JP2005016002A

JP2005016002A - Joining structure of reinforced concrete, construction method for reinforced concrete skeleton, construction method for reinforced concrete, and joining method for reinforced concrete

Info

Publication number: JP2005016002A
Application number: JP2003177780A
Authority: JP
Inventors: Akiyuki Watanabe; 明之渡邊; Tadayoshi Ishibashi; 忠良石橋
Original assignee: East Japan Railway Co
Current assignee: East Japan Railway Co
Priority date: 2003-06-23
Filing date: 2003-06-23
Publication date: 2005-01-20

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining structure of reinforced concrete, which reduces the length of a joint. <P>SOLUTION: In this joining structure, joining reinforcements 20 and 20, which are protruded from joining surfaces of the reinforced concrete 1 and the reinforced concrete 1, facing each other, are joined together in the state of partially overlapping each other, by placing concrete 2. The joining reinforcement 20 has such a shape as to be equipped with both parallel linear side parts 22 and a connecting part 23 whose linear or curved part continues from both the side parts 22 via a corner part 24 or a bent part 21. The concrete 2 is placed in a section which is surrounded by both the mutual side parts 22 and the connecting part 23. A force can be transmitted between the reinforced concrete 1 and the reinforced concrete 1 by depending on the concrete 2, and the joining structure can have sufficient strength. Additionally, the length L of the joint, which is required for the obtainment of an overlapping cross-sectional area almost as large as in the use of of a loop reinforcement, can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、場所打ちコンクリートやプレキャストコンクリート等の鉄筋コンクリートの接合構造、鉄筋コンクリートの製造方法、及び鉄筋コンクリートの接合方法に関する。
【０００２】
【従来の技術】
従来の鉄筋鉄筋コンクリート間の接合構造としては、例えば図１３に示すように、各鉄筋コンクリート部材６１、６１の接合面６３から突出する棒状の接合鉄筋６４を重ね合わせ、各鉄筋コンクリート部材６１、６１間にコンクリート６２を充填するものがある。あるいは図１４に示すように、接合鉄筋６４に棒状の添え筋６５を重ねあわせ、各鉄筋コンクリート部材６１、６１間にコンクリート６２を充填するものがある。
【０００３】
また抜け落ち防止等の目的で、図１５に示すように、各鉄筋コンクリート部材６１の接合面６３から突出するループ鉄筋６６を重ね合わせ、コンクリート６２を充填して接合するものがある。あるいは図１６に示すように、これらのループ鉄筋６６、６６間に環状の添え筋６７を重ね合わせ、コンクリート６２を充填して接合するものがある。さらに、ループ鉄筋６６と添え筋６７との重なり部分に補強鉄筋（図示せず）を通し、コンクリート６２を充填して接合するものもある（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００２−２２７１３０号公報
【０００５】
【発明が解決しようとする課題】
しかし、接合鉄筋やループ鉄筋を重ね合わせて用いる方法では、各鉄筋コンクリート部材間の強度を保つために、その重ね合わせる部分の長さ（継手長Ｌ）を充分に長くする必要があった。また添え筋を重ね合わせる方法では、その分だけ接合部が長くなるという問題があった。
【０００６】
ループ鉄筋同士を重ね合わせた場合には、各鉄筋コンクリート部材間にかかる引張荷重を、ループ鉄筋同士の重なり部分のコンクリートにかかる圧縮荷重に変換することができる。しかしその圧縮強度はループ鉄筋へのコンクリートの付着力に基づくため、重なり部分の鉄筋の長さに依存し、棒状の接合鉄筋同士よりは短いものの、やはり継手長Ｌを充分に長くする必要があった。
【０００７】
本発明の課題は、継手長のより短い鉄筋コンクリートの接合構造を提供することである。
【０００８】
【課題を解決するための手段】
以上の課題を解決するため、本発明の請求項１に記載の発明は、例えば図１に示すように、対向する鉄筋コンクリート（鉄筋コンクリート部材１、１）の接合面から突出した接合鉄筋２０、２０を互いに部分的に重ね合わせた状態でコンクリート２を打設して接合される構造において、接合鉄筋２０は、平行する直線状の両側部２２と、これら両側部２２から角部２４または折り曲げ部２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなし、互いの両側部２２及び連結部２３により囲まれた部分にコンクリート２が打設されてなることを特徴とする。
【０００９】
請求項１に記載の発明によれば、平行する直線状の両側部２２と、これら両側部２２から角部２４または折り曲げ部２１を介して直線部または曲線部が連続する連結部２３とを備える接合鉄筋２０、２０同士に囲まれる部分に充填されたコンクリート２に依存して鉄筋コンクリート１、１間で力を伝達することができ、鉄筋コンクリート１、１それぞれにかかる引張荷重や圧縮荷重を受け止め、充分な強度を有する接合構造とすることができる。また、平行する直線状の両側部２２と、これら両側部２２から角部２４または折り曲げ部２１を介して直線部または曲線部が連続する連結部２３とを備える接合鉄筋２０を用いたので、ループ筋を用いた場合と同程度の重なり断面積を得るために必要な継手長Ｌを、より短くすることができる。
【００１０】
請求項２に記載の発明は、請求項１に記載の鉄筋コンクリートの接合構造において、例えば図２（ｂ）に示すように、前記接合鉄筋２０の両側部２２、２２の少なくとも一方は互いに重ね合わされていることを特徴とする。
【００１１】
請求項２に記載の発明によれば、接合鉄筋２０の両側部２２、２２の少なくとも一方を互いに重ね合わせるので、両側部２２、２２の幅が異なる接合鉄筋２０同士でも鉄筋コンクリート１同士を接合することができる。また、同一の継手長Ｌにおける重なり断面積Ｓを最大にすることができ、さらに強度の増した接合構造とすることができる。
【００１２】
請求項３に記載の発明は、請求項１または２に記載の鉄筋コンクリートの接合構造において、例えば図２（ａ）に示すように、前記接合鉄筋２０は２つの両側部２２、２２で互いに重ね合わされていることを特徴とする。
【００１３】
請求項３に記載の発明によれば、接合鉄筋２０は２つの両側部２２、２２で互いに重ね合わされているので、同一の継手長Ｌにおける重なり断面積Ｓを最大にすることができ、さらに強度の増した接合構造とすることができる。
【００１４】
請求項４に記載の発明は、請求項１に記載の鉄筋コンクリートの接合構造において、例えば図２（ｃ）に示すように、前記接合鉄筋２０は少なくとも２箇所で互いに交差されていることを特徴とする。
【００１５】
請求項４に記載の発明によれば、接合鉄筋２０を少なくとも２箇所で互いに交差させる構造であるので、両側部２２、２２の幅や連結部２３の形状が異なる接合鉄筋２０同士でも鉄筋コンクリート１、１同士を接合することができる。
【００１６】
請求項５に記載の発明は、請求項４に記載の鉄筋コンクリートの接合構造において、例えば図３に示すように、前記接合鉄筋２０、２０は両側部２２、２２で重ならず、前記連結部２３のみで互いに交差されていることを特徴とする。
【００１７】
請求項５に記載の発明によれば、接合鉄筋２０、２０は両側部２２、２２で重ならず、連結部２３のみで互いに交差されているので、両側部２２、２２を可能な限り短くすることができ、継手長Ｌをさらに短くすることができる。
【００１８】
請求項６に記載の発明は、請求項２〜５のいずれか一項に記載の鉄筋コンクリートの接合構造において、前記接合鉄筋２０はその互いに重ねあわされた重なり部分またはその互いに交差された交差部分で互いに接合されていることを特徴とする。
【００１９】
請求項６に記載の発明によれば、接合鉄筋２０、２０をその互いに重ねあわされた重なり部分、またはその互いに交差された交差部分で互いに接合することにより、鉄筋コンクリート１、１間で力を伝達することができ、各鉄筋コンクリート１にかかる引張荷重や圧縮荷重をその接合部分で受け、さらに強度の増した接合構造とすることができる。
【００２０】
請求項７に記載の発明は、請求項１〜６のいずれか一項に記載の鉄筋コンクリートの接合構造において、前記角部２４または前記折り曲げ部２１または前記連結部２３には前記接合鉄筋２０と直交する補強鉄筋３０が配置されることを特徴とする。
【００２１】
請求項８に記載の発明は、請求項１〜７のいずれか一項に記載の鉄筋コンクリートの接合構造において、前記両側部２２、２２には前記接合鉄筋２０と直交する補強鉄筋３０が配置されることを特徴とする。
【００２２】
請求項７または８に記載の発明によれば、接合鉄筋２０と直交する補強鉄筋３０を配置することにより、さらに耐荷重の大きい接合構造とすることができる。
【００２３】
請求項９に記載の発明は、請求項７または８に記載の鉄筋コンクリートの接合構造において、前記補強鉄筋３０は前記接合鉄筋２０、２０同士に囲まれる部分に通されることを特徴とする。
【００２４】
請求項９に記載の発明によれば、接合鉄筋２０同士に囲まれる部分に補強鉄筋３０が通されるので、接合鉄筋２０、２０同士に囲まれる部分のコンクリート２の強度を高めることができ、さらに耐荷重の大きい接合構造とすることができる。
【００２５】
請求項１０に記載の発明は、請求項１〜９のいずれか一項に記載の鉄筋コンクリートの接合構造において、前記接合鉄筋２０は水平面、鉛直面、もしくは傾斜面に配置されることを特徴とする。
【００２６】
請求項１０に記載の発明によれば、接合鉄筋２０を水平面、鉛直面、もしくは傾斜面に配置することにより、鉄筋コンクリート１を水平方向、鉛直方向、もしくは傾斜方向に接合することができる。
【００２７】
請求項１１に記載の発明は、鉄筋コンクリート躯体の構築方法であって、平行する直線状の両側部２２、２２と、これら両側部２２、２２から角部２４または折り曲げ部２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０が側面から突出したプレキャストコンクリート部材１、１同士を並べ、前記接合鉄筋２０、２０同士を重ねた状態でプレキャストコンクリート部材１、１間にコンクリート２を充填し固化させることを特徴とする。
【００２８】
請求項１１に記載の発明によれば、平行する直線状の両側部２２、２２と、これら両側部２２、２２から角部２４または折り曲げ部２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０、２０同士を重ね、その重なり部分にコンクリート２を充填するので、接合鉄筋２０を介して各鉄筋コンクリート１、１にかかる引張荷重をコンクリート２にかかる圧縮荷重に変換することができ、耐荷重が大きくかつ継手長の短い接合構造を有する鉄筋コンクリート躯体を構築することができる。
【００２９】
請求項１２に記載の発明は、鉄筋コンクリートの構築方法であって、例えば図４に示すように、平行する直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０を側面に保持した型枠４０内に鉄筋籠４２を設置し、型枠４０内にコンクリート２を打設することを特徴とする。
【００３０】
請求項１２に記載の発明によれば、平行する直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０が側面（接合面３）から突出する鉄筋コンクリートを得ることができ、継手長Ｌを小さくした接合構造に用いることができる。
【００３１】
請求項１３に記載の発明は、鉄筋コンクリートの構築方法であって、平行する直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０を側面に保持した型枠４３内に鉄筋籠４２を設置し、型枠４３内にコンクリート２を打設して鉄筋コンクリート１を製造し、次いで前記接合鉄筋２０が突出する側面同士を対向させ、前記接合鉄筋２０同士を重ね合わせた状態で前記鉄筋コンクリート１を型枠４３内に並べ、前記対向する側面３及び型枠４３に囲まれる範囲にコンクリート２を打設することを特徴とする。
【００３２】
請求項１３に記載の発明によれば、平行な直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０が側面から突出する鉄筋コンクリート１を製造し、次いでその接合鉄筋２０が突出する側面３、３同士を対向させ、接合鉄筋２０、２０同士を重ね合わせた状態で鉄筋コンクリート１、１を型枠４３内に並べ、側面３、３及び型枠４３に囲まれる範囲にコンクリートを打設することで、小さな鉄筋コンクリート１、１が連続した、より大きな鉄筋コンクリートを製造することができる。
【００３３】
請求項１４に記載の発明は、鉄筋コンクリートの接合方法であって、平行な直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０を側面に保持した型枠４０内に鉄筋籠４２を設置し、型枠４０内にコンクリートを打設して鉄筋コンクリート１、１を製造し、次いで前記鉄筋コンクリート１、１同士を前記接合鉄筋２０、２０の突出する側面３、３が対向した状態で型枠４３内に並べ、前記対向させた側面３、３及び型枠４３に囲まれる範囲にコンクリートを打設することを特徴とする。
【００３４】
請求項１４に記載の発明によれば、平行な直線状の両側部２２、２２と、これら両側部２２、２２から角部２４、２４または折り曲げ部２１、２１を介して直線部または曲線部が連続する連結部２３とを備える形状をなす接合鉄筋２０を側面３に保持した鉄筋コンクリート１を製造し、次いで鉄筋コンクリート１同士を接合するので、短い継手長で鉄筋コンクリート１同士を接合することができる。
【００３５】
請求項１５に記載の発明は、対向する鉄筋コンクリート１、１の接合面３、３から突出した接合鉄筋５０、５０を互いに部分的に重ね合わせた状態でコンクリート２を打設して接合される接合構造において、例えば図１２に示すように、前記接合鉄筋５０は直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられていることを特徴とする。
【００３６】
請求項１５に記載の発明によれば、各鉄筋コンクリート１にかかる引張荷重を、接合鉄筋５０を介して平板５１、ナット５２、または節５３のいずれかによりコンクリート２にかかる圧縮荷重に変換するので、棒状の接合鉄筋を用いた場合よりも短い継手長Ｌで充分な強度を有する接合構造とすることができる。
【００３７】
請求項１６に記載の発明は、鉄筋コンクリート躯体の構築方法であって、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０、５０が側面から突出したプレキャストコンクリート部材１同士を並べ、前記接合鉄筋５０同士を重ねた状態でプレキャストコンクリート部材１、１間にコンクリートを充填し固化させることを特徴とする。
【００３８】
請求項１６に記載の発明によれば、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０、５０同士を重ね、その重なり部分にコンクリート２を充填するので、接合鉄筋５０を介して各鉄筋コンクリート１、１にかかる引張荷重をコンクリート２にかかる圧縮荷重に変換することができ、耐荷重が大きくかつ継手長の短い接合構造を有する鉄筋コンクリート躯体を構築することができる。
【００３９】
請求項１７に記載の発明は、鉄筋コンクリートの構築方法であって、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０を側面に保持した型枠４０内に鉄筋籠４２を設置し、型枠４０内にコンクリートを打設することを特徴とする。
【００４０】
請求項１７に記載の発明によれば、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０が側面（接合面３）から突出する鉄筋コンクリート１を得ることができ、継手長Ｌを小さくした接合構造に用いることができる。
【００４１】
請求項１８に記載の発明は、鉄筋コンクリートの構築方法であって、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０を側面に保持した型枠４０内に鉄筋籠４２を設置し、型枠４０内にコンクリートを打設して鉄筋コンクリート１を製造し、次いで前記接合鉄筋５０が突出する側面３同士を対向させ、前記接合鉄筋５０同士を重ね合わせた状態で前記鉄筋コンクリート１、１を型枠４３内に並べ、前記対向する側面３、３及び型枠４３に囲まれる範囲にコンクリートを打設することを特徴とする。
【００４２】
請求項１８に記載の発明によれば、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０が側面から突出する鉄筋コンクリート１を製造し、次いでその接合鉄筋５０が突出する側面３、３同士を対向させ、接合鉄筋５０同士を重ね合わせた状態で鉄筋コンクリート１、１を型枠４３内に並べ、側面３、３及び型枠４３に囲まれる範囲にコンクリートを打設することで、小さな鉄筋コンクリート１、１が連続した、より大きな鉄筋コンクリートを製造することができる。
【００４３】
請求項１９に記載の発明は、鉄筋コンクリートの接合方法であって、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０を側面に保持した型枠４０内に鉄筋籠４２を設置し、型枠４０内にコンクリートを打設して鉄筋コンクリート１を製造し、次いで前記鉄筋コンクリート１同士を前記接合鉄筋５０の突出する側面３、３が対向した状態で型枠４３内に並べ、前記対向させた側面３、３及び型枠４３に囲まれる範囲にコンクリートを打設することを特徴とする。
【００４４】
請求項１９に記載の発明によれば、直線状の棒状部の先端に平板５１、ナット５２、または節５３のいずれかが設けられた接合鉄筋５０を側面３に保持した鉄筋コンクリート１を製造し、次いで鉄筋コンクリート１同士を接合するので、短い継手長で鉄筋コンクリート１同士を接合することができる。
【００４５】
【発明の実施の形態】
以下に、本発明の第１の実施の形態例について詳細に述べる。図１は、２つの平板状の鉄筋コンクリート部材１の接合構造を示す図である。なお鉄筋コンクリート部材１としては、例えば建物の床板、壁板や屋根板等に用いるもの、あるいは橋桁や港湾・海洋構造物、地中構造物等に用いるものが挙げられる。
【００４６】
各鉄筋コンクリート部材１、１の対向する接合面３、３からは、接合鉄筋２０が垂直に突出し、接合面３、３間にコンクリート２が充填される。
接合鉄筋２０は、平行する直線状の両側部２２、２２と、これら両側部２２、２２から折り曲げ部２１を介して連結部２３とを備える形状をなしている。接合鉄筋２０としては、ダボ筋等を用いることができる。
【００４７】
