular building or the like that is long only in one direction when viewed in a plan view, the sub-frame 7 may be installed only on the steel beam 3 extending in the short direction of the building, thereby improving the seismic reinforcement effect. It can be used effectively.

【0019】さらに、上記実施の形態で示したサブフレ
ーム7を、従来より耐震補強を図るために用いていた例
えばチューンドマスダンパー(質量同調ダンパー;いわ
ゆるTMD)や制振壁等、各種制振工法と組み合わせて
用いるようにしてもよい。例えば、躯体1に、サブフレ
ーム7に加えてTMDと制振壁を組み合わせて設置する
と、図2に示すように、躯体1に地震等の外力が作用し
た場合に、サブフレーム7,TMD,制振壁とでは制振
効果を発揮する領域がそれぞれ異なるため、これらによ
る制振効果を効果的に発揮することが可能である。さら
に、図3に示すように、これらサブフレーム7,TM
D,制振壁を組み合わせることにより、地震等の外力に
よる躯体1の変形を低減することができる。しかもサブ
フレーム7を元々耐力が弱い特定階に設置することによ
って、損傷を特定階に集中させ、他の層の保全を図るこ
とも可能である。
Further, the sub-frame 7 shown in the above-described embodiment can be used for various vibration damping methods such as a tuned mass damper (mass tuning damper; so-called TMD) and a vibration damping wall, which have been conventionally used for reinforcing earthquake resistance. May be used in combination. For example, if a TMD and a damping wall are installed on the skeleton 1 in addition to the sub-frame 7, as shown in FIG. 2, when an external force such as an earthquake acts on the skeleton 1, the sub-frame 7, the TMD, Since the region in which the vibration damping effect is exerted differs from the vibration wall, the vibration damping effect by these can be effectively exerted. Further, as shown in FIG.
D, By combining the damping walls, it is possible to reduce the deformation of the skeleton 1 due to an external force such as an earthquake. Moreover, by installing the sub-frame 7 on a specific floor having originally low strength, it is possible to concentrate the damage on the specific floor and to maintain the other layers.

【0020】これ以外にも、例えば躯体1は鉄骨造に限
定するものではなく、サブフレーム7を容易に設置する
ことができるのであれば、鉄骨鉄筋コンクリート造、鉄
筋コンクリート造等であってもよい。
In addition to this, for example, the frame 1 is not limited to a steel structure, and may be a steel frame reinforced concrete structure, a reinforced concrete structure, or the like as long as the subframe 7 can be easily installed.

【0021】[0021]

【発明の効果】以上説明したように、本発明の既存建物
の耐震補強構造によれば、上下の梁間に略H型のサブフ
レームが設けられ、このサブフレームが、上下の各端部
がそれぞれ梁にピン接合された二本一対の鉛直部材と、
これら二本の鉛直部材間に一体に設けられた水平部材と
からなる構成となっている。このサブフレームによって
既存建物の躯体自体の補強を図ることができ、さらに地
震等により過大な外力が作用したときには、サブフレー
ムの水平部材が先行降伏することによってエネルギーを
吸収することができる。このようにしてサブフレームで
エネルギーを集中して吸収させることによって、建物の
他の部分に被害が及ぶのを最小限に抑えることができ、
この結果、既存建物の耐震性を向上させることができ
る。このときに、サブフレームは、上下の梁間に取り付
けるのみでよく、ブレース材のように斜めに延在する部
材もないので、通路や出入口等の開口部の確保の妨げと
なったり、天井裏や床下の配管等と干渉するのを回避す
ることができる。さらに、サブフレームの水平部材の材
料や降伏点等を変えることによって、エネルギー吸収能
力を容易に調整することができる。したがって、同じ建
物内においても、サブフレームを設置する場所毎にエネ
ルギー吸収能力を変えて設定することによって、耐震補
強効果を無駄なく効率的に発揮することができる。加え
て、サブフレームを用いることにより、従来のように耐
震壁を設ける場合等に比較して、補強に伴う重量の増加
を抑えることも可能であり、この点においても耐震補強
効果を効率的に発揮することができる。
As described above, according to the seismic retrofit structure of the existing building of the present invention, a substantially H-shaped sub-frame is provided between the upper and lower beams, and the sub-frame has upper and lower ends respectively. A pair of vertical members pin-joined to the beam,
The horizontal member is provided integrally between the two vertical members. With this sub-frame, the frame itself of the existing building itself can be reinforced, and when an excessive external force is applied due to an earthquake or the like, the horizontal member of the sub-frame can absorb energy by precedingly yielding. By focusing and absorbing energy in the subframe in this way, damage to other parts of the building can be minimized,
As a result, the seismic resistance of the existing building can be improved. At this time, the sub-frame only needs to be attached between the upper and lower beams, and there is no obliquely extending member such as a brace material. It is possible to avoid interference with pipes under the floor. Further, the energy absorbing ability can be easily adjusted by changing the material, yield point, and the like of the horizontal member of the subframe. Therefore, even in the same building, the seismic reinforcement effect can be efficiently exhibited without waste by changing and setting the energy absorption capacity for each place where the subframe is installed. In addition, by using subframes, it is possible to suppress the increase in weight due to reinforcement compared to the case where a seismic wall is provided as in the past, etc. Can be demonstrated.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に係る既存建物の耐震補強構造を適用
した躯体の一例を示す立断面図である。
FIG. 1 is a vertical sectional view showing an example of a skeleton to which an earthquake-resistant reinforcement structure for an existing building according to the present invention is applied.

