JP2004225309A

JP2004225309A - Building structure

Info

Publication number: JP2004225309A
Application number: JP2003012727A
Authority: JP
Inventors: Akio Kono; 昭雄河野; Hidenori Tanaka; 秀宣田中; Michio Ito; 倫夫伊藤
Original assignee: Hitachi Metals Techno Ltd
Current assignee: Senqcia Corp
Priority date: 2003-01-21
Filing date: 2003-01-21
Publication date: 2004-08-12
Anticipated expiration: 2023-01-21
Also published as: JP3793510B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building structure which is inexpensive and can be easily constructed and replaced for enhancing the earthquake resistance of the structure and controlling vibration. <P>SOLUTION: A preyielding member 5 is installed at the end of a butter brace 7 put in the joint between a column 1 and a beam 3. The main body 8 of the butter brace 7 is made of an ordinary steel and the preyielding member 5 is made of a material with a lower yield point than the main body 8 of the butter brace 7, a low-yield point steel for instance. The main body 21 of the preyielding member 5 has an arched shape and arranged to form a space 39 between the surfaces of the column 1 and the beam 3. The preyoeld member 5 is fixed to the column 1 or the beam 3 through a mounting member 25, and also fixed to a mounting hardware 17 of the butter brace 7 through a mounting member 27. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、建築構造に関するものである。
【０００２】
【従来の技術】
従来、柱と梁を有する門型の構造物の耐震性を高めるために、筋交や方杖が用いられている。また、構造物の制振を行うために、方杖の一部に粘弾性ダンパやオイルダンパを設けることがある（例えば、特許文献１、特許文献２参照）。
【０００３】
【特許文献１】
特開２００２−２７６０７４号公報
【特許文献２】
特開２０００−３２０１７９号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、壁面に筋交を設置した場合、窓等の設置位置が制限される。また、粘弾性ダンパやオイルダンパを用いる場合、取付や取替などの施工が複雑になる。
【０００５】
本発明は、このような問題に鑑みてなされたもので、その目的とするところは、構造物の耐震性を高め、かつ制振を行うために、安価で、取付や取替が容易な建築構造を提供することにある。
【０００６】
【課題を解決するための手段】
前述した目的を達成するための第１の発明は、構造物の柱梁接合部近傍に方杖を設置し、荷重負荷時に前記方杖よりも先に降伏する先行降伏部材を前記方杖の端部に設けることを特徴とする建築構造である。
【０００７】
荷重負荷時に先行降伏部材を方杖よりも先に降伏させるには、▲１▼方杖を普通鋼材で、先行降伏部材を普通鋼材より降伏点の低い材料で形成する。普通鋼材より降伏点の低い材料とは、低降伏点鋼や、鉛、アルミニウム、銅等の降伏点が低い他の材料である。
【０００８】
または、▲２▼先行降伏部材の断面積を方杖の断面積よりも小さくすることにより、先行降伏部材を方杖より先に降伏させることが可能となる。さらに、▲３▼先行降伏部材を方杖よりも面外変形しやすい形状に形成してもよい。面外変形しやすい形状とは、柱または梁と本体との間に空間が形成されるような箱状、中空半球状、アーチ状等である。
