JP3574824B1 - Reinforcement method of beam-column joint of existing building - Google Patents

Reinforcement method of beam-column joint of existing building Download PDF

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JP3574824B1
JP3574824B1 JP2003117813A JP2003117813A JP3574824B1 JP 3574824 B1 JP3574824 B1 JP 3574824B1 JP 2003117813 A JP2003117813 A JP 2003117813A JP 2003117813 A JP2003117813 A JP 2003117813A JP 3574824 B1 JP3574824 B1 JP 3574824B1
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reinforcing
steel
plate
reinforcing steel
steel pipe
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JP2004324129A (en
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啓一郎 吹田
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Kansai Technology Licensing Organization Co Ltd
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Abstract

【課題】補強工事中の火災に対する安全性が高く、既存建物の室内利用を妨げない補強工事が可能である既存建物の柱梁接合部の補強工法を提供する。
【解決手段】既存建物の鋼管柱２とＨ形鋼梁３との接合部である柱梁接合部１を補強する工法であって、縦板４ａ，５ａと横板４ｂ，５ｂとから略Ｌ字形に形成された２つの補強鋼材４，５の各縦板４ａ，５ａを鋼管柱２の外周面２ａにワンサイドボルト６で取り付け、一方の補強鋼材４の横板４ｂをＨ形鋼梁３の上方のフランジ３ａにボルト７で取り付け、他方の補強鋼材５の横板５ｂをＨ形鋼梁３の下方のフランジ３ｂにボルト７で取り付ける。
【選択図】 図３An object of the present invention is to provide a reinforcing method for a beam-column joint of an existing building, which has high safety against fire during the reinforcing work and can perform a reinforcing work without hindering indoor use of the existing building.
A method of reinforcing a beam-to-column joint 1 which is a joint between a steel pipe column 2 and an H-shaped steel beam 3 of an existing building, wherein the vertical plate 4a, 5a and the horizontal plates 4b, 5b are substantially L-shaped. The vertical plates 4a and 5a of the two reinforcing steel members 4 and 5 formed in a U-shape are attached to the outer peripheral surface 2a of the steel pipe column 2 with one-side bolts 6, and the horizontal plate 4b of one reinforcing steel member 4 is attached to the H-shaped steel beam 3 And the horizontal plate 5b of the other reinforcing steel material 5 is mounted on the lower flange 3b of the H-shaped steel beam 3 with bolts 7.
[Selection diagram] FIG.

Description

【０００１】
【発明の属する技術分野】
この発明は、既に建築・建造された既存建物の柱梁接合部の耐震補強等に使用される補強工法に関する。
【０００２】
【従来の技術】
周知のように、既存の鉄骨造建物における角形鋼管柱とＨ形鋼梁との接合部（柱梁接合部）は、大半が溶接により接合されている。このような柱梁接合部に対し、溶接に不具合のある箇所の補修や、設計耐力が不足している場合の補強を行うには、既存の溶接をガウジングではつり落としてから再度溶接するか、あるいは補強鋼材を溶接で取り付ける等の方法が採られている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開２００１−２８８８２３号公報（第２−４頁，図１−図５等）
【０００４】
【発明が解決しようとする課題】
上記のような方法では、溶接時に火器を使用するので、既存建物内の補強箇所周辺を火災から守るための空間の確保と養生が必要であり、一時的に補強箇所周辺の室内利用を止める必要がある。しかし、既存建物は社会・経済活動に供せられており、一時的ではあっても室内利用が規制されることは既存建物の所有者や経営者にとって受け入れがたい場合が多いので、耐震改修実施の決断と普及の促進を妨げる一因となっている。
【０００５】
この発明は、以上のような事情に鑑みてなされたものであり、補強工事中の火災に対する安全性が高く、既存建物の室内利用を妨げない補強工事が可能である既存建物の柱梁接合部の補強工法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記目的を達成するための請求項１の発明は、既存建物の鋼管柱とＨ形鋼梁との接合部である柱梁接合部を補強する工法であって、縦板と横板とから略Ｌ字形に形成された２つの補強鋼材の各縦板を互いに重合するようにして前記鋼管柱の外周面にワンサイドボルトで取り付け、一方の補強鋼材の横板を前記Ｈ形鋼梁の上方のフランジにボルトで取り付け、他方の補強鋼材の横板を前記Ｈ形鋼梁の下方のフランジにボルトで取り付けるものである。
【０００７】
請求項２の発明は、前記補強鋼材と、前記フランジ又は前記鋼管柱との間にスペーサを介在させるものである。
【０００８】
