JP4475779B2 - Pre-assembled steel brace bonding method with frame material bonding - Google Patents

Pre-assembled steel brace bonding method with frame material bonding Download PDF

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JP4475779B2
JP4475779B2 JP2000267925A JP2000267925A JP4475779B2 JP 4475779 B2 JP4475779 B2 JP 4475779B2 JP 2000267925 A JP2000267925 A JP 2000267925A JP 2000267925 A JP2000267925 A JP 2000267925A JP 4475779 B2 JP4475779 B2 JP 4475779B2
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frame
bonding
steel
column
brace
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JP2002070329A (en
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勝義 小南
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株式会社竹中工務店
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【0001】
【発明の属する技術分野】
この発明は、既存建物の所謂「居ながら耐震補強」に採用される鉄骨ブレース接着工法の技術分野に属し、柱梁フレームの面内へ枠付き鉄骨ブレースを接着剤により先行接着して組立てる鉄骨ブレース接着工法に関する。
【0002】
【従来の技術】
従来、既存建物の所謂「居ながら耐震補強」を実現する手法として、施工時に騒音の原因となるアンカー打ちを略省略できる「接着工法」が開発され多くの実績を積み重ねている。例えば、特開平11−71906号公報に記載の「耐震補強の鉄骨ブレース増設工法」が公知に属する。
【0003】
前記の「耐震補強の鉄骨ブレース増設工法」は、枠付き鉄骨ブレースを、既存建物の柱梁フレームとの間にはめ込み作業上必要な隙間を確保した大きさに地組みし、柱梁フレームの面内へ建込んだ後に、前記柱梁フレームとその面内へ建込んだ枠付き鉄骨ブレースの周辺枠との隙間に接着剤を注入して、柱梁フレームへ枠付き鉄骨ブレースを接着する工法である。
【0004】
【発明が解決しようとする課題】
上記従来の「耐震補強の鉄骨ブレース増設工法」は、工場製作した枠付き鉄骨ブレースを現場で地組みできるように適切に分割した構造とし、現場でのジョイントを含む構成とされるから、加工工数が多い工作物となる。また、現場での組立てにそれなりの広い作業スペースを必要とするし、高力ボルトによるジョイントが接着面に突出して障害になる上に多大な手間がかかる。
【0005】
枠付き鉄骨ブレースを柱梁フレームの面内へスムーズに建込むためには、それなりに大きな隙間(具体的には、50mm〜100mm程度)を必要とし、そのため接着強度が低下する。接着剤の接着強度を発現させるためには、できるだけ上記隙間を小さく(理想的には、10mm程度)する必要がある。前記大きな隙間を埋めるために多量の接着剤を必要とするので、コストが嵩む。
【0006】
従って、本発明の目的は、鉄骨部材の加工工数が少なく、ほとんど生の単一材を使用でき、現場サイトでの地組み作業を一切必要とせず、よって限られた狭いスペースでも容易に少ない工数で施工できる、枠材接着先行組立式の鉄骨ブレース接着工法を提供することである。
【0007】
【課題を解決するための手段】
上述の課題を解決するための手段として、請求項1に記載した発明に係る枠材接着先行組立式の鉄骨ブレース接着工法は、
既存建物の柱梁フレームの耐震補強として、同柱梁フレームの面内へ枠付き鉄骨ブレースを接着し増設する鉄骨ブレース接着工法において、
前記柱梁フレームの内側面に、前記枠付き鉄骨ブレースを形成する4辺の枠材を個別に接着剤により先行接着し、同接着剤が強度を発現した後に、隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースにより接合することを特徴とする。
【0008】
請求項2に記載した発明に係る枠材接着先行組立式の鉄骨ブレース接着工法は、