【図2】 前記既存建物の耐震補強構造と合わせて他の
制振工法を適用した場合に、各工法で耐震補強効果を発
揮する領域を示す図である。
FIG. 2 is a diagram illustrating a region where each method of construction exhibits an anti-seismic reinforcement effect when another vibration control method is applied in combination with the seismic reinforcement structure of the existing building.

【図3】 同、各工法による変形の低減度合いを示す図
である。
FIG. 3 is a diagram showing the degree of reduction of deformation by each method.

【符号の説明】[Explanation of symbols]

3 鉄骨梁(梁) 7 サブフレーム 8 鉛直部材 9 水平部材 3 Steel beam (beam) 7 Sub-frame 8 Vertical member 9 Horizontal member

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 既存の建物を補強するため、該建物の躯
体を構成する上下の梁間にサブフレームが設けられ、該
サブフレームが略H型をなし、上下方向に延在して上下
の各端部が前記梁にピン接合された二本一対の鉛直部材
と、これら二本の鉛直部材間に一体に設けられた水平部
材とから構成されていることを特徴とする既存建物の耐
震補強構造。
To reinforce an existing building, a sub-frame is provided between upper and lower beams constituting a frame of the building, and the sub-frame has a substantially H-shape and extends in a vertical direction to extend each of the upper and lower beams. A seismic reinforcement structure for an existing building, comprising: a pair of vertical members having ends joined to the beam by pins; and a horizontal member integrally provided between the two vertical members. .
JP30845296A 1996-11-19 1996-11-19 Earthquake resistant reinforcing structure of existing building Withdrawn JPH10148037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30845296A JPH10148037A (en) 1996-11-19 1996-11-19 Earthquake resistant reinforcing structure of existing building

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30845296A JPH10148037A (en) 1996-11-19 1996-11-19 Earthquake resistant reinforcing structure of existing building

Publications (1)

Publication Number Publication Date
JPH10148037A true JPH10148037A (en) 1998-06-02

Family

ID=17981201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30845296A Withdrawn JPH10148037A (en) 1996-11-19 1996-11-19 Earthquake resistant reinforcing structure of existing building

Country Status (1)

Country Link
JP (1) JPH10148037A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015094077A (en) * 2013-11-08 2015-05-18 株式会社竹中工務店 Column reinforcement structure
JP2016108911A (en) * 2014-12-10 2016-06-20 株式会社竹中工務店 Earthquake resistant wall structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015094077A (en) * 2013-11-08 2015-05-18 株式会社竹中工務店 Column reinforcement structure
JP2016108911A (en) * 2014-12-10 2016-06-20 株式会社竹中工務店 Earthquake resistant wall structure

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