請求項３の発明は、前記鋼管柱の頂部に設けられた通しダイアフラム上に補強鋼板をワンサイドボルトで取り付け、前記補強鋼板を前記上方のフランジに前記一方の補強鋼材の横板と共に前記ボルトで取り付けるものである。
【０００９】
請求項４の発明は、既存建物の鋼管柱とＨ形鋼梁との接合部である柱梁接合部を補強する工法であって、前記鋼管柱の頂部に設けられた通しダイアフラムに前記鋼管柱の内部空間と連通する作業用孔を形成し、縦板と横板とから略Ｌ字形に形成された２つの補強鋼材の各縦板を互いに重合するようにして前記鋼管柱の外周面にボルトで取り付け、前記通しダイアフラム上に補強鋼板をワンサイドボルトで取り付け、一方の補強鋼材の横板を前記Ｈ形鋼梁の上方のフランジに前記補強鋼板と共にボルトで取り付け、他方の補強鋼材の横板を前記Ｈ形鋼梁の下方のフランジにボルトで取り付けるものである。
【００１０】
請求項５の発明は、縦板と横板とから略Ｌ字形に形成されかつ前記縦板と前記横板との内隅部に補強リブが突設された補助補強鋼材の前記縦板を前記鋼管柱の外周面にワンサイドボルトで取り付け、前記補助補強鋼材の横板を前記フランジに前記補強鋼材の横板と共に前記ボルトで取り付けるものである。
【００１１】
請求項６の発明は、前記補助補強鋼材と、前記フランジ又は前記鋼管柱との間にスペーサを介在させるものである。
【００１２】
【発明の実施の形態】
以下、この発明の実施形態を図面に基づいて説明する。
第１実施形態に係る既存建物の柱梁接合部１の補強工法は、図１乃至図５に示すように、既存建物の鋼管柱２とＨ形鋼梁３との接合部である柱梁接合部１を補強する工法であって、２つの補強鋼材４，５の各縦板４ａ，５ａを互いに重合するようにして鋼管柱２の外周面２ａにワンサイドボルト６で取り付け、一方の補強鋼材４の横板４ｂをＨ形鋼梁３の上方のフランジ３ａにボルト７で取り付け、他方の補強鋼材５の横板５ｂをＨ形鋼梁３の下方のフランジ３ｂにボルト７で取り付けるものである。
【００１３】
鋼管柱２は、図１及び図２に示すように、横断面が正方形状に形成された角形鋼管柱であり、柱梁接合部１には、鋼管柱２の一部を構成する横断面が正方形状の接合鋼管８及び正方形板状の２つの通しダイアフラム９，１０が設けられている。各通しダイアフラム９，１０は接合鋼管８の上端及び下端にそれぞれ溶接されており、各通しダイアフラム９，１０には上方の鋼管柱２と下方の鋼管柱２がそれぞれ溶接されている。接合鋼管８を含む鋼管柱２の横断面形状は正方形状に限定されるものではなく、円状や多角形状等であってもよい。
【００１４】
Ｈ形鋼梁３は、ウェブ３ｃと、このウェブ３ｃの上縁及び下縁にそれぞれ設けられた２つのフランジ３ａ，３ｂとから横断面がＨ形に形成されている。上方のフランジ３ａは上方の通しダイアフラム９に溶接されており、下方のフランジ３ｂは下方の通しダイアフラム１０に溶接されている。ウェブ３ｃは、接合鋼管８の外周面２ａに溶接されている。この実施形態においては、３つのＨ形鋼梁３が鋼管柱２に接合されているが、これに限定されるものではなく、１つ、２つ、又は４つのＨ形鋼梁３を鋼管柱２と接合することもできる。
【００１５】
補強鋼材４は、図３乃至図５に示すように、縦板４ａと横板４ｂとからＬ字形に形成されている。補強鋼材５も、縦板５ａと横板５ｂとからＬ字形に形成されている。この実施形態においては、補強鋼材５の縦板５ａと横板５ｂとの内隅部に補強リブ５ｃを突設しているが、これに限定されるものではなく、補強鋼材４の縦板４ａと横板４ｂとの内隅部にも補強リブを突設することができる。即ち、補強リブは、必要に応じて、２つの補強鋼材４，５のうちの少なくともいずれか一方に設けることができる。この場合、補強リブは、この実施形態のように、Ｈ形鋼梁３のウェブ３ｃ側に設けるのが望ましい。
【００１６】
ワンサイドボルト６としては、トルシア形高力ワンサイドボルト（ＴＣＢＢ）（例えば、ハック・インターナショナル・インコーポレイテッド社製）が好適である。このワンサイドボルト６にはナット１４が螺合されており、このナット１４は座金１５を介して縦板５ａ（４ａ）に当接するようになっている。また、図４に示すように、ワンサイドボルト６にはその頭部６ａ側から座屈変形可能な円管状の第１スリーブ６ｂ及び第２スリーブ６ｃが外嵌されており、接合鋼管８の外側からのボルト孔１１等へのワンサイドボルト６の挿入及び締め付けにより第１スリーブ６ｂが座屈変形して接合鋼管８の内部空間２ｂ側に特殊座金６ｄが形成されるので、所定の締付トルクを確保することができる。
【００１７】
ボルト７としては、高力ボルト（ＨＴＢ）や超高力ボルト（ＳＨＴＢ）が好適である。
【００１８】
柱梁接合部１の補強に際しては、図２に示すように、まず、接合鋼管８やＨ形鋼梁３のフランジ３ａ，３ｂの所定位置に電動ドリル等でそれぞれボルト孔１１，１２を形成する。次いで、図３乃至図５に示すように、２つの補強鋼材４，５の各縦板４ａ，５ａを互いに重合するようにして接合鋼管８の外周面２ａにワンサイドボルト６で取り付ける。各縦板４ａ，５ａには、あらかじめボルト孔１３を形成しておけばよい。各縦板４ａ，５ａを重合する順は特に限定されるものではなく、いずれが接合鋼管８側に位置してもよい。
【００１９】
また、一方の補強鋼材４の横板４ｂを上方のフランジ３ａにボルト７で取り付け、他方の補強鋼材５の横板５ｂを下方のフランジ３ｂにボルト７で取り付ける。各横板４ｂ，５ｂには、あらかじめボルト孔１６を形成しておけばよい。各ボルト７には、座金１５を介してナット１４を螺合し、このナット１４を締め付けて横板４ｂ，５ｂをフランジ３ａ，３ｂに固定すればよい。補強鋼材４，５の取り付けに使用するワンサイドボルト６やボルト７の数は特に限定されるものではなく、適宜変更可能である。
【００２０】
上記のような補強工法によれば、現場での鋼管柱２やＨ形鋼梁３へのボルト孔１１，１２の穿孔や、ワンサイドボルト６及びボルト７の締め付けだけで全強・剛接合として必要な耐力と変形能力を確保できるという利点がある。また、火器を使用する必要がないので、短期間に施工可能で補強工事中の火災に対する安全性が高く、補強箇所周辺の室内利用に対する制限も少なくて済むという利点がある。更に、補強鋼材４，５はコンパクトであるので、柱梁接合部１の補強後も室内空間の利用可能な範囲を低下させることがないという利点がある。
【００２１】
ここで、図３乃至図５に示すように、補強鋼材４，５と、フランジ３ａ，３ｂや鋼管柱２（接合鋼管８）との間にスペーサ１７を介在させれば、補強鋼材４，５の近傍に溶接部１８等の凹凸が存在する場合であっても、補強鋼材４，５を強固に取り付けることができるという利点がある。この場合、スペーサ１７には、あらかじめボルト孔１３，１６を形成しておけばよい。
【００２２】
第２実施形態に係る既存建物の柱梁接合部１の補強工法は、図６乃至図８に示すように、第１実施形態において、補助補強鋼材２１の縦板２１ａを鋼管柱２の外周面２ａにワンサイドボルト６で取り付け、補助補強鋼材２１の横板２１ｂをフランジ３ａ，３ｂに補強鋼材４，５の横板４ｂ，５ｂと共にボルト７で取り付けるものである。
【００２３】
補助補強鋼材２１は、縦板２１ａと横板２１ｂとからＬ字形に形成されており、縦板２１ａと横板２１ｂとの内隅部に補強リブ２１ｃが突設されている。縦板２１ａには、図７に示すように、ワンサイドボルト６を挿通するためのボルト孔１３があらかじめ形成されている。横板２１ｂには、図７及び図８に示すように、ボルト７を挿通するためのボルト孔１６があらかじめ形成されている。