既存建物の柱梁フレームの耐震補強として、同柱梁フレームの面内へ枠付き鉄骨ブレースを接着し増設する鉄骨ブレース接着工法において、
前記柱梁フレームを形成する下側の梁の上面及び左右の柱の内側面に、前記枠付き鉄骨ブレースを形成する3辺の枠材を個別に接着剤の強度の発現に好ましい大きさの隙間を開けて配置すること、
下辺と両側辺とで隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースの端部と高力ボルトで仮止めして枠材同士を仮接合すること、
前記枠材と下側の梁及び左右の柱との前記隙間に接着剤を注入し、同枠材と下側の梁及び左右の柱とを接着すること、
前記接着剤が強度を発現した後に、前記柱梁フレームの上側の梁の下面に、前記枠付き鉄骨ブレースを形成する残り一辺の枠材を接着剤の強度の発現に好ましい大きさの隙間を開けて配置し、上辺と両側辺とで隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースの端部と高力ボルトで仮止めして枠材同士を仮接合すること、
前記上辺の枠材と上側の梁との隙間に接着剤を注入して、同枠材と上側の梁とを接着し、その後全ての高力ボルトを本締めすることを特徴とする。
【0009】
請求項3記載の発明は、請求項1又は2に記載した発明に係る枠材接着先行組立式の鉄骨ブレース接着工法において、
4辺の枠材はそれぞれガゼットプレートを備えた単一材であり、相互に接合していないことを特徴とする。
【0010】
【本発明の実施形態及び実施例】
図1(A)、(B)は、請求項1記載の枠材接着先行組立式の鉄骨ブレース接着工法の実施形態を示している。この枠材接着先行組立式の鉄骨ブレース接着工法は、既存建物の柱梁フレーム1、2の耐震補強として好適に実施される。本発明の場合、既存建物の柱梁フレーム1、2の面内へ枠付き鉄骨ブレースの枠材を接着剤により先行接着して組立てる。
【0011】
図2は、第1段階として既存建物の柱梁フレーム1、2の内側面に、前記枠付き鉄骨ブレースを形成する4辺の枠材3…を個別に接着剤4により先行接着した工程を示している。
【0012】
前記4辺の枠材3…はそれぞれガゼットプレート3a、3bを備えた単一材であり、前記4辺の枠材3…を構成する上、下辺の枠材3、3は、梁1の長さよりも若干短いT形鋼から成り、両側辺の枠材3、3は、柱2の長さよりも若干短いT形鋼から成り、共に中間部位に鉄骨ブレース接合用のガゼットプレート3a、3bが設けられている。前記の各枠材3…は相互に接合されることなく、バラバラの関係で柱梁フレーム1、2の面内へ接着される(請求項3記載の発明)。
【0013】
具体的には、前記下辺の枠材3の下面に、接着剤の強度の発現に好ましい大きさの隙間を確保する隙間保持板7、7を溶接等の手段で設けて、同隙間保持板7、7を間に挟むように前記枠材3を下側の梁1の上面に配置する。そして、前記隙間に接着剤4を注入して下側の梁1と枠材3とを接着する。
【0014】
同様に、左右の柱2、2の内側面と対峙する側辺の枠材3、3の鉄骨面、及び上辺の枠材3の上面にも、隙間保持板7、7をそれぞれ設け、同隙間保持板7、7を間に挟むように前記枠材3を柱2及び上側の梁1に配置する。そして、前記隙間に接着剤4を注入して枠材3と柱2及び上側の梁1とを接着する。この時、図示は省略したが、前記枠材3が所定の位置に止まり、倒れたり滑り落ちないように、同枠材3に支持手段(仮ボルト)を設ける。
【0015】
前記接着剤4が強度を発現した後、隣接する2辺の枠材3、3のガゼットプレート3a、3b同士を、2本の溝形鋼を背中合わせに使用した鉄骨ブレース5により接合し、図1(A)に示した耐震補強を完成する。具体的には、前記鉄骨ブレース5の一方の端部を、上辺又は下辺の枠材3のガゼットプレート3aに嵌め込み、高力ボルト6で仮接合し、他方の端部を、隣接する側辺の枠材3のガゼットプレート3bと高力ボルト6で仮接合し、最終的に調整したあと本締めして前記鉄骨ブレースを完成する。図1(B)はボルト接合部の詳細を示している。
【0016】
この鉄骨ブレース接着工法は、枠材3…を柱梁フレーム1、2の面内へ個別に先行接着するので、現場サイトでの地組み作業を必要とせず、限られた狭いスペースでも容易に施工することができる。
【0017】
また、前記枠材3…にはほとんど生材を使用でき、鉄骨材料の加工が少なくて済み、少ない工数で施工することができる。
【0018】
なお、上記実施形態では、柱梁フレーム1、2に枠付き鉄骨ブレースを形成する4辺の枠材3…を先行接着し、その後隣接する枠材3、3同士を鉄骨ブレース5で接合しているが、この限りではない。具体的には、以下に示す枠材接着先行組立式の鉄骨ブレース接着工法でも実施可能である。
【0019】