【０００９】
先行降伏部材は、方杖の柱側と梁側のいずれかの端部、または両端部に設置される。先行降伏部材が方杖の片端に設けられる場合、先行降伏部材と方杖の他端が構造物に固定される。先行降伏部材が方杖の両端に設けられる場合、先行降伏部材が構造物に固定される。先行降伏部材や方杖の固定には、必要に応じて各種の取付用部材を用いる。方杖または先行降伏部材と構造物の接合部は、方杖を設置する梁または柱の一区間の長さをＡとして、最も近い柱梁接合部から０．０５Ａ〜０．４５Ａの位置に配置される。
【００１０】
第１の発明では、建築物の柱梁接合部近傍に方杖を設置し、荷重負荷時に方杖よりも先に降伏する先行降伏部材を方杖の端部に設ける。方杖と先行降伏部材を構造物に設置する際には、両端または一端に先行降伏部材を設置した方杖を柱梁に設置する。または、柱梁に先行降伏部材を設置した後、方杖を設置してもよい。
【００１１】
【発明の実施の形態】
以下、図面に基づいて、本発明の本実施の形態について詳細に説明する。図１は、柱１と梁３の立面図を示す。柱１、梁３は、例えば、鉄骨造、鉄筋コンクリート造、木造等とする。図１に示すように、柱１と梁３の接合部には、方杖７が設けられる。方杖７は、本体８と、両端部に設けられた取付用金物１７（図２）からなる。方杖７の端部には、先行降伏部材５が設けられる。
【００１２】
梁３の一区間の長さ９がＬのとき、方杖７の梁３側の端部に設けられる先行降伏部材５の設置位置と柱１の中心との距離１１は、０．０５Ｌから０．４５Ｌとするのが好ましい。また、柱１の一区間の長さ１３がＨのとき、方杖７の柱１側の端部に設けられる先行降伏部材５の設置位置と梁３の中心との距離１５は、０．０５Ｈから０．４５Ｈとするのが好ましい。
【００１３】
図２は、柱１と梁３の接合部付近の立面図、図３は、先行降伏部材５と方杖７の接合部付近の立面図、図４は、先行降伏部材５の斜視図を示す。図２は、図１のＡに示す部分の拡大図である。図３は、図２の矢印Ｂに示す方向から見た図である。
【００１４】
図２、図３に示すように、方杖７の本体８の両端部に設けられた取付用金物１７は、本体８と先行降伏部材５とを接合するための部材であり、ボルト穴（図示せず）を有する。方杖７の本体８の材質は、例えば普通鋼材である。本体８の断面は任意の形状とし、例えば、矩形、円形、Ｈ型等である。
【００１５】
図３、図４に示すように、先行降伏部材５は、本体２１、取付用部材２５、取付用部材２７等で構成される。本体２１は、長方形板状の部材を、断面が半円形のアーチ状に湾曲させたものである。先行降伏部材５の本体２１の材質は、方杖７の本体８よりも降伏点の低い材料であり、例えば低降伏点鋼や、降伏点の低い鉛、アルミニウム、銅等である。
【００１６】
第１の取付用部材である取付用部材２５は、本体２１のアーチの側端部３３に、アーチの軸方向、すなわち図４の矢印Ｄに示す方向に沿って設けられる。取付用部材２５は、ボルト穴２３を有する。取付用部材２５は、先行降伏部材５を柱１や梁３に取付けるための部材である。
【００１７】
第２の取付用部材である取付用部材２７は、本体２１のアーチの頂部である中央部３１に、矢印Ｄに示す方向に沿って設けられる。取付用部材２７は、ボルト穴２９を有する。取付用部材２７は、先行降伏部材５に方杖７を取付けるための部材である。
【００１８】
図２、図３に示すように、先行降伏部材５を梁３（柱１）に固定するには、取付用部材２５を梁３（柱１）に接触させ、取付用部材２５のボルト穴２３にボルト３７を挿入し、ナット３５で締め付ける。また、方杖７を先行降伏部材５に固定するには、取付用金物１７を取付用部材２７に重ね合わせ、取付用部材２７のボルト穴２９と取付用金物１７のボルト穴（図示せず）にボルト４１を挿入し、ナット１９で締め付ける。先行降伏部材５の本体２１と梁３（柱１）との間には、空間３９が形成される。
【００１９】
方杖７と先行降伏部材５を梁３（柱１）に設置する際には、両端または一端に先行降伏部材５を固定した方杖７を梁３（柱１）に固定する。または、梁３（柱１）に先行降伏部材５を固定した後、先行降伏部材５に方杖７を固定してもよい。
【００２０】
上述したように、先行降伏部材５は、方杖７の本体８より降伏点の低い低降伏点鋼等で形成される。低降伏点鋼は、低い設定荷重で確実に降伏し、塑性変形や繰り返し変形性能に優れる。先行降伏部材５を低降伏点鋼とすることで、方杖７に荷重がかかると、本体８が変形する前に、先行降伏部材５の本体２１が面外方向、すなわち図３の矢印Ｃに示す方向に変形し、エネルギを吸収する。面外変形は、小さな部材での大きな塑性変形が得られ、大きなエネルギを吸収することができる。
【００２１】
このように、本実施の形態では、先行降伏部材５が端部に設けられた方杖７を用いて建築構造を構成する。これにより、構造物の制振を行うことができる。また、耐震補強に用いても良い。
【００２２】