【００２４】
柱梁接合部１の補強に際しては、図６に示すように、まず、接合鋼管８やＨ形鋼梁３のフランジ３ａ，３ｂの他、鋼管柱２の所定位置にも電動ドリル等でボルト孔１１を形成する。補助補強鋼材２１の縦板２１ａは、第１実施形態と同様にしてワンサイドボルト６で鋼管柱２の外周面２ａに取り付ける。横板２１ｂは、一方の補強鋼材４の横板４ｂ又は他方の補強鋼材５の横板５ｂと共に上方のフランジ３ａ又は下方のフランジ３ｂにボルト７で取り付ける。
【００２５】
このように、補強鋼材４，５に加えて補助補強鋼材２１も使用すれば、柱梁接合部１をより強固に補強できるという利点がある。ここで、図７及び図８に示すように、第１実施形態と同様、補助補強鋼材２１と、フランジ３ａ，３ｂや鋼管柱２（接合鋼管８）との間にスペーサ１７を介在させれば、補助補強鋼材２１の近傍に溶接部１８等の凹凸が存在する場合であっても、補助補強鋼材２１を強固に取り付けることができるという利点がある。この場合、スペーサ１７には、あらかじめボルト孔１３，１６を形成しておけばよい。
【００２６】
第３実施形態に係る既存建物の柱梁接合部１の補強工法は、図９及び図１０に示すように、第１実施形態において、鋼管柱２の頂部に設けられた通しダイアフラム９に接合鋼管８の内部空間２ｂと連通する作業用孔３１を形成し、２つの補強鋼材４，５の各縦板４ａ，５ａを互いに重合するようにして接合鋼管８の外周面２ａにボルト７で取り付け、通しダイアフラム９上に補強鋼板３２をワンサイドボルト６で取り付け、一方の補強鋼材４の横板４ｂを上方のフランジ３ａに補強鋼板３２と共にボルト７で取り付け、他方の補強鋼材５の横板５ｂを下方のフランジ３ｂにボルト７で取り付けるものである。
【００２７】
補強鋼板３２は、正方形状の基板３２ａと、この基板３２ａの端部に突設された３つの突出板３２ｂとから構成されている。基板３２ａの所定位置には、ワンサイドボルト６を挿通するためのボルト孔１１があらかじめ形成されている。突出板３２ｂの所定位置には、ボルト７を挿通するためのボルト孔１２があらかじめ形成されている。突出板３２ｂの数は３つに限定されるものではなく、鋼管柱２と接合するＨ形鋼梁３の数に合わせて形成することができる。
【００２８】
柱梁接合部１の補強に際しては、図９に示すように、まず、接合鋼管８やＨ形鋼梁３のフランジ３ａ，３ｂの他、通しダイアフラム９の所定位置にも電動ドリル等でボルト孔１１を形成すると共に、作業用孔３１を形成する。２つの補強鋼材４，５の各縦板４ａ，５ａは、ボルト７で接合鋼管８の外周面２ａに取り付ける。通しダイアフラム９に作業用孔３１を形成すれば、ボルト７を接合鋼管８の内部空間２ｂ側から接合鋼管８のボルト孔１１及び各縦板４ａ，５ａのボルト孔１３に挿通することができる。ボルト７には、座金１５を介してナット１４を螺合し、このナット１４を締め付けて各縦板４ａ，５ａを接合鋼管８の外周面２ａに取り付ければよい。
【００２９】
補強鋼板３２の基板３２ａは、通しダイアフラム９上にワンサイドボルト６で取り付ける。補強鋼板３２の突出板３２ｂは、一方の補強鋼材４の横板４ｂと共に上方のフランジ３ａにボルト７で取り付ける。他方の補強鋼材５の横板５ｂは、第１実施形態と同様にして下方のフランジ３ｂにボルト７で取り付ける。
【００３０】
上記のような補強工法によれば、鋼管柱２の頂部に位置する柱梁接合部１の補強をすることができ、第１実施形態と同様の利点がある。この場合、第２実施形態の補助補強鋼材２１を下方のフランジ３ｂ及び鋼管柱２に取り付けるようにすれば、柱梁接合部１をより強固に補強できるという利点がある。
【００３１】
なお、通しダイアフラム９に作業用孔３１を形成しない場合は、２つの補強鋼材４，５の各縦板４ａ，５ａを接合鋼管８の外周面２ａに第１実施形態と同様にしてワンサイドボルト６で取り付けることができる。
【００３２】
以上の第１乃至第３実施形態においては、２つの補強鋼材４，５の各縦板４ａ，５ａを重合するようにして取り付けているが、これに限定されるものではなく、図１１に示すように、各縦板４ａ，５ａを重合することなくそれぞれを鋼管柱２（接合鋼管８）の外周面２ａに取り付けることができる。この場合、既述と同様、各縦板４ａ，５ａと鋼管柱２（接合鋼管８）との間には、スペーサ１７を介在させることもできる。
【００３３】
また、補強鋼材４，５や補助補強鋼材２１をＬ字形に形成、即ち、縦板４ａ，５ａと横板４ｂ，５ｂがなす角度や、縦板２１ａと横板２１ｂがなす角度を直角としているが、これに限定されるものではなく、Ｈ形鋼梁３のウェブ３ｃが鋼管柱２側に向かって幅広に形成されている場合、縦板４ａ，５ａと横板４ｂ，５ｂがなす角度や、縦板２１ａと横板２１ｂがなす角度は、フランジ３ａ，３ｂの傾斜角度に合わせて鋭角又は鈍角とすることができる。
【００３４】
なお、図１１に示す例では、補強鋼材４，５に補強リブ５ｃ等を設けていないが、この場合も既述のように、補強リブは２つの補強鋼材４，５のうちの少なくともいずれか一方に設けることができる。
【００３５】
【発明の効果】
以上のように、請求項１の発明によれば、現場での鋼管柱やＨ形鋼梁へのボルト孔の穿孔や、ワンサイドボルト及びボルトの締め付けだけで全強・剛接合として必要な耐力と変形能力を確保できる。また、火器を使用する必要がないので、短期間に施工可能で補強工事中の火災に対する安全性が高く、補強箇所周辺の室内利用に対する制限も少なくて済む。更に、補強鋼材はコンパクトであるので、柱梁接合部の補強後も室内空間の利用可能な範囲を低下させることがない。
【００３６】
請求項２の発明によれば、補強鋼材と、フランジ又は鋼管柱との間にスペーサを介在させるので、補強鋼材の近傍に溶接部等の凹凸が存在する場合であっても、補強鋼材を強固に取り付けることができる。
【００３７】
請求項３の発明によれば、鋼管柱の頂部に位置する柱梁接合部の補強をすることができ、請求項１と同様の効果がある。
【００３８】
請求項４の発明によれば、鋼管柱の頂部に位置する柱梁接合部の補強をすることができ、請求項１と同様の効果があると共に、補強鋼材をボルトでより強固に取り付けることができる。
【００３９】
請求項５の発明によれば、補強鋼材に加えて補助補強鋼材も使用するので、柱梁接合部をより強固に補強できる。
【００４０】
請求項６の発明によれば、補助補強鋼材と、フランジ又は鋼管柱との間にスペーサを介在させるので、補助補強鋼材の近傍に溶接部等の凹凸が存在する場合であっても、補助補強鋼材を強固に取り付けることができる。
【図面の簡単な説明】
【図１】第１実施形態に係る既存建物の柱梁接合部の補強工法において、ボルト孔を形成する前の状態を示す斜視図。
【図２】ボルト孔を形成した状態を示す斜視図。
【図３】補強鋼材を取り付けた状態を示す側面図。
【図４】図３のＡ−Ａ線断面図。
【図５】補強鋼材を取り付けた状態を示す正面図。
【図６】第２実施形態に係る既存建物の柱梁接合部の補強工法において、ボルト孔を形成した状態を示す斜視図。
【図７】補強鋼材及び補助補強鋼材を取り付けた状態を示す側面図。
【図８】補強鋼材及び補助補強鋼材を取り付けた状態を示す正面図。