図3〜図6は、請求項2記載の枠材接着先行組立式の鉄骨ブレース接着工法の実施形態を示し、請求項1記載の鉄骨ブレース接着工法と同様に、既存建物の柱梁フレーム1、2の耐震補強として好適に実施される。なお、本実施形態も4辺の枠材3…はそれぞれガゼットプレート3a、3bを備えた単一材であり、前記4辺の枠材3…を構成する上、下辺の枠材3、3は、梁1の長さよりも若干短いT形鋼から成り、両側辺の枠材3、3は、柱2の長さよりも若干短いT形鋼から成り、共に中間部位に鉄骨ブレース接合用のガゼットプレート3a、3bが設けられている。前記の各枠材3…は相互に接合されることなく、バラバラの関係で柱梁フレーム1、2の面内へ接着される(請求項3記載の発明)。
【0020】
図3は、前記枠付き鉄骨ブレースを形成する下側の梁1の上面に、枠付き鉄骨ブレースを形成する下辺の枠材3を接着剤の強度の発現に好ましい大きさの隙間を開けて配置した工程を示している。具体的には、前記下辺の枠材3の下面に、接着剤の強度の発現に好ましい大きさの隙間を確保する隙間保持板7、7を溶接等の手段で設け、同隙間保持板7、7を間に挟むように前記枠材3を下側の梁1の上面に配置する。
【0021】
図4は、左右の柱2、2の内側面に、前記枠付き鉄骨ブレースを形成する両側辺の枠材3、3を接着剤の強度の発現に好ましい大きさの隙間を開けて配置し、下辺と両側辺とで隣接する2辺の枠材3、3のガゼットプレート3a、3b同士を鉄骨ブレース5の端部と高力ボルト6で仮止めして枠材3、3同士を仮接合した工程を示している。具体的には、左右の柱2、2の内側面と対峙する側辺の枠材3、3の鉄骨面に、隙間保持板7、7をそれぞれ設け、同隙間保持板7、7を間に挟むように前記枠材3を柱2に配置する。この時、図示は省略したが、前記両側辺の枠材3、3が所定の位置に止まり、倒れたり滑り落ちないように、同枠材3、3に支持手段(仮ボルト)を設ける。
【0022】
図5は、前記枠材3と下側の梁1及び柱2との隙間に接着剤4を注入して、同枠材3と下側の梁1及び柱2とを接着し、前記接着剤4が強度を発現した後に、柱梁フレーム1、2の上側の梁1の下面に、前記枠付き鉄骨ブレースを形成する残り一辺の枠材3を接着剤4の強度の発現に好ましい大きさの隙間を開けて配置した工程を示している。具体的には、上辺の枠材3の上面に、隙間保持板7、7を設け、同隙間保持板7、7を間に挟むように前記枠材3を上側の梁1の下面に配置する。なお、図示は省略したが、前記上辺の枠材3にも支持手段(仮ボルト)を設け、前記枠材3が落ちないように支持されている。
【0023】
図6は、上辺と両側辺とで隣接する2辺の枠材3、3のガゼットプレート3a、3b同士を鉄骨ブレース5の端部と高力ボルト6で仮止めして枠材3、3同士を仮接合した工程を示している。具体的には、前記上辺の枠材3のガゼットプレート3aに鉄骨ブレース5の一端部を高力ボルト6で仮止めし、他端部を先に配置した側辺の枠材3のガゼットプレート3bに高力ボルト6で仮止めして隣接する上辺の枠材3と側辺の枠材3とを仮接合する。
【0024】
その後、前記上辺の枠材3と梁1との隙間に接着剤4を注入して、同枠材3と梁1とを接着し、仮止めしていた全ての高力ボルト6…を最終的に調整したあと本締めし、耐震補強を完成する。
【0025】
従って、請求項2記載の枠材接着先行組立式の鉄骨ブレース接着工法は、請求項1記載の鉄骨ブレース接着工法と同様に、枠材3…を柱梁フレーム1、2の面内へ個別に先行接着するので、現場サイトでの地組み作業を必要とせず、限られた狭いスペースでも容易に施工することができる。
【0026】
また、前記枠材3…にはほとんど生材を使用でき、鉄骨材料の加工が少なくて済み、少ない工数で施工することができる。
【0027】
なお、上記実施形態では、上述した施工手順により枠付き鉄骨ブレースを柱梁フレーム1、2の面内へ施工しているが、この限りではない。要するに、枠付き鉄骨ブレースを形成する枠材3…を接合することなく、バラバラの関係で接着剤4により柱梁フレーム1、2の面内へ接着すれば良く、施工手順は限定されない。従って、最終的に図1(A)に示した状態に鉄骨ブレースが完成すれば良い。
【0028】
【本発明が奏する効果】
請求項1〜3記載の枠材接着先行組立式の鉄骨ブレース接着工法は、枠材を柱梁フレームの面内へ個別に先行接着するので、現場サイトでの地組み作業を必要とせず、限られた狭いスペースでも容易に施工することができる。
【0029】
また、前記枠材にはほとんど生材を使用でき、鉄骨材料の加工が少なくて済み、少ない工数で施工することができる。
【図面の簡単な説明】
【図1】Aは、請求項1〜3記載の枠材接着先行組立式の鉄骨ブレース接着工法の実施形態を示した立面図である。Bは、A図のX部を拡大して示した断面図である。
【図2】請求項1及び3記載の枠材接着先行組立式の鉄骨ブレース接着工法の施工途中の工程を示した立面図である。