従来のブレース型ダンパーは、柱１と梁３に囲まれた壁面に形成される窓を遮るが、本実施の形態では、図１を用いて説明したように、先行降伏部材５の設置位置と柱１の中心との距離１１を０．０５Ｌから０．４５Ｌ、先行降伏部材５の設置位置と梁３の中心との距離１５を０．０５Ｈから０．４５Ｈとし、部材長が従来のブレースに比べて短い方杖７を設置することにより、窓の設置位置の自由度が高まり、方杖７の材料費が安価となる。
【００２３】
本実施の形態では、大地震後などにおいて本来の機能が失われた場合には、先行降伏部材５のみを取り替える。先行降伏部材５は、小型であり、柱１や梁３、方杖７にボルトで接合されるため、取替えが容易である。
【００２４】
なお、本実施の形態では、先行降伏部材５を方杖７の両端に設置したが、方杖７の一端のみに設置してもよい。この場合、方杖７の他端は、直接柱１や梁３に固定される。
【００２５】
また、先行降伏部材５の形状は、図１から図４に示すものに限らない。以下に、他の形状の先行降伏部材の例を示す。図５は、先行降伏部材５ａの斜視図を示す。先行降伏部材５ａは、本体２１ａ、取付用部材２５ａ、取付用部材２７ａ等で構成される。本体２１ａは、長方形板状の部材を、断面がホームベース形のアーチ状に湾曲させたものである。本体２１ａの材質は、方杖７の本体８よりも降伏点の低い材料であり、例えば低降伏点鋼、鉛、アルミニウム、銅等である。
【００２６】
第１の取付用部材である取付用部材２５ａは、本体２１ａのアーチの側端部３３ａに、アーチの軸方向に沿って設けられる。取付用部材２５ａは、ボルト穴２３ａを有する。第２の取付用部材である取付用部材２７ａは、本体２１ａのアーチの頂部である中央部３１ａに、アーチの軸方向に沿って設けられる。取付用部材２７ａは、ボルト穴２９ａを有する。
【００２７】
図６は、先行降伏部材５ｂの斜視図を示す。先行降伏部材５ｂは、本体２１ｂ、取付用部材２５ｂ、取付用部材２７ｂ等で構成される。本体２１ｂは、長方形板状の部材を、断面が三角形のアーチ状に湾曲させたものである。本体２１ｂの材質は、方杖７の本体８よりも降伏点の低い材料であり、例えば低降伏点鋼、鉛、アルミニウム、銅等である。
【００２８】
第１の取付用部材である取付用部材２５ｂは、本体２１ｂのアーチの側端部３３ｂに、アーチの軸方向に沿って設けられる。取付用部材２５ｂは、ボルト穴２３ｂを有する。第２の取付用部材である取付用部材２７ｂは、本体２１ｂのアーチの頂部である中央部３１ｂに、アーチの軸方向に沿って設けられる。取付用部材２７ｂは、ボルト穴２９ｂを有する。
【００２９】
図７、図８は、それぞれ、先行降伏部材５ｃ、先行降伏部材５ｄの斜視図を示す。図７に示すように、先行降伏部材５ｃは、本体２１ｃ、取付用部材２５ｃ、取付用部材２７ｃ等で構成される。また、図８に示すように、先行降伏部材５ｄは、本体２１ｄ、取付用部材２５ｄ、取付用部材２７ｄ等で構成される。
【００３０】
本体２１ｃ、本体２１ｄは、長方形板状の部材を、断面が矩形のアーチ状に湾曲させたものである。本体２１ｃ、本体２１ｄの材質は、方杖７の本体８よりも降伏点の低い材料であり、例えば低降伏点鋼、鉛、アルミニウム、銅等である。本体２１ｃは、図７に示すように一定の部材厚であり、本体２１ｄは、図８に示すように、本体２１ｃの部材の厚みを直線的、曲線的に変化させたものである。
【００３１】
先行降伏部材５ｃでは、第１の取付用部材である取付用部材２５ｃは、本体２１ｃのアーチの側端部３３ｃに、アーチの軸方向に沿って設けられる。取付用部材２５ｃは、ボルト穴２３ｃを有する。第２の取付用部材である取付用部材２７ｃは、本体２１ｃのアーチの頂部である中央部３１ｃに、アーチの軸方向に沿って設けられる。取付用部材２７ｃは、ボルト穴（図示せず）を有する。
【００３２】
先行降伏部材５ｄでは、第１の取付用部材である取付用部材２５ｄは、本体２１ｄのアーチの側端部３３ｄに、アーチの軸方向に沿って設けられる。取付用部材２５ｄは、ボルト穴２３ｄを有する。第２の取付用部材である取付用部材２７ｄは、本体２１ｄのアーチの頂部である中央部３１ｄに、アーチの軸方向に沿って設けられる。取付用部材２７ｄは、ボルト穴（図示せず）を有する。
【００３３】
図９は、先行降伏部材５ｅの斜視図を示す。先行降伏部材５ｅは、本体２１ｅ、取付用部材２５ｅ、取付用部材２７ｅ等で構成される。本体２１ｅは、長方形板状の部材を、中空の半球状に湾曲させたものである。本体２１ｅの材質は、例えば方杖７の本体８よりも降伏点の低い材料であり、例えば低降伏点鋼、鉛、アルミニウム、銅等である。
【００３４】
第１の取付用部材である取付用部材２５ｅは、本体２１ｅの半球の側端部３３ｅに、半球の周方向に沿って設けられる。取付用部材２５ｅは、ボルト穴２３ｅを有する。第２の取付用部材である取付用部材２７ｅは、本体２１ｅの半球の頂部である中央部３１ｅに設けられる。取付用部材２７ｅは、ボルト穴２９ｅを有する。
【００３５】