【図９】第３実施形態に係る既存建物の柱梁接合部の補強工法において、補強鋼板を取り付ける様子を示す斜視図。
【図１０】補強鋼材及び補強鋼板を取り付けた状態を示す概略正面図。
【図１１】補強鋼材の各縦板を重合しないで取り付けた状態を示す側面図。
【符号の説明】
１ 柱梁接合部
２ 鋼管柱
２ａ 外周面
３ Ｈ形鋼梁
３ａ，３ｂ フランジ
４，５ 補強鋼材
４ａ，５ａ 縦板
４ｂ，５ｂ 横板
６ ワンサイドボルト
７ ボルト
１７ スペーサ
２１ 補助補強鋼材
２１ａ 縦板
２１ｂ 横板
２１ｃ 補強リブ
３１ 作業用孔
３２ 補強鋼板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforcing method used for, for example, seismic reinforcement of a beam-column joint of an existing building that has already been constructed and built.
[0002]
[Prior art]
As is well known, most of the joints (column-beam joints) between rectangular steel pipe columns and H-beams in existing steel-framed buildings are joined by welding. For such column-to-column joints, in order to repair defective welds or to reinforce when the design strength is insufficient, gouging the existing welding and re-welding, Alternatively, a method of attaching a reinforcing steel material by welding or the like is adopted (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-288823 A (pages 2-4, FIGS. 1-5, etc.)
[0004]
[Problems to be solved by the invention]
In the above-mentioned method, firearms are used during welding, so it is necessary to secure space and protect the area around the reinforcement points in the existing building from fire, and temporarily stop indoor use around the reinforcement points. There is. However, existing buildings are being used for social and economic activities, and it is often unacceptable for owners and managers of existing buildings to restrict the use of indoors, even temporarily. Is a factor that has hindered the decision and promotion of dissemination.
[0005]
The present invention has been made in view of the above circumstances, and has high safety against fire during reinforcement work, and is capable of performing a reinforcement work that does not hinder indoor use of an existing building. The purpose is to provide a reinforcement method.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 for achieving the above object is a method of reinforcing a beam-column joint, which is a joint between a steel pipe column and an H-shaped steel beam of an existing building, and the method is substantially composed of a vertical plate and a horizontal plate. Each L-shaped vertical plate of reinforcing steel material is attached to the outer peripheral surface of the steel pipe column by one-side bolt so as to overlap with each other , and one of the reinforcing steel horizontal plates is placed above the H-shaped steel beam. A bolt is attached to the flange, and the other reinforcing steel plate is attached to a flange below the H-shaped steel beam with a bolt.
[0007]
The invention according to claim 2 is to interpose a spacer between the reinforcing steel material and the flange or the steel pipe column.
[0008]
The invention according to claim 3 is characterized in that a reinforcing steel plate is mounted on a through-diaphragm provided on the top of the steel pipe column with a one-side bolt, and the reinforcing steel plate is attached to the upper flange together with the one side plate of the reinforcing steel material by the bolt. Attach it.