【図3】請求項2及び3記載の枠材接着先行組立式の鉄骨ブレース接着工法の施工途中の工程を示した立面図である。
【図4】請求項2及び3記載の枠材接着先行組立式の鉄骨ブレース接着工法の施工途中の工程を示した立面図である。
【図5】請求項2及び3記載の枠材接着先行組立式の鉄骨ブレース接着工法の施工途中の工程を示した立面図である。
【図6】請求項2及び3記載の枠材接着先行組立式の鉄骨ブレース接着工法の施工途中の工程を示した立面図である。
【符号の説明】
1 既存建物の梁
2 既存建物の柱
3 枠材
3a、3b ガゼットプレート
4 接着剤
5 鉄骨ブレース
6 高力ボルト
7 隙間保持板
[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of the steel brace bonding method used for so-called "earthquake-proof reinforcement" of existing buildings, and is constructed by pre-bonding a steel brace with a frame in the plane of a column beam frame with an adhesive. It relates to the bonding method.
[0002]
[Prior art]
Conventionally, as a technique for realizing so-called “seismic reinforcement while staying” in an existing building, an “adhesion method” capable of substantially omitting anchoring that causes noise at the time of construction has been developed and accumulated many achievements. For example, “Seismic reinforcement steel brace expansion method” described in Japanese Patent Application Laid-Open No. 11-71906 is well known.
[0003]
The above-mentioned “Seismic Reinforcement Steel Brace Expansion Method” is a method of installing a framed steel brace between the existing building and the column beam frame so as to secure the necessary clearance for the work. After being built in, an adhesive is injected into the gap between the column beam frame and the peripheral frame of the framed steel brace built in the plane, and the framed steel brace is bonded to the column beam frame. is there.
[0004]
[Problems to be solved by the invention]
The above-mentioned conventional method of expanding steel braces for seismic reinforcement has a structure in which the steel braces with frames manufactured at the factory are properly divided so that they can be assembled on-site, and includes on-site joints. There will be a lot of work. In addition, a large work space is required for assembling on site, and a joint using a high-strength bolt protrudes from the bonding surface and becomes an obstacle, which takes a lot of trouble.
