JP3981948B2

JP3981948B2 - Support structure of existing outer wall structure

Info

Publication number: JP3981948B2
Application number: JP2002332189A
Authority: JP
Inventors: 英温丑場; 康司佐守; 恒幸酒井
Original assignee: Shimizu Corp
Current assignee: Shimizu Corp
Priority date: 2002-11-15
Filing date: 2002-11-15
Publication date: 2007-09-26
Anticipated expiration: 2022-11-15
Also published as: JP2004162474A

Description

【０００１】
【発明の属する技術分野】
本発明は、既存構造物を構成する既存外壁構造体の一部を保存して自立させるとともに、既存構造物の解体跡地に新設構造物を構築し、該新設構造物に前記既存外壁構造体を支持する既存外壁の支持構造に関する。
【０００２】
【従来の技術】
近年、近代的な名建築物は、老朽化の進行や耐震性の問題等を理由に取り壊しを余儀なくされる場合が多い。しかし、これらの建築物は、歴史的に価値が高いことから、建築物自身もしくは建築物を構成する構造部材の一部を保存しようとするニーズが高まりつつある。
このような中、特許文献１に示すように、既存建築物の外壁面を保存するに際し、外壁面を鉄筋コンクリート版と一体化した上で任意の大きさに切りだし、これを外装版として新たな構造物に用いる方法が開示されている。
【０００３】
【特許文献１】
特開昭５４−７７４２４号公報（第４図参照）
【０００４】
一方で、既存建築物の外壁面を、既存外柱を含めた既存外壁構造体として自立させた上で、新設構造物に用いる場合には、既存外壁構造体の裏面側に、独立して立設する補強フレームを構築し、該補強フレームと前記壁面とを一体化させた上で、該補強フレームと新設構造物をエキスパンション・ジョイント等を用いて連結する構成が一般に用いられている。
【０００５】
【発明が解決しようとする課題】
しかし、上述する構成では、前記補強フレームと既存外壁構造体とを一体化することにより剛性が向上し、基礎構造との取り合い部となる脚部に大きな曲げモーメントが生じやすく、ひび割れ等が発生しやすい。また、既存外壁構造体を自立させるためには、補強フレームが大規模構造となり易く、新設構造物と既存外壁構造体との間に利用できないスペースが生じる場合が多い。
【０００６】
上記事情に鑑み、本発明は、簡略な構成で安全性が高く安価な、既存外壁構造体を該新設構造物に連結して保存するための、既存外壁の支持構造を提供することを目的としている。
【０００７】
【課題を解決するための手段】
請求項１記載の既存外壁構造体の支持構造は、既存構造物の解体に際し、該既存構造物を構成する既存外壁構造体の一部を保存して自立させるとともに、既存構造物の解体跡地に新設構造物を構築し、該新設構造物に前記既存外壁構造体を支持する既存外壁の支持構造であって、保存したい既存外壁構造体は、その裏面側に所定の離間間隔をもって平行に配される補強フレームに支持されており、該補強フレームが、前記既存外壁と同様の大きさの鉛直面を有する補強フレーム本体と、該補強フレーム本体の一方の鉛直面に、高さ方向に所定の間隔をもって複数設けられ、前記既存外壁構造体に向けて水平に突出する支持部材とを備えてなり、該支持部材の端部が、前記既存外壁構造体の裏面に固定手段を介して固定されることを特徴としている。
【０００８】
請求項２記載の既存外壁構造体の支持構造は、前記既存外壁構造体を支持する補強フレームには、前記補強フレーム本体の他方の鉛直面における頂部近傍で前記新設構造物の所定の階層の床面と同一の高さ位置に、丸棒状の軸部材と、該軸部材に貫通されて該軸部材に対してその軸線方向に相対水平移動自在かつ該軸部材の周方向に相対回転自在な回転部材とを有してなるピンローラー支承付き連結部材の一方の端部が、前記軸部材の軸線方向が水平かつ前記補強フレーム本体と平行となるように配置されて固定部材を介して取り付けられているとともに、前記新設構造物には、所定の階層に前記補強フレームに向けて張出し床が水平に設けられていて、該張り出し床の端部に、前記ピンローラー支承付き連結部材の他方の端部がブラケットを介して取り付けられることにより、前記既存外壁構造体を支持する前記補強フレームがその頂部近傍に取り付けられた前記ピンローラー支承付き連結部材を介して前記新設構造物に連結されることによって、該補強フレームが前記軸部材の軸線方向への相対水平移動と該軸部材の周方向への相対回転が自在な状態で前記新設構造物により支持されていることを特徴としている。
【０００９】
【発明の実施の形態】
本発明の既存外壁構造体の支持構造は、保存したい既存外壁構造体が自立できるよう、既存外壁構造体の裏面側に近接して補強フレームを構築して支持部材を介して支持するとともに、該補強フレームの頂部近傍と前記新設構造物から補強フレームに向けて設けられた張出し床とを、水平移動及び回転の自在なピンローラー支承を備えたピンローラー支承付き連結部材を介して支持することにより、前記補強フレームに支持された既存外壁構造体の構造的な安全性を確保するものである。
【００１０】
図１に示すように、既存構造物を構成する構造体の中で、保存の対象となった既存外壁構造体１は、既存外壁本体１ａと該既存外壁本体１ａの両側部各々に立設する対をなす既存柱１ｂにより構成されている。これら既存外壁構造体１は、補強された既存基礎部３に支持されるとともに、裏面側に設けられて、補強された既存基礎部３と一体的に構築される補強フレーム２とにより支持されている。