[0009]
The invention according to claim 4 is a method of reinforcing a beam-column joint, which is a joint between a steel pipe column and an H-shaped steel beam of an existing building, wherein the steel pipe column is provided on a through-diaphragm provided at the top of the steel pipe column. A working hole communicating with the internal space of the steel pipe column is formed, and two vertical plates of two reinforcing steel members formed in a substantially L shape from the vertical plate and the horizontal plate are overlapped with each other so that bolts are formed on the outer peripheral surface of the steel pipe column. And a reinforcing steel plate is mounted on the through-diaphragm with a one-side bolt, and a horizontal plate of one reinforcing steel material is mounted on the upper flange of the H-shaped steel beam together with the reinforcing steel plate with bolts, and a horizontal plate of the other reinforcing steel material is mounted. Is attached to the lower flange of the H-shaped steel beam with bolts.
[0010]
The invention according to claim 5 is characterized in that the vertical plate and the horizontal plate are formed in an approximately L-shape, and the vertical plate is formed of an auxiliary reinforcing steel material having reinforcing ribs protruding at inner corners of the vertical plate and the horizontal plate. One side bolt is attached to the outer peripheral surface of the steel pipe column, and the horizontal plate of the auxiliary reinforcing steel is attached to the flange together with the horizontal plate of the reinforcing steel with the bolt.
[0011]
According to a sixth aspect of the present invention, a spacer is interposed between the auxiliary reinforcing steel material and the flange or the steel pipe column.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 to FIG. 5, the beam-column joint 1 of the existing building, which is a joint between the steel pipe column 2 and the H-shaped steel beam 3 of the existing building, according to the first embodiment. This is a method of reinforcing the part 1, wherein the vertical plates 4 a, 5 a of the two reinforcing steel members 4, 5 are attached to the outer peripheral surface 2 a of the steel pipe column 2 with one-side bolts 6 so as to overlap each other. 4 is attached to the flange 3a above the H-shaped steel beam 3 with bolts 7, and the horizontal plate 5b of the other reinforcing steel material 5 is attached to the flange 3b below the H-shaped steel beam 3 with bolts 7. .
[0013]
As shown in FIGS. 1 and 2, the steel pipe column 2 is a square steel pipe column having a square cross section, and the column-beam joint 1 has a cross section that forms a part of the steel pipe column 2. A square joining steel pipe 8 and two square plate-shaped through diaphragms 9 and 10 are provided. The through-diaphragms 9 and 10 are welded to the upper and lower ends of the joined steel pipe 8, respectively, and the upper and lower steel pipe columns 2 and 2 are welded to the through-diaphragms 9 and 10, respectively. The cross-sectional shape of the steel pipe column 2 including the joined steel pipe 8 is not limited to a square shape, but may be a circular shape, a polygonal shape, or the like.
[0014]
The H-shaped steel beam 3 has an H-shaped cross section formed by a web 3c and two flanges 3a and 3b provided on an upper edge and a lower edge of the web 3c. The upper flange 3a is welded to the upper through-diaphragm 9 and the lower flange 3b is welded to the lower through-diaphragm 10. The web 3c is welded to the outer peripheral surface 2a of the joined steel pipe 8. In this embodiment, three H-shaped steel beams 3 are joined to the steel pipe column 2, but the present invention is not limited to this, and one, two, or four H-shaped steel beams 3 are connected to the steel pipe column. 2 can also be joined.
[0015]
As shown in FIGS. 3 to 5, the reinforcing steel material 4 is formed in an L-shape from a vertical plate 4a and a horizontal plate 4b. The reinforcing steel material 5 is also formed in an L shape from the vertical plate 5a and the horizontal plate 5b. In this embodiment, the reinforcing ribs 5c are projected from the inner corners of the vertical plate 5a and the horizontal plate 5b of the reinforcing steel material 5, but the present invention is not limited to this. Reinforcing ribs can also be protruded at the inner corners of the horizontal plate 4b. That is, the reinforcing ribs can be provided on at least one of the two reinforcing steel materials 4 and 5 as needed. In this case, the reinforcing rib is desirably provided on the web 3c side of the H-shaped steel beam 3 as in this embodiment.
[0016]
As the one-side bolt 6, a torcia-type high-strength one-side bolt (TCBB) (for example, manufactured by Hack International, Inc.) is suitable. A nut 14 is screwed into the one-side bolt 6, and the nut 14 comes into contact with the vertical plate 5a (4a) via a washer 15. As shown in FIG. 4, the one-side bolt 6 is fitted with a tubular first sleeve 6 b and a second sleeve 6 c which can be buckled and deformed from the head 6 a side thereof. When the one-side bolt 6 is inserted into the bolt hole 11 or the like and tightened, the first sleeve 6b is buckled and deformed to form the special washer 6d on the inner space 2b side of the joined steel pipe 8, so that a predetermined tightening torque is provided. Can be secured.
[0017]
As the bolt 7, a high-strength bolt (HTB) or an ultra-high-strength bolt (SHTB) is preferable.
[0018]
When reinforcing the beam-to-column joint 1, first, as shown in FIG. 2, bolt holes 11 and 12 are respectively formed at predetermined positions of the joint steel pipe 8 and the flanges 3 a and 3 b of the H-shaped steel beam 3 by an electric drill or the like. . Next, as shown in FIGS. 3 to 5, the vertical plates 4 a and 5 a of the two reinforcing steel materials 4 and 5 are attached to the outer peripheral surface 2 a of the joined steel pipe 8 with one-side bolts 6 so as to overlap each other. A bolt hole 13 may be formed in advance in each of the vertical plates 4a and 5a. The order in which the vertical plates 4a and 5a are superposed is not particularly limited, and any one may be located on the joint steel pipe 8 side.
[0019]
Further, the horizontal plate 4b of one reinforcing steel member 4 is attached to the upper flange 3a with bolts 7, and the horizontal plate 5b of the other reinforcing steel member 5 is attached to the lower flange 3b with bolts 7. A bolt hole 16 may be formed in each of the horizontal plates 4b and 5b in advance. A nut 14 may be screwed to each bolt 7 via a washer 15, and the nut 14 may be tightened to fix the horizontal plates 4b, 5b to the flanges 3a, 3b. The number of one-side bolts 6 and bolts 7 used for attaching the reinforcing steel materials 4 and 5 is not particularly limited, and can be changed as appropriate.