折り曲げ部２１は棒状の鉄筋を折り曲げた部分であり、両側部２２、２２を互いに平行にしている。なお折り曲げ部２１の局率半径ｒは、両側部の間隔ｄの１／２未満であることが好ましい。曲率半径ｒが０の場合には、折り曲げ部２１は図１（ｃ）に示すように、角部２４となる。
両側部２２、２２の折り曲げ部２１、２１と反対側の端部は、図１に示すように、鉄筋コンクリート部材１に埋設されている。
連結部２３は、２個所の折り曲げ部２１、２１の間を連絡しており、接合鉄筋２０にかかる引張荷重をコンクリート２に伝達する。連結部２３は直線状であってもよいし、また例えば螺旋状、折曲線状等の曲線状であってもよい。
【００４８】
２つの鉄筋コンクリート部材１、１の接合鉄筋２０、２０同士は２箇所で交差するよう重ねて配置され、接合鉄筋２０、２０間の隙間を塞ぐようにコンクリート２が充填される。このようにコンクリート２を充填することにより、コンクリート２に依存して鉄筋コンクリート部材１、１間で力を伝達することができる。両鉄筋コンクリート部材１、１間に引張力が働いた時には、コンクリート２の両接合鉄筋２０、２０に囲まれた部分は、折り曲げ部２１や、連結部２３から内側に向かって圧縮荷重を受ける。このように鉄筋コンクリート部材１、１間にかかる引張荷重をコンクリート２にかかる圧縮荷重に変えることにより、充分な強度を有する接合構造とすることができる。
【００４９】
さらに、本発明の接合構造では、接合鉄筋２０として、２箇所の折り曲げ部２１、２１を有するＵ字筋を用いたので、ループ筋を用いた場合と同程度の重なり断面積を得るために必要な継手長Ｌを、ループ筋を用いた場合よりも短くすることができる。
【００５０】
また、重ね合わせた接合鉄筋２０同士は、溶接したり、鋼線等で結束したりして接合してもよい。なお、図２（ａ）に示すように、両側部２２同士が互いに重なるように配置してもよい。両側部２２同士を接合した場合には、その接合部分により引張荷重や圧縮荷重を伝達することができ、さらに強度を大きくすることができる。
【００５１】
あるいは、図３に示すように、２個所の折り曲げ部２１、２１同士が互いに重なるように配置してもよい。折り曲げ部２１で重ねる場合には、両側部２２を可能な限り短くすることができ、継手長Ｌをさらに短くすることができる。
【００５２】
接合鉄筋２０同士の幅が異なる場合には、例えば図２（ｂ）に示すように、いずれか一方の両側部２２同士が重なり合い、他の１箇所で交差するように配置してもよいし、例えば図２（ｃ）に示すように、２箇所で交差するように配置してもよい。接合鉄筋２０同士の交差部分は溶接したり、鋼線等で結束したりして接合してもよい。
【００５３】
なお、折り曲げ部２１や両側部２２、連結部２３に、接合鉄筋２０と垂直に補強鉄筋３０を溶接または結束して設けてもよい。補強鉄筋３０を設けることで、さらに強固な接合構造とすることができる。
補強鉄筋３０は、接合鉄筋２０同士に囲まれる部分の外側に設けてもよいし、あるいは接合鉄筋２０同士に囲まれる部分に通してもよい。接合鉄筋２０同士に囲まれる部分に補強鉄筋３０を通した場合には、接合鉄筋２０同士に囲まれる部分のコンクリート２の強度を高めることができ、さらに耐荷重の大きい接合構造とすることができる。
【００５４】
次に、鉄筋コンクリート部材１の構築方法について説明する。まず図４に示すように、型枠４０内に鉄筋籠４２を設置する。型枠４０の外周には、差し筋止め治具４１が設けられている。差し筋止め治具４１は、接合鉄筋２０を保持している。接合鉄筋２０は両側部２２で型枠４０を貫通しており、その折り曲げ部２１及び連結部２３が型枠４０の外側に、両側部２２の両端が型枠４０の内側に向いている。接合鉄筋２０は型枠４０内にコンクリートを打設することにより鉄筋籠４２に接合されるが、あらかじめ溶接または結束して接合してもよい。
次に型枠４０内にコンクリートを打ち込み、養生する。コンクリートが充分な脱型強度まで固化したら、型枠４０を外す。なお鉄筋コンクリート部材１の構築は現場で行ってもよいし、工場で行ってもよい。
【００５５】
次に、構築した鉄筋コンクリート部材１同士の接合方法について説明する。まず図５に示すように、上述の鉄筋コンクリート部材１の接合面３同士を向かい合わせ、接合鉄筋２０同士を継手長Ｌで重ね合わせる。また、接合鉄筋２０には、必要に応じて補強鉄筋３０を溶接または結束して接合する。
【００５６】
各鉄筋コンクリート部材１、１を囲むように型枠４３を設け、各鉄筋コンクリート部材１、１の接合面３、３及び型枠４３に囲まれる部分にコンクリート２を充填する。このとき接合鉄筋２０や補強鉄筋３０の間にコンクリート２が行き渡るようにする。
コンクリート２が充分な脱型強度まで固化したら、型枠４３をはずす。以上のようにして、鉄筋コンクリート部材１同士を接合することができる。
【００５７】
あるいは、小さな鉄筋コンクリート部材１同士を上述のようにして接合することにより、さらに大きな鉄筋コンクリート部材を構築してもよい。例えば、図６に示すように、型枠４３内にさらに、接合鉄筋２０を保持した差し筋止め治具４１が設けられた型枠４４を設ける。まず型枠４３と型枠４４とに囲まれる部分にコンクリートを打設し、鉄筋コンクリート部材１、１を製造する。その後型枠４４を取り除き、鉄筋コンクリート部材１、１の接合面３及び型枠４３に囲まれる部分にコンクリートを打設し、さらに大きな鉄筋コンクリート部材としてもよい。
なお、接合鉄筋２０や鉄筋籠４２にプレストレスを導入してもよい。
【００５８】
以上のようにして鉄筋コンクリート部材１を接合し、コンクリート躯体を構築することができる。本実施の形態の継手構造によれば、ループ鉄筋同士を重ね合わせる場合よりも短い継手長Ｌで、重なり部分のコンクリート２の断面積Ｓを充分に確保することができる。
なお以上の例では、平板状の鉄筋コンクリート部材１を横に２枚並べて接合したが、例えば図７に示すように、２枚の鉄筋コンクリート部材１、１を垂直に配置して接合してもよい。その場合には、図７に示すように、互いの接合鉄筋２０の両側部２２と連結部２３とを溶接または結束により接合してもよい。
【００５９】
また、図１〜７においては、連結部２３は、接合面３に平行であるが、例えば床の張り出しや切妻屋根等、力学的に一様でない部分の接合構造では、図８に示すように、接合面３に対して斜めにしてもよい。また、連結部２３にさらに折り曲げ部を設けてもよく、例えば図９に示すように、２つの鉄筋コンクリート部材１ａ、１ｂの接合角度によって任意に折り曲げ部を設けてもよい。
【００６０】
また両側部２２や連結部２３の接合面３や板面に対する角度もそれに合わせて適宜変更することが可能である。例えば図１〜８では接合鉄筋２０の連結部２３は鉄筋コンクリート部材１の板面と垂直に配置されているが、図１０に示すように、板面に対して平行に配置してもよい。その場合にも同様に、接合鉄筋２０を互いに両側部２２、もしくは折り曲げ部２１で溶接または結束により接合することができる。
【００６１】
また図１１（ａ）に示すように、接合鉄筋２０の連結部２３を板面に対して斜めに配置してもよい。接合鉄筋２０の連結部２３を板面に対して斜めに配置した鉄筋コンクリート部材１ｃと、接合鉄筋２０の両側部２２を接合面３に対して斜めに配置した鉄筋コンクリート部材１ｄとを用いると、例えば切妻屋根と壁との接合構造等において、図１１（ｂ）のように鉄筋コンクリート部材１ｃ、１ｄを斜めに接合することができる。
【００６２】
次に、本発明の第２の実施の形態として、他の形状の接合鉄筋を用いた接合構造について説明する。図１２（ａ）において、２つの平板状の鉄筋コンクリート部材１、１の対向する接合面３、３から、その間隔の半分よりも長い直線状の接合鉄筋５０が垂直に突出している。
【００６３】
接合鉄筋５０の先端には図１２（ａ）に示すように、接合鉄筋５０に垂直な平板５１が設けられている。平板５１は、例えば接合鉄筋５０としてねじ節鉄筋を用いて、その先端に平板５１を螺合させて設けることができる。
あるいは例えば図１２（ｂ）に示すように、接合鉄筋５０としてねじ節鉄筋を用いて、その先端にナット５２を螺合させてもよい。ナット５２はプレートナットであることが特に好ましいが、通常のナットであってもよい。
あるいは図１２（ｃ）に示すように、接合鉄筋５０の先端を太くして節５３を設けてもよい。
各鉄筋コンクリート部材１、１の対向する接合面３、３の間には、コンクリート２が充填される。
【００６４】
両鉄筋コンクリート部材１、１間に引張力が働いた時には、接合鉄筋５０が引張荷重を受ける。するとコンクリート２は、接合鉄筋５０の先端に取り付けられたナット５２、平板５１または節５３から圧縮荷重を受ける。このように接合鉄筋５０にかかる引張荷重をコンクリート２にかかる圧縮荷重に変えることにより、強度の大きい接合構造とすることができる。
本実施の形態の接合構造によれば、ねじ節鉄筋を接合鉄筋５０とした鉄筋コンクリート部材１を作成し、接合鉄筋５０の先端にナット５２、平板５１、または節５３を設けるのみで、強度の大きい接合構造とすることができ、継手長Ｌを短くすることができる。
【００６５】
本実施の形態の鉄筋コンクリート部材１も、第１の実施の形態の鉄筋コンクリート部材１と同様に、接合鉄筋５０を保持した差し筋止め治具４１が外周に設けられ、内部に鉄筋籠４２が設置された型枠４０内にコンクリートを打ち込み、養生させることで構築することができる。
【００６６】
構築した鉄筋コンクリート部材１同士は、第１の実施の形態と同様、各鉄筋コンクリート部材１、１の接合面３、３を向かい合わせた状態で接合鉄筋５０同士を継手長Ｌで重ねあわせ、次いで各鉄筋コンクリート部材１、１を囲むように型枠４３を設け、接合面３、３、及び型枠４３に囲まれる範囲にコンクリート２を充填し、固化させることで接合することができる。
【００６７】
あるいは、小さな鉄筋コンクリート部材１同士を上述のようにして接合することにより、さらに大きな鉄筋コンクリート部材を構築してもよい。
以上のようにして構築された鉄筋コンクリート部材１を接合し、コンクリート躯体を構築することができる。
【００６８】
なお、以上の実施の形態においては、平板状の鉄筋コンクリート部材１としたが、鉄筋コンクリート部材１の形状は、箱形や管形、球面状など任意である。その他、補強鉄筋３０等の具体的な細部構造等についても適宜に変更可能であることは勿論である。
【００６９】
【発明の効果】
請求項１に記載の発明によれば、平行する直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える接合鉄筋同士に囲まれる部分に充填されたコンクリートに依存して鉄筋コンクリート間で力を伝達することができ、鉄筋コンクリートそれぞれにかかる引張荷重や圧縮荷重を受け止め、充分な強度を有する接合構造とすることができる。また、平行する直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える接合鉄筋を用いたので、ループ筋を用いた場合と同程度の重なり断面積を得るために必要な継手長を、より短くすることができる。
【００７０】
請求項２に記載の発明によれば、請求項１に記載の発明と同様の効果が得られるとともに、接合鉄筋の両側部の少なくとも一方を互いに重ね合わせるので、両側部の幅が異なる接合鉄筋同士でも鉄筋コンクリート同士を接合することができる。また、同一の継手長における重なり断面積を最大にすることができ、さらに強度の増した接合構造とすることができる。
【００７１】
請求項３に記載の発明によれば、請求項１または２に記載の発明と同様の効果が得られるとともに、接合鉄筋は２つの両側部で互いに重ね合わされているので、同一の継手長における重なり断面積を最大にすることができ、さらに強度の増した接合構造とすることができる。
【００７２】
請求項４に記載の発明によれば、請求項１に記載の発明と同様の効果が得られるとともに、接合鉄筋を少なくとも２箇所で互いに交差させる構造であるので、両側部の幅や連結部の形状が異なる接合鉄筋同士でも鉄筋コンクリート同士を接合することができる。
【００７３】
請求項５に記載の発明によれば、請求項４に記載の発明と同様の効果が得られるとともに、接合鉄筋は連結部のみで互いに交差されているので、両側部を可能な限り短くすることができ、継手長をさらに短くすることができる。
【００７４】
請求項６に記載の発明によれば、請求項２〜５のいずれか一項に記載の発明と同様の効果が得られるとともに、接合鉄筋をその互いに重ねあわされた重なり部分、またはその互いに交差された交差部分で互いに接合することにより、鉄筋コンクリート間で力を伝達することができ、各鉄筋コンクリートにかかる引張荷重や圧縮荷重をその接合部分で受け、さらに強度の増した接合構造とすることができる。
【００７５】
請求項７に記載の発明によれば、請求項１〜６のいずれか一項に記載の発明と同様の効果が得られるとともに、接合鉄筋と直交する補強鉄筋を配置することにより、さらに耐荷重の大きい接合構造とすることができる。
【００７６】
請求項８に記載の発明によれば、請求項１〜７のいずれか一項に記載の発明と同様の効果が得られるとともに、接合鉄筋と直交する補強鉄筋を配置することにより、さらに耐荷重の大きい接合構造とすることができる。
【００７７】
請求項９に記載の発明によれば、請求項７または８に記載の発明と同様の効果が得られるとともに、接合鉄筋同士に囲まれる部分に補強鉄筋が通されるので、接合鉄筋同士に囲まれる部分のコンクリートの強度を高めることができ、さらに耐荷重の大きい接合構造とすることができる。
【００７８】
請求項１０に記載の発明によれば、請求項１〜９のいずれか一項に記載の発明と同様の効果が得られるとともに、接合鉄筋を水平面、鉛直面、もしくは傾斜面に配置することにより、鉄筋コンクリートを水平方向、鉛直方向、もしくは傾斜方向に接合することができる。
【００７９】
請求項１１に記載の発明によれば、平行する直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える形状をなす接合鉄筋同士を重ね、その重なり部分にコンクリートを充填するので、接合鉄筋を介して各鉄筋コンクリートにかかる引張荷重をコンクリートにかかる圧縮荷重に変換することができ、耐荷重が大きくかつ継手長の短い接合構造を有する鉄筋コンクリート躯体を構築することができる。
【００８０】
請求項１２に記載の発明によれば、平行する直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える形状をなす接合鉄筋が側面から突出する鉄筋コンクリート部材を得ることができ、継手長を小さくした接合構造に用いることができる。
【００８１】
請求項１３に記載の発明によれば、平行な直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える形状をなす接合鉄筋が側面から突出する鉄筋コンクリートを製造し、次いでその接合鉄筋が突出する側面同士を対向させ、接合鉄筋同士を重ね合わせた状態で鉄筋コンクリートを型枠内に並べ、側面及び型枠に囲まれる範囲にコンクリートを打設することで、小さな鉄筋コンクリート部材が連続した、より大きな鉄筋コンクリート部材を製造することができる。
【００８２】
請求項１４に記載の発明によれば、平行な直線状の両側部と、これら両側部から角部または折り曲げ部を介して直線部または曲線部が連続する連結部とを備える形状をなす接合鉄筋を側面に保持した鉄筋コンクリートを製造し、次いで鉄筋コンクリート同士を接合するので、短い継手長で鉄筋コンクリート同士を接合することができる。
【００８３】
請求項１５に記載の発明によれば、各鉄筋コンクリートにかかる引張荷重を、接合鉄筋を介して平板、ナット、または節のいずれかによりコンクリートにかかる圧縮荷重に変換するので、棒状の接合鉄筋を用いた場合よりも短い継手長で充分な強度を有する接合構造とすることができる。
【００８４】
請求項１６に記載の発明によれば、直線状の棒状部の先端に平板、ナット、または節のいずれかが設けられた接合鉄筋同士を重ね、その重なり部分にコンクリートを充填するので、接合鉄筋を介して各鉄筋コンクリートにかかる引張荷重をコンクリートにかかる圧縮荷重に変換することができ、耐荷重が大きくかつ継手長の短い接合構造を有する鉄筋コンクリート躯体を構築することができる。
【００８５】
請求項１７に記載の発明によれば、直線状の棒状部の先端に平板、ナット、または節のいずれかが設けられた接合鉄筋が側面から突出する鉄筋コンクリートを得ることができ、継手長を小さくした接合構造に用いることができる。
【００８６】
請求項１８に記載の発明によれば、直線状の棒状部の先端に平板、ナット、または節のいずれかが設けられた接合鉄筋が側面から突出する鉄筋コンクリートを製造し、次いでその接合鉄筋が突出する側面同士を対向させ、接合鉄筋同士を重ね合わせた状態で鉄筋コンクリートを型枠内に並べ、側面及び型枠に囲まれる範囲にコンクリートを打設することで、小さな鉄筋コンクリートが連続した、より大きな鉄筋コンクリートを製造することができる。
【００８７】
請求項１９に記載の発明によれば、直線状の棒状部の先端に平板、ナット、または節のいずれかが設けられた接合鉄筋を側面に保持した鉄筋コンクリートを製造し、次いで鉄筋コンクリート同士を接合するので、短い継手長で鉄筋コンクリート同士を接合することができる。
【図面の簡単な説明】
【図１】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図、（ｃ）は他の形態例を示す垂直断面図である。
【図２】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す図であり、（ａ）、（ｂ）、（ｃ）は垂直断面図、（ｄ）は（ａ）〜（ｃ）のいずれかの平面図である。
【図３】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【図４】本発明の鉄筋コンクリートの製造方法に用いる型枠の形態例を示す図であり、（ａ）は平面図、（ｂ）は要部の垂直断面図である。
【図５】本発明の鉄筋コンクリートの接合方法の実施の形態例を示す図であり、（ａ）は平面図、（ｂ）は立面図である。
【図６】本発明の鉄筋コンクリートの製造方法に用いる型枠の形態例を示す図であり、（ａ）は平面図、（ｂ）は立面図である。
【図７】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す図であり、（ａ）は水平断面図、（ｂ）は立面図である。
【図８】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す垂直断面図である。
【図９】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す垂直断面図である。
【図１０】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【図１１】（ａ）は本発明に用いる鉄筋コンクリートの接合面の形態例を示す図であり、（ｂ）は（ａ）の鉄筋コンクリートの使用例を示す立面図である。
【図１２】本発明の鉄筋コンクリートの接合構造の実施の形態例を示す平面図であり、（ａ）は接合鉄筋の先端にナットを設けた図、（ｂ）は平板を設けた図、（ｃ）は節を設けた図である。
【図１３】従来の鉄筋コンクリートの接合構造を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【図１４】従来の鉄筋コンクリートの接合構造を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【図１５】従来の鉄筋コンクリートの接合構造を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【図１６】従来の鉄筋コンクリートの接合構造を示す図であり、（ａ）は垂直断面図、（ｂ）は平面図である。
【符号の説明】
１、１ａ、１ｂ、１ｃ、１ｄ、６１鉄筋コンクリート部材
２、６２コンクリート
３、６３接合面
２０、５０、６４接合鉄筋
２１折り曲げ部
２２両側部
２３連結部
２４角部
３０補強鉄筋
４０、４３、４４型枠
４１差し筋止め治具
４２鉄筋籠
５１平板
５２ナット
５３節
６５、６７添え筋
６６ループ鉄筋[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of reinforced concrete such as cast-in-place concrete and precast concrete, a method for producing reinforced concrete, and a method for joining reinforced concrete.
[0002]
[Prior art]