なお、本実施の形態では、既存外壁構造体１の補強フレーム２を挟んだ裏面側に新設構造物４が構築されて、該新設構造物４の外壁として既存外壁構造体１を再利用しており、既存外壁構造体１を支持する補強フレーム２が新設構造物４に支持される構成を示している。したがって、補強された既存基礎部３は、新設構造物４の新設基礎部５と一体化されており、これにより既存外壁構造体１及び補強フレーム２を支持する既存基礎部３は、新設構造物４の新設基礎部５に支持されることなり、構造物全体が安定し不同沈下を生じることのない構成を有している。
【００１１】
前記既存外壁構造体１の裏面側に設けられた補強フレーム２は、補強フレーム本体２ａと、支持部材２ｂとを備えている。該補強フレーム本体２ａは、鉄骨造よりなり、前記既存外壁構造体１の鉛直面とほぼ同様の大きさを有する枠組み状に形成されている。本実施の形態では、図２に示すように、補強フレーム本体２ａの開口部には、前記既存外壁構造体１に内包された梁１ｃが配されている位置と同様の高さ位置に水平部材２ｃが架け渡されているが、必ずしもこれにこだわるものではなく、独立して立設でき、面内方向に力が作用した際に、この力を負担できるラーメン構造としての性能を有する構成であれば、何れの形状を用いてもよい。
【００１２】
該補強フレーム本体２ａには、一方の鉛直面に所定の離間間隔を持って複数の支持部材２ｂが固着手段を介して固着されている。該支持部材２ｂは、剛性の高い部材よりなり、前記補強フレーム本体２ａの一方の面から突出するように設けられて、突端部を前記既存外壁構造体１の裏面に固定手段を介して固定することにより、前記既存外壁構造体１を補強フレーム２に支持させるものである。本実施の形態では支持部材２ｂに、補強フレーム本体２ａの長さと同程度もしくは略短いスラブ材を用いており、これを前記水平部材２ｃと同様の高さ位置に各々配置し、前記既存外壁構造体１を、内包された梁１ｃ位置で支持する構成としている。これにより、該支持部材２ｂは、より安全に既存外壁構造体１を支持することができるものである。
このように本実施の形態では、補強フレーム２が既存外壁構造体１を線で支持する構成としたが、必ずしもこれにこだわるものではなく、支持部材２ｂに突起形状の部材を用いて、これらを補強フレーム本体２ａの両側端部近傍に対して高さ方向に所定の離間間隔を持って複数配置することにより、既存外壁構造体１を点で支持する等、既存外壁構造体１を補強フレーム２で支持できる部材であれば、何れを用いてもよい。
【００１３】
上述する構成の補強フレーム２は、前記既存外壁構造体１を支持するに際し、裏面側に一体的に取り付けられるのではなく、補強フレーム２に備えられた支持部材２ｂを介して線的もしくは点的に支持することから、補強フレーム２に支持されることにより前記既存外壁構造体１の剛性が高まり過ぎることがないため、面外方向の力が作用し、面外の曲げ変形が生じた際にも、既存外壁構造体１の下部で補強した既存基礎部３との取り合い部近傍に、大きな曲げモーメントが生じることはなく、該既存外壁構造体１の損傷を抑制することができるものである。
【００１４】
次に、上述する補強フレーム２に支持された既存外壁構造体１を新設構造物４の外壁として利用する場合の既存外壁の支持構造を以下に示す。
【００１５】
図１に示すように、既存外壁構造体１の補強フレーム２を挟んだ裏面側に構築される新設構造物４は、前記補強フレーム２の他方の面に向かい合う側面より、各階高毎に張出し床６が構築されている。該張り出し床６は、その張り出し長さを、前記既存外壁構造体１よりも上方に位置するものについては、その制限を与えないものの、前記既存外壁構造体１が存在する高さ位置に配されるものについては、前記補強フレーム２に支持された既存外壁構造体１が面外方向の力を受けて変形を生じた際にも、干渉することのないクリアランスＬを確保する長さに形成されている。
【００１６】
一方で、該新設構造物４と向かい合う前記補強フレーム本体２ａの他方の面には、前記ピンローラー支承付き連結部材７が突出して設けられている。
図２に示すように、該ピンローラー支承付き連結部材７は、丸棒状の軸部材８と、該軸部材８に貫通され軸部材８の長さ方向（軸線方向）に自在にスライドするとともに、周方向にも自在に回転する回転部材９と、該回転部材９に備えられるブラケット１３と、前記軸部材８に平行に配され、軸部材８の両端部に固着された連結部材１０を介して連結される固定部材１１とにより構成されている。
すなわち、このような構成のピンローラー支承付き連結部材７は、軸部材８に連結された固定部材１１と、回転部材９に備えられたブラケット１３とが、軸部材８の軸線方向への相対水平移動およびその軸部材８の周方向への相対回転とが自在に構成されたものである。
【００１７】
なお、本実施の形態では、図３に示すように、２本の前記軸部材８を同一直線を形成する位置に離間して配置し、前記固定部材１１の側面に連結部材１０を介して連結する構成を示した。これに伴い、前記回転部材９も２本の前記軸部材８各々に設けられており、軸部材８を貫通する開口面を向かい合わせて２個配置されている。これら回転部材９は、軸部材８に平行に配置される棒状のつなぎ部材１２により連結されて、該つなぎ部材１２に前記ブラケット１３が所定の数量取り付けられる構成となっている。しかし、ピンローラー支承付き連結部材７は、必ずしもこれにこだわるものではなく、前記軸部材８と、該軸部材８に固定される固定部材１１と、軸部材８に対してその周方向に相対回転自在及び軸線方向に相対水平移動自在な回転部材９と、該回転部材９にブラケット１３を備える構成を有しており、ブラケット１３が固定部材１１に対して上記の相対回転及び水平相対移動を自在にする構成を有していれば、何れの形状を用いてもよい。
【００１８】
このようなピンローラー支承付き連結部材７は、図２〜図４に示すように、前記軸部材８が補強フレーム本体２ａの他方の面側に水平に突出するように、かつ該軸部材８の軸線方向が水平かつ補強フレーム本体２ａと平行になる状態に配置されて、その一方の端部である前記固定部材１１が補強フレーム本体２ａに締結手段を介して締結されている。このとき、前記補強フレーム２に対するピンローラー支承付き連結部材７の高さ位置は、頂部近傍で、かつ隣接して設けられている新設構造物４の張出し床６ａと同様の高さ位置に設置されている。なお、固定部材１１の下部には頬杖部材１４が設けられており、該頬杖部材１４を補強フレーム本体２ａに固定手段を介して固定することにより、固定部材１１の水平性は維持されている。