[0005]
In order to smoothly build the framed steel brace in the plane of the column beam frame, a large gap (specifically, about 50 mm to 100 mm) is required as it is, and thus the adhesive strength is lowered. In order to develop the adhesive strength of the adhesive, it is necessary to make the gap as small as possible (ideally about 10 mm). Since a large amount of adhesive is required to fill the large gap, the cost increases.
[0006]
Therefore, the object of the present invention is to reduce the number of man-hours for processing steel members, use almost raw single materials, and do not require any grounding work at the site site, and therefore easily man-hours even in a limited narrow space. It is to provide a steel frame brace bonding method of the frame material bonding pre-assembly type that can be constructed in
[0007]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the frame material bonding prior assembly type steel brace bonding method according to the invention described in claim 1 is:
As a seismic reinforcement of the column beam frame of an existing building, in the steel brace bonding method to add a steel frame brace with a frame to the surface of the column beam frame,
Four side frames that form the framed steel brace are individually bonded to the inner side surface of the column beam frame with an adhesive, and after the adhesive develops strength, The gusset plates are joined to each other by a steel brace.
[0008]
The frame material bonding prior assembly type steel brace bonding method according to the invention described in claim 2 is:
As a seismic reinforcement of the column beam frame of an existing building, in the steel brace bonding method to add a steel frame brace with a frame to the surface of the column beam frame,
Three-sided frame material forming the steel brace with the frame is individually provided on the upper surface of the lower beam forming the column beam frame and the inner side surfaces of the left and right columns, and a gap having a size preferable for expressing the strength of the adhesive. Open and place,
Temporarily joining the gusset plates of the frame material on the two sides adjacent to each other on the lower side and both sides with the end of the steel brace and the high-strength bolt,
Injecting an adhesive into the gap between the frame member and the lower beam and the left and right columns, and bonding the frame member and the lower beam and the left and right columns;
After the adhesive exhibits strength, the remaining frame material forming the steel brace with the frame is formed on the lower surface of the upper beam of the column beam frame with a gap having a size preferable for the strength of the adhesive. And temporarily joining the gusset plates of the frame material on the two sides adjacent to each other on the upper side and both sides with the end of the steel brace and the high strength bolt, and temporarily joining the frame materials to each other,
An adhesive is injected into a gap between the frame member on the upper side and the upper beam to bond the frame member and the upper beam, and then all high-strength bolts are finally tightened.
[0009]
The invention described in claim 3 is a steel brace bonding method of the frame material bonding preceding assembly type according to the invention described in claim 1 or 2,
Each of the four side frame members is a single material provided with a gusset plate, and is not joined to each other.
[0010]
[Embodiments and Examples of the Invention]
1 (A) and 1 (B) show an embodiment of a steel material brace bonding method of the frame material bonding prior assembly type according to claim 1. This frame material bonding prior assembly type steel brace bonding method is suitably implemented as seismic reinforcement for the column beam frames 1 and 2 of the existing building. In the case of the present invention, a frame material of a steel brace with a frame is assembled in advance in the plane of the column beams 1 and 2 of the existing building with an adhesive.
[0011]
FIG. 2 shows a process in which the four-side frame members 3 for forming the steel braces with the frame are individually adhered to each other by the adhesive 4 on the inner side surfaces of the column beam frames 1 and 2 of the existing building as a first stage. ing.
[0012]
The four-side frame members 3 are each a single material provided with gusset plates 3a and 3b. The four-side frame members 3 and 3 constitute the four-side frame members 3. The frame members 3 and 3 on both sides are made of a T-shape steel slightly shorter than the length of the column 2 and both are provided with gusset plates 3a and 3b for joining steel braces at the intermediate portion. It has been. Each said frame material 3 ... is adhere | attached in the surface of the column beam frames 1 and 2 by the relationship of disjoint, without mutually joining (invention of Claim 3).
[0013]
Specifically, gap holding plates 7 and 7 that secure a gap having a size preferable for the expression of the strength of the adhesive are provided on the lower surface of the lower frame member 3 by means of welding or the like. , 7 is disposed on the upper surface of the lower beam 1 so as to sandwich the frame 7 therebetween. Then, the adhesive 4 is injected into the gap to bond the lower beam 1 and the frame material 3 together.