As a conventional joining structure between reinforced concrete, for example, as shown in FIG. 13, rod-like joining reinforcing bars 64 protruding from the joining surface 63 of each reinforced concrete member 61, 61 are overlapped, and concrete is provided between the reinforced concrete members 61, 61. There are those that fill 62. Alternatively, as shown in FIG. 14, there is a type in which a bar-shaped supplementary bar 65 is superimposed on a jointed reinforcing bar 64 and concrete 62 is filled between the reinforced concrete members 61 and 61.
[0003]
In addition, for the purpose of preventing dropout or the like, as shown in FIG. 15, there is a type in which loop reinforcing bars 66 protruding from the joint surface 63 of each reinforced concrete member 61 are overlapped and filled with concrete 62 and joined. Alternatively, as shown in FIG. 16, there is one in which an annular accessory bar 67 is overlapped between the loop reinforcing bars 66 and 66 and concrete 62 is filled and joined. Further, there is a type in which a reinforcing reinforcing bar (not shown) is passed through an overlapping portion of the loop reinforcing bar 66 and the supplementary reinforcing bar 67, and the concrete 62 is filled and joined (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2002-227130 A
[0005]
[Problems to be solved by the invention]
However, in the method in which the joining reinforcing bars and loop reinforcing bars are used in an overlapping manner, the length of the overlapping portion (joint length L) needs to be sufficiently long in order to maintain the strength between the reinforced concrete members. Further, the method of superimposing accessory bars has a problem that the joint becomes longer by that amount.
[0006]
When the loop reinforcing bars are overlapped, the tensile load applied between the reinforced concrete members can be converted into a compressive load applied to the concrete in the overlapping portion of the loop reinforcing bars. However, since the compressive strength is based on the adhesive strength of the concrete to the loop reinforcing bar, it depends on the length of the reinforcing bars in the overlapping part, and although it is shorter than the rod-shaped joining reinforcing bars, the joint length L must still be made sufficiently long. It was.
[0007]
An object of the present invention is to provide a joint structure of reinforced concrete having a shorter joint length.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention described in claim 1 of the present invention includes, as shown in, for example, FIG. 1, joint reinforcing bars 20, 20 protruding from the joint surfaces of opposing reinforced concrete (reinforced concrete members 1, 1). In the structure in which the concrete 2 is cast and joined in a state where they are partially overlapped with each other, the joining rebar 20 includes parallel straight side portions 22 and corners 24 or bent portions 21 from the side portions 22. And a connecting portion 23 in which a straight line portion or a curved portion continues, and concrete 2 is placed in a portion surrounded by both side portions 22 and the connecting portion 23.
[0009]
According to the first aspect of the present invention, the linear linear side portions 22 that are parallel to each other, and the connecting portion 23 in which the linear portion or the curved portion continues from the both side portions 22 via the corner portions 24 or the bent portions 21 are provided. Force can be transmitted between the reinforced concrete 1 and 1 depending on the concrete 2 filled in the portion surrounded by the jointed reinforcing bars 20 and 20, and the tensile load and the compressive load applied to each of the reinforced concrete 1 and 1 can be received. It can be set as the joining structure which has the intensity | strength. Moreover, since the joining rebar 20 provided with the parallel linear both side parts 22 and the connection part 23 in which a linear part or a curve part continues from these both side parts 22 via the corner | angular part 24 or the bending part 21, loop is used. The joint length L required to obtain the same overlapping cross-sectional area as that when using a streak can be made shorter.
[0010]
The invention according to claim 2 is the reinforced concrete joint structure according to claim 1, wherein at least one of the side portions 22, 22 of the joint reinforcing bar 20 is overlapped with each other as shown in FIG. It is characterized by being.
[0011]
According to the second aspect of the present invention, since at least one of the both side portions 22 and 22 of the joint reinforcing bar 20 is overlapped with each other, the reinforced concretes 1 can be joined to each other even between the joint reinforcing bars 20 having different widths of the both side portions 22 and 22. Can do. Moreover, the overlapping cross-sectional area S in the same joint length L can be maximized, and a joining structure with further increased strength can be obtained.
[0012]
The invention according to claim 3 is the reinforced concrete joint structure according to claim 1 or 2, wherein, for example, as shown in FIG. 2 (a), the joint rebar 20 is overlapped with each other at two side portions 22,22. It is characterized by.
[0013]
According to the invention described in claim 3, since the joint reinforcing bars 20 are overlapped with each other at the two side portions 22, 22, the overlapping cross-sectional area S at the same joint length L can be maximized, and the strength can be further increased. It can be set as the joining structure which increased.
[0014]
The invention according to claim 4 is characterized in that, in the joint structure of reinforced concrete according to claim 1, for example, as shown in FIG. 2 (c), the joint reinforcing bars 20 intersect each other in at least two places. To do.
[0015]
According to invention of Claim 4, since it is the structure which mutually crosses joining rebar 20 in at least two places, even between joining rebar 20 where the width of both sides 22, 22 and the shape of connecting part 23 differ, reinforced concrete 1, One can be joined.
[0016]
According to a fifth aspect of the present invention, in the reinforced concrete joint structure according to the fourth aspect, as shown in FIG. 3, for example, the joint reinforcing bars 20, 20 do not overlap at both side portions 22, 22, and the connecting portion 23. Only crossing each other.
[0017]
According to the fifth aspect of the present invention, since the joining reinforcing bars 20 and 20 do not overlap with each other at the side portions 22 and 22 but intersect each other only at the connecting portion 23, the side portions 22 and 22 are made as short as possible. The joint length L can be further shortened.
[0018]
The invention according to claim 6 is the joint structure of reinforced concrete according to any one of claims 2 to 5, wherein the joint reinforcing bar 20 is an overlapped part thereof overlapped with each other or an intersection part intersected with each other. It is characterized by being joined together.
[0019]
According to the invention described in claim 6, force is transmitted between the reinforced concretes 1 and 1 by joining the jointed reinforcing bars 20 and 20 to each other at the overlapping part or the intersecting part where they are overlapped with each other. Therefore, a tensile load or a compressive load applied to each reinforced concrete 1 is received at the joint portion, and a joint structure with further increased strength can be obtained.
[0020]
The invention according to claim 7 is the joint structure of reinforced concrete according to any one of claims 1 to 6, wherein the corner portion 24, the bent portion 21, or the connecting portion 23 is orthogonal to the joint reinforcing bar 20. The reinforcing reinforcing bar 30 is arranged.
[0021]
According to an eighth aspect of the present invention, in the reinforced concrete joint structure according to any one of the first to seventh aspects, reinforcing reinforcing bars 30 orthogonal to the jointed reinforcing bars 20 are arranged on the both side portions 22 and 22. It is characterized by that.
[0022]
According to invention of Claim 7 or 8, it can be set as the joining structure with a still larger load proof by arrange | positioning the reinforcing reinforcing bar 30 orthogonal to the joining reinforcing bar 20. FIG.
[0023]
The invention according to claim 9 is characterized in that, in the joint structure of reinforced concrete according to claim 7 or 8, the reinforcing reinforcing bar 30 is passed through a portion surrounded by the joining reinforcing bars 20, 20.
[0024]
According to the invention described in claim 9, since the reinforcing reinforcing bars 30 are passed through the portions surrounded by the joint reinforcing bars 20, the strength of the concrete 2 in the portion surrounded by the joint reinforcing bars 20, 20 can be increased. Furthermore, it can be set as the joining structure with a large load resistance.
[0025]
A tenth aspect of the present invention is the reinforced concrete joint structure according to any one of the first to ninth aspects, wherein the joint reinforcing bar 20 is disposed on a horizontal plane, a vertical plane, or an inclined plane. .
[0026]