【００１９】
一方で、図１に示すように、該ピンローラー支承付き連結部材７と同様の高さ位置に設けられている新設構造物４の張出し床６ａは、その張り出し長さが、他よりも短く形成されており、前記固定部材１１とブラケット１３を水平に配置した際の、ピンローラー支承付き連結部材７の長さと張り出し床６ａの長さを合わせたものが、前記補強フレーム２と新設構造物４との離間距離となるように、長さが調整されている。
また、図４に示すように、ピンローラー支承付き連結部材７と同様の高さ位置に設けられている張り出し床６ａには、端部上面に前記ブラケット１３の端部と嵌合する切り欠きが設けられており、該切り欠き部にブラケット１３を嵌合させた上で、両者を締結手段を介して締結している。これにより、前記補強フレーム２に支持された既存外壁構造体１は、前記ピンローラー支承付き連結部材７を介して新設構造物４に連結されることとなる。
【００２０】
このように、補強フレーム２に支持された既存外壁構造体１を、補強フレーム２の頂部近傍にのみ設けられたピンローラー支承付き連結部材７を介して新設構造物４に支持する構成は、既存外壁構造体１が補強フレーム２に支持されることにより剛性の高い構造となっており、一方、前記新設構造物４が、耐震性能をあらかじめ考慮されて既存外壁構造体１と比較しても剛性の低い構造に構築されていることから、両者の剛性が異なることにより生じる挙動の違いを吸収することを目的とするものである。
【００２１】
例えば、図５に示すように、地震等が発生し既存外壁構造体１の面外方向（新設構造物４に対して離接する方向）の力が作用すると、新設構造物４は、層間変形を生じるような挙動を示すこととなるが、剛性の高い既存外壁構造体１の頂部とピンローラー支承付き連結部材７を介して連結されていることから、該既存外壁構造体１の面外方向の曲げ剛性により、新設構造物４に作用する面外方向の力を吸収し、新設構造物４の層間変形を抑制するものである。これらの挙動を図６に模式的に示す。
図６（ａ）は、前記新設構造物４に、既存外壁構造体１の裏面向き面外方向の力が作用している状況である。このような場合には、新設構造物４から既存外壁構造体１に裏面向き面外方向の力が作用され、既存外壁構造体１の下部近傍に曲げモーメントを生じることとなるが、前記既存外壁構造体１はこれを支持する補強フレーム２に対しては上述したように線的あるいは点的に支持されるのみであって全面的には一体化されていないことからその剛性は低いため、発生する曲げモーメントは小さく、ひび割れ等の損傷を生じることはない。
また、図６（ｂ）は、前記新設構造物４に、既存外壁構造体１の表面向き面外方向の力が作用している状況である。ここでは、前記ピンローラー支承付き連結部材７の軸部材８を中心に、回転部材９を介してブラケット１３が回転することにより、新設構造物４が自身の耐力のみ面外方向の力に対向することとなるため、既存外壁構造体１に過大な面外方向の力を伝達しない構成となっている。
【００２２】
なお、ブラケット１３が回転するような挙動が生じた際には、前記固定部材１１にも、鉛直方向に変位を与えるような力が生じている。本実施の形態では、図３に示すように、補強フレーム本体２ａの裏面側に水平なトラス部材１５を設けてそのトラス部材１５を介して固定部材１１に補強フレーム本体２ａに固定して、該トラス部材１５の面外方向（鉛直方向）の剛性を適宜調整しておき、先に述べた固定部材１１に対して鉛直方向に変位を与えるような力が生じた際にも追従できる構成としている。このとき、トラス部材１５の曲げ剛性の評価には、一般に用いられている連成解析モデルを用いた地震応答解析を行い、前記軸部材８に作用する上下方向の応力、変位に対して検討することとしている。
【００２３】
一方で、図５に示すように、地震等が発生し既存外壁構造体１の面内方向（既存外壁構造体１に平行な水平方向）の力が作用すると、新設構造物４は、この力に追随して変形し、建物が受ける力を緩和しようとする。また、前記既存外壁構造体１は、変形することなくラーメン構造に形成された補強フレーム２によりこの力を負担する。これらの挙動を図７に示す。
図７は図３と同様の平面図であるが、上記のような面内方向の力が作用することによって、既存外壁構造体１に対して固定されている固定部材１１と、新設構造物４に対して固定されているブラケット１３とが、軸部材８の軸線方向に相対水平移動した状態（回転部材９が軸部材８の軸線方向にずれた状態）を示している。このように、各々が独立に挙動する既存外壁構造体１と新設構造物４との面内水平方向の相対水平移動が、ピンローラー支承付き連結部材７によって許容されることによって、両者の挙動を阻害することのない構成となっている。
【００２４】
上述する構成によれば、前記既存外壁構造体１の補強構造は、補強フレーム２が前記既存外壁構造体１を支持するに際し、裏面側に一体的に取り付けられるのではなく、補強フレーム２に備えられた支持部材２ｂを介して線的もしくは点的に支持することから、補強フレーム２に支持されることにより前記既存外壁構造体１の剛性が高まり過ぎることがないため、面外方向の力が作用し、面外の曲げ変形が生じた際にも、既存外壁構造体１の下部で補強した既存基礎部３との取り合い部近傍に、大きな曲げモーメントが生じることはなく、該既存外壁構造体１の損傷を抑制することが可能となる。
【００２５】
また、新設構造物４と補強フレーム２に支持された既存外壁構造体１とを、補強フレーム２の頂部近傍にのみ設けられたピンローラー支承付き連結部材７で連結する既存外壁構造体１の補強構造は、剛性の異なる既存外壁構造体１と新設構造物４とを連結しても挙動に応じて、両者を絶縁することが可能となる。
また、地震等が発生し既存外壁構造体１の面外方向の力が作用した場合には、新設構造物４は、層間変形を生じるような挙動を示すこととなるが、剛性の高い既存外壁構造体１の頂部とピンローラー支承付き連結部材７を介して連結されていることから、該既存外壁構造体１の面外方向の曲げ剛性により、新設構造物４に作用する面外方向の力を吸収し、新設構造物４の層間変形を抑制することが可能となる。