[0020]
According to the above-described reinforcing method, a full-strength / rigid joint can be obtained only by drilling the bolt holes 11 and 12 in the steel pipe column 2 and the H-shaped steel beam 3 and tightening the one-side bolts 6 and 7 at the site. There is an advantage that necessary proof stress and deformation capacity can be secured. In addition, since it is not necessary to use a firearm, there is an advantage that construction can be performed in a short time, safety against fire during reinforcement work is high, and restrictions on indoor use around the reinforcement point can be reduced. Furthermore, since the reinforcing steel members 4 and 5 are compact, there is an advantage that the usable range of the indoor space is not reduced even after the column-beam joint 1 is reinforced.
[0021]
Here, as shown in FIGS. 3 to 5, if the spacer 17 is interposed between the reinforcing steel materials 4 and 5 and the flanges 3 a and 3 b and the steel pipe column 2 (joined steel pipe 8), the reinforcing steel materials 4 and 5 can be obtained. There is an advantage that the reinforcing steel members 4 and 5 can be firmly attached even when there are irregularities such as the welded portion 18 in the vicinity of. In this case, the bolt holes 13 and 16 may be formed in the spacer 17 in advance.
[0022]
As shown in FIGS. 6 to 8, the reinforcing method of the beam-to-column joint 1 of the existing building according to the second embodiment is different from the first embodiment in that the vertical plate 21 a of the auxiliary reinforcing steel material 21 is provided on the outer peripheral surface of the steel pipe column 2. 2a is attached with a one-side bolt 6, and the horizontal plate 21b of the auxiliary reinforcing steel material 21 is mounted on the flanges 3a, 3b together with the horizontal plates 4b, 5b of the reinforcing steel materials 4, 5 with bolts 7.
[0023]
The auxiliary reinforcing steel material 21 is formed in an L shape from a vertical plate 21a and a horizontal plate 21b, and a reinforcing rib 21c is protruded from an inner corner of the vertical plate 21a and the horizontal plate 21b. As shown in FIG. 7, a bolt hole 13 for inserting the one-side bolt 6 is formed in the vertical plate 21a in advance. As shown in FIGS. 7 and 8, a bolt hole 16 for inserting the bolt 7 is formed in the horizontal plate 21b in advance.
[0024]
When reinforcing the beam-to-column joint 1, as shown in FIG. 6, first, in addition to the joint steel pipe 8 and the flanges 3 a and 3 b of the H-shaped steel beam 3, a bolt hole is also provided at a predetermined position of the steel pipe column 2 using an electric drill or the like. 11 is formed. The vertical plate 21a of the auxiliary reinforcing steel material 21 is attached to the outer peripheral surface 2a of the steel pipe column 2 with the one-side bolt 6 in the same manner as in the first embodiment. The horizontal plate 21b is attached to the upper flange 3a or the lower flange 3b with the bolt 7 together with the horizontal plate 4b of one reinforcing steel member 4 or the horizontal plate 5b of the other reinforcing steel member 5.
[0025]
As described above, when the auxiliary reinforcing steel material 21 is used in addition to the reinforcing steel materials 4 and 5, there is an advantage that the beam-column joint 1 can be reinforced more strongly. Here, as shown in FIGS. 7 and 8, similarly to the first embodiment, if the spacer 17 is interposed between the auxiliary reinforcing steel material 21 and the flanges 3 a and 3 b and the steel pipe column 2 (joined steel pipe 8). In addition, even when there are irregularities such as the welded portion 18 near the auxiliary reinforcing steel material 21, there is an advantage that the auxiliary reinforcing steel material 21 can be firmly attached. In this case, the bolt holes 13 and 16 may be formed in the spacer 17 in advance.
[0026]
As shown in FIG. 9 and FIG. 10, the reinforcing method of the beam-to-column joint 1 of the existing building according to the third embodiment uses a steel pipe joined to the through-diaphragm 9 provided on the top of the steel pipe column 2 in the first embodiment. A working hole 31 communicating with the internal space 2b of the steel pipe 8 is formed, and the vertical plates 4a, 5a of the two reinforcing steel members 4, 5 are attached to the outer peripheral surface 2a of the joined steel pipe 8 with bolts 7 so as to overlap each other. A reinforcing steel plate 32 is mounted on the through-diaphragm 9 with one-side bolts 6, a horizontal plate 4b of one reinforcing steel material 4 is mounted on the upper flange 3a together with the reinforcing steel plate 32 with bolts 7, and a horizontal plate 5b of the other reinforcing steel material 5 is mounted. It is attached to the lower flange 3b with bolts 7.
[0027]
The reinforcing steel plate 32 includes a square substrate 32a and three protruding plates 32b protruding from an end of the substrate 32a. At a predetermined position of the substrate 32a, a bolt hole 11 for inserting the one-side bolt 6 is formed in advance. At a predetermined position of the protruding plate 32b, a bolt hole 12 for inserting the bolt 7 is formed in advance. The number of the protruding plates 32b is not limited to three, and can be formed according to the number of the H-shaped steel beams 3 to be joined to the steel pipe columns 2.
[0028]
When reinforcing the beam-column joint 1, as shown in FIG. 9, first, in addition to the joint steel pipe 8 and the flanges 3 a and 3 b of the H-shaped steel beam 3, a bolt hole is also formed at a predetermined position of the through diaphragm 9 with an electric drill or the like. 11 and the working hole 31 are formed. The vertical plates 4a, 5a of the two reinforcing steel members 4, 5 are attached to the outer peripheral surface 2a of the joined steel pipe 8 with bolts 7. If the working hole 31 is formed in the through-diaphragm 9, the bolt 7 can be inserted into the bolt hole 11 of the joined steel pipe 8 and the bolt hole 13 of each of the vertical plates 4 a and 5 a from the inner space 2 b side of the joined steel pipe 8. A nut 14 is screwed onto the bolt 7 via a washer 15, and the nut 14 is tightened to attach the vertical plates 4 a and 5 a to the outer peripheral surface 2 a of the joined steel pipe 8.