According to the invention described in claim 10, the reinforced concrete 1 can be joined in the horizontal direction, the vertical direction, or the inclined direction by arranging the joining reinforcing bars 20 on a horizontal plane, a vertical plane, or an inclined plane.
[0027]
The invention according to claim 11 is a method for constructing a reinforced concrete frame, wherein the straight side portions 22 and 22 are parallel to each other and the side portions 22 and 22 are connected to the straight portion or the bent portion 21 via the corner portion 24 or the bent portion 21. The precast concrete members 1 and 1 in which the joining rebars 20 having a shape including the connecting portion 23 having the curved portion are arranged from each other are arranged side by side, and the joining rebars 20 and 20 are overlapped with each other. It is characterized in that concrete 2 is filled in between and solidified.
[0028]
According to the invention described in claim 11, the parallel straight side portions 22, 22, and the connecting portion in which the straight portion or the curved portion continues from the both side portions 22, 22 via the corner portion 24 or the bent portion 21. 23, the overlapping reinforcing bars 20, 20 are overlapped with each other, and the overlapping portion is filled with the concrete 2, so that the tensile load applied to each reinforced concrete 1, 1 through the bonding reinforcing bar 20 is changed to the compressive load applied to the concrete 2. It is possible to construct a reinforced concrete frame having a joint structure that can be converted and has a large load resistance and a short joint length.
[0029]
The invention according to claim 12 is a method for constructing reinforced concrete, for example, as shown in FIG. 4, parallel straight side portions 22, 22, and both side portions 22, 22 to corner portions 24, 24 or A rebar bar 42 is installed in the mold 40 holding the joint rebar 20 having a shape including a straight line portion or a connecting portion 23 in which a curved portion is continuous via the bent portions 21, 21, It is characterized by placing concrete 2.
[0030]
According to the twelfth aspect of the present invention, the straight linear portion or the curved portion is formed through the parallel straight side portions 22 and 22 and the both side portions 22 and 22 through the corner portions 24 and 24 or the bent portions 21 and 21. Reinforced concrete in which the joining rebar 20 having a shape including the continuous connecting portion 23 protrudes from the side surface (joining surface 3) can be obtained, and can be used for a joining structure in which the joint length L is reduced.
[0031]
The invention according to claim 13 is a method for constructing reinforced concrete, and includes parallel straight side portions 22, 22 and both side portions 22, 22 through corner portions 24, 24 or bent portions 21, 21. A reinforcing bar 42 is installed in a mold 43 holding a jointed reinforcing bar 20 having a shape including a connecting part 23 having a straight line or a curved part, and a concrete 2 is placed in the mold 43 to reinforce the concrete. 1, and then the side surfaces from which the joint rebars 20 protrude are opposed to each other, and the reinforced concrete 1 is arranged in the mold 43 in a state where the joint rebars 20 are overlapped with each other. Concrete 2 is placed in a range surrounded by
[0032]
According to the thirteenth aspect of the present invention, the parallel straight side portions 22, 22 and the straight portions or curved portions from the both side portions 22, 22 via the corner portions 24, 24 or the bent portions 21, 21 are provided. The reinforced concrete 1 in which the joining rebar 20 having a shape including the continuous connecting portion 23 protrudes from the side surface is manufactured, and then the side surfaces 3 and 3 from which the joining rebar 20 protrudes are opposed to each other, and the joining rebars 20 and 20 are overlapped. By arranging the reinforced concrete 1 and 1 in the mold 43 in the combined state and placing the concrete in a range surrounded by the side surfaces 3 and 3 and the mold 43, a larger reinforced concrete in which the small reinforced concrete 1 and 1 are continuous is formed. Can be manufactured.
[0033]
The invention according to claim 14 is a method for joining reinforced concrete, wherein both parallel straight side portions 22 and 22 and both side portions 22 and 22 are connected to corner portions 24 and 24 or bent portions 21 and 21. Reinforcing rods 42 are installed in a mold 40 holding a jointed reinforcing bar 20 having a shape including a connecting part 23 in which a straight line part or a curved part continues, and a concrete is placed in the mold 40 to reinforce the reinforced concrete 1. 1, and then the reinforced concrete 1, 1 are arranged in a mold 43 with the protruding side surfaces 3, 3 of the joint reinforcing bars 20, 20 facing each other, and the opposed side surfaces 3, 3 and the mold frame are arranged. Concrete is cast in a range surrounded by 43.
[0034]
According to the fourteenth aspect of the present invention, the straight linear portion or the curved portion is formed through the parallel straight side portions 22 and 22 and the both side portions 22 and 22 through the corner portions 24 and 24 or the bent portions 21 and 21. Since the reinforced concrete 1 which hold | maintained the joining reinforcement 20 which makes the shape provided with the continuous connection part 23 on the side surface 3 is manufactured, and then the reinforced concrete 1 is joined, the reinforced concrete 1 can be joined with a short joint length.
[0035]
The invention according to claim 15 is a joint in which the concrete 2 is placed and joined in a state where the joint rebars 50, 50 protruding from the joint surfaces 3, 3 of the opposing reinforced concrete 1, 1 are partially overlapped with each other. In the structure, for example, as shown in FIG. 12, the joining reinforcing bar 50 is characterized in that any one of a flat plate 51, a nut 52, and a node 53 is provided at the tip of a linear bar-shaped portion.
[0036]
According to the invention described in claim 15, the tensile load applied to each reinforced concrete 1 is converted into a compressive load applied to the concrete 2 by any one of the flat plate 51, the nut 52, and the node 53 via the joining rebar 50. A joint structure having sufficient strength with a joint length L shorter than that in the case of using a rod-like joint reinforcing bar can be obtained.
[0037]
The invention according to claim 16 is a method for constructing a reinforced concrete frame, wherein the jointed reinforcing bars 50, 50 each provided with any one of the flat plate 51, the nut 52, and the node 53 at the end of the linear bar-like portion are viewed from the side. The protruding precast concrete members 1 are arranged, and the precast concrete members 1 and 1 are filled with concrete and solidified in a state where the joint reinforcing bars 50 are overlapped.
[0038]
According to the sixteenth aspect of the present invention, the joining rebars 50 and 50 each provided with any one of the flat plate 51, the nut 52, and the node 53 are overlapped at the end of the linear bar-shaped portion, and the concrete 2 is overlapped on the overlapping portion. Therefore, the tensile load applied to each reinforced concrete 1 and 1 can be converted into the compressive load applied to the concrete 2 through the joint rebar 50, and the reinforced concrete frame having a joint structure having a large load resistance and a short joint length can be obtained. Can be built.
[0039]
The invention according to claim 17 is a method for constructing reinforced concrete, in which a jointed reinforcing bar 50 in which any one of a flat plate 51, a nut 52, and a node 53 is provided at the end of a straight bar-like portion is held on a side surface. A reinforcing bar 42 is installed in the frame 40 and concrete is placed in the mold 40.
[0040]
According to the invention described in claim 17, the reinforced concrete 1 in which the joining reinforcing bar 50 provided with any one of the flat plate 51, the nut 52, and the node 53 at the tip of the linear bar-like portion protrudes from the side surface (joining surface 3). And can be used for a joint structure with a reduced joint length L.
[0041]
The invention according to claim 18 is a method for constructing a reinforced concrete, in which a jointed reinforcing bar 50 in which any of a flat plate 51, a nut 52, or a node 53 is provided at the end of a linear bar-like part is held on a side surface. A reinforcing bar 42 is installed in the frame 40, concrete is placed in the mold 40 to produce the reinforced concrete 1, and then the side surfaces 3 from which the joining reinforcing bars 50 protrude are opposed to each other, and the joining reinforcing bars 50 are overlapped. In the combined state, the reinforced concretes 1 and 1 are arranged in a mold 43, and the concrete is placed in a range surrounded by the opposing side surfaces 3 and 3 and the mold 43.
[0042]