【００２６】
【発明の効果】
請求項１記載の既存外壁構造体の支持構造によれば、既存構造物の解体に際し、該既存構造物を構成する既存外壁構造体の一部を保存して自立させるとともに、既存構造物の解体跡地に新設構造物を構築し、該新設構造物に前記既存外壁構造体を支持する既存外壁の支持構造であって、保存したい既存外壁構造体は、その裏面側に所定の離間間隔をもって平行に配される補強フレームに支持されており、該補強フレームが、前記既存外壁と同様の大きさの鉛直面を有する補強フレーム本体と、該補強フレーム本体の一方の鉛直面に、高さ方向に所定の間隔をもって複数設けられ、前記既存外壁構造体に向けて水平に突出する支持部材とを備えてなり、該支持部材の端部が、前記既存外壁構造体の裏面に固定手段を介して固定されることから、補強フレームに支持されることにより前記既存外壁構造体の剛性が高まり過ぎることがないため、面外方向の力が作用し、面外の曲げ変形が生じた際にも、既存外壁構造体の下部で補強した既存基礎部との取り合い部近傍に、大きな曲げモーメントが生じることはなく、該既存外壁構造体の損傷を抑制することが可能となる。
【００２７】
請求項２記載の既存外壁構造体の支持構造によれば、前記既存外壁構造体を支持する補強フレームには、前記補強フレーム本体の他方の鉛直面における頂部近傍で前記新設構造物の所定の階層の床面と同一の高さ位置に、丸棒状の軸部材と、該軸部材に貫通されて該軸部材に対してその軸線方向に相対水平移動自在かつ該軸部材の周方向に相対回転自在な回転部材とを有してなるピンローラー支承付き連結部材の一方の端部が、前記軸部材の軸線方向が水平かつ前記補強フレーム本体と平行となるように配置されて固定部材を介して取り付けられているとともに、前記新設構造物には、所定の階層に前記補強フレームに向けて張出し床が水平に設けられていて、該張り出し床の端部に、前記ピンローラー支承付き連結部材の他方の端部がブラケットを介して取り付けられることにより、前記既存外壁構造体を支持する前記補強フレームがその頂部近傍に取り付けられた前記ピンローラー支承付き連結部材を介して前記新設構造物に連結されることによって、該補強フレームが前記軸部材の軸線方向への相対水平移動と該軸部材の周方向への相対回転が自在な状態で前記新設構造物により支持されているから、剛性の異なる既存既存外壁構造体と新設構造物とを連結しても挙動に応じて、両者を絶縁することが可能となる。
【００２８】
地震等が発生し既存外壁構造体の面外方向の力が作用した場合には、新設構造物は、層間変形を生じるような挙動を示すこととなるが、剛性の高い既存外壁構造体の頂部とピンローラー支承付き連結部材を介して連結されていることから、該既存外壁構造体の面外方向の曲げ剛性により、新設構造物に作用する面外方向の力を吸収し、新設構造物の層間変形を抑制することが可能となる。また、両者がほぼ同様な挙動を示すことから、両者間のクリアランスＬを大きくとる必要がなく、ピンローラー支承付き連結部材を取り付けていない張出し床と既存外壁構造体との間に、エキスパンション・ジョイントを取り付ける際にも小型化することができるため、意匠性を向上することができるとともに、コストを大幅に削減することが可能となる。
【００２９】
さらに、最小限のスペースで前記既存外壁構造体を新設構造物に利用保存できるとともに、両者の間に生じる空間に張出し床が配されるため、空間を有効利用することが可能となる。
【図面の簡単な説明】
【図１】本発明に係る既存外壁構造体と新設構造物の支持構造の側面を示す図である。
【図２】本発明に係る補強フレームとピンローラー支承付き連結部材の取り付け状況を示す図である。
【図３】本発明に係るピンローラー支承付き連結部材の平面を示す図である。
【図４】本発明に係るピンローラー支承付き連結部材の側面を示す図である。
【図５】本発明に係る地震時の既存外壁構造体と新設構造物の全体の挙動を示す図である。
【図６】本発明に係る地震時の既存外壁構造体と新設構造物の面外方向の挙動を示す図である。
【図７】本発明に係る地震時の既存外壁構造体と新設構造物の面内水平方向の挙動を示す平面図である。
【符号の説明】
１既存外壁構造体
２補強フレーム
２ａ補強フレーム本体
２ｂ支持部材
３既存基礎部
４新設構造物
５新設基礎部
６，６ａ張出し床
７ピンローラー支承付き連結部材
８軸部材
９回転部材
１０連結部材
１１固定部材
１２つなぎ部材
１３ブラケット
１４頬杖部材
１５トラス部材 [0001]
BACKGROUND OF THE INVENTION
The present invention preserves a part of the existing outer wall structure constituting the existing structure and makes it self-supporting, constructs a new structure on the dismantling site of the existing structure, and installs the existing outer wall structure on the new structure. The present invention relates to a support structure for an existing outer wall to be supported.
[0002]
[Prior art]
In recent years, modern buildings are often demolished for reasons such as aging and earthquake resistance. However, since these buildings are historically high in value, there is an increasing need to preserve the building itself or a part of the structural members constituting the building.