先行降伏部材５ａ、５ｂ、５ｃ、５ｄ、５ｅは、取付用部材２５ａ、２５ｂ、２５ｃ、２５ｄ、２５ｅのボルト穴２３ａ、２３ｂ、２３ｃ、２３ｄ、２３ｅを介して、梁３や柱１に固定される。また、取付用部材２７ａ、２７ｂ、２７ｃ、２７ｄ、２７ｅのボルト穴２９ａ、２９ｂ、２９ｅ等を介して、方杖７の本体８に固定される。
【００３６】
先行降伏部材５ａ、５ｂ、５ｃ、５ｄ、５ｅを用いた場合、方杖７に荷重がかかると、方杖７が変形する前に、先行降伏部材５ａ、５ｂ、５ｃ、５ｄ、５ｅの本体２１ａ、２１ｂ、２１ｃ、２１ｄ、２１ｅが面外方向に変形し、エネルギを吸収する。先行降伏部材５ａ、５ｂ、５ｃ、５ｄ、５ｅを端部に有する方杖７を用いた建築構造においても、先行降伏部材５を端部に有する方杖７を用いた建築構造と同様の効果が得られる。
【００３７】
先行降伏部材５の取付用部材２５、取付用部材２７の形状や、ボルト穴２３、ボルト穴２９の数量、方杖７を柱１や梁３に固定するための構造は、図１から図４に示すものに限らない。図１０は、方杖取付部材４３を用いた場合の柱１と梁３の接合部付近の立面図である。図１０では、先行降伏部材５が、方杖取付部材４３を介して柱１や梁３に固定される。
【００３８】
方杖７の設置位置は、図１に示した位置に限らない。図１１は、床側に方杖を設置した場合の柱１と梁３の立面図である。図１では、方杖７を柱１と梁３で囲まれた区画の天井側に設置したが、図１１に示すように、柱１と梁３で囲まれた区画の床側に設置しても良い。また、天井側と床側の双方に設置してもよい。
【００３９】
この場合も、方杖７の材料の使用量を減らし、窓の設置位置の自由度を高める効果を得るため、方杖７の梁３側の端部に設けられる先行降伏部材５の設置位置と柱１の中心との距離１１を０．０５Ｌから０．４５Ｌ（Ｌは梁３の長さ９）、とし方杖７の柱１側の端部に設けられる先行降伏部材５の設置位置と梁３の中心との距離１５を０．０５Ｈから０．４５Ｈ（Ｈは柱１の長さ１３）とするのが好ましい。
【００４０】
図１から図１０では、方杖７の本体８と異なる材質で先行降伏部材５を形成したが、先行降伏部材５を本体８と同様の材質としてもよい。方杖７と先行降伏部材５を同一材料で形成する場合、方杖７の端部の断面を本体８の断面よりも小さくして先行降伏部材５を形成してもよい。
【００４１】
【発明の効果】
以上、詳細に説明したように、本発明によれば、構造物の耐震性を高め、かつ制振を行うために、安価で、取付や取替が容易な建築構造を提供できる。
【図面の簡単な説明】
【図１】柱１と梁３の立面図
【図２】柱１と梁３の接合部付近の立面図
【図３】先行降伏部材５と方杖７の本体８との接合部
【図４】先行降伏部材５の斜視図
【図５】先行降伏部材５ａの斜視図
【図６】先行降伏部材５ｂの斜視図
【図７】先行降伏部材５ｃの斜視図
【図８】先行降伏部材５ｄの斜視図
【図９】先行降伏部材５ｅの斜視図
【図１０】柱１と梁３の接合部付近の立面図
【図１１】柱１と梁３の立面図
【符号の説明】
１………柱
３………梁
５、５ａ、５ｂ、５ｃ、５ｄ、５ｅ………先行降伏部材
７………方杖
９………梁３の長さ
１３………柱１の長さ
１７………取付用金物
２１、２１ａ、２１ｂ、２１ｃ、２１ｄ、２１ｅ………本体
２５、２５ａ、２５ｂ、２５ｃ、２５ｄ、２５ｅ、２７、２７ａ、２７ｂ、２７ｃ、２７ｄ、２７ｅ………取付用部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a building structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, braces and cross sticks have been used to improve the earthquake resistance of a portal-shaped structure having columns and beams. In addition, a viscoelastic damper or an oil damper may be provided on a part of the brace to dampen the structure (for example, see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP 2002-276074 A [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-320179
[Problems to be solved by the invention]
However, when bracing is installed on a wall surface, installation positions of windows and the like are limited. In addition, when a viscoelastic damper or an oil damper is used, installation and replacement work becomes complicated.