According to the invention described in claim 18, the reinforced concrete 1 is produced in which the joint reinforcing bar 50 provided with any one of the flat plate 51, the nut 52, and the node 53 at the tip of the linear bar-like portion protrudes from the side surface, and then A range in which the side surfaces 3 and 3 from which the joint reinforcing bars 50 protrude are opposed to each other, the reinforced concretes 1 and 1 are arranged in the mold frame 43 in a state where the joint reinforcing bars 50 are overlapped, and are surrounded by the side surfaces 3 and 3 and the mold frame 43. By placing concrete on the surface, a larger reinforced concrete in which small reinforced concretes 1 and 1 are continuous can be manufactured.
[0043]
The invention according to claim 19 is a method for joining reinforced concrete, in which a joining bar 50 in which any one of a flat plate 51, a nut 52, and a node 53 is provided at the end of a straight bar-like portion is held on a side surface. A reinforcing bar 42 is installed in the frame 40, concrete is placed in the mold 40 to manufacture the reinforced concrete 1, and then the reinforced concrete 1 is faced with the side surfaces 3, 3 from which the joining reinforcing bars 50 protrude. It is characterized in that concrete is placed in a range surrounded by the side surfaces 3 and 3 and the mold frame 43 arranged in the mold frame 43 and opposed to each other.
[0044]
According to the invention described in claim 19, the reinforced concrete 1 is manufactured in which the joint reinforcing bar 50 in which any of the flat plate 51, the nut 52, or the node 53 is provided at the tip of the linear bar-like part is held on the side surface 3, Subsequently, since the reinforced concretes 1 are joined together, the reinforced concretes 1 can be joined together with a short joint length.
[0045]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention will be described in detail below. FIG. 1 is a view showing a joining structure of two flat reinforced concrete members 1. Examples of the reinforced concrete member 1 include those used for building floor boards, wall boards, roof boards, etc., and those used for bridge girders, harbors / marine structures, underground structures, and the like.
[0046]
The joining reinforcing bars 20 protrude vertically from the opposing joining surfaces 3 and 3 of the reinforced concrete members 1 and 1, and the concrete 2 is filled between the joining surfaces 3 and 3.
The joint reinforcing bar 20 has a shape including parallel straight side portions 22, 22, and a connecting portion 23 from the both side portions 22, 22 through a bent portion 21. As the joining reinforcing bar 20, a dowel reinforcing bar or the like can be used.
[0047]
The bent portion 21 is a portion where a bar-shaped reinforcing bar is bent, and both side portions 22 and 22 are parallel to each other. In addition, it is preferable that the locality radius r of the bending part 21 is less than 1/2 of the space | interval d of both sides. When the radius of curvature r is 0, the bent portion 21 becomes a corner portion 24 as shown in FIG.
As shown in FIG. 1, the ends of the side portions 22, 22 opposite to the bent portions 21, 21 are embedded in the reinforced concrete member 1.
The connecting portion 23 communicates between the two bent portions 21, 21, and transmits the tensile load applied to the joint rebar 20 to the concrete 2. The connecting portion 23 may be linear, or may be a curved shape such as a spiral shape or a bent shape.
[0048]
The joining reinforcing bars 20 and 20 of the two reinforced concrete members 1 and 1 are arranged so as to intersect each other at two places, and the concrete 2 is filled so as to close the gap between the joining reinforcing bars 20 and 20. By filling the concrete 2 in this manner, the force can be transmitted between the reinforced concrete members 1 and 1 depending on the concrete 2. When a tensile force is applied between both reinforced concrete members 1, 1, a portion of concrete 2 surrounded by both joint reinforcing bars 20, 20 receives a compressive load from the bent portion 21 and the connecting portion 23 inward. Thus, by changing the tensile load applied between the reinforced concrete members 1 and 1 to the compressive load applied to the concrete 2, a joining structure having sufficient strength can be obtained.
[0049]
Furthermore, in the joining structure of the present invention, since the U-shaped bar having two bent portions 21 and 21 is used as the joining bar 20, it is necessary to obtain an overlapping cross-sectional area of the same level as when using a loop bar. The simple joint length L can be made shorter than when a loop line is used.
[0050]
Moreover, the overlapped joining reinforcing bars 20 may be joined by welding or bundling with a steel wire or the like. In addition, as shown to Fig.2 (a), you may arrange | position so that both sides 22 may mutually overlap. When the both side portions 22 are joined to each other, a tensile load or a compressive load can be transmitted by the joined portion, and the strength can be further increased.
[0051]
Or as shown in FIG. 3, you may arrange | position so that the two bending parts 21 and 21 may mutually overlap. In the case of overlapping at the bent portion 21, both side portions 22 can be shortened as much as possible, and the joint length L can be further shortened.
[0052]
When the widths of the joining reinforcing bars 20 are different, for example, as shown in FIG. 2 (b), either one of the two side portions 22 may overlap each other and be arranged so as to intersect at one other place. For example, as shown in FIG.2 (c), you may arrange | position so that it may cross | intersect at two places. You may weld and join the crossing part of joining rebars 20 by bundling with a steel wire.
[0053]
Note that the reinforcing bars 30 may be provided on the bent part 21, the both side parts 22, and the connecting part 23 by welding or bundling them perpendicularly to the joint reinforcing bars 20. By providing the reinforcing reinforcing bars 30, it is possible to obtain a stronger joint structure.
The reinforcing reinforcing bars 30 may be provided outside the part surrounded by the joining reinforcing bars 20 or may be passed through the part surrounded by the joining reinforcing bars 20. When the reinforcing reinforcing bar 30 is passed through the part surrounded by the joining reinforcing bars 20, the strength of the concrete 2 in the part surrounded by the joining reinforcing bars 20 can be increased, and a joining structure having a large load resistance can be obtained. .
[0054]
Next, the construction method of the reinforced concrete member 1 will be described. First, as shown in FIG. 4, a reinforcing bar 42 is installed in the mold 40. On the outer periphery of the mold 40, a bracing jig 41 is provided. The insertion bar stopping jig 41 holds the joint reinforcing bar 20. The joint reinforcing bar 20 penetrates the mold 40 at both side portions 22, and the bent portion 21 and the connecting portion 23 are directed to the outside of the mold frame 40, and both ends of the both side portions 22 are directed to the inside of the mold frame 40. The joining reinforcing bar 20 is joined to the reinforcing bar 42 by placing concrete in the mold 40, but may be joined by welding or binding in advance.
Next, concrete is poured into the mold 40 and cured. Once the concrete has solidified to a sufficient demolding strength, the mold 40 is removed. The construction of the reinforced concrete member 1 may be performed on site or in a factory.
[0055]
Next, a method for joining the constructed reinforced concrete members 1 will be described. First, as shown in FIG. 5, the joint surfaces 3 of the above-mentioned reinforced concrete members 1 face each other, and the joint reinforcing bars 20 are overlapped with each other with a joint length L. Further, the reinforcing reinforcing bars 30 are welded or bound to the connecting reinforcing bars 20 as necessary.
[0056]
A mold 43 is provided so as to surround each reinforced concrete member 1, 1, and concrete 2 is filled in a portion surrounded by the joining surfaces 3, 3 of each reinforced concrete member 1, 1 and the mold 43. At this time, the concrete 2 is made to spread between the joining reinforcing bars 20 and the reinforcing reinforcing bars 30.
When the concrete 2 has solidified to a sufficient demolding strength, the mold 43 is removed. As described above, the reinforced concrete members 1 can be joined to each other.
[0057]
Alternatively, a larger reinforced concrete member may be constructed by joining small reinforced concrete members 1 as described above. For example, as shown in FIG. 6, a mold frame 44 is further provided in the mold frame 43, which is provided with an incision bar holding jig 41 that holds the joining rebar 20. First, concrete is placed in a portion surrounded by the mold frame 43 and the mold frame 44 to manufacture the reinforced concrete members 1 and 1. Thereafter, the mold 44 may be removed, and concrete may be placed in a portion surrounded by the joint surface 3 of the reinforced concrete members 1 and 1 and the mold 43 to form a larger reinforced concrete member.