Under such circumstances, as shown in Patent Document 1, when storing the outer wall surface of an existing building, the outer wall surface is integrated with a reinforced concrete plate and cut into an arbitrary size, and this is used as a new exterior plate. A method for use in a structure is disclosed.
[0003]
[Patent Document 1]
JP 54-77424 A (see FIG. 4)
[0004]
On the other hand, when the outer wall surface of an existing building is made independent as an existing outer wall structure including existing outer pillars and is used for a new structure, it stands independently on the back side of the existing outer wall structure. A construction is generally used in which a reinforcing frame to be installed is constructed, the reinforcing frame and the wall surface are integrated, and the reinforcing frame and a new structure are connected using an expansion joint or the like.
[0005]
[Problems to be solved by the invention]
However, in the above-described configuration, the rigidity is improved by integrating the reinforcing frame and the existing outer wall structure, and a large bending moment is likely to be generated in the leg portion that engages with the foundation structure, and cracks and the like are generated. Cheap. In addition, in order to make the existing outer wall structure self-supporting, the reinforcing frame tends to be a large-scale structure, and there are many cases where an unusable space is generated between the new structure and the existing outer wall structure.
[0006]
In view of the above circumstances, an object of the present invention is to provide a support structure for an existing outer wall for storing an existing outer wall structure connected to the new structure with a simple structure and high safety and low cost. Yes.
[0007]
[Means for Solving the Problems]
The support structure for an existing outer wall structure according to claim 1 is configured such that when disassembling an existing structure, a part of the existing outer wall structure constituting the existing structure is preserved and becomes self-supporting, and the existing structure is demolished. An existing outer wall support structure for constructing a new structure and supporting the existing outer wall structure on the new structure, and the existing outer wall structure to be stored is arranged in parallel on the back surface side with a predetermined separation interval. The reinforcing frame is supported by a reinforcing frame having a vertical surface having the same size as the existing outer wall, and one vertical surface of the reinforcing frame main body has a predetermined interval in the height direction. A plurality of support members projecting horizontally toward the existing outer wall structure, and an end portion of the support member is fixed to the back surface of the existing outer wall structure via a fixing means. As a feature That.
[0008]
3. The support structure for an existing outer wall structure according to claim 2, wherein the reinforcing frame that supports the existing outer wall structure includes a floor of a predetermined level of the new structure near the top of the other vertical surface of the reinforcing frame body. A round rod-shaped shaft member at the same height as the surface, and a rotation that is penetrated by the shaft member so as to be relatively horizontally movable in the axial direction relative to the shaft member and relatively rotatable in the circumferential direction of the shaft member One end of a connecting member with a pin roller support having a member is disposed so that the axial direction of the shaft member is horizontal and parallel to the reinforcing frame body, and is attached via a fixing member. together are, wherein the new structure, overhanging the floor is provided horizontally toward the reinforcing frame to a predetermined hierarchy, the end of the overhang bed, the other end of the pin roller bearing with coupling member There bracket The reinforcing frame that supports the existing outer wall structure is connected to the new structure through the pin roller-supported connecting member that is attached in the vicinity of the top of the reinforcing frame. Is supported by the new structure in a state in which the shaft member can be relatively horizontally moved in the axial direction and can be relatively rotated in the circumferential direction .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The support structure for the existing outer wall structure according to the present invention is constructed by supporting a reinforcement frame in the vicinity of the back side of the existing outer wall structure and supporting it through a support member so that the existing outer wall structure to be preserved can stand on its own. and overhanging floor provided toward the reinforcing frame with the top vicinity of the reinforcing frame from the new structure, by supporting via the pin roller bearing with connecting member having a movable pin roller bearing of horizontal movement and rotation The structural safety of the existing outer wall structure supported by the reinforcing frame is ensured.
[0010]
As shown in FIG. 1, among the structures constituting the existing structure, the existing outer wall structure 1 to be stored is erected on each of the existing outer wall main body 1a and both sides of the existing outer wall main body 1a. It is comprised by the existing pillar 1b which makes a pair. These existing outer wall structures 1 are supported by a reinforced existing foundation 3 and supported by a reinforcing frame 2 provided on the back side and constructed integrally with the reinforced existing foundation 3. Yes.
In the present embodiment, a new structure 4 is constructed on the back side of the existing outer wall structure 1 with the reinforcing frame 2 interposed therebetween, and the existing outer wall structure 1 is reused as the outer wall of the new structure 4. cage shows a configuration in which the reinforcing frame 2 which supports the existing outer wall structure 1 is supported by the new structure 4. Therefore, the reinforced existing foundation 3 is integrated with the newly installed foundation 5 of the new structure 4, and the existing foundation 3 supporting the existing outer wall structure 1 and the reinforcing frame 2 is thereby installed in the new structure. 4 is supported by the new foundation 5, so that the entire structure is stable and does not cause uneven settlement.
[0011]
The reinforcing frame 2 provided on the back side of the existing outer wall structure 1 includes a reinforcing frame main body 2a and a support member 2b. The reinforcing frame body 2a is made of a steel frame and is formed in a frame shape having substantially the same size as the vertical surface of the existing outer wall structure 1. In the present embodiment, as shown in FIG. 2, the horizontal member is located at the same height as the position where the beam 1c included in the existing outer wall structure 1 is arranged in the opening of the reinforcing frame body 2a. 2c is bridged, but it is not necessarily sticking to this, and it can be erected independently, and has a performance as a ramen structure that can bear this force when a force acts in the in-plane direction. Any shape may be used.