[0014]
Similarly, gap holding plates 7 and 7 are respectively provided on the steel frame surfaces of the side frame members 3 and 3 facing the inner side surfaces of the left and right columns 2 and 2 and the upper surface of the upper frame member 3. The frame member 3 is arranged on the column 2 and the upper beam 1 so as to sandwich the holding plates 7 and 7 therebetween. Then, an adhesive 4 is injected into the gap to bond the frame member 3 to the column 2 and the upper beam 1. At this time, although not shown in the figure, support means (temporary bolts) are provided on the frame material 3 so that the frame material 3 stops at a predetermined position and does not fall down or slide down.
[0015]
After the adhesive 4 develops strength, the adjacent gusset plates 3a and 3b of the frame materials 3 and 3 on the two sides are joined together by a steel brace 5 using two channel steels back to back. Complete the seismic reinforcement shown in (A). Specifically, one end of the steel brace 5 is fitted into the gusset plate 3a of the frame member 3 on the upper side or the lower side, temporarily joined with the high strength bolt 6, and the other end is connected to the adjacent side. The steel frame brace is completed by temporarily joining the gusset plate 3b of the frame material 3 with the high-strength bolts 6 and finally adjusting the gusset plate 3b. FIG. 1B shows details of the bolt joint.
[0016]
This steel brace bonding method pre-bonds the frame members 3 ... individually to the surfaces of the column beam frames 1 and 2, so it does not require grounding work at the site and can be easily constructed in a limited space. can do.
[0017]
Moreover, almost all raw materials can be used for the frame members 3..., Less processing of the steel frame material is required, and construction can be performed with less man-hours.
[0018]
In the above embodiment, the four-side frame members 3... That form the steel braces with frames are pre-adhered to the columnar frames 1 and 2, and the adjacent frame members 3 and 3 are then joined together by the steel braces 5. This is not the case. Specifically, the present invention can also be implemented by the frame material bonding prior assembly type steel brace bonding method shown below.
[0019]
3 to 6 show an embodiment of the frame material bonding prior assembly type steel brace bonding method according to claim 2, and in the same manner as the steel brace bonding method according to claim 1, the column beam frame 1 of an existing building, It is suitably implemented as the seismic reinforcement of No. 2. In this embodiment, the four side frame members 3 are each a single material provided with gusset plates 3a and 3b, and the lower side frame members 3 and 3 constitute the four side frame members 3 and so on. The frame members 3 and 3 on both sides are made of T-shaped steel slightly shorter than the length of the column 2 and are both gusset plates for joining steel braces at the intermediate portion. 3a and 3b are provided. Each said frame material 3 ... is adhere | attached in the surface of the column beam frames 1 and 2 by the relationship of disjoint, without mutually joining (invention of Claim 3).
[0020]
FIG. 3 shows that the lower frame material 3 forming the framed steel brace is disposed on the upper surface of the lower beam 1 forming the framed steel brace with a gap having a size preferable for the development of the strength of the adhesive. Shows the process. Specifically, gap holding plates 7 and 7 for securing a gap having a size preferable for the expression of the strength of the adhesive are provided on the lower surface of the lower frame member 3 by means of welding or the like. The frame member 3 is arranged on the upper surface of the lower beam 1 so that 7 is sandwiched therebetween.
[0021]
FIG. 4 shows, on the inner surfaces of the left and right pillars 2 and 2, the frame members 3 and 3 on both sides forming the framed steel brace are arranged with a gap having a size preferable for the expression of the strength of the adhesive, The frame members 3 and 3 are temporarily joined by temporarily fixing the gusset plates 3a and 3b of the two frame members 3 and 3 adjacent to each other on the lower side and the both sides with the ends of the steel brace 5 and the high-strength bolts 6. The process is shown. Specifically, gap holding plates 7 and 7 are respectively provided on the steel frame surfaces of the side frame members 3 and 3 facing the inner surfaces of the left and right columns 2 and 2, and the gap holding plates 7 and 7 are interposed therebetween. The said frame material 3 is arrange | positioned to the pillar 2 so that it may pinch | interpose. At this time, although not shown in the figure, support means (temporary bolts) are provided on the frame members 3 and 3 so that the frame members 3 and 3 on both sides stop at a predetermined position and do not fall down or slide down.