Note that prestress may be introduced into the bonded reinforcing bar 20 or the reinforcing bar 42.
[0058]
As described above, the reinforced concrete member 1 can be joined to construct a concrete frame. According to the joint structure of the present embodiment, the cross-sectional area S of the overlapped concrete 2 can be sufficiently secured with a joint length L shorter than when the loop reinforcing bars are overlapped.
In the above example, two flat reinforced concrete members 1 are arranged side by side and joined. However, for example, as shown in FIG. 7, two reinforced concrete members 1 and 1 may be arranged vertically and joined. In that case, as shown in FIG. 7, you may join both the side parts 22 and the connection part 23 of each joining reinforcing bar 20 by welding or binding.
[0059]
In addition, in FIGS. 1 to 7, the connecting portion 23 is parallel to the joint surface 3, but in a joint structure of a portion that is not mechanically uniform, such as a floor overhang or a gable roof, as shown in FIG. 8. Further, it may be inclined with respect to the joint surface 3. Moreover, a bending part may be further provided in the connection part 23, for example, as shown in FIG. 9, you may provide a bending part arbitrarily according to the joining angle of the two reinforced concrete members 1a and 1b.
[0060]
Further, the angles of the side portions 22 and the connecting portion 23 with respect to the joint surface 3 and the plate surface can be changed as appropriate. For example, in FIG. 1-8, the connection part 23 of the joining reinforcing bar 20 is arrange | positioned perpendicularly | vertically with the board surface of the reinforced concrete member 1, but as shown in FIG. Also in that case, similarly, the joining reinforcing bars 20 can be joined to each other by welding or binding at both side portions 22 or the bent portions 21.
[0061]
Moreover, as shown to Fig.11 (a), you may arrange | position the connection part 23 of the joining reinforcement 20 diagonally with respect to a plate surface. When the reinforced concrete member 1c in which the connecting portion 23 of the joint reinforcing bar 20 is disposed obliquely with respect to the plate surface and the reinforced concrete member 1d in which the both side portions 22 of the joint reinforcing bar 20 are disposed obliquely with respect to the joint surface 3 are used, for example, gable In the joint structure between the roof and the wall, the reinforced concrete members 1c and 1d can be joined obliquely as shown in FIG.
[0062]
Next, as a second embodiment of the present invention, a joint structure using joint bars having other shapes will be described. In FIG. 12 (a), linear joining reinforcing bars 50 longer than half of the interval project vertically from the opposing joining surfaces 3, 3 of two flat reinforced concrete members 1, 1.
[0063]
As shown in FIG. 12A, a flat plate 51 perpendicular to the joining rebar 50 is provided at the tip of the joining rebar 50. The flat plate 51 can be provided, for example, by using a screw node reinforcing bar as the joining reinforcing bar 50 and screwing the flat plate 51 to the tip thereof.
Alternatively, for example, as shown in FIG. 12B, a screw rebar may be used as the joining rebar 50 and a nut 52 may be screwed to the tip thereof. The nut 52 is particularly preferably a plate nut, but may be a normal nut.
Or as shown in FIG.12 (c), you may provide the node 53 by making the front-end | tip of the joining reinforcing bar 50 thick.
Concrete 2 is filled between the facing joint surfaces 3 and 3 of the reinforced concrete members 1 and 1.
[0064]
When a tensile force is applied between the two reinforced concrete members 1 and 1, the joining rebar 50 receives a tensile load. Then, the concrete 2 receives a compressive load from the nut 52, the flat plate 51, or the node 53 attached to the tip of the joining rebar 50. In this way, by changing the tensile load applied to the bonded rebar 50 to the compressive load applied to the concrete 2, a bonded structure having a high strength can be obtained.
According to the joining structure of the present embodiment, the reinforced concrete member 1 having the threaded reinforcing bar 50 as the joining reinforcing bar 50 is created, and the nut 52, the flat plate 51, or the node 53 is provided at the tip of the joining reinforcing bar 50, and the strength is high. A joint structure can be obtained, and the joint length L can be shortened.
[0065]
Similarly to the reinforced concrete member 1 of the first embodiment, the reinforced concrete member 1 of the present embodiment is also provided with an insertion bar stopping jig 41 that holds the joining reinforcing bar 50 on the outer periphery, and a reinforcing bar 42 is installed inside. It can be constructed by placing concrete in the mold 40 and curing it.
[0066]
As in the first embodiment, the constructed reinforced concrete members 1 are overlapped with the joint length L with the joint length L in a state where the joint surfaces 3 and 3 of the reinforced concrete members 1 and 1 face each other, and then each reinforced concrete. The mold 43 can be provided so as to surround the members 1, 1, and the concrete 2 can be filled in the range surrounded by the joint surfaces 3, 3 and the mold 43 and solidified to be joined.
[0067]
Alternatively, a larger reinforced concrete member may be constructed by joining small reinforced concrete members 1 as described above.
The reinforced concrete member 1 constructed as described above can be joined to construct a concrete frame.
[0068]
In addition, in the above embodiment, it was set as the flat reinforced concrete member 1, However, The shape of the reinforced concrete member 1 is arbitrary, such as a box shape, a pipe shape, and a spherical shape. In addition, it is needless to say that specific details such as the reinforcing steel bars 30 can be changed as appropriate.
[0069]
【The invention's effect】
According to the first aspect of the present invention, the jointed reinforcing bars are provided with parallel straight side portions and a connecting portion in which the straight portion or the curved portion continues from the both sides via a corner portion or a bent portion. Depending on the concrete filled in the portion, the force can be transmitted between the reinforced concretes, and the tensile load and the compressive load applied to each of the reinforced concretes can be received and a joining structure having sufficient strength can be obtained. In addition, since a jointed reinforcing bar having parallel straight side portions and a connecting portion in which a straight portion or a curved portion continues from both side portions via a corner portion or a bent portion is used, and when a loop wire is used The joint length required to obtain the same overlap cross-sectional area can be further shortened.
[0070]
According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and at least one of the two side portions of the joint reinforcing bar is overlapped with each other. But reinforced concrete can be joined together. Moreover, the overlap cross-sectional area in the same joint length can be maximized, and a joining structure with further increased strength can be obtained.
[0071]
According to the invention of the third aspect, the same effect as that of the invention of the first or second aspect can be obtained, and the joining reinforcing bars are overlapped with each other at the two side portions, so that the overlap at the same joint length is achieved. The cross-sectional area can be maximized, and a joint structure with further increased strength can be obtained.
[0072]
According to the invention described in claim 4, the same effect as that of the invention described in claim 1 can be obtained, and the joining reinforcing bars intersect with each other at least at two locations. Reinforced concrete can be joined even with jointed reinforcing bars having different shapes.
[0073]
According to the invention described in claim 5, the same effect as that of the invention described in claim 4 can be obtained, and the joint reinforcing bars intersect with each other only at the connecting portion, so that both sides are made as short as possible. The joint length can be further shortened.
[0074]
According to the invention described in claim 6, the same effect as in the invention described in any one of claims 2 to 5 can be obtained, and the joining reinforcing bars are overlapped with each other, or the intersections thereof are intersected. By joining each other at the intersecting portion, the force can be transmitted between the reinforced concrete, and the tensile load and the compressive load applied to each reinforced concrete can be received at the joined portion, and a joint structure with further increased strength can be obtained. .
[0075]
According to the invention described in claim 7, the same effects as those of the invention described in any one of claims 1 to 6 can be obtained, and the load-bearing capacity can be further increased by arranging the reinforcing reinforcing bars orthogonal to the joining reinforcing bars. A large joining structure can be obtained.