[0029]
The substrate 32 a of the reinforcing steel plate 32 is mounted on the through-diaphragm 9 with the one-side bolt 6. The protruding plate 32b of the reinforcing steel plate 32 is attached to the upper flange 3a together with the lateral plate 4b of one reinforcing steel member 4 by bolts 7. The horizontal plate 5b of the other reinforcing steel material 5 is attached to the lower flange 3b with bolts 7 in the same manner as in the first embodiment.
[0030]
According to the above-described reinforcing method, the beam-column joint 1 located at the top of the steel pipe column 2 can be reinforced, and there is the same advantage as in the first embodiment. In this case, if the auxiliary reinforcing steel material 21 of the second embodiment is attached to the lower flange 3b and the steel pipe column 2, there is an advantage that the beam-column joint 1 can be reinforced more strongly.
[0031]
When the working hole 31 is not formed in the through-diaphragm 9, the vertical plates 4a, 5a of the two reinforcing steel members 4, 5 are attached to the outer peripheral surface 2a of the joined steel pipe 8 in the same manner as in the first embodiment. 6 can be attached.
[0032]
In the above-described first to third embodiments, the vertical plates 4a and 5a of the two reinforcing steel members 4 and 5 are attached so as to overlap each other. However, the present invention is not limited to this, and is shown in FIG. Thus, each of the vertical plates 4a and 5a can be attached to the outer peripheral surface 2a of the steel pipe column 2 (joined steel pipe 8) without overlapping. In this case, a spacer 17 can be interposed between the vertical plates 4a and 5a and the steel pipe column 2 (joined steel pipe 8) as described above.
[0033]
Further, the reinforcing steel materials 4, 5 and the auxiliary reinforcing steel material 21 are formed in an L-shape, that is, the angle formed by the vertical plates 4a, 5a and the horizontal plates 4b, 5b and the angle formed by the vertical plate 21a and the horizontal plate 21b are made right angles. However, the present invention is not limited to this, and when the web 3c of the H-shaped steel beam 3 is formed wider toward the steel pipe column 2 side, the angle between the vertical plates 4a, 5a and the horizontal plates 4b, 5b, The angle formed between the vertical plate 21a and the horizontal plate 21b can be an acute angle or an obtuse angle in accordance with the inclination angle of the flanges 3a, 3b.
[0034]
In the example shown in FIG. 11, the reinforcing ribs 5 c and the like are not provided on the reinforcing steel materials 4 and 5, but also in this case, as described above, the reinforcing rib is at least one of the two reinforcing steel materials 4 and 5. It can be provided on one side.
[0035]
【The invention's effect】
As described above, according to the first aspect of the present invention, the strength required as a full-strength / rigid joint is obtained only by drilling a bolt hole in a steel pipe column or an H-shaped steel beam on site and by tightening a one-side bolt and a bolt. And deformation capability. In addition, since it is not necessary to use a firearm, construction can be performed in a short time, safety against fire during reinforcement work is high, and restrictions on indoor use around the reinforcement point can be reduced. Furthermore, since the reinforced steel material is compact, the usable range of the indoor space is not reduced even after reinforcing the beam-column joint.
[0036]
According to the second aspect of the present invention, since the spacer is interposed between the reinforcing steel material and the flange or the steel pipe column, the reinforcing steel material can be solidified even when unevenness such as a welded portion exists near the reinforcing steel material. Can be attached to
[0037]
According to the third aspect of the invention, it is possible to reinforce the beam-column joint located at the top of the steel pipe column, and the same effect as that of the first aspect can be obtained.
[0038]
According to the invention of claim 4, the beam-column joint located at the top of the steel pipe column can be reinforced, and the same effect as in claim 1 can be obtained, and the reinforcing steel material can be more firmly attached with bolts. it can.
[0039]
According to the invention of claim 5, since the auxiliary reinforcing steel material is used in addition to the reinforcing steel material, the beam-column joint can be reinforced more strongly.
[0040]
According to the invention of claim 6, since the spacer is interposed between the auxiliary reinforcing steel material and the flange or the steel pipe column, even if there is unevenness such as a weld in the vicinity of the auxiliary reinforcing steel material, the auxiliary reinforcing is performed. Steel material can be attached firmly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state before a bolt hole is formed in a method of reinforcing a beam-column joint of an existing building according to a first embodiment.
FIG. 2 is a perspective view showing a state in which a bolt hole is formed.
FIG. 3 is a side view showing a state where a reinforcing steel material is attached.
FIG. 4 is a sectional view taken along line AA of FIG. 3;
FIG. 5 is a front view showing a state where a reinforcing steel material is attached.
FIG. 6 is a perspective view showing a state in which bolt holes are formed in a method of reinforcing a beam-column joint of an existing building according to the second embodiment.
FIG. 7 is a side view showing a state where a reinforcing steel material and an auxiliary reinforcing steel material are attached.
FIG. 8 is a front view showing a state where a reinforcing steel material and an auxiliary reinforcing steel material are attached.
FIG. 9 is a perspective view showing a state in which a reinforcing steel plate is attached in a method of reinforcing a beam-column joint of an existing building according to the third embodiment.
FIG. 10 is a schematic front view showing a state where a reinforcing steel material and a reinforcing steel plate are attached.