[0005]
The present invention has been made in view of such a problem, and an object of the present invention is to provide an inexpensive building that is easy to install and replace in order to improve the seismic resistance of the structure and perform vibration suppression. It is to provide structure.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a first invention in which a brace is installed near a beam-column joint of a structure, and a leading yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace. It is a building structure characterized by being provided in a section.
[0007]
In order to cause the preceding yield member to yield before the brace when a load is applied, (1) the brace is made of ordinary steel, and the preceding yield member is made of a material having a lower yield point than that of ordinary steel. The material having a lower yield point than ordinary steel is a low yield point steel or another material having a lower yield point, such as lead, aluminum, or copper.
[0008]
Alternatively, (2) by making the sectional area of the preceding yielding member smaller than the sectional area of the brace, it is possible to make the preceding yielding member yield before the brace. Further, (3) the preceding yielding member may be formed in a shape that is more easily deformed out of plane than the brace. The shape easily deformed out-of-plane includes a box-like shape, a hollow hemispherical shape, and an arch-like shape in which a space is formed between a column or a beam and a main body.
[0009]
The preceding yielding member is installed at one end or both ends of the pole or beam side of the brace. When the preceding yielding member is provided at one end of the stick, the other end of the leading yielding member and the stick is fixed to the structure. When the preceding yield members are provided at both ends of the brace, the preceding yield members are fixed to the structure. Various attachment members are used as necessary for fixing the preceding yield member and the brace. The joint between the brace or the preceding yielding member and the structure is located at 0.05A to 0.45A from the closest column-beam joint, with A as the length of one section of the beam or column on which the brace is installed. Is done.
[0010]
In the first invention, a brace is installed in the vicinity of a beam-column joint of a building, and a preceding yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace. When installing the fore member and the preceding yield member on the structure, the fore member having the preceding yield member installed on both ends or one end is installed on the beam. Alternatively, after the preceding yielding member has been installed on the column and beam, a brace may be installed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an elevation view of a column 1 and a beam 3. The columns 1 and the beams 3 are, for example, steel structures, reinforced concrete structures, and wooden structures. As shown in FIG. 1, a brace 7 is provided at a joint between the column 1 and the beam 3. The brace 7 includes a main body 8 and mounting hardware 17 (FIG. 2) provided at both ends. A leading yielding member 5 is provided at an end of the brace 7.
[0012]
When the length 9 of one section of the beam 3 is L, the distance 11 between the installation position of the advance yielding member 5 provided at the end of the beam 3 on the beam 3 side and the center of the column 1 is 0.05L to 0L. .45 L is preferable. When the length 13 of one section of the pillar 1 is H, the distance 15 between the installation position of the preceding yielding member 5 provided at the end of the brace 7 on the pillar 1 side and the center of the beam 3 is 0.05H. To 0.45H.
[0013]
2 is an elevation view near the joint between the column 1 and the beam 3, FIG. 3 is an elevation view near the junction between the advance yielding member 5 and the brace 7, and FIG. 4 is a perspective view of the advance yielding member 5. Is shown. FIG. 2 is an enlarged view of a portion shown in FIG. FIG. 3 is a diagram viewed from the direction indicated by arrow B in FIG.