[0012]
A plurality of support members 2b are fixed to the reinforcing frame main body 2a with fixing means on one vertical surface through a fixing means. The support member 2b is made of a highly rigid member, and is provided so as to protrude from one surface of the reinforcing frame body 2a, and the protruding end portion is fixed to the back surface of the existing outer wall structure 1 through a fixing means. Thus, the existing outer wall structure 1 is supported by the reinforcing frame 2. In the present embodiment, a slab material that is approximately the same as or substantially shorter than the length of the reinforcing frame main body 2a is used for the support member 2b, which is disposed at the same height as the horizontal member 2c, and the existing outer wall structure The body 1 is configured to be supported at the position of the included beam 1c. Thereby, this support member 2b can support the existing outer wall structure 1 more safely.
As described above, in the present embodiment, the reinforcing frame 2 is configured to support the existing outer wall structure 1 with a line. However, the present invention is not necessarily limited to this, and a protrusion-shaped member is used for the support member 2b. The existing outer wall structure 1 is supported by the reinforcing frame 2 by, for example, supporting the existing outer wall structure 1 with dots by disposing a plurality of the reinforcing frame main body 2a near the both side end portions with a predetermined spacing in the height direction. Any member can be used as long as it is a member that can be supported.
[0013]
When the existing outer wall structure 1 is supported, the reinforcing frame 2 having the above-described configuration is not attached integrally to the back surface side, but is linear or dotted via a support member 2b provided on the reinforcing frame 2. Since the rigidity of the existing outer wall structure 1 is not excessively increased by being supported by the reinforcing frame 2, an out-of-plane force is applied and an out-of-plane bending deformation occurs. However, a large bending moment does not occur in the vicinity of the joint portion with the existing base portion 3 reinforced at the lower portion of the existing outer wall structure 1, and damage to the existing outer wall structure 1 can be suppressed.
[0014]
Next, the support structure of the existing outer wall when the existing outer wall structure 1 supported by the reinforcing frame 2 described above is used as the outer wall of the new structure 4 is shown below.
[0015]
As shown in FIG. 1, the new structure 4 constructed on the back side of the existing outer wall structure 1 with the reinforcing frame 2 sandwiched is extended from the side surface facing the other surface of the reinforcing frame 2 at each floor height. 6 is built. The overhanging floor 6 is arranged at a height position where the existing outer wall structure 1 exists, although the overhanging length is not limited for those located above the existing outer wall structure 1. As for the thing, when the existing outer wall structure 1 supported by the reinforcing frame 2 receives a force in an out-of-plane direction and is deformed, it is formed to a length that ensures a clearance L that does not interfere. ing.
[0016]
On the other hand, on the other surface of the reinforcing frame main body 2a facing the new structure 4, the connecting member 7 with pin roller support is provided so as to protrude.
As shown in FIG. 2, the connecting member 7 with a pin roller support is a round bar-shaped shaft member 8, and penetrates the shaft member 8 and freely slides in the length direction (axial direction) of the shaft member 8. Via a rotating member 9 that freely rotates in the circumferential direction, a bracket 13 provided in the rotating member 9, and a connecting member 10 that is arranged in parallel to the shaft member 8 and fixed to both ends of the shaft member 8. It is comprised by the fixed member 11 connected.
That is, in the connecting member 7 with the pin roller support having such a configuration, the fixing member 11 connected to the shaft member 8 and the bracket 13 provided on the rotating member 9 are relatively horizontal in the axial direction of the shaft member 8. The movement and the relative rotation of the shaft member 8 in the circumferential direction are freely configured.
[0017]
In the present embodiment, as shown in FIG. 3, the two shaft members 8 are spaced apart from each other at positions where they form the same straight line, and are connected to the side surfaces of the fixing member 11 via a connecting member 10. The configuration to do was shown. Along with this, the rotating member 9 is also provided on each of the two shaft members 8, and two rotating members 9 are arranged facing each other through the shaft member 8. These rotating members 9 are connected by a rod-like connecting member 12 arranged in parallel to the shaft member 8, and a predetermined number of the brackets 13 are attached to the connecting member 12. However, the pin roller bearing with the connecting member 7 is not necessarily intended to stick thereto, and the shaft member 8, the fixing member 11 fixed to the shaft member 8, the relative rotation in the circumferential direction with respect to the shaft member 8 The rotating member 9 is freely movable and relatively horizontally movable in the axial direction , and the rotating member 9 includes a bracket 13. The bracket 13 can freely perform the above relative rotation and horizontal relative movement with respect to the fixed member 11. Any shape may be used as long as it has a configuration.
[0018]
As shown in FIGS. 2 to 4, the connecting member 7 with the pin roller support is formed so that the shaft member 8 protrudes horizontally on the other surface side of the reinforcing frame main body 2 a and the shaft member 8. The axial direction is arranged horizontally and parallel to the reinforcing frame main body 2a, and the fixing member 11 as one end thereof is fastened to the reinforcing frame main body 2a via fastening means. At this time, the height position of the connecting member 7 with pin roller support with respect to the reinforcing frame 2 is set at the same height position as the overhanging floor 6a of the new structure 4 provided near the top and adjacent thereto. ing. Incidentally, the lower portion of the fixing member 11 is provided with a Hozue member 14, by fixing through a fixing means該頬wand 14 to the reinforcing frame body 2a, horizontality of the fixed member 11 is maintained.
[0019]
On the other hand, as shown in FIG. 1, the overhanging floor 6a of the new structure 4 provided at the same height position as the connecting member 7 with the pin roller support is formed so that the overhanging length is shorter than the others. The combination of the length of the connecting member 7 with pin roller support and the length of the overhanging floor 6a when the fixing member 11 and the bracket 13 are arranged horizontally is the reinforcing frame 2 and the new structure 4 The length is adjusted so as to be a separation distance.
Further, as shown in FIG. 4, the overhanging floor 6 a provided at the same height position as the connecting member 7 with pin roller support has a notch that fits the end of the bracket 13 on the upper surface of the end. The bracket 13 is fitted in the notch, and both are fastened through fastening means. As a result, the existing outer wall structure 1 supported by the reinforcing frame 2 is connected to the new structure 4 via the connecting member 7 with the pin roller support.