[0076]
According to the invention described in claim 8, the same effects as those of the invention described in any one of claims 1 to 7 can be obtained, and the load-bearing capacity can be further increased by arranging the reinforcing reinforcing bars orthogonal to the joining reinforcing bars. A large joining structure can be obtained.
[0077]
According to the ninth aspect of the invention, the same effect as that of the seventh or eighth aspect of the invention can be obtained, and the reinforcing reinforcing bars are passed through the portion surrounded by the connecting reinforcing bars. This can increase the strength of the concrete in the portion to be bonded, and can also provide a joint structure with a large load resistance.
[0078]
According to the invention described in claim 10, the same effect as that of the invention described in any one of claims 1 to 9 can be obtained, and the joining reinforcing bars are arranged on a horizontal plane, a vertical plane, or an inclined plane. The reinforced concrete can be joined in the horizontal direction, the vertical direction, or the inclined direction.
[0079]
According to the eleventh aspect of the present invention, the bonded reinforcing bar has a shape including both parallel straight side portions and a connecting portion in which the straight portion or the curved portion is continuous from the both sides via the corner portion or the bent portion. By overlapping each other and filling the overlapping part with concrete, the tensile load applied to each reinforced concrete can be converted to the compressive load applied to the concrete via the joint rebar, and the joint structure with a large load resistance and a short joint length can be obtained. A reinforced concrete frame can be constructed.
[0080]
According to the twelfth aspect of the present invention, there is provided a bonded reinforcing bar having a shape including parallel straight side portions and a connecting portion in which a straight portion or a curved portion is continuous from both sides via a corner portion or a bent portion. Can be obtained for a reinforced concrete member protruding from the side surface, and can be used for a joint structure with a reduced joint length.
[0081]
According to the invention described in claim 13, a jointed reinforcing bar having a shape including parallel straight side portions, and a connecting portion in which a straight portion or a curved portion continues from both sides via a corner portion or a bent portion. Manufactures reinforced concrete that protrudes from the side, then aligns the reinforced concrete in the formwork with the jointed rebars facing each other, with the jointed rebars overlapped, and within the range surrounded by the side and formwork By placing the, a larger reinforced concrete member in which small reinforced concrete members are continuous can be manufactured.
[0082]
According to the fourteenth aspect of the present invention, there is provided a bonded reinforcing bar having a shape including parallel straight side portions and a connecting portion in which the straight portion or the curved portion continues from the both sides via a corner portion or a bent portion. Since the reinforced concrete which manufactured the side surface is manufactured and then reinforced concrete is joined, reinforced concrete can be joined with a short joint length.
[0083]
According to the invention described in claim 15, since the tensile load applied to each reinforced concrete is converted to the compressive load applied to the concrete by any one of a flat plate, a nut, or a node via the bonded rebar, the rod-shaped bonded rebar is used. It is possible to obtain a joint structure having a sufficient strength with a joint length shorter than that in the case of the above.
[0084]
According to the sixteenth aspect of the present invention, the joining bars provided with either flat plates, nuts, or nodes are overlapped at the ends of the linear bar-shaped portions, and the overlapping portions are filled with concrete. Thus, the tensile load applied to each reinforced concrete can be converted into a compressive load applied to the concrete, and a reinforced concrete frame having a joint structure having a large load resistance and a short joint length can be constructed.
[0085]
According to the seventeenth aspect of the present invention, it is possible to obtain a reinforced concrete in which a joint reinforcing bar provided with any one of a flat plate, a nut, or a node at the tip of a linear bar-like portion protrudes from the side surface, and the joint length is reduced. It can be used for the bonded structure.
[0086]
According to the invention described in claim 18, a reinforced concrete is produced in which a joint reinforcing bar provided with either a flat plate, a nut, or a node at the tip of a linear bar-like portion projects from the side surface, and then the joint reinforcing bar projects. Larger reinforced concrete in which small reinforced concrete is continuous by placing reinforced concrete in the formwork with the side surfaces facing each other facing each other and placing the joints in the formwork and placing concrete in the area surrounded by the side face and formwork Can be manufactured.
[0087]
According to the nineteenth aspect of the present invention, a reinforced concrete is produced in which a jointed reinforcing bar in which either a flat plate, a nut, or a node is provided at the end of a linear bar-like part is held on the side surface, and then the reinforced concrete is joined together. Therefore, reinforced concrete can be joined with a short joint length.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing an embodiment of a joint structure of reinforced concrete according to the present invention, where (a) is a vertical sectional view, (b) is a plan view, and (c) is a vertical sectional view showing another embodiment. It is.
FIG. 2 is a diagram showing an embodiment of a reinforced concrete joint structure according to the present invention, wherein (a), (b), and (c) are vertical cross-sectional views, and (d) is a diagram of (a) to (c). FIG.
FIGS. 3A and 3B are diagrams showing an embodiment of a joint structure of reinforced concrete according to the present invention, wherein FIG. 3A is a vertical sectional view and FIG. 3B is a plan view.
4A and 4B are diagrams showing an example of a form of a mold used in the method for producing reinforced concrete according to the present invention, wherein FIG. 4A is a plan view, and FIG.
5A and 5B are diagrams showing an embodiment of a method for joining reinforced concrete according to the present invention, in which FIG. 5A is a plan view and FIG. 5B is an elevation view.
FIG. 6 is a view showing an example of a form of a form used in the method for producing reinforced concrete according to the present invention, where (a) is a plan view and (b) is an elevation view.
7A and 7B are diagrams showing an embodiment of a joint structure of reinforced concrete according to the present invention, in which FIG. 7A is a horizontal sectional view, and FIG. 7B is an elevation view.
FIG. 8 is a vertical sectional view showing an embodiment of a reinforced concrete joint structure according to the present invention.
FIG. 9 is a vertical sectional view showing an embodiment of a reinforced concrete joint structure according to the present invention.
FIGS. 10A and 10B are diagrams showing an embodiment of a joint structure of reinforced concrete according to the present invention, in which FIG. 10A is a vertical sectional view and FIG. 10B is a plan view.
11A is a view showing an example of the form of a joint surface of reinforced concrete used in the present invention, and FIG. 11B is an elevation view showing an example of using the reinforced concrete of FIG.
12A and 12B are plan views showing an embodiment of a joint structure of reinforced concrete according to the present invention, wherein FIG. 12A is a view in which a nut is provided at the end of the joint rebar, FIG. 12B is a view in which a flat plate is provided, and FIG. ) Is a figure with a section.
13A and 13B are diagrams showing a conventional reinforced concrete joining structure, where FIG. 13A is a vertical sectional view, and FIG. 13B is a plan view.
14A and 14B are diagrams showing a conventional reinforced concrete joining structure, where FIG. 14A is a vertical sectional view, and FIG. 14B is a plan view.
15A and 15B are diagrams showing a conventional reinforced concrete joining structure, in which FIG. 15A is a vertical sectional view, and FIG. 15B is a plan view.
16A and 16B are diagrams showing a conventional reinforced concrete joining structure, in which FIG. 16A is a vertical sectional view, and FIG. 16B is a plan view.
[Explanation of symbols]
1, 1a, 1b, 1c, 1d, 61 Reinforced concrete member
2, 62 Concrete
3, 63 Joint surface
20, 50, 64 Reinforcing bars
21 Folding part
22 Both sides
23 Connecting part
24 corners
30 Reinforcing bars
40, 43, 44 formwork
41 Incisor Jig
42 Reinforcing Bar
51 flat plate
52 Nut
Verse 53
65, 67 accessory muscle
66 loop rebar