FIG. 11 is a side view showing a state where the vertical plates of the reinforcing steel material are attached without being overlapped.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Column-beam connection part 2 Steel pipe column 2a Outer peripheral surface 3 H-shaped steel beam 3a, 3b Flange 4, 5 Reinforcement steel 4a, 5a Vertical plate 4b, 5b Horizontal plate 6 One side bolt 7 Bolt 17 Spacer 21 Auxiliary reinforcement steel 21a Vertical plate 21b Horizontal plate 21c Reinforcement rib 31 Work hole 32 Reinforced steel plate

Claims (6)

既存建物の鋼管柱とＨ形鋼梁との接合部である柱梁接合部を補強する工法であって、
縦板と横板とから略Ｌ字形に形成された２つの補強鋼材の各縦板を互いに重合するようにして前記鋼管柱の外周面にワンサイドボルトで取り付け、
一方の補強鋼材の横板を前記Ｈ形鋼梁の上方のフランジにボルトで取り付け、
他方の補強鋼材の横板を前記Ｈ形鋼梁の下方のフランジにボルトで取り付けることを特徴とする既存建物の柱梁接合部の補強工法。A method of reinforcing a beam-column joint, which is a joint between a steel pipe column of an existing building and an H-beam,
Each of the two reinforcing steel members formed into a substantially L shape from the vertical plate and the horizontal plate is attached to the outer peripheral surface of the steel pipe column by one-side bolt so as to overlap each other ,
A horizontal plate of one reinforcing steel material is bolted to a flange above the H-shaped steel beam,
A method of reinforcing a beam-column joint of an existing building, wherein another horizontal plate made of reinforcing steel is attached to a lower flange of the H-shaped steel beam by bolts. 前記補強鋼材と、前記フランジ又は前記鋼管柱との間にスペーサを介在させる請求項１記載の既存建物の柱梁接合部の補強工法。The method for reinforcing a beam-to-column joint of an existing building according to claim 1, wherein a spacer is interposed between the reinforcing steel material and the flange or the steel pipe column. 前記鋼管柱の頂部に設けられた通しダイアフラム上に補強鋼板をワンサイドボルトで取り付け、
前記補強鋼板を前記上方のフランジに前記一方の補強鋼材の横板と共に前記ボルトで取り付ける請求項１又は２記載の既存建物の柱梁接合部の補強工法。A reinforcing steel plate is attached with a one-side bolt on a through-diaphragm provided at the top of the steel pipe column,
The method of reinforcing a column-beam joint of an existing building according to claim 1 or 2, wherein the reinforcing steel plate is attached to the upper flange together with the one reinforcing steel transverse plate by the bolt. 既存建物の鋼管柱とＨ形鋼梁との接合部である柱梁接合部を補強する工法であって、
前記鋼管柱の頂部に設けられた通しダイアフラムに前記鋼管柱の内部空間と連通する作業用孔を形成し、
縦板と横板とから略Ｌ字形に形成された２つの補強鋼材の各縦板を互いに重合するようにして前記鋼管柱の外周面にボルトで取り付け、
前記通しダイアフラム上に補強鋼板をワンサイドボルトで取り付け、
一方の補強鋼材の横板を前記Ｈ形鋼梁の上方のフランジに前記補強鋼板と共にボルトで取り付け、
他方の補強鋼材の横板を前記Ｈ形鋼梁の下方のフランジにボルトで取り付けることを特徴とする既存建物の柱梁接合部の補強工法。A method of reinforcing a beam-column joint, which is a joint between a steel pipe column of an existing building and an H-beam,
Forming a working hole communicating with the internal space of the steel pipe column in the through diaphragm provided at the top of the steel pipe column,
A vertical plate and a horizontal plate are attached to the outer peripheral surface of the steel pipe column by bolts such that each vertical plate of two reinforcing steel materials formed in an approximately L shape is overlapped with each other ;
A reinforcing steel plate is mounted on the through diaphragm with one side bolt,
One reinforcing steel transverse plate is bolted together with the reinforcing steel plate to the upper flange of the H-shaped steel beam,
A method of reinforcing a beam-column joint of an existing building, wherein another horizontal plate made of reinforcing steel is attached to a lower flange of the H-shaped steel beam by bolts. 縦板と横板とから略Ｌ字形に形成されかつ前記縦板と前記横板との内隅部に補強リブが突設された補助補強鋼材の前記縦板を前記鋼管柱の外周面にワンサイドボルトで取り付け、
前記補助補強鋼材の横板を前記フランジに前記補強鋼材の横板と共に前記ボルトで取り付ける請求項１乃至４のいずれか記載の既存建物の柱梁接合部の補強工法。The vertical plate of an auxiliary reinforcing steel material formed into a substantially L-shape from a vertical plate and a horizontal plate and having reinforcing ribs protruding at inner corners of the vertical plate and the horizontal plate is provided on the outer peripheral surface of the steel pipe column. Attach with side bolts,
The method for reinforcing a beam-column joint of an existing building according to any one of claims 1 to 4, wherein the lateral plate of the auxiliary reinforcing steel material is attached to the flange together with the lateral plate of the reinforcing steel material by the bolt. 前記補助補強鋼材と、前記フランジ又は前記鋼管柱との間にスペーサを介在させる請求項５記載の既存建物の柱梁接合部の補強工法。The method for reinforcing a beam-to-column joint of an existing building according to claim 5, wherein a spacer is interposed between the auxiliary reinforcing steel material and the flange or the steel pipe column.
JP2003117813A 2003-04-23 2003-04-23 Reinforcement method of beam-column joint of existing building Expired - Fee Related JP3574824B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103174222A (en) * 2013-03-11 2013-06-26 同济大学 Steel casting modularization panel point for connection of steel pipe column and H-shaped beam
CN104234181A (en) * 2013-12-26 2014-12-24 福建鑫晟钢业有限公司 Steel building product and combination method thereof
CN106988432A (en) * 2017-04-25 2017-07-28 江苏沪宁钢机股份有限公司 A kind of stable type rod iron node

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JPH09184301A (en) * 1995-12-19 1997-07-15 Kazuhiko Kasai Dimensional matching for bolt joint between beam and pillar in steel framework structure
JP2002004438A (en) * 2000-06-23 2002-01-09 Shimizu Corp Method of joining steel column
JP2003056058A (en) * 2001-08-10 2003-02-26 Nkk Corp Connecting structure of steel pipe column and beam, its connecting method and splice plate used for it

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103174222A (en) * 2013-03-11 2013-06-26 同济大学 Steel casting modularization panel point for connection of steel pipe column and H-shaped beam
CN104234181A (en) * 2013-12-26 2014-12-24 福建鑫晟钢业有限公司 Steel building product and combination method thereof
CN104234181B (en) * 2013-12-26 2016-08-24 福建鑫晟钢业有限公司 A kind of steel building products and combinations thereof method
CN106988432A (en) * 2017-04-25 2017-07-28 江苏沪宁钢机股份有限公司 A kind of stable type rod iron node

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