[0020]
As described above, the existing outer wall structure 1 supported by the reinforcing frame 2 is supported by the new structure 4 via the pin roller-supported connecting member 7 provided only near the top of the reinforcing frame 2. The outer wall structure 1 is supported by the reinforcing frame 2 so that the structure is highly rigid. On the other hand, the new structure 4 is more rigid than the existing outer wall structure 1 in consideration of seismic performance. It is intended to absorb the difference in behavior caused by the difference in rigidity between the two.
[0021]
For example, as shown in FIG. 5, when an earthquake or the like occurs and a force in an out-of-plane direction of the existing outer wall structure 1 (a direction away from or in contact with the new structure 4 ) acts, the new structure 4 undergoes interlayer deformation. Although it will show such a behavior, since it is connected to the top part of the existing outer wall structure 1 having high rigidity through the connecting member 7 with the pin roller support, it is in the out-of-plane direction of the existing outer wall structure 1. The bending rigidity absorbs the force in the out-of-plane direction acting on the new structure 4 and suppresses interlayer deformation of the new structure 4. Schematically shows these behaviors in FIG.
FIG. 6A shows a situation in which a force in the outward direction from the back surface of the existing outer wall structure 1 acts on the new structure 4. In such a case, a force in the outward direction from the back surface is applied to the existing outer wall structure 1 from the new structure 4, and a bending moment is generated in the vicinity of the lower portion of the existing outer wall structure 1. Since the structure 1 is only supported linearly or in a dotted manner as described above with respect to the reinforcing frame 2 that supports the structure 1, the rigidity is low because it is not completely integrated. The bending moment is small and does not cause damage such as cracks.
FIG. 6B shows a situation in which a force in the outward direction from the surface of the existing outer wall structure 1 acts on the new structure 4. Here, the bracket 13 rotates about the shaft member 8 of the connecting member 7 with the pin roller support via the rotating member 9, so that the new structure 4 faces the force in the out-of-plane direction only for its own proof strength. Therefore, an excessive out-of-plane force is not transmitted to the existing outer wall structure 1.
[0022]
In addition, when the behavior which the bracket 13 rotates arises, the force which gives the displacement to the said fixing member 11 also to the perpendicular direction has arisen. In the present embodiment, as shown in FIG. 3, a horizontal truss member 15 is provided on the back side of the reinforcing frame body 2a, and the fixing frame 11 is fixed to the reinforcing frame body 2a via the truss member 15, The rigidity in the out-of-plane direction (vertical direction) of the truss member 15 is adjusted as appropriate so that the truss member 15 can follow even when a force that causes displacement in the vertical direction is generated on the fixing member 11 described above. . At this time, in order to evaluate the bending rigidity of the truss member 15 , an earthquake response analysis using a commonly used coupled analysis model is performed to examine the vertical stress and displacement acting on the shaft member 8. I am going to do that.
[0023]
On the other hand, as shown in FIG. 5, when an earthquake or the like occurs and a force in the in-plane direction of the existing outer wall structure 1 (horizontal direction parallel to the existing outer wall structure 1) acts, the new structure 4 Deforms to follow and tries to relieve the force the building receives. Further, the existing outer wall structure 1 bears this force by the reinforcing frame 2 formed in a ramen structure without being deformed. These behaviors are shown in FIG.
FIG. 7 is a plan view similar to FIG. 3, but the fixing member 11 fixed to the existing outer wall structure 1 and the new structure 4 are applied by the in-plane force as described above. The bracket 13 fixed with respect to the shaft member 8 is in a state of being relatively horizontally moved in the axial direction of the shaft member 8 (a state in which the rotating member 9 is displaced in the axial direction of the shaft member 8). Thus, the relative horizontal movement in the in-plane horizontal direction between the existing outer wall structure 1 and the new structure 4 that each behave independently is allowed by the connecting member 7 with the pin roller support. It has a configuration that does not hinder.
[0024]
According to the above-described configuration, the reinforcing structure of the existing outer wall structure 1 is provided not in the back side but integrally in the reinforcing frame 2 when the reinforcing frame 2 supports the existing outer wall structure 1. Since the support member 2b is supported linearly or in a point-like manner, the rigidity of the existing outer wall structure 1 is not excessively increased by being supported by the reinforcing frame 2, so that the force in the out-of-plane direction is increased. Even when an out-of-plane bending deformation occurs, a large bending moment does not occur in the vicinity of the joint portion with the existing base portion 3 reinforced at the lower portion of the existing outer wall structure 1, and the existing outer wall structure 1 can be suppressed.
[0025]
Further, the reinforcement of the existing outer wall structure 1 in which the new structure 4 and the existing outer wall structure 1 supported by the reinforcing frame 2 are connected by a connecting member 7 with a pin roller support provided only near the top of the reinforcing frame 2. As for the structure, even if the existing outer wall structure 1 and the new structure 4 having different rigidity are connected, it is possible to insulate both in accordance with the behavior.
Further, when an earthquake or the like occurs and an out-of-plane force of the existing outer wall structure 1 is applied, the new structure 4 will exhibit a behavior that causes interlayer deformation, but the existing outer wall having high rigidity. Since it is connected to the top of the structure 1 via the connecting member 7 with pin roller support, the out-of-plane force acting on the new structure 4 due to the bending rigidity in the out-of-plane direction of the existing outer wall structure 1 It becomes possible to suppress interlayer deformation of the new structure 4.