Claims

In a structure in which concrete is placed and joined in a state where the jointed reinforcing bars protruding from the joint surfaces of the opposing reinforced concrete are partially overlapped with each other, the jointed reinforcing bars are formed from both sides of the parallel straight line and from both sides. It has a shape including a connecting portion in which a straight line portion or a curved portion continues through a corner portion or a bent portion, and concrete is placed on both sides and a portion surrounded by the connecting portion. Reinforced concrete joint structure.

The joint structure of reinforced concrete according to claim 1, wherein at least one of both side portions of the joint reinforcing bar is overlapped with each other.

The joint structure of reinforced concrete according to claim 1 or 2, wherein the joint reinforcing bars are overlapped with each other on two side portions.

The joint structure of reinforced concrete according to claim 1, wherein the joint reinforcing bars intersect with each other at at least two places.

The joint structure of reinforced concrete according to claim 4, wherein the joint reinforcing bars do not overlap at both side portions but intersect with each other only at the connecting portion.

The joint structure of reinforced concrete according to any one of claims 2 to 5, wherein the joint reinforcing bars are joined to each other at an overlapped portion thereof overlapped with each other or at an intersecting portion intersected with each other.

The reinforced concrete joining structure according to any one of claims 1 to 6, wherein a reinforcing reinforcing bar orthogonal to the joining reinforcing bar is disposed in the corner part, the bent part, or the connecting part.

The reinforced concrete joint structure according to any one of claims 1 to 7, wherein reinforcing reinforcing bars orthogonal to the joint reinforcing bars are arranged on both side portions.

The reinforced concrete joining structure according to claim 7 or 8, wherein the reinforcing reinforcing bars are passed through a portion surrounded by the joining reinforcing bars.

The joint structure of reinforced concrete according to any one of claims 1 to 9, wherein the joint reinforcing bars are arranged on a horizontal plane, a vertical plane, or an inclined plane.

Line up precast concrete members with jointed reinforcing bars protruding from the sides, with parallel straight sides and connecting portions where straight or curved parts continue from both sides via corners or bent parts A method for constructing a reinforced concrete frame, characterized by filling concrete between precast concrete members in a state in which the joining rebars are overlapped and solidifying.

Reinforcement rods in a mold that holds jointed rebars on the sides that have parallel straight sides and connecting portions where straight or curved parts continue from both sides via corners or bent parts A method for constructing reinforced concrete, characterized in that concrete is placed in a formwork.

Reinforcement rods in a formwork that holds jointed rebars on the sides that have parallel straight sides and a connecting part where straight or curved parts continue from both sides via corners or bent parts To produce reinforced concrete by placing concrete in the formwork, then facing the protruding side of the jointed rebar, and arranging the reinforced concrete in the formwork with the jointed rebar superimposed A method for constructing reinforced concrete, characterized in that concrete is cast in a range surrounded by the opposing side surfaces and the formwork.

Reinforcement rods in a mold that holds jointed rebars on the sides that have parallel straight sides and connecting portions where straight or curved parts continue from both sides via corners or bent parts And reinforced concrete is produced by placing concrete in the formwork, and then the reinforced concretes are arranged in the formwork in such a manner that the side surfaces from which the joint rebars are opposed to each other. A method for joining reinforced concrete, characterized in that concrete is placed in an area surrounded by steel.

In the structure in which the joint reinforcing bars protruding from the joint surface of the opposing reinforced concrete are partially overlapped with each other, and the concrete is cast and joined, the joining reinforcing bars are a flat plate, nut, or A joint structure of reinforced concrete, characterized in that one of the nodes is provided.

Precast concrete members with either one of the flat bars, nuts, or joints provided at the end of the straight bar-shaped part are arranged side by side, and the precast concrete members are placed between the precast concrete members in a state where the joint reinforcing bars are overlapped. A method for constructing a reinforced concrete frame, characterized by filling and solidifying.

Reinforcing rods are installed in a formwork that holds a jointed rebar with either a flat plate, nut, or node at the end of a straight bar-like part, and concrete is placed in the formwork Reinforced concrete construction method.

Reinforcement rods are installed in a mold that holds a jointed rebar with either a flat plate, a nut, or a node at the end of a straight bar, and the concrete is placed in the mold to place the reinforced concrete. The side surfaces from which the joint rebars protrude are made to face each other, and the reinforced concrete is arranged in a formwork in a state where the joint rebars are overlapped with each other, and the concrete is cast in a range surrounded by the facing side faces and the formwork. A method for constructing reinforced concrete, characterized by comprising:

Reinforcement rods are installed in a mold that holds a jointed rebar with either a flat plate, a nut, or a node at the end of a straight bar, and the concrete is placed in the mold to place the reinforced concrete. The reinforced concrete is manufactured, and then the reinforced concrete is arranged in a mold with the protruding side surfaces of the joining reinforcing bars facing each other, and the concrete is placed in a range surrounded by the opposed side faces and the mold. Joining method.