[0014]
As shown in FIGS. 2 and 3, mounting hardware 17 provided at both ends of the main body 8 of the brace 7 is a member for joining the main body 8 and the preceding yielding member 5, and has a bolt hole (see FIG. 2). (Not shown). The material of the main body 8 of the brace 7 is, for example, ordinary steel. The cross section of the main body 8 has an arbitrary shape, for example, a rectangular shape, a circular shape, an H shape, or the like.
[0015]
As shown in FIGS. 3 and 4, the preceding yield member 5 includes a main body 21, a mounting member 25, a mounting member 27, and the like. The main body 21 is obtained by bending a rectangular plate-like member into an arch shape having a semicircular cross section. The material of the main body 21 of the preceding yield member 5 is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like having a low yield point.
[0016]
The mounting member 25, which is the first mounting member, is provided on the side end 33 of the arch of the main body 21 along the axial direction of the arch, that is, the direction shown by the arrow D in FIG. The attachment member 25 has a bolt hole 23. The attachment member 25 is a member for attaching the preceding yield member 5 to the column 1 or the beam 3.
[0017]
A mounting member 27 as a second mounting member is provided along a direction indicated by an arrow D in a central portion 31 which is a top of an arch of the main body 21. The attachment member 27 has a bolt hole 29. The attachment member 27 is a member for attaching the cane 7 to the preceding yield member 5.
[0018]
As shown in FIGS. 2 and 3, in order to fix the preceding yield member 5 to the beam 3 (column 1), the mounting member 25 is brought into contact with the beam 3 (column 1), and the bolt hole 23 of the mounting member 25 is fixed. , And tighten it with the nut 35. Further, in order to fix the brace 7 to the preceding yielding member 5, the mounting hardware 17 is overlapped with the mounting member 27, and the bolt holes 29 of the mounting member 27 and the bolt holes (not shown) of the mounting hardware 17 are provided. , And tighten it with the nut 19. A space 39 is formed between the main body 21 of the preceding yield member 5 and the beam 3 (column 1).
[0019]
When the staff 7 and the preceding yield member 5 are installed on the beam 3 (column 1), the staff 7 with the preceding yield member 5 fixed to both ends or one end is fixed to the beam 3 (column 1). Alternatively, after the preceding yielding member 5 is fixed to the beam 3 (post 1), the brace 7 may be fixed to the preceding yielding member 5.
[0020]
As described above, the preceding yield member 5 is formed of a low yield point steel or the like having a lower yield point than the main body 8 of the brace 7. The low yield point steel yields reliably at a low set load, and is excellent in plastic deformation and repeated deformation performance. When the load is applied to the brace 7 by using the low yield point steel as the preceding yield member 5, the main body 21 of the preceding yield member 5 moves out of the plane before the main body 8 is deformed, that is, in the direction of arrow C in FIG. Deforms in the direction shown and absorbs energy. In the out-of-plane deformation, large plastic deformation can be obtained with a small member, and large energy can be absorbed.
[0021]
As described above, in the present embodiment, the architectural structure is configured by using the brace 7 provided with the preceding yield member 5 at the end. Thereby, the structure can be damped. Also, it may be used for seismic reinforcement.
[0022]
The conventional brace-type damper blocks a window formed on a wall surface surrounded by the column 1 and the beam 3, but in the present embodiment, as described with reference to FIG. The distance 11 from the center of the column 1 is 0.05L to 0.45L, the distance 15 between the installation position of the preceding yielding member 5 and the center of the beam 3 is 0.05H to 0.45H. By installing the shorter staff 7, the degree of freedom in the position of the window is increased, and the material cost of the staff 7 is reduced.
[0023]
In the present embodiment, when the original function is lost after a large earthquake or the like, only the preceding yielding member 5 is replaced. Since the preceding yield member 5 is small and is joined to the column 1, the beam 3, and the cane 7 with bolts, replacement is easy.
[0024]
In the present embodiment, the preceding yielding member 5 is installed at both ends of the staff 7, but may be installed only at one end of the staff 7. In this case, the other end of the brace 7 is directly fixed to the column 1 or the beam 3.
[0025]
Further, the shape of the preceding yield member 5 is not limited to those shown in FIGS. Below, the example of the preceding yield member of another shape is shown. FIG. 5 shows a perspective view of the preceding yield member 5a. The preceding yield member 5a includes a main body 21a, a mounting member 25a, a mounting member 27a, and the like. The main body 21a is obtained by curving a rectangular plate-like member into a home-base arch shape in cross section. The material of the main body 21a is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0026]
The mounting member 25a, which is the first mounting member, is provided at the arch side end 33a of the main body 21a along the axial direction of the arch. The attachment member 25a has a bolt hole 23a. The mounting member 27a, which is the second mounting member, is provided along the axial direction of the arch at the central portion 31a, which is the top of the arch of the main body 21a. The attachment member 27a has a bolt hole 29a.