[0022]
FIG. 5 shows that the adhesive 4 is injected into the gap between the frame member 3 and the lower beam 1 and the column 2 to bond the frame member 3 to the lower beam 1 and the column 2. After 4 develops strength, the frame material 3 on the remaining side forming the steel brace with the frame is formed on the lower surface of the beam 1 on the upper side of the column beams 1 and 2 with a size preferable for the strength development of the adhesive 4. It shows a process in which a gap is provided. Specifically, gap holding plates 7 and 7 are provided on the upper surface of the frame member 3 on the upper side, and the frame member 3 is arranged on the lower surface of the upper beam 1 so as to sandwich the gap holding plates 7 and 7 therebetween. . Although not shown, support means (temporary bolts) are also provided on the frame member 3 on the upper side so that the frame member 3 is supported so as not to fall.
[0023]
FIG. 6 shows that the frame members 3, 3 are fixed by temporarily fixing the gusset plates 3 a, 3 b of the two frame members 3, 3 adjacent to each other on the upper side and both sides with the end of the steel brace 5 and the high strength bolt 6. The process which carried out temporary joining is shown. Specifically, one end of the steel brace 5 is temporarily fixed to the gusset plate 3a of the frame member 3 on the upper side with a high-strength bolt 6, and the gusset plate 3b of the side frame member 3 having the other end disposed first. The upper frame material 3 and the side frame material 3 adjacent to each other are temporarily joined with the high-strength bolts 6 and temporarily joined.
[0024]
Thereafter, an adhesive 4 is injected into the gap between the frame member 3 on the upper side and the beam 1 to bond the frame member 3 and the beam 1 and finally fix all the high-strength bolts 6 temporarily fixed. After adjusting to the final tightening, complete the seismic reinforcement.
[0025]
Therefore, the frame material bonding prior assembly type steel brace bonding method described in claim 2 is the same as the steel brace bonding method described in claim 1 in that the frame members 3. Since it is bonded in advance, it does not require groundwork at the site, and can be easily constructed even in a limited space.
[0026]
Moreover, almost all raw materials can be used for the frame members 3..., Less processing of the steel frame material is required, and construction can be performed with less man-hours.
[0027]
In the above embodiment, the framed steel braces are constructed in the planes of the column beam frames 1 and 2 by the construction procedure described above, but this is not restrictive. In short, without joining the frame members 3 forming the framed steel brace, it is sufficient to bond them in the plane of the column beam frames 1 and 2 with the adhesive 4 in a disjoint relationship, and the construction procedure is not limited. Accordingly, the steel brace may be finally completed in the state shown in FIG.
[0028]
[Effects of the present invention]
In the frame material bonding prior assembly type steel brace bonding method according to claims 1 to 3, the frame material is individually bonded in advance to the surface of the column beam frame. It can be easily installed even in a narrow space.
[0029]
Moreover, almost all raw materials can be used for the frame material, and the processing of the steel material can be reduced.
[Brief description of the drawings]
FIG. 1A is an elevational view showing an embodiment of a steel material brace bonding method of a frame material bonding prior assembly type according to claims 1 to 3; B is an enlarged cross-sectional view of a portion X in FIG.