[0026]
【The invention's effect】
According to the support structure for an existing outer wall structure according to claim 1, when the existing structure is disassembled, a part of the existing outer wall structure constituting the existing structure is stored and self-supported, and the existing structure is disassembled. A new structure is constructed on the former site, and the existing outer wall structure is supported on the new structure by supporting the existing outer wall structure. The existing outer wall structure to be stored is parallel to the rear surface side with a predetermined separation interval. The reinforcing frame is supported by a reinforcing frame, and the reinforcing frame has a vertical surface having the same size as that of the existing outer wall, and one vertical surface of the reinforcing frame main body has a predetermined height direction. A plurality of support members projecting horizontally toward the existing outer wall structure, and an end portion of the support member is fixed to the back surface of the existing outer wall structure via a fixing means. From that Since the rigidity of the existing outer wall structure is not excessively increased by being supported by the strong frame, even when an out-of-plane force is applied and an out-of-plane bending deformation occurs, the lower part of the existing outer wall structure A large bending moment does not occur in the vicinity of the mating portion with the existing foundation reinforced with the above, and damage to the existing outer wall structure can be suppressed.
[0027]
According to the support structure for an existing outer wall structure according to claim 2, the reinforcing frame that supports the existing outer wall structure has a predetermined level of the new structure near the top of the other vertical surface of the reinforcing frame body. A round bar-shaped shaft member at the same height as the floor of the shaft, and penetrated through the shaft member so as to be relatively horizontally movable in the axial direction relative to the shaft member and relatively rotatable in the circumferential direction of the shaft member One end of a pin roller-supported connecting member having a rotating member is arranged so that the axial direction of the shaft member is horizontal and parallel to the reinforcing frame body, and is attached via a fixing member together are, in the new structure, overhanging the floor is provided horizontally toward the reinforcing frame to a predetermined hierarchy, the end of the overhang bed, the other of the pin roller bearing with coupling member bra end By attaching to the new structure through the pin roller support connecting member attached in the vicinity of the top of the reinforcing frame that supports the existing outer wall structure Since the reinforcing frame is supported by the new structure in such a manner that the horizontal movement of the shaft member in the axial direction and the relative rotation of the shaft member in the circumferential direction can be freely performed, the existing existing outer wall structure having different rigidity is provided. Even if the new structure is connected to the new structure, they can be insulated according to the behavior.
[0028]
When an earthquake or the like occurs and an out-of-plane force is applied to the existing outer wall structure, the new structure will behave like an interlayer deformation, but the top of the existing outer wall structure with high rigidity Because of the bending rigidity in the out-of-plane direction of the existing outer wall structure, the out-of-plane force acting on the new structure is absorbed by the existing outer wall structure. Interlayer deformation can be suppressed. In addition, since both of them exhibit almost the same behavior, it is not necessary to provide a large clearance L between the two, and an expansion joint is provided between the overhanging floor and the existing outer wall structure to which no connecting member with a pin roller support is attached. Since the size can be reduced also when attaching, the design can be improved and the cost can be greatly reduced.
[0029]
Furthermore, since the existing outer wall structure can be used and stored in a new structure with a minimum amount of space, an overhanging floor is arranged in the space generated between the two, so that the space can be used effectively.
[Brief description of the drawings]
FIG. 1 is a diagram showing a side view of a support structure for an existing outer wall structure and a new structure according to the present invention.
FIG. 2 is a view showing a mounting state of a reinforcing frame and a connecting member with a pin roller support according to the present invention.
FIG. 3 is a plan view of a connecting member with a pin roller support according to the present invention.
FIG. 4 is a side view of a connecting member with a pin roller support according to the present invention.
FIG. 5 is a diagram showing the overall behavior of an existing outer wall structure and a new structure during an earthquake according to the present invention.
FIG. 6 is a diagram showing the behavior in the out-of-plane direction of an existing outer wall structure and a new structure during an earthquake according to the present invention.
FIG. 7 is a plan view showing in- plane horizontal behavior of an existing outer wall structure and a new structure during an earthquake according to the present invention.
[Explanation of symbols]
1 Existing outer wall structure 2 Reinforcement frame
2a Reinforcement frame body
2b Support member 3 Existing foundation 4 New structure 5 New foundation
6, 6a Overhang floor 7 Connecting member with pin roller support 8 Shaft member 9 Rotating member 10 Connecting member 11 Fixing member 12 Linking member 13 Bracket 14 Cheek cane member
15 Truss members

Claims

When dismantling the existing structure, a part of the existing outer wall structure that constitutes the existing structure is preserved to be self-supporting, and a new structure is constructed on the dismantling site of the existing structure, and the existing structure is added to the existing structure. A support structure for an existing outer wall that supports the outer wall structure,
The existing outer wall structure to be preserved is supported by a reinforcing frame arranged in parallel with a predetermined spacing on the back side thereof,
A reinforcing frame body having a vertical surface having the same size as the existing outer wall;
A plurality of support members provided at predetermined intervals in the height direction on one vertical surface of the reinforcing frame main body and projecting horizontally toward the existing outer wall structure are provided. The structure for supporting an existing structure is fixed to a back surface of the existing outer wall structure through a fixing means.

In the support structure of the existing structure of Claim 1,
The reinforcing frame that supports the existing outer wall structure has a round bar-shaped shaft member at the same height as the floor of the predetermined level of the new structure near the top of the other vertical surface of the reinforcing frame main body. And a rotating member that is penetrated by the shaft member, is rotatable relative to the shaft member in the axial direction thereof, and is rotatable in the circumferential direction of the shaft member. One end portion is disposed so that the axial direction of the shaft member is horizontal and parallel to the reinforcing frame body, and is attached via a fixing member ,
The said new structure, overhanging the floor is provided horizontally toward the reinforcing frame to a predetermined hierarchy, the end of the overhang bed, the other end of the pin roller bearing with coupling member bracket By being attached via
The reinforcing frame that supports the existing outer wall structure is connected to the new structure via the pin roller-supported connecting member attached in the vicinity of the top of the reinforcing frame, so that the reinforcing frame is in the axial direction of the shaft member. A structure for supporting an existing structure , wherein the structure is supported by the new structure in a state in which relative horizontal movement to the shaft and relative rotation in the circumferential direction of the shaft member are possible.