[0027]
FIG. 6 shows a perspective view of the preceding yield member 5b. The preceding yield member 5b includes a main body 21b, a mounting member 25b, a mounting member 27b, and the like. The main body 21b is obtained by curving a rectangular plate-like member into an arch shape having a triangular cross section. The material of the main body 21b is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0028]
The mounting member 25b, which is the first mounting member, is provided along the axial direction of the arch at the side end 33b of the arch of the main body 21b. The attachment member 25b has a bolt hole 23b. The mounting member 27b, which is the second mounting member, is provided along the axial direction of the arch at a central portion 31b that is the top of the arch of the main body 21b. The attachment member 27b has a bolt hole 29b.
[0029]
7 and 8 show perspective views of the preceding yield member 5c and the preceding yield member 5d, respectively. As shown in FIG. 7, the preceding yield member 5c includes a main body 21c, a mounting member 25c, a mounting member 27c, and the like. As shown in FIG. 8, the preceding yielding member 5d includes a main body 21d, a mounting member 25d, a mounting member 27d, and the like.
[0030]
The main body 21c and the main body 21d are obtained by curving a rectangular plate-like member into an arch shape having a rectangular cross section. The material of the main body 21c and the main body 21d is a material having a lower yield point than the main body 8 of the brace 7, for example, low yield point steel, lead, aluminum, copper, or the like. The main body 21c has a fixed member thickness as shown in FIG. 7, and the main body 21d has the thickness of the member of the main body 21c changed linearly and curvedly as shown in FIG.
[0031]
In the preceding yield member 5c, the mounting member 25c, which is the first mounting member, is provided on the arch side end 33c of the main body 21c along the axial direction of the arch. The attachment member 25c has a bolt hole 23c. The mounting member 27c, which is the second mounting member, is provided along the axial direction of the arch at the central portion 31c that is the top of the arch of the main body 21c. The attachment member 27c has a bolt hole (not shown).
[0032]
In the preceding yield member 5d, a mounting member 25d, which is a first mounting member, is provided on the side end 33d of the arch of the main body 21d along the axial direction of the arch. The attachment member 25d has a bolt hole 23d. The attachment member 27d as the second attachment member is provided along the axial direction of the arch at a central portion 31d which is the top of the arch of the main body 21d. The attachment member 27d has a bolt hole (not shown).
[0033]
FIG. 9 shows a perspective view of the preceding yield member 5e. The preceding yield member 5e includes a main body 21e, a mounting member 25e, a mounting member 27e, and the like. The main body 21e is obtained by bending a rectangular plate-like member into a hollow hemisphere. The material of the main body 21e is, for example, a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0034]
The mounting member 25e, which is the first mounting member, is provided on the hemispherical side end 33e of the main body 21e along the circumferential direction of the hemisphere. The attachment member 25e has a bolt hole 23e. The mounting member 27e, which is the second mounting member, is provided at a central portion 31e that is the top of the hemisphere of the main body 21e. The attachment member 27e has a bolt hole 29e.
[0035]
The preceding yield members 5a, 5b, 5c, 5d, 5e are fixed to the beam 3 and the column 1 via the bolt holes 23a, 23b, 23c, 23d, 23e of the mounting members 25a, 25b, 25c, 25d, 25e. You. In addition, it is fixed to the main body 8 of the stick 7 via bolt holes 29a, 29b, 29e of the mounting members 27a, 27b, 27c, 27d, 27e.
[0036]
In the case of using the preceding yield members 5a, 5b, 5c, 5d, and 5e, when a load is applied to the brace 7, the main body 21a of the preceding yield members 5a, 5b, 5c, 5d, and 5e is deformed before the brace 7 is deformed. , 21b, 21c, 21d, 21e are deformed in the out-of-plane direction to absorb energy. In the building structure using the brace 7 having the preceding yield members 5a, 5b, 5c, 5d, and 5e at the ends, the same effect as the building structure using the brace 7 having the preceding yield member 5 at the end is obtained. can get.
[0037]
The shapes of the attachment member 25 and the attachment member 27 of the preceding yield member 5, the number of the bolt holes 23 and the bolt holes 29, and the structure for fixing the brace 7 to the pillar 1 and the beam 3 are shown in FIGS. However, the present invention is not limited to the above. FIG. 10 is an elevational view of the vicinity of the joint between the column 1 and the beam 3 when the brace mounting member 43 is used. In FIG. 10, the preceding yielding member 5 is fixed to the column 1 or the beam 3 via the brace mounting member 43.