FIG. 2 is an elevational view showing a process in the middle of the construction of the frame material bonding prior assembly type steel brace bonding method according to claims 1 and 3;
FIG. 3 is an elevational view showing a process in the middle of construction of the frame material bonding pre-assembly type steel brace bonding method according to claims 2 and 3;
FIG. 4 is an elevational view showing a process in the middle of construction of the frame material bonding prior assembly type steel brace bonding method according to claims 2 and 3;
FIG. 5 is an elevational view showing a process in the middle of construction of the frame material bonding prior assembly type steel brace bonding method according to claims 2 and 3;
FIG. 6 is an elevational view showing a process in the middle of construction of the frame material bonding prior assembly type steel brace bonding method according to claims 2 and 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Beam of existing building 2 Column 3 of existing building Frame material 3a, 3b Gazette plate 4 Adhesive 5 Steel brace 6 High strength bolt 7 Gap holding plate

Claims (3)

  1. 既存建物の柱梁フレームの耐震補強として、同柱梁フレームの面内へ枠付き鉄骨ブレースを接着し増設する鉄骨ブレース接着工法において、
    前記柱梁フレームの内側面に、前記枠付き鉄骨ブレースを形成する4辺の枠材を個別に接着剤により先行接着し、同接着剤が強度を発現した後に、隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースにより接合することを特徴とする、枠材接着先行組立式の鉄骨ブレース接着工法。
    As a seismic reinforcement of the column beam frame of an existing building, in the steel brace bonding method to add a steel frame brace with a frame to the surface of the column beam frame,
    Four side frames that form the framed steel brace are individually bonded to the inner side surface of the column beam frame with an adhesive, and after the adhesive develops strength, The steel brace bonding method of the frame material bonding pre-assembly type, characterized in that the gusset plates are bonded to each other by steel braces.
  2. 既存建物の柱梁フレームの耐震補強として、同柱梁フレームの面内へ枠付き鉄骨ブレースを接着し増設する鉄骨ブレース接着工法において、
    前記柱梁フレームを形成する下側の梁の上面及び左右の柱の内側面に、前記枠付き鉄骨ブレースを形成する3辺の枠材を個別に接着剤の強度の発現に好ましい大きさの隙間を開けて配置すること、
    下辺と両側辺とで隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースの端部と高力ボルトで仮止めして枠材同士を仮接合すること、
    前記枠材と下側の梁及び左右の柱との前記隙間に接着剤を注入し、同枠材と下側の梁及び左右の柱とを接着すること、
    前記接着剤が強度を発現した後に、前記柱梁フレームの上側の梁の下面に、前記枠付き鉄骨ブレースを形成する残り一辺の枠材を接着剤の強度の発現に好ましい大きさの隙間を開けて配置し、上辺と両側辺とで隣接する2辺の枠材のガゼットプレート同士を鉄骨ブレースの端部と高力ボルトで仮止めして枠材同士を仮接合すること、
    前記上辺の枠材と上側の梁との隙間に接着剤を注入して、同枠材と上側の梁とを接着し、その後全ての高力ボルトを本締めすることを特徴とする、枠材接着先行組立式の鉄骨ブレース接着工法。
    As a seismic reinforcement of the column beam frame of the existing building, in the steel brace bonding method to add a steel frame brace with a frame in the plane of the column beam frame,
    Three-sided frame material forming the steel brace with the frame is individually formed on the upper surface of the lower beam forming the column beam frame and the inner side surfaces of the left and right columns, and a gap having a size preferable for expressing the strength of the adhesive. Open and place,
    Temporarily joining the gusset plates of the frame material on the two sides adjacent to each other on the lower side and the both sides with the end of the steel brace and the high-strength bolt,
    Injecting an adhesive into the gap between the frame member and the lower beam and the left and right columns, and bonding the frame member and the lower beam and the left and right columns;
    After the adhesive develops strength, the remaining frame material forming the steel brace with the frame is formed on the lower surface of the upper beam of the column beam frame with a gap having a size preferable for the strength of the adhesive. And temporarily joining the gusset plates of the frame material on the two sides adjacent to each other on the upper side and both sides with the end of the steel brace and the high strength bolt, and temporarily joining the frame materials,
    A frame material characterized by injecting an adhesive into a gap between the frame material on the upper side and the upper beam to bond the frame material and the upper beam, and then tightening all high-strength bolts. Pre-bonding steel brace bonding method.
  3. 4辺の枠材はそれぞれガゼットプレートを備えた単一材であり、相互に接合していないことを特徴とする、請求項1又は2に記載した枠材接着先行組立式の鉄骨ブレース接着工法。The frame material bonding pre-assembly type steel brace bonding method according to claim 1 or 2, wherein the four frame materials are each a single material provided with a gusset plate and are not joined to each other.
JP2000267925A 2000-09-05 2000-09-05 Pre-assembled steel brace bonding method with frame material bonding Expired - Fee Related JP4475779B2 (en)

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