[0038]
The installation position of the brace 7 is not limited to the position shown in FIG. FIG. 11 is an elevational view of the pillar 1 and the beam 3 when the brace is installed on the floor side. In FIG. 1, the brace 7 is installed on the ceiling side of the section surrounded by the pillars 1 and the beams 3, but as shown in FIG. 11, it is installed on the floor side of the section surrounded by the columns 1 and the beams 3. Is also good. Moreover, you may install in both the ceiling side and the floor side.
[0039]
Also in this case, in order to reduce the amount of material used for the brace 7 and increase the degree of freedom in the installation position of the window, the installation position of the advance yielding member 5 provided at the end of the brace 7 on the beam 3 side is determined. The distance 11 from the center of the pillar 1 is 0.05L to 0.45L (L is the length 9 of the beam 3), and the installation position and beam of the leading yielding member 5 provided at the pillar 1 side end of the brace 7 It is preferable that the distance 15 from the center of 3 be 0.05H to 0.45H (H is the length 13 of the column 1).
[0040]
In FIGS. 1 to 10, the preceding yield member 5 is formed of a material different from that of the main body 8 of the brace 7, but the preceding yield member 5 may be made of the same material as the main body 8. When the brace 7 and the preceding yield member 5 are formed of the same material, the cross section of the end of the brace 7 may be smaller than the cross section of the main body 8 to form the preceding yield member 5.
[0041]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide an inexpensive building structure that is easy to install and replace because the seismic resistance of the structure is improved and vibration is suppressed.
[Brief description of the drawings]
FIG. 1 is an elevation view of a pillar 1 and a beam 3 FIG. 2 is an elevation view of a vicinity of a junction between a pillar 1 and a beam 3 FIG. FIG. 4 is a perspective view of a preceding yield member 5 FIG. 5 is a perspective view of a preceding yield member 5a FIG. 6 is a perspective view of a preceding yield member 5b FIG. 7 is a perspective view of a preceding yield member 5c FIG. FIG. 9 is a perspective view of a leading yielding member 5e. FIG. 10 is an elevation view near a joint between a column 1 and a beam 3. FIG. 11 is an elevation view of a column 1 and a beam 3.
1 ... pillar 3 ... beams 5, 5a, 5b, 5c, 5d, 5e ... preceding yield member 7 ... stick 9 ... length of beam 3 ... length of pillar 1 S17 Mounting hardware 21, 21a, 21b, 21c, 21d, 21e Main body 25, 25a, 25b, 25c, 25d, 25e, 27, 27a, 27b, 27c, 27d, 27e Mounting Parts

Claims

構造物の柱梁接合部近傍に方杖を設置し、荷重負荷時に前記方杖よりも先に降伏する先行降伏部材を前記方杖の端部に設けることを特徴とする建築構造。An architectural structure wherein a brace is installed in the vicinity of a beam-column joint of a structure, and a preceding yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace.

前記先行降伏部材が、前記方杖よりも降伏点が低い材料で構成されていることを特徴とする請求項１記載の建築構造。The architectural structure according to claim 1, wherein the preceding yield member is made of a material having a lower yield point than the brace.

前記先行降伏部材が、前記方杖よりも面外変形しやすい形状で構成されていることを特徴とする請求項１記載の建築構造。The architectural structure according to claim 1, wherein the preceding yield member is formed in a shape that is more easily deformed out of plane than the brace.

前記面外変形しやすい形状は、柱または梁との間に空間が形成されるような箱状、中空半球状、またはアーチ状などであることを特徴とする請求項３記載の建築構造。The building structure according to claim 3, wherein the shape that is easily deformed out of plane is a box shape, a hollow hemispherical shape, an arch shape, or the like in which a space is formed between the pillar or the beam.

前記方杖を設置する柱または梁の一区間の長さをＡとしたときに、前記先行降伏部材が、最も近い柱梁接合部から０．０５Ａ〜０．４５Ａの位置に設けられることを特徴とする請求項１から請求項４のいずれかに記載の建築構造。When the length of one section of a column or a beam on which the brace is installed is A, the preceding yielding member is provided at a position of 0.05A to 0.45A from the closest column-beam joint. The building structure according to any one of claims 1 to 4, wherein: