JP2004027655A

JP2004027655A - Column-beam joint part intersecting method for building steel structure

Info

Publication number: JP2004027655A
Application number: JP2002185616A
Authority: JP
Inventors: Masakatsu Uchida; 内田　昌克; Shunji Iwago; 岩郷　俊二; Tadao Nakagome; 中込　忠男
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-26
Filing date: 2002-06-26
Publication date: 2004-01-29
Anticipated expiration: 2022-06-26
Also published as: JP3789402B2

Abstract

PROBLEM TO BE SOLVED: To solve problems that a column-beam joint part has a complicated structure, there are dangers of the occurrence of a stress concentration and distortion, increase of the manufacturing man-hours, and the like in the column-beam joint part of a building steel frame heretofore manufactured by jointing a column and a beam by welding to a square mortar block manufactured by combining short steel pipes with diaphragms. SOLUTION: A rectangular steel pipe column and H-shape steel beams are passed through each other, or using two parallel steel plates as a substitute beam instead of the H-shape steel beam, the rectangular steel pipe column and the beams are passed through each other to intersect the beams inside the column. A backing strip is supplied from the outer surface, and taking large welding throat depth, the column and the beam are directly welded and jointed. The die including a diaphragm of small assembly is thereby omitted, and intermediate assembly of jointing the square mortar block and beams can be omitted to sharply reduce applied material and the amount of welding the column and further to reduce the occurrence of stress concentration and distortion and the embrittlement of a thermally affected part. COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、建築鉄骨構造物の柱梁接合部において、Ｈ形鋼梁又は２枚の平行した鋼板を対とする梁を角形鋼管柱に貫通させ、角形鋼管柱の内部で交差させて、建築鉄骨構造物を製作する技術の方法に関するものである。
【０００２】
【従来の技術】
従来の技術では、建築鉄骨構造物の柱梁接合部は図１に示すように、鋼板によるダイアフラム１と短い角形鋼管２との間で溶接６を施すことによりサイコロを形成させ、このサイコロとＨ形鋼梁フランジ４を溶接接合７し、更に、該サイコロと角形鋼管柱５とを溶接接合して構成する事が多い。この従来の技術では、図２に示すように、サイコロの角形鋼管２とダイアフラム１との溶接６及びサイコロのダイアフラム１とＨ形鋼梁フランジ４の溶接７は裏当金１０を用いて片側溶接で実施されている。このダイアフラム１と梁フランジ４との従来溶接方法では、フランジ４の接合予定端部の開先加工をしてから、裏当金１０の製作及び裏当金取付の仮付溶接８を行い、本溶接７を実施している。また、ダイアフラム１と角形鋼管２又は５との溶接も角形鋼管２又は５の接合予定端部の開先加工をしてから、裏当金１０の製作及び裏当金取付の仮付溶接８を行いダイアフラム１と角形鋼管２又は５との本溶接６を実施している。
【０００３】
一方、特願平１０−２０４８２８では、図３に示すように、鋼管柱５へのコンクリート充填性を良くすると共に、梁を柱に容易に接合できる梁と柱の接合方法が公開されている。本方法は、柱５に貫通する第１プレート１２及び第２プレート１３をコンクリート充填が容易なようにそれぞれ一枚ずつ鉛直に立てて貫通させ、図４に示すように、梁３Ｃのウエブ９とボルト接合２０され該第１プレート１２及び第２プレート１３は柱５に直接溶接接合がなされていない。図４に示すように、梁３Ｃを柱５に接合させるために、梁３Ｃに水平スティフナー１４を溶接で取付けてからこのスティフナーを介して梁３Ｃが柱５に溶接接合される。
【０００４】
【発明が解決しようとする課題】
従来の建築鉄骨柱梁接合部では、殆どが図１で示すサイコロで製作されており、サイコロを介して柱と梁が溶接接合されており、柱５は階毎に角形鋼管の切断と溶接がなされる。従来の方法では、図２に示すように、ダイアフラム１・角形鋼管２・裏当金１０・エンドタブ等部材数が多く、溶接６は角形鋼管２の周囲に一周しており溶接量が多い。そのため、部品製作コストが掛かると共に、サイコロ製作後ダイアフラム端部が折れ曲がり、いわゆる傘折れ現象が起きて、ダイアフラムと梁フランジとの間で目違いが起こりやすいと言う問題がある。また、裏当金１０を角形鋼管２の端部内周に取付け仮付溶接８を行うのは手間とコストが掛かる。また、角形鋼管２とダイアフラム１の溶接６を全周に亘って行うため、溶接量が多いので溶接残留応力が大きくなるだけでなく、裏当金１０を用いると裏当金１０と部材１、２、４及び５との間で切り欠きが出来て応力集中が発生し、強度を弱める結果となる。
【０００５】
一方、特願平１０−２０４８２８では、図３に示すように、Ｈ形鋼梁３Ｃに係る荷重はＨ形鋼梁ウエブ９からプレート１２又は１３を介して柱５に掛かるが、一本のＨ形鋼梁３Ｃに対してフランジ無しの１枚の鉛直プレートであり、該プレートと柱本体とは溶接接合されておらず、しかも、柱５内のプレート１２と１３の交差部は交差用の溝又は切り欠きがあり、Ｈ形鋼梁フランジ４は柱５への荷重伝達にほとんど寄与していない。従って、Ｈ形鋼梁３Ｃと角形鋼管柱５との接合部の強度は軸荷重・鉛直曲げ・側方曲げ・ねじりに対し十分ではない。また、図４では、この強度不足を補うため、梁フランジ４の側面にスティフナー１４を取付けて、該スティフナー１４を介して角形鋼管柱５にＨ形鋼梁フランジ４を溶接接合させている。この場合でも、Ｈ形鋼梁３Ｃの荷重を受ける角形鋼管柱５の内部が空洞又はコンクリート充填であり、梁フランジ４の引張又は曲げ荷重に対し、柱５の側壁が大きく耐えることができず、地震等でＨ形鋼梁３Ｃに掛かる種々の荷重に対し角形鋼管柱５で十分受け止めることができない。プレート１２及び１３はＨ形鋼梁一本に対し１枚であり、更に、角形鋼管柱５のプレート１２及び１３の角形鋼管柱５への貫通部に溶接がなされていないので、Ｈ形鋼梁３Ｃに係る荷重は角形鋼管柱５に該プレートを介して荷重が伝達されず、角形鋼管柱５側面には孔が開いた状態であり、角形鋼管柱５に掛かる曲げ荷重及び圧縮荷重に対し、角形鋼管柱５の強度は低下するという問題がある。一方、Ｈ形鋼梁フランジ４に該スティフナーを取り付ける場合は、該スティフナーの材料と製作が必要になってコストアップの要因となる。
【０００６】
【目的】
本発明は、建築鉄骨構造物の柱梁接合部において、構造を単純化することにより、応力集中を緩和して溶接接合部強度を向上させると共に、溶接接合部の溶接量を軽減して製作コストを低減させることを目的とする。
【０００７】
【課題を解決するための手段】
このような諸課題を解決する目的で、先ず溶接量を軽減するためにダイアフラムを省略することを第一に研究したが、この場合、角形鋼管柱内部は空洞なので強度が不足するため問題である。そこで、種々研究した結果、角形鋼管柱の梁接続箇所に梁断面形状に似せて開けた貫通孔に短いＨ形鋼梁を挿入させるとともに該Ｈ形鋼梁を該角形鋼管柱から突出させながら、互いに直角方向から貫通する短いＨ形鋼梁を角形鋼管柱内部で交差させて、且つ、該Ｈ形鋼梁と該角形鋼管柱とを溶接接合した上で、該柱を貫通する短いＨ形鋼梁と柱間中央Ｈ形鋼梁をボルト接合すれば鉄骨構造建築が可能であり、その結果、ダイアフラムを省略しても梁に掛かる荷重は十分角形鋼管柱に伝達されることを見いだした。
【０００８】
該短いＨ形鋼梁の代わりに、長いＨ形鋼梁を角形鋼管柱の梁接続箇所に開けた貫通孔に挿入し溶接接合すれば、柱間中央の溶接接合又はボルト接合箇所を減らすことを可能であることも見いだした。
【０００９】
また、少なくとも一つの該短いＨ形鋼梁の代わりに、水平で平行な２枚で一対の鋼板で置き換えて、角形鋼管柱の梁接続箇所に開けた貫通孔にそれぞれ挿入させて、該鋼板の対による梁同士を角形鋼管柱内部で交差させた上で、総ての貫通梁と該角形鋼管柱とを溶接接合させて、角形鋼管柱の外側でそれぞれの貫通梁を柱間中央のＨ形鋼梁フランジと溶接接合又はボルト接合して鉄骨構造物を製作すれば、Ｈ形鋼梁を角形鋼管柱に貫通させるよりも容易となり、ダイアフラムを省略しても梁に掛かる荷重は十分角形鋼管柱に伝達されることを見いだした。
【００１０】
そこで、請求項１に係る発明では、建築鉄骨構造物の柱梁接合部において、発明の構成は先ず、角形鋼管柱の梁接続予定箇所に梁の断面形状に似せて開けた貫通孔に、複数のＨ形鋼梁を挿入させることであり、次の構成は、該角形鋼管柱に互いに直角方向から貫通するＨ形鋼梁を該角形鋼管柱内部で交差させることであり、次の構成は、該Ｈ形鋼梁と該角形鋼管柱と直接溶接接合することであり、これら構成により、Ｈ形鋼梁を柱内部で交差させて鉄骨構造物製作する方法である。本方法を用いれば、ダイアフラムを省略しても、梁が角形鋼管柱を貫通し且つ溶接されているので、梁に掛かる荷重は十分角形鋼管柱に伝達される。本発明の新規性は、ダイアフラムを省略させてＨ形鋼梁そのものを該梁断面形状に似せて角形鋼管柱に開けた貫通孔に貫通させることと、該角形鋼管柱と貫通させた総ての該梁とを直接溶接接合させることなどで強固な柱梁接合部を得ることにある。
【００１１】
請求項２に係る発明は、建築鉄骨構造物の柱梁接合部において、発明の構成は先ず、少なくとも梁の一つを比較的短くて水平で平行な２枚の鋼板の対とすることであり、次の構成は、角形鋼管柱の所定の梁接続箇所に該梁断面形状に似せて開けた貫通孔に、Ｈ形鋼梁又は水平で平行な２枚の鋼板の対からなる梁を含めた総ての梁を挿入させることにあり、次の構成は、該鋼板の対の梁と柱を貫通させた他方の梁とを該角形鋼管柱の内部で交差させることであり、次の構成は、柱を貫通させた総ての梁と該角形鋼管柱とを溶接接合させることであり、更に次の構成は、該角形鋼管柱の外側で少なくとも該鋼板の対の梁と柱間中央のＨ形鋼梁とを溶接接合又はボルト接合することであり、又は、該貫通梁と該柱間中央Ｈ形鋼梁下側フランジとをボルト接合する操作と、該柱間中央梁上側フランジ端部裏面に肉盛溶接して開先加工をしたのち該貫通梁と溶接接合する操作とを組み合わせことである。これら構成により、該鋼板の対の梁とＨ形鋼梁を、又は、該鋼板の対の梁同士を柱内部で交差させて鉄骨構造物製作する方法である。本発明に係る方法では、請求項１に係る方法において角形鋼管柱を貫通するＨ形鋼梁の少なくとも１本に対し、比較的短くて水平で平行な２枚を一対とする鋼板梁で置き換えることを特徴としている。該鋼板梁は該角形鋼管柱内で他の梁と交差した場合にその端部が角形鋼管柱から突出し、該一対の鋼板梁の上下間隔は柱間中央のＨ形鋼梁せいの程度とし、該鋼板梁の左右方向幅は特に制限はないが通常は該Ｈ形鋼梁フランジの幅程度とし、該鋼板梁の板厚は該Ｈ形鋼梁フランジの肉厚よりも通常は大きくする。本発明の新規性は、ダイアフラムを省略させてＨ形鋼梁そのものを角形鋼管柱に貫通させ溶接接合させることと、Ｈ形鋼梁を一対の水平で平行な２枚の鋼板の梁で置き換えて角形鋼管柱と貫通させた総ての梁とを直接溶接接合させることなどにある。角形鋼管柱内の梁の交差部は少なくとのフランジ部分は連続しており、角形鋼管柱及び梁に対する外的荷重に対し十分な強度を有することも特長である。
【００１２】
請求項１及び請求項２に係る発明において、角形鋼管柱と該角形鋼管柱を貫通する短い梁との接合で完全溶け込みの突合せ溶接を該角形鋼管柱の外面から片側溶接で安定して実施する場合に、材料の寸法精度があまり良くないので該開口部の該角形鋼管柱の内面側に裏当金を宛う必要があり、請求項３に係る発明は、発明の構成は先ず、角形鋼管柱の側面の所定位置に梁の断面形状及び本数に合わせた開口部又は溶接開先を付けた開口部を設けて、該開口部に該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させることであり、次の構成は、該角形鋼管柱の外側から該開口部を通じて該開口部の該角形鋼管柱の内面側に溶接熱で溶融される細いワイヤ又は箔を用いて裏当金を挿入してセットすることであり、これら構成により、該角形鋼管柱と該梁を該角形鋼管柱の外側から片側溶接する方法である。本発明の新規性は、該角形鋼管柱に該梁を貫通させて角形鋼管柱の内部で梁を交差させ柱梁を互いに直接突合せ溶接する点に加えて、該突合せ溶接時に、該角形鋼管柱の外側から該開口部を通じて、該開口部の該角形鋼管柱の内面側に溶接熱で溶融される細いワイヤ又は箔を用いて裏当金を挿入してセットすることである。
【００１３】
請求項１及び請求項２に係る発明において、角形鋼管柱と該角形鋼管柱を貫通する短い梁との接合で裏当金を省略すると溶接施工性が格段に良くなるので、請求項４に係る発明は、発明の構成はまず、角形鋼管柱の側面の所定位置に梁の断面形状及び本数に合わせた開口部又は溶接開先を付けた開口部を設けて、該開口部に該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させることであり、次の構成は、両者を該角形鋼管柱の外面から片側溶接ですみ肉溶接するか又は部分溶け込み突合せ溶接する場合に、該角形鋼管柱と該梁とを母材よりも強度の高い溶接材料ですみ肉溶接又は部分溶け込み溶接を行うことであり、更に次の構成では、溶接時に、該柱肉厚の１０％以上大きいのど厚を確保することである。本発明の新規性は、柱と梁を交差させた柱梁接合部構造と母材よりも高い強度の溶接材料ですみ肉溶接又は部分溶け込み溶接を行うこととを組み合わせることであり、更に、これらの溶接において角形鋼管柱肉厚の１０％以上大きいのど厚を確保することなどである。即ち、柱と梁を交差させた柱梁接合部構造の製作において、溶接作業性を向上させ継手強度を確保するため、すみ肉溶接又は部分溶け込み溶接において高強度溶接材料と大きいのど厚を採用することに特徴がある。
【００１４】
請求項１、及び、２に係る記載の発明において、裏当金を省略しても突合せ溶接を可能にするため、請求項５に係る発明は、発明の構成はまず、角形鋼管柱の側面に梁の断面形状及び本数に合わせた開口部を設けて、次の構成は、該角形鋼管柱側に開先加工を行うことであり、次の構成は、開先近傍を加熱して開先部及びその近傍を該角形鋼管柱の内面方向へ曲げ加工を行うことであり、次の構成は、該開口部に該梁を挿入し複数の梁を角形鋼管柱の内部で交差させることであり、更に、次の構成は、該角形鋼管柱肉厚の１０％以上大きいのど厚を確保して、角形鋼管柱と梁とを角形鋼管柱の外側から片側溶接することである。本発明の新規性は、柱と梁とを交差させた柱梁接合部構造と、該角形鋼管柱側に開先加工を行い、開先部とその近傍を加熱して曲げ加工することを組み合わせることにあり、更に、これらの溶接において該角形鋼管柱肉厚の１０％以上大きいのど厚を溶接接合で確保することなどである。
【００１５】
請求項１及び請求項２に係る発明において、角形鋼管柱と該角形鋼管柱を貫通する短い梁との接合で完全溶け込みの突合せ溶接を実施する際に、該角形鋼管柱の外面から片側溶接を実施する必要があり、請求項６に係る発明では、発明の構成は先ず、角形鋼管柱の側面に梁の断面形状及び本数に合わせた開口部又は溶接開先を付けた開口部を設けて、該開口部にそれぞれ該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させることであり、次の構成は、該開口部の該角形鋼管柱の内面側に裏当金を当てて、角形鋼管柱側において表側の溶接ビード止端部の位置が裏面の溶接ルート部の位置より該角形鋼管柱肉厚の８０％以上離れて位置するように溶接させることであり、更に次の構成では、少なくとも裏面の溶接ビード幅の領域における表ビード余盛り高さが少なくとも該角形鋼管柱肉厚の１０％以上確保され余盛りが母材表面から滑らかに変化するようにすることであり、これら構成により、該角形鋼管柱と該梁とを該角形鋼管柱の外側から片側溶接する方法である。本発明の新規性は、該角形鋼管柱に該梁を貫通させて角形鋼管柱の内部で梁を交差させ柱梁を互いに直接突合せ溶接する点に加えて、該溶接部のビード幅を広げ且つ余盛り高さをより高くして継手ルート部の応力集中を軽減して溶接継手強度を増加させる点などにある。
【００１６】
【発明の実施の形態】
実施例１
請求項１に係る発明の方法では、建築鉄骨構造物の柱梁接合部において、図６に示すように、角形鋼管柱５の側面にＨ形鋼梁の断面形状に似せて開けた貫通の開口部１７をガス切断、プラズマ切断、レーザ切断等によりＨ形鋼梁の取付予定位置に設け、次に、図５の立体図に示すように、角形鋼管柱５の梁接続箇所に開けた図６に示す貫通孔１７に複数のＨ形鋼梁３を挿入させて該角形鋼管柱５の内部で交差させ、該角形鋼管柱５と該Ｈ形鋼梁３とを突合せ溶接又はすみ肉溶接による接合を行い、鉄骨構造物を製作する方法である。本方法によれば、梁せいが異なる場合３階分の柱を切断せず１本で製作することが可能になる。
【００１７】
実施例２
請求項１に係る発明の方法において、互いに直交する同じ梁せいを持つＨ形鋼梁はそのままでは角形鋼管柱内部で立体交差が難しく平面交差しかできない。その場合、請求項１に係る発明の方法では、図７に示すように、一方のＨ形鋼梁３Ａを長手方向に２本に分けたものとし、角形鋼管柱５の梁接続予定箇所に開けた貫通孔にそれぞれ挿入させて角形鋼管柱５の内部で他の貫通Ｈ形鋼梁３と溶接２１した上で総ての貫通Ｈ形鋼梁３及び３Ａと該角形鋼管柱５とを溶接接合１５させて、鉄骨構造物を製作する。
【００１８】
実施例３
請求項１に係る発明の方法において、互いに直交する同じせいを持つＨ形鋼梁を立体交差させる方法の一つを図８に示す。図８では、一方のＨ形鋼梁３Ｂをその長手方向の中央部でウエブを除去して角形鋼管柱５の貫通孔を通して挿入して、他方のＨ形鋼梁３を角形鋼管柱５の貫通孔を通して除去したウエブ部分にフランジ部分４Ａの強制的変形により交差させる方法である。この場合、一方のＨ形鋼梁フランジ４はフランジ４Ａのように上下に曲げられるが、他方のＨ形鋼梁３の交差前に、Ｈ形鋼梁３Ｂのウエブを除去した部分のフランジを予め加熱しておく方法も有効である。本実施例の場合、交差部で梁同士の溶接を角形鋼管柱内で行う必要がないので、同じ一つの角形鋼管柱でＨ形鋼梁を複数階に渡り取り付けることが可能になる。本方法によれば、梁せいが同じでも、３階分の柱を切断せず１本で製作することが可能になる。
【００１９】
実施例４
請求項１に係る発明の方法において、互いに直交する同じせいを持つＨ形鋼梁が柱から２方向にしか梁がのびていない場合を平面交差させる方法の一つを図９に示す。この場合は、角形鋼管柱内で梁同士を溶接接合２１し、少なくとも一つの梁は柱の両方の側面を貫通させる。
【００２０】
実施例５
請求項１に係る発明の方法において、角形鋼管柱に貫通する複数のＨ形鋼梁のせいが異なる場合は、図１０に示すように、せいの高い方のＨ形鋼梁３Ｂをその長手方向の中央部で小さい方のＨ形鋼梁が通るようにウエブを除去して角形鋼管柱５の貫通孔を通して挿入して、せいの小さい他方のＨ形鋼梁３を角形鋼管柱５の貫通孔及びウエブ除去したＨ形鋼梁を貫通させて、交差させる方法である。本実施例の場合、交差部で梁同士の溶接を角形鋼管柱内で行う必要がないので、同じ一つの角形鋼管柱でＨ形鋼梁を複数階に渡り取り付けることが可能になる。
【００２１】
実施例６
請求項１に係る発明の方法において、角形鋼管柱５に貫通させるＨ形鋼梁３の長さを比較的短い寸法とすれば、図５に示すように貫通梁の端部にボルト孔１６を開け、柱間のＨ形鋼中央梁とボルト接合することが可能である。また、この貫通梁を長くすれば柱間の中央梁を省略することが可能になる。
【００２２】
実施例７
請求項２に係る発明の方法において、図１１及び図１２では、梁の一つを水平で平行な２枚で一対の鋼板の梁１８とし、他方をＨ形鋼梁３として、角形鋼管柱５の梁接続箇所に開けた図１５に示す貫通孔１７と１７Ａにそれぞれ梁１８及び３を挿入させて、該鋼板の対の梁１８と他方の梁３とを該角形鋼管柱の内部で交差させ、総ての貫通梁１８及び３と、該角形鋼管柱５とを溶接接合１５させて、鉄骨構造物を製作する方法を示し、更に、角形鋼管柱５の外側で該貫通梁１８を柱間中央Ｈ形鋼梁フランジ４と溶接接合１９して鉄骨構造物を製作する方法を示す。該貫通梁１８を柱間中央Ｈ形鋼梁フランジ４と溶接接合する場合、図１１に示すすみ肉前面溶接の他に、該貫通梁１８を柱間中央Ｈ形鋼梁フランジ４とを側面溶接を実施すれば更に強力な継手が得られる。なお、梁１８は、ウエブが無いためＨ形鋼梁３のフランジ４の肉厚よりも通常肉厚を大きくするか又は強度を高くすることも該梁の強度又は剛性を確保する上で有効である。本方法によれば、柱間の梁の梁せいが同じでも３階分の柱を１本で製作することが可能になる。
【００２３】
実施例８
実施例７における該貫通梁１８と柱間中央Ｈ形鋼梁フランジ４との溶接接合の代りに、図１２及び図１４のボルト孔１６を利用して、図１３及び図１４に示すように、ボルト接合２０を用いても良い。該ボルト接合２０の場合は、溶接のように建設現場における天候の影響を受けにくいという特長がある。
【００２４】
実施例９
請求項２に係る発明の方法において、図１７では、梁の２方向共に、水平で平行な２枚で一対の鋼板の梁１８及び１８Ａとし、角形鋼管柱５の梁接続箇所に開けた図１６に示す貫通孔１７Ａに梁１８及び１８Ａを挿入させて、該鋼板の対の梁１８及び１８Ａを該角形鋼管柱の内部で交差させ、貫通梁１８及び１８Ａと、該角形鋼管柱５とを溶接接合１５させた立体図を示し、図１７の２枚で一対の鋼板の梁１８の端部に取り付けたボルト接合用の孔１６を用いれば、図１４と同様に、角形鋼管柱５の外側で該貫通梁１８及び１８Ａと柱間中央Ｈ形鋼梁フランジ３Ｃとをボルト接合２０して鉄骨構造物を製作できる方法を示す。
【００２５】
実施例１０
請求項２に係る発明の方法において、図１８は、２方向とも水平で平行な２枚の鋼板の対を梁１８及び１８Ａとして、該２対の梁１８と１８Ａのせい高さを同じにして、角形鋼管柱５を貫通させた場合の上面図である。この場合、該２対の梁１８及び１８Ａは角形鋼管柱５内部で平面交差するので、梁同士１８及び１８Ａの溶接接合２１を行う。
【００２６】
実施例１１
請求項２に係る発明の方法において、図１９は、２方向とも水平で平行な２枚の鋼板の対を梁１８及び１８Ａとして、該２対の梁１８と１８Ａのせい高さを同じにして、梁１８及び１８Ａを角形鋼管柱５に貫通させ、角形鋼管柱内で２対の鋼板梁１８と１８Ａを立体交差させた場合の横断面図であり、２対の梁１８と１８Ａのうち、１対の梁の厚さ１８は他方の梁１８Ａよりも大きくして他方の梁１８Ａを立体交差させるだけの溝を作り立体交差させる。そして、２対の梁１８及び１８Ａはそれぞれ角形鋼管柱と溶接接合され、それぞれ柱間中央梁３Ｃとボルト接合又は溶接接合される。梁１８は機械加工で中央に溝を製作して梁１８Ａを通しているが、梁１８を溶接して製作しても同様の効果を得ることができる。本方法によれば、柱間の梁の梁せいが同じでも３階分の柱を切断せず１本で製作することが可能になる。
【００２７】
実施例１２
請求項２に係る発明の方法において、図２０は、２方向とも水平で平行な２枚で一対とする鋼板をそれぞれ梁１８及び１８Ａとして、該２対の梁１８と１８Ａのせいが互いに異なって、角形鋼管柱５を貫通させた場合の角形鋼管柱内部交差方法の横断面図であり、２対の梁１８及び１８Ａはそれぞれ角形鋼管柱と溶接接合され、それぞれ柱間中央梁３Ｃとボルト接合又は溶接接合される方法を示す。本方法によれば、梁せいが異なる場合でも３階分の柱を切断せず１本で製作することが可能になる。
【００２８】
実施例１３
請求項２に係る発明の方法において、図２１は、少なくとも一方が水平で平行な２枚を一対とする鋼板の梁１８で、梁３と梁１８同士が角形鋼管柱にそれぞれ貫通しその内部で交差し、２枚を一対とする鋼板の梁１８と柱間の中間のＨ形鋼梁３Ｃを角形鋼管柱５の外でボルト接合２０及びフランジ裏面肉盛後肉盛部を含めて開先加工し突合せ溶接１５した場合を示す。図２１では、柱間中央梁３Ｃをガセットプレート２２でボルトにより仮止めして梁１８と梁３Ｃのフランジ４の下側同士をボルト締めし、しかる後、図２２に示すように、フランジ端部裏面を肉盛溶接２３した後、梁フランジ４を開先加工し突合せ溶接２４し、梁１８と梁３Ｃを接合させる。このように、接合させれば、建設現場のおける請求項２の施工が極めて容易になる。
【００２９】
実施例１４
請求項２に係る発明の別の実施方法は、図２３に示すように、少なくとも一方が水平で平行な２枚を一対とする鋼板の梁１８で、梁３と１８同士が角形鋼管柱にそれぞれ貫通しその内部で交差し、２枚を一対とする鋼板の梁１８と柱間の中間のＨ形鋼梁３Ｃを角形鋼管柱５の外でボルト接合２０している例であり、図２３の右側では、梁１８とＨ形鋼梁３Ｃとが突き合わせで、これらをスプライスプレート３０で挟み込んでボルト接合させている。図２３の左側では、スプライスプレートを用いていないが、スプライスプレート３０を用いて施工した方が梁同士の製作精度が良くない場合には作業性が良くて施工上有効である。
【００３０】
実施例１５
請求項３に係る発明方法において、図２４は、裏当金１０に溶接熱で溶融される金属箔２６を取り付けた状態を示し、図２５は金属箔２６を裏当金１０に取り付け金属箔２６を一時的に折り曲げた状態を示しており、この図２５に示す状態で、図２６に示すように、金属箔２６を取り付けた裏当金１０を継手開先のギャップから挿入し、挿入完了すれば、図２７に示すように、金属箔の弾性で図２５の元の状態に戻り、裏当金１０が柱５の裏側にセットされ、この状態で柱５及び梁４Ｆと仮付け溶接した後、柱外面から継手を片側溶接で施工すれば柱梁接合部ができあがる。ここで用いる金属箔２６の厚さは２００μｍ以下が適当である。また、金属箔の変わりに、溶接熱で溶融される細いワイヤでも同様な効果が得られる。
【００３１】
実施例１６
請求項３に係る発明方法において、図３０は環状の裏当金１０に溶接熱で溶融される細い金属ワイヤ２９を取り付けた状態を示し、角形鋼管柱５の側面に図６、図１５及び図１６に示すように梁の断面形状及び本数に合わせた開口部又は溶接部分開先を付けた開口部から、該金属ワイヤ２９を把持して裏当金１０を挿入し、該開口部内面にセットし、図３１に示すように、該梁４Ｆを該角形鋼管柱開口部及び環状裏当金１０の開口部に挿入して、角形鋼管柱５の内面にセットする。そして、該柱５、該梁４Ｆ及び該裏当金１０を仮付してから継手溶接を実施する。
【００３２】
実施例１７
請求項４に係る発明方法において、角形鋼管柱５の側面に図６、図１５及び図１６に示すように梁の断面形状及び本数に合わせた開口部又は溶接部分開先を付けた開口部を設けて、該開口部に該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させ、図２８に示すように該角形鋼管柱５と該梁４Ｆとを母材よりも強度の高い溶接材料を用いて、すみ肉溶接２７を実施するか、又は、図２９に示すように部分溶け込み溶接２７を突合せ溶接とすみ肉溶接の組み合わせで行い、該柱肉厚５Ｔの１０％以上、望むらくは１５％以上で２５％以下の大きいのど厚２５Ａを確保して、角形鋼管柱と梁を角形鋼管柱の外側から片側溶接する方法である。
【００３３】
実施例１８
請求項５に係る記載の発明において、角形鋼管柱５の側面に図６、図１５及び図１６に示すように梁の断面形状及び本数に合わせた開口部又は溶接部分開先を付けた開口部を設けて、図３２に示すように、該角形鋼管柱側５に開先加工２８を行ったのち、開先近傍をガス、高周波、レーザ等により加熱して開先部２８及びその近傍を該角形鋼管柱の内面方向へハンマー、プレス等により曲げ加工を行い、該開口部に該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させ、該角形鋼管柱５の肉厚５Ｔの１０％以上、望むらくは１５％以上で２５％以下の大きいのど厚２５を確保して、該角形鋼管柱５と梁４Ｆを該角形鋼管柱５の外側から片側溶接する。本発明に係る方法では、突合せ溶接のほかに、突合せ溶接とすみ肉溶接の組み合わせで大きいのど厚を確保することも可能である。
【００３４】
実施例１９
請求項６に係る記載の発明において、角形鋼管柱５の側面に図６、図１５及び図１６に示すように梁の断面形状及び本数に合わせた開口部又は溶接部分開先を付けた開口部を設けて、該開口部に該梁を挿入し複数の梁を該角形鋼管柱の内部で交差させ、図３３に示すように、該開口部の該角形鋼管柱の内面側に裏当金１０を当てて、角形鋼管柱側５において表側の溶接ビード止端部の位置１５Ｔが裏面の溶接ルート部の位置１０Ａより角形鋼管柱肉厚５Ｔの８０％以上離れて位置するように溶接され且つ少なくとも裏面の溶接ビード幅１５Ａの領域における表ビード余盛り高さ１５Ｈが少なくとも該角形鋼管肉厚５Ｔの１０％以上確保され余盛りが母材表面から滑らかに変化するように、該角形鋼管柱５と該梁３を角形鋼管柱５の外側から片側溶接する。本方法によれば、実効のど厚が１０％以上大きく確保され望むらくは１５％以上で２５％以下確保され、しかも、裏面の裏当金１０の応力集中部１０Ａによる応力集中が、余盛り高さが大きいことと余盛り位置１５Ｔが該角形鋼管肉厚５Ｔの８０％以上離れて、望むらくは１００％以上で１５０％以下離れていることにより緩和され、引張力５Ｃ及び曲げモーメント５Ｂに対し、母材以上の十分な継手強度を確保することが可能である。
【００３５】
実施例２０
請求項１から６において、柱梁接合部を製作した後、柱内部にコンクリートを充填することも可能である。
【発明の効果】
本発明による効果は、従来方法に比較し次の通りである。
１．　請求項１については、従来方法のダイアフラムが無く、従って、サイコロが無く、３階分の柱をまとめて製作できるため、小組み立て工程の省略だけでなく、中組み立ての省略ができる為、工程が簡略化され、工期の短縮と工場の省スペースが可能になる。また、従来方法に比較して溶接量が大幅に減少するので溶接歪みが少なくなる。
２．　請求項２については、請求項１の発明の効果のほかに、梁の柱への貫通が簡略かつ容易になり、柱間の中央梁の取り付けも容易になる。
３．　請求項３については、請求項１及び２の方法の実施において、裏当金を容易にセットすることができる。
４．　請求項４については、請求項１及び２の方法の実施において、裏当金を省略し継手の開先加工を簡略化し、柱梁接合部の製作が容易になる。
５．　請求項５については、請求項１及び２の方法の実施において、裏当金を省略し突合せ溶接を容易にして、継手強度を裏当金方式の継手よりも高くすることができる。
６．　請求項５については、請求項１及び２の方法の実施において、裏当金を使用しても継手ルート部の応力集中を軽減して溶接継手強度を増加させる点などにある。
【図面の簡単な説明】
【図１】従来の角形鋼管柱を用いた柱梁接合部の立体図
【図２】従来の角形鋼管を用いた柱梁接合部の断面図
【図３】角形鋼管柱に第１プレート及び第２プレートを挿入した断面図
【図４】角形鋼管柱に第１プレート及び第２プレートを挿入し梁にスティフナーを取り付けて角形鋼管柱に溶接接合する断面図
【図５】角形鋼管柱・Ｈ形鋼梁相互貫通型の柱梁接合部の立体図
【図６】角形鋼管柱のＨ形鋼梁貫通用孔を示す立体図
【図７】Ｈ形鋼梁同士のせいが同一の場合の柱・梁相互貫通型の柱梁接合部の上面図
【図８】Ｈ形鋼梁同士のせいが同一の場合の角形鋼管柱内での梁の交差を示す正面図
【図９】梁同士のせいが同一で２方向にしか梁がのびていない場合の柱・梁相互貫通型の柱梁接合部の上面図
【図１０】梁同士のせいが異なる場合の角形鋼管柱内の梁の交差を示す正面図
【図１１】一方が水平で平行な２枚を一対とする鋼板の梁で、他方がＨ形鋼梁の双方が角形鋼管柱に貫通しその内部で交差し、柱貫通の梁と柱間の中央梁と梁せいが同じで、２枚を一対とする鋼板の梁と柱間の中間のＨ形鋼梁を柱の外で溶接接合した場合の正面図
【図１２】図１１の上面図
【図１３】一方が水平で平行な２枚を一対とする鋼板の梁で、他方がＨ形鋼梁の双方が角形鋼管柱に貫通しその内部で交差し、柱貫通の梁と柱間の中央梁と梁せいが同じで、２枚を一対とする鋼板の梁と柱間の中間のＨ形鋼梁を柱の外でボルト接合した場合の正面図
【図１４】図１３の上面図
【図１５】Ｈ形鋼梁及び２枚を一対とする鋼板の梁１本に対する角形鋼管柱の貫通孔を示す立体図
【図１６】Ｈ形鋼梁及び２枚を一対とする鋼板の梁２本に対する角形鋼管柱の貫通孔を示す立体図
【図１７】２方向とも水平で平行な２枚の鋼板の対を梁として角形鋼管柱を貫通させた場合の外観図
【図１８】２方向とも水平で平行な２枚の鋼板の対を梁として、該２対の梁の高さを同じにして、角形鋼管柱を貫通させた場合の上面図
【図１９】２方向とも水平で平行な２枚の鋼板の対を梁として、該２対の梁のせい高さを同じにして、角形鋼管柱を貫通させ、角形鋼管柱内で２対の鋼板梁を立体交差させた場合の横断面図
【図２０】２方向とも水平で平行な２枚で一対とする鋼板を梁として、直交する梁のせいが異なる場合に、角形鋼管柱を貫通させた場合の角形鋼管柱内部交差方法の横断面図
【図２１】少なくとも一方が水平で平行な２枚を一対とする鋼板の梁で、梁同士が角形鋼管柱に貫通しその内部で交差し、２枚を一対とする鋼板の梁と柱間の中間のＨ形鋼梁を柱の外でボルト接合及びフランジ裏面肉盛後開先加工し突合せ溶接した場合の正面図
【図２２】開先予定部端部裏面に肉盛溶接して肉盛部を含めて開先加工して、継手溶接した場合の横断面図
【図２３】水平で平行な２枚で一対とする鋼板を梁として用い、柱外面に突出した部分を柱間中央の梁とボルト接合した場合の横断面図
【図２４】金属箔を裏当金に取り付けた状態の断面図
【図２５】金属箔を裏当金に取り付け金属箔を折り曲げた状態の断面図
【図２６】金属箔を取り付けた裏当金を継手開先のギャップから挿入する状態の断面図
【図２７】金属箔を取り付けた裏当金を継手開先のギャップから挿入して開先裏面にセットした状態の断面図
【図２８】梁フランジ４と柱５とを高強度溶接材料ですみ肉溶接した状態の断面図
【図２９】柱５に部分開先を取り、梁フランジ４と柱５とを高強度溶接材料で部分溶け込み溶接した状態の断面図
【図３０】環状の裏当金に細い金属ワイヤを取り付けた状態
【図３１】環状の裏当金に細い金属ワイヤを取り付けて、該裏当金を柱内面にセットして梁又は梁フランジを挿入した状態
【図３２】柱開先先端部を加熱し柱内面側に曲げ加工して、柱肉厚以上の開先深さを得て、柱肉厚以上の実効のど厚を得る方法の説明断面図
【図３３】表側ビード幅を広げた場合の継手形状の横断面図
【符号の説明】
１　建築鉄骨柱梁接合部のダイアフラム
１Ａ　ダイアフラムの傘折れ状態
２　ダイアフラム間の角形鋼管。１と２から構成される部材をサイコロという。
３　Ｈ形鋼梁
３Ａ　長手方向に分割した場合のＨ形鋼梁
３Ｂ　長手方向の中央部でウエブを除去したＨ形鋼梁
３Ｃ　柱間の中央梁
３Ｔ　柱間の中央梁のフランジ肉厚
４　Ｈ形鋼梁フランジ
４Ａ　Ｈ形鋼梁で上下に広げられたフランジ
４Ｆ　Ｈ形鋼梁、Ｈ形鋼梁フランジ、及び、２枚を一対とする鋼板の梁の総称
５　角形鋼管による柱
５Ａ　角形鋼管による柱の辺の長さ
５Ｂ　曲げモーメント
５Ｃ　引張力
５Ｐ　円形鋼管による柱
５Ｔ　角形鋼管による柱の肉厚
６　角形鋼管とダイアフラムとの溶接
７　梁フランジとダイアフラムとの溶接
８　仮付又は組立溶接
９　Ｈ形鋼梁ウエブ
１０　裏当金
１１　スカラップ
１２　プレート１
１３　プレート２
１４　水平スティフナー
１５　角形鋼管柱と梁との溶接
１５Ａ　裏ビード幅
１５Ｂ　裏ビード止端部からの表ビード延長長さ
１５Ｈ　裏ビード止端部位置における表ビードの高さ
１５Ｔ　表ビード延長部の止端部
１６　ボルト接合用の孔
１７　Ｈ形鋼梁貫通用の角形鋼管柱側面の開口部
１７Ａ　２枚を一対とする鋼板の梁貫通用の角形鋼管柱側面開口部
１８　水平で平行な２枚で一対の鋼板梁
１８Ａ　水平で平行な２枚で一対のもう一つの鋼板梁
１９　水平で平行な２枚で一対の鋼板梁と柱間中央梁との溶接
２０　ボルト接合
２１　角形鋼管柱内の梁交差部の溶接
２２　ガセットプレート
２３　肉盛溶接
２４　突合せ溶接
２５　実効のど厚
２５Ａ　のど厚
２６　金属箔
２７　高強度すみ肉溶接
２８　開先
２９　金属ワイヤ
３０　スプライスプレート[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a beam-to-column joint of a building steel structure, in which an H-shaped steel beam or a beam made of two parallel steel plates is penetrated through a rectangular steel pipe column and crosses inside the rectangular steel pipe column to form a building. The present invention relates to a method of manufacturing a steel structure.
[0002]
[Prior art]
In the prior art, as shown in FIG. 1, a column-beam joint of a building steel structure is formed by applying a weld 6 between a diaphragm 1 made of a steel plate and a short rectangular steel pipe 2 to form a die. In many cases, the steel beam flange 4 is welded and joined, and the die and the square steel pipe column 5 are welded and joined. In this conventional technique, as shown in FIG. 2, a welding 6 between a square steel pipe 2 of a die and a diaphragm 1 and a welding 7 between a diaphragm 1 of a die and an H-shaped steel beam flange 4 are performed by one-side welding using a backing metal 10. It has been implemented in. In the conventional welding method of the diaphragm 1 and the beam flange 4, a beveling process is performed on an end to be joined of the flange 4, and then a backing metal 10 is produced and a tack welding 8 for attaching the backing metal is performed. Welding 7 is performed. The welding between the diaphragm 1 and the rectangular steel pipe 2 or 5 is also performed by forming a groove at the end of the rectangular steel pipe 2 or 5 to be joined, and then the temporary welding 8 for producing the backing metal 10 and attaching the backing metal. The main welding 6 between the diaphragm 1 and the square steel pipe 2 or 5 is performed.
[0003]
On the other hand, Japanese Patent Application No. 10-204828 discloses a method of joining a beam and a column, which can improve the filling property of concrete into a steel pipe column 5 and can easily join the beam to the column, as shown in FIG. In this method, the first plate 12 and the second plate 13 penetrating through the column 5 are vertically erected one by one so as to facilitate concrete filling, and as shown in FIG. The first plate 12 and the second plate 13 are bolted and not directly welded to the column 5. As shown in FIG. 4, in order to join the beam 3C to the column 5, a horizontal stiffener 14 is attached to the beam 3C by welding, and then the beam 3C is welded to the column 5 via the stiffener.
[0004]
[Problems to be solved by the invention]
Most of the conventional building steel beam-column joints are made of dice as shown in FIG. 1, and the columns and beams are welded and joined via the dice. Done. In the conventional method, as shown in FIG. 2, the number of members such as the diaphragm 1, the square steel pipe 2, the backing metal 10, and the end tabs is large, and the welding 6 is rounded around the square steel pipe 2, so that the welding amount is large. For this reason, there is a problem that the cost of manufacturing parts increases, and the end of the diaphragm is bent after the dice is manufactured, so that a so-called umbrella breaking phenomenon occurs, and misalignment is likely to occur between the diaphragm and the beam flange. In addition, it is troublesome and costly to attach the backing metal 10 to the inner periphery of the end portion of the rectangular steel pipe 2 and perform the temporary welding 8. Further, since the welding 6 of the square steel pipe 2 and the diaphragm 1 is performed over the entire circumference, the welding amount is large, so not only the welding residual stress is increased, but also if the backing metal 10 is used, the backing metal 10 and the member 1, Notches are formed between 2, 4, and 5, and stress concentration occurs, resulting in reduced strength.
[0005]
On the other hand, in Japanese Patent Application No. Hei 10-204828, as shown in FIG. 3, the load on the H-shaped steel beam 3C is applied to the column 5 from the H-shaped steel web 9 via the plate 12 or 13; One vertical plate without a flange with respect to the section steel beam 3C, the plate and the column main body are not welded and joined, and the intersection of the plates 12 and 13 in the column 5 is a crossing groove. Alternatively, there is a notch, and the H-shaped steel beam flange 4 hardly contributes to load transmission to the column 5. Therefore, the strength of the joint between the H-shaped steel beam 3C and the square steel tubular column 5 is not sufficient against axial load, vertical bending, lateral bending, and torsion. In FIG. 4, in order to compensate for the insufficient strength, a stiffener 14 is attached to the side surface of the beam flange 4, and the H-shaped steel beam flange 4 is welded to the rectangular steel pipe column 5 via the stiffener 14. Even in this case, the inside of the rectangular steel pipe column 5 receiving the load of the H-shaped steel beam 3C is hollow or filled with concrete, and the side wall of the column 5 cannot withstand the tensile or bending load of the beam flange 4 greatly, Various loads applied to the H-shaped steel beam 3C due to an earthquake or the like cannot be sufficiently received by the rectangular steel tube columns 5. The plates 12 and 13 are one for each H-shaped steel beam, and furthermore, the welding of the rectangular steel tube columns 5 to the penetration portions of the plates 12 and 13 to the rectangular steel tube columns 5 is not performed. With respect to the load relating to 3C, the load is not transmitted to the rectangular steel pipe column 5 via the plate, and a hole is opened in the side surface of the rectangular steel pipe column 5. There is a problem that the strength of the rectangular steel tube column 5 is reduced. On the other hand, when the stiffener is attached to the H-shaped steel beam flange 4, the material and production of the stiffener are required, which causes an increase in cost.
[0006]
【Purpose】
SUMMARY OF THE INVENTION The present invention simplifies the structure of a beam-to-column joint of a building steel structure, alleviates stress concentration and improves the strength of a welded joint, and reduces the amount of welding at the welded joint to reduce manufacturing costs. It aims at reducing.
[0007]
[Means for Solving the Problems]
In order to solve these problems, we first studied to omit the diaphragm in order to reduce the amount of welding, but in this case, it is a problem because the inside of the square steel tube column is hollow and lacks strength. . Therefore, as a result of various studies, while inserting a short H-shaped steel beam into a through hole opened to resemble the beam cross-sectional shape at the beam connection point of the square steel tube column, while projecting the H-shaped steel beam from the square steel tube column, A short H-shaped steel beam penetrating through the H-beam and the H-shaped steel column are welded and joined to each other by crossing short H-shaped steel beams penetrating from the perpendicular direction to each other inside the square steel column. We found that if a beam and a central H-shaped steel beam between columns were bolted together, it would be possible to build a steel structure, and as a result, even if the diaphragm was omitted, the load applied to the beam would be sufficiently transmitted to the square steel column.
[0008]
If instead of the short H-shaped steel beam, a long H-shaped steel beam is inserted into the through hole opened at the beam connection point of the square steel tubular column and welded, the number of welded joints or bolted joints at the center between the columns can be reduced. I found that it was possible.
[0009]
Further, instead of at least one of the short H-shaped steel beams, two horizontal and parallel steel beams are replaced with a pair of steel plates, and inserted into the through holes opened at the beam connection points of the rectangular steel tube columns, respectively. After the beams by the pair cross each other inside the rectangular steel pipe column, all the penetrating beams and the rectangular steel pipe columns are welded to each other, and each of the penetrating beams outside the rectangular steel pipe columns is H-shaped at the center between the columns. If a steel structure is manufactured by welding or bolting to a steel beam flange, it becomes easier than making an H-shaped steel beam penetrate a rectangular steel column, and even if the diaphragm is omitted, the load applied to the beam is sufficiently large. Found to be transmitted to
[0010]
Therefore, in the invention according to claim 1, in the column-beam joint of the building steel structure, the configuration of the invention firstly includes a plurality of through-holes opened in the beam connecting portions of the square steel tubular column in a manner similar to the cross-sectional shape of the beam. The next configuration is to intersect the H-shaped steel column that penetrates the rectangular steel column in a direction perpendicular to each other inside the rectangular steel column, and the following configuration is The method is a method of directly welding and joining the H-shaped steel beam and the square steel tubular column. With this configuration, the H-shaped steel beam is crossed inside the column to manufacture a steel structure. With this method, even if the diaphragm is omitted, the load applied to the beam is sufficiently transmitted to the rectangular steel tube column because the beam penetrates the rectangular steel tube column and is welded. The novelty of the present invention is that the diaphragm is omitted and the H-shaped steel beam itself is made to penetrate through the through hole formed in the rectangular steel pipe column in a manner similar to the beam cross-sectional shape, and all of the H-shaped steel column is made to penetrate the rectangular steel pipe column. An object of the present invention is to obtain a strong column-beam joint by directly welding and joining the beam.
[0011]
According to a second aspect of the present invention, in the column-beam joint of a building steel structure, at least one of the beams is a pair of two relatively short, horizontal and parallel steel plates. In the following configuration, an H-shaped steel beam or a beam composed of a pair of two parallel steel plates is included in a through hole formed at a predetermined beam connecting portion of a rectangular steel tubular column so as to resemble the cross-sectional shape of the beam. All the beams are to be inserted, and the next configuration is to intersect the paired beams of the steel plate and the other beam penetrating the column inside the rectangular steel tube column, and the next configuration is And welding all the beams penetrating the column and the square steel tube column, and the next configuration is that at least a pair of beams of the steel plate and H at the center between the columns outside the square steel tube column. Welding or bolting the section steel beam, or connecting the through beam and the lower flange of the center H-section steel beam between the columns. Operation and to bets bonding is that combining the operation of welding the feedthrough beam After the GMA process with overlay welding to the central beam upper flange end back surface between the pillar. With these configurations, a steel frame structure is manufactured by making a pair of beams of the steel plate and an H-shaped steel beam or a pair of beams of the steel plate cross each other inside the column. In the method according to the present invention, in the method according to claim 1, at least one of the H-shaped steel beams penetrating the rectangular steel tubular column is replaced by a relatively short, horizontal and parallel pair of steel beams. It is characterized by. When the steel plate beam intersects with another beam in the rectangular steel tube column, its end protrudes from the rectangular steel tube column, and the vertical interval between the pair of steel plate beams is set to the extent of the H-shaped steel beam at the center between the columns, The width in the left-right direction of the steel beam is not particularly limited, but is usually about the width of the H-beam flange, and the thickness of the steel beam is usually larger than the thickness of the H-beam flange. The novelty of the present invention is that the diaphragm is omitted, the H-shaped steel beam itself is penetrated through the square steel pipe column and welded and joined, and the H-shaped steel beam is replaced by a pair of horizontal and parallel steel plate beams. There is a direct welding connection between a rectangular steel pipe column and all the beams penetrated. At least the flange portion is continuous at the intersection of the beams in the rectangular steel pipe column, and is characterized by having sufficient strength against an external load on the rectangular steel pipe column and the beam.
[0012]
In the invention according to claim 1 and claim 2, the butt welding of complete penetration is stably performed by one-side welding from the outer surface of the rectangular steel pipe column by joining the rectangular steel pipe column and a short beam penetrating the rectangular steel pipe column. In this case, since the dimensional accuracy of the material is not very good, it is necessary to apply a backing metal to the inner surface side of the square steel pipe column in the opening. An opening corresponding to the cross-sectional shape and the number of beams or an opening with a welding groove is provided at a predetermined position on the side surface of the column, and the beam is inserted into the opening and a plurality of beams are inserted into the inside of the square steel tube column. The next configuration is to use a thin wire or foil that is melted by welding heat from the outside of the rectangular steel pipe column through the opening to the inner surface side of the rectangular steel pipe column at the opening. This is to insert and set gold. The as the beams is a method of one side welding from outside of the angular-shaped steel column. The novelty of the present invention is that, in addition to the point that the beam is made to penetrate the rectangular steel pipe column, the beam intersects inside the rectangular steel pipe column and the column beam is directly butt-welded to each other, From the outside through the opening, and inserting and setting a backing metal using a thin wire or foil which is melted by welding heat to the inner surface side of the rectangular steel tube column of the opening.
[0013]
In the invention according to claim 1 and claim 2, if the backing metal is omitted at the joint between the rectangular steel pipe column and the short beam penetrating the rectangular steel pipe column, the welding workability is remarkably improved. According to the invention, first, an opening is provided at a predetermined position on the side surface of the square steel tubular column at a predetermined position on the side face of the beam and an opening is provided with a welding groove in accordance with the sectional shape and the number of the beam, and the beam is inserted into the opening. A plurality of beams are crossed inside the rectangular steel pipe column, and the next configuration is such that when both are welded by one side welding from the outer surface of the rectangular steel pipe column or partially welded by butt welding. This is to perform fillet welding or partial penetration welding of the square steel tube column and the beam with a welding material having a strength higher than that of the base material. It is to secure the thickness. The novelty of the present invention is to combine a column-beam joint structure in which a column and a beam intersect with performing fillet welding or partial penetration welding with a welding material having a higher strength than the base material. In such welding, a throat thickness greater than 10% of the wall thickness of the square steel pipe column is secured. That is, in the manufacture of a beam-column joint structure in which a column and a beam intersect, in order to improve welding workability and secure joint strength, a high-thickness welding material and a large throat thickness are employed in fillet welding or partial penetration welding. It has a special feature.
[0014]
In the inventions according to the first and second aspects, in order to enable butt welding even if the backing metal is omitted, the invention according to the fifth aspect is configured such that first, the configuration of the invention is provided on the side surface of the square steel tubular column. The next configuration is to provide an opening in accordance with the cross-sectional shape and the number of the beams, and to perform groove processing on the square steel pipe column side. And the vicinity thereof is to bend in the direction of the inner surface of the rectangular steel pipe column.The next configuration is to insert the beam into the opening and intersect a plurality of beams inside the rectangular steel pipe column, Further, the next configuration is to secure the throat thickness of at least 10% of the thickness of the rectangular steel pipe column and to weld the rectangular steel pipe column and the beam to one side from the outside of the rectangular steel pipe column. The novelty of the present invention combines a column-beam joint structure in which a column and a beam intersect, and performing groove processing on the square steel tube column side and heating and bending the groove portion and its vicinity. In addition, in these weldings, a throat thickness larger than 10% or more of the thickness of the rectangular steel pipe column is secured by welding.
[0015]
In the invention according to claim 1 and claim 2, when performing butt welding of complete penetration at the joining of the square steel pipe column and the short beam penetrating the square steel pipe column, one-side welding is performed from the outer surface of the square steel pipe column. In the invention according to claim 6, the configuration of the invention firstly provides an opening with a cross-sectional shape and the number of beams or an opening with a welding groove on the side surface of the square steel tubular column, The beam is inserted into each of the openings, and a plurality of beams are crossed inside the rectangular steel pipe column. The next configuration is to apply a backing metal to an inner surface of the rectangular steel pipe column of the opening. The welding is performed so that the position of the weld bead toe on the front side is located at least 80% of the thickness of the square steel tube column from the position of the welding root portion on the back surface on the square steel tube column side, and In the table, at least in the area of the weld bead width on the back The extra height of the metal pipe is at least 10% or more of the thickness of the square steel tube column, and the extra height changes smoothly from the surface of the base material. Is welded on one side from the outside of the square steel tubular column. The novelty of the present invention is to increase the bead width of the welded portion in addition to the fact that the beam is penetrated through the rectangular steel column, the beam is crossed inside the rectangular steel column and the column and beam are directly butt-welded to each other, and Another point is that the height of the welded joint is increased by increasing the extra height to reduce the stress concentration at the joint root.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Example 1
In the method according to the first aspect of the present invention, as shown in FIG. 6, a through-opening is formed at a column-to-beam joint of a building steel structure on the side surface of a rectangular steel pipe column 5 so as to resemble the sectional shape of an H-shaped steel beam. The portion 17 is provided at a position where the H-shaped steel beam is to be mounted by gas cutting, plasma cutting, laser cutting, or the like, and then, as shown in a three-dimensional view of FIG. A plurality of H-shaped steel beams 3 are inserted into the through holes 17 shown in FIG. 3 and cross each other inside the square steel tube columns 5, and the square steel tube columns 5 and the H-shaped steel beams 3 are joined by butt welding or fillet welding. And producing a steel structure. According to this method, when the beams are different, it is possible to manufacture the pillars for three stories with one without cutting.
[0017]
Example 2
In the method according to the first aspect of the present invention, an H-shaped steel beam having the same beam crossing at right angles to each other is difficult to make a three-dimensional intersection inside a rectangular steel tube column and can only make a plane intersection. In this case, in the method according to the first aspect of the present invention, one H-shaped steel beam 3A is divided into two in the longitudinal direction as shown in FIG. Each of the H-shaped steel beam columns 3 and 3A is welded to the other H-shaped steel beam columns 3 and 3A, and then welded to the other H-shaped steel beam columns 3 and 3A. 15 to produce a steel structure.
[0018]
Example 3
FIG. 8 shows one of the methods of three-dimensionally crossing H-shaped steel beams having the same fault, which are perpendicular to each other, in the method according to the first aspect of the present invention. In FIG. 8, one H-shaped steel beam 3B is inserted through the through hole of the square steel pipe column 5 after removing the web at the center in the longitudinal direction, and the other H-shaped steel beam 3B is inserted through the square steel pipe column 5. This is a method in which the web portion removed through the hole is crossed by the forced deformation of the flange portion 4A. In this case, one H-shaped steel beam flange 4 is bent up and down like the flange 4A, but before the other H-shaped steel beam 3 intersects, the flange of the portion of the H-shaped steel beam 3B from which the web has been removed is previously formed. Heating is also effective. In the case of this embodiment, since it is not necessary to weld the beams at the intersection in the rectangular steel pipe column, it becomes possible to attach the H-shaped steel beam to a plurality of floors with the same rectangular steel pipe column. According to this method, even if the beams are the same, it is possible to manufacture the pillars for three stories with one without cutting.
[0019]
Example 4
FIG. 9 shows one method of crossing planes in the case where the H-shaped steel beams having the same fault, which are orthogonal to each other, extend from the column only in two directions in the method according to the first aspect of the present invention. In this case, the beams are welded together 21 in a rectangular steel tube column, at least one beam penetrating both sides of the column.
[0020]
Example 5
In the method according to the first aspect of the present invention, when the plurality of H-shaped steel beams penetrating through the rectangular steel tubular column are different from each other, as shown in FIG. The web is removed so that the smaller H-shaped steel beam passes through the central portion of the rectangular steel tube column 5 and inserted through the through hole of the square steel tube column 5. And a method of penetrating and crossing the H-shaped steel beam from which the web has been removed. In the case of this embodiment, since it is not necessary to weld the beams at the intersection in the rectangular steel pipe column, it becomes possible to attach the H-shaped steel beam to a plurality of floors with the same rectangular steel pipe column.
[0021]
Example 6
In the method according to the first aspect of the present invention, if the length of the H-shaped steel beam 3 penetrating through the square steel tubular column 5 is set to a relatively short length, a bolt hole 16 is formed at the end of the penetrating beam as shown in FIG. It is possible to open and connect the H-beam center beam between columns with bolts. Further, if this penetrating beam is lengthened, it becomes possible to omit the central beam between the columns.
[0022]
Example 7
In the method of the invention according to claim 2, in FIGS. 11 and 12, one of the beams is a pair of horizontal and parallel beams 18 made of a pair of steel plates, the other is an H-shaped steel beam 3, and The beams 18 and 3 are respectively inserted into the through holes 17 and 17A shown in FIG. 15 opened at the beam connecting portions of FIG. 15 so that the pair of beams 18 of the steel plate and the other beam 3 intersect inside the square steel tube column. A method for manufacturing a steel structure by welding all of the penetrating beams 18 and 3 and the square steel tube column 5 is shown. Further, the penetrating beams 18 are arranged outside the square steel tube column 5 between the columns. A method of manufacturing a steel structure by welding 19 with the central H-shaped steel beam flange 4 will be described. When the penetrating beam 18 is welded to the center H-shaped steel beam flange 4 between the columns, in addition to the fillet front welding shown in FIG. 11, the through beam 18 is laterally welded to the center H-shaped steel beam flange 4 between the columns. By performing the above, a stronger joint can be obtained. In addition, since the beam 18 does not have a web, it is effective to increase the wall thickness or the strength of the flange 4 of the H-shaped steel beam 3 or to increase the strength thereof in order to secure the strength or rigidity of the beam. is there. According to this method, it is possible to manufacture three columns of columns with one column even if the beams between the columns are the same.
[0023]
Example 8
As shown in FIGS. 13 and 14, the bolt hole 16 of FIGS. 12 and 14 is used instead of the welding connection between the through beam 18 and the inter-column center H-shaped steel beam flange 4 in the seventh embodiment. The bolt joint 20 may be used. The bolted joint 20 has a feature that it is hardly affected by the weather at the construction site like welding.
[0024]
Example 9
In the method of the invention according to claim 2, FIG. 17 shows a pair of steel plates 18 and 18A made of a pair of horizontal and parallel beams in two directions of the beams, and FIG. The beams 18 and 18A are inserted into the through-holes 17A shown in FIG. 4 and the beams 18 and 18A of the pair of steel plates cross each other inside the rectangular steel pipe column, and the through beams 18 and 18A and the rectangular steel pipe column 5 are welded. FIG. 17 shows a three-dimensional view in which the joints 15 are joined, and using the bolt joining holes 16 attached to the ends of the pair of steel plate beams 18 in the two sheets in FIG. A method of manufacturing a steel structure by bolt-joining the through beams 18 and 18A and the center H-beam flange 3C between pillars 20 will be described.
[0025]
Example 10
In the method according to the second aspect of the present invention, FIG. 18 shows that two pairs of steel plates that are horizontal and parallel in two directions are beams 18 and 18A, and the heights of the two pairs of beams 18 and 18A are the same. It is a top view at the time of making a square steel pipe pillar 5 penetrate. In this case, since the two pairs of beams 18 and 18A intersect in a plane inside the rectangular steel tube column 5, the beams 18 and 18A are welded to each other.
[0026]
Example 11
In the method according to the second aspect of the present invention, FIG. 19 shows that two pairs of steel plates which are horizontal and parallel in two directions are beams 18 and 18A, and the heights of the two pairs of beams 18 and 18A are the same. , The beams 18 and 18A are penetrated through the rectangular steel pipe column 5, and two pairs of steel plate beams 18 and 18A are cross-sectioned in the rectangular steel pipe column in a three-dimensional manner, and among the two pairs of beams 18 and 18A, The thickness 18 of the pair of beams is made larger than that of the other beam 18A, and a groove is formed so as to make the other beam 18A three-dimensionally intersect. Then, the two pairs of beams 18 and 18A are respectively welded and joined to the square steel tubular columns, and are respectively bolted or welded to the inter-column center beam 3C. The beam 18 has a groove formed at the center by machining and passes through the beam 18A. However, the same effect can be obtained by welding and manufacturing the beam 18. According to this method, even if the beams of the beams between the columns are the same, it is possible to manufacture the columns of three stories by one without cutting.
[0027]
Example 12
In the method according to the second aspect of the present invention, FIG. 20 shows that two steel plates which are horizontal and parallel in two directions are paired as beams 18 and 18A, respectively, and the two pairs of beams 18 and 18A are different from each other. FIG. 3 is a cross-sectional view of the inside of the rectangular steel pipe column when the rectangular steel pipe column 5 is penetrated, and two pairs of beams 18 and 18A are welded to the rectangular steel pipe column, respectively, and bolted to the center beam 3C between the columns. Or a method of welding and joining is shown. According to the present method, even if the beams are different, it is possible to manufacture the pillars for three stories with one without cutting.
[0028]
Example 13
In the method according to the second aspect of the present invention, FIG. 21 shows a steel plate beam 18 in which at least one is a pair of two horizontal and parallel steel plates. An intersecting H-shaped steel beam 3C, which is a pair of steel plates, and a middle H-shaped steel beam 3C between the columns, is formed outside the rectangular steel tube column 5 by bolt joining 20 and beveling work including the cladding after the cladding on the back surface of the flange. The case where butt welding 15 is performed is shown. In FIG. 21, the inter-column center beam 3 C is temporarily fastened with a gusset plate 22 by bolts, and the lower sides of the flanges 4 of the beam 18 and the beam 3 C are bolted to each other. Then, as shown in FIG. After overlay welding 23 on the back surface, beam flange 4 is grooved and butt welded 24 to join beam 18 and beam 3C. By joining in this way, the construction of claim 2 at the construction site becomes extremely easy.
[0029]
Example 14
Another embodiment of the invention according to claim 2 is that, as shown in FIG. 23, at least one of the steel beams 18 is a pair of two steel plates that are horizontal and parallel, and the beams 3 and 18 are each formed into a square steel pipe column. FIG. 23 shows an example in which a beam 18 made of a pair of steel plates and an intermediate H-shaped steel beam 3C between the columns are bolted 20 to the outside of the rectangular steel tube column 5 by penetrating and intersecting the inside thereof. On the right side, the beam 18 and the H-shaped steel beam 3C abut each other, and are sandwiched by the splice plate 30 and joined by bolts. On the left side of FIG. 23, the splice plate is not used, but the work using the splice plate 30 is effective in terms of workability because the workability is good when the fabrication accuracy of the beams is not good.
[0030]
Example 15
24 shows a state in which a metal foil 26 melted by welding heat is attached to the backing metal 10, and FIG. 25 shows a state in which the metal foil 26 is attached to the backing metal 10. 26 is temporarily bent, and in the state shown in FIG. 25, as shown in FIG. 26, the backing metal 10 to which the metal foil 26 is attached is inserted from the gap of the joint groove, and the insertion is completed. For example, as shown in FIG. 27, the metal foil returns to the original state shown in FIG. 25 due to the elasticity of the metal foil, and the backing metal 10 is set on the back side of the column 5 and, in this state, is temporarily welded to the column 5 and the beam 4F. If the joint is constructed from the outer surface of the column by one-sided welding, the beam-column joint is completed. The thickness of the metal foil 26 used here is suitably 200 μm or less. Further, a similar effect can be obtained with a thin wire that is melted by welding heat instead of the metal foil.
[0031]
Example 16
FIG. 30 shows a state in which a thin metal wire 29 which is melted by welding heat is attached to the annular backing metal 10 in the method according to the third aspect, and FIG. 6, FIG. As shown in FIG. 16, the metal wire 29 is gripped from the opening corresponding to the cross-sectional shape and the number of the beams or the opening provided with the welded groove, the backing metal 10 is inserted, and set on the inner surface of the opening. Then, as shown in FIG. 31, the beam 4F is inserted into the opening of the square steel tube column and the opening of the annular backing metal 10 and set on the inner surface of the square steel tube column 5. Then, after temporarily attaching the column 5, the beam 4F and the backing metal 10, the joint welding is performed.
[0032]
Example 17
In the method according to the fourth aspect of the present invention, as shown in FIGS. 6, 15 and 16, the rectangular steel pipe column 5 is provided with an opening or a welded groove with an opening corresponding to the cross-sectional shape and the number of beams as shown in FIGS. The beam is inserted into the opening, and the plurality of beams intersect inside the rectangular steel pipe column. As shown in FIG. 28, the rectangular steel pipe column 5 and the beam 4F are higher in strength than the base material. Either fillet welding 27 is performed using a welding material, or partial penetration welding 27 is performed by a combination of butt welding and fillet welding, as shown in FIG. 29, to obtain 10% or more of the column wall thickness 5T. In other words, it is a method of securing a large throat thickness 25A of 15% or more and 25% or less, and welding the square steel column and the beam to one side from the outside of the square steel column.
[0033]
Example 18
In the invention according to claim 5, an opening in which a side or a welding groove is provided on the side surface of the rectangular steel tubular column 5 according to the cross-sectional shape and the number of the beams as shown in FIGS. As shown in FIG. 32, after the groove processing 28 is performed on the square steel pipe column side 5, the vicinity of the groove is heated by gas, high frequency, laser, or the like, and the groove 28 and its vicinity are heated. Bending is performed by a hammer, a press or the like in the inner surface direction of the rectangular steel pipe column, the beam is inserted into the opening, a plurality of beams are crossed inside the rectangular steel pipe column, and the thickness 5T of the rectangular steel pipe column 5 is reduced. A large throat thickness 25 of 10% or more, desirably 15% or more and 25% or less is secured, and the rectangular steel pipe column 5 and the beam 4F are welded on one side from the outside of the rectangular steel pipe column 5. In the method according to the present invention, in addition to the butt welding, it is also possible to secure a large throat thickness by a combination of the butt welding and the fillet welding.
[0034]
Example 19
In the invention according to claim 6, an opening in which a side or a welding groove is provided on the side surface of the rectangular steel tubular column 5 according to the cross-sectional shape and the number of the beams as shown in FIGS. 33, the beam is inserted into the opening, and the plurality of beams intersect inside the rectangular steel pipe column. As shown in FIG. 33, a backing metal 10 is provided on the inner side of the rectangular steel pipe column of the opening. Is welded so that the position 15T of the weld bead toe on the front side is located at least 80% of the thickness 5T of the rectangular steel pipe column from the position 10A of the welding root part on the back side on the rectangular steel pipe column side 5 and at least. The square steel pipe column 5 and the front bead height 15H in the region of the weld bead width 15A on the back surface are secured so that at least 10% or more of the square steel pipe wall thickness 5T is ensured and the excess fill smoothly changes from the base material surface. The beam 3 is separated from the outside of the square steel Welding to. According to this method, the effective throat thickness is ensured to be as large as 10% or more, preferably from 15% to 25%, and moreover, the stress concentration by the stress concentration portion 10A of the backing metal 10 on the back surface increases the extra height. Is large and the extra height 15T is separated by 80% or more of the rectangular steel pipe wall thickness 5T, and preferably 100% or more and 150% or less. Therefore, it is possible to secure a sufficient joint strength equal to or higher than that of the base material.
[0035]
Example 20
In claims 1 to 6, it is also possible to fill the inside of the pillar with concrete after manufacturing the beam-column joint.
【The invention's effect】
The effects of the present invention are as follows as compared with the conventional method.
1. Regarding claim 1, since there is no diaphragm of the conventional method, and therefore there are no dice and pillars for three floors can be manufactured together, not only the small assembly process but also the middle assembly can be omitted. It is simplified, shortening the construction period and saving space in the factory. Further, the welding amount is greatly reduced as compared with the conventional method, so that welding distortion is reduced.
2. Regarding the second aspect, in addition to the effect of the first aspect, the penetration of the beam into the column is simplified and easy, and the attachment of the center beam between the columns is also easy.
3. According to claim 3, in the implementation of the method of claims 1 and 2, the backing money can be easily set.
4. Regarding claim 4, in the implementation of the method of claims 1 and 2, the backing metal is omitted, the groove preparation of the joint is simplified, and the fabrication of the beam-column joint is facilitated.
5. According to claim 5, in the implementation of the method of claims 1 and 2, the backing metal can be omitted, butt welding can be facilitated, and the joint strength can be made higher than that of the backing-type joint.
6. A fifth aspect of the present invention resides in that in the implementation of the method of the first and second aspects, even when a backing metal is used, the stress concentration at the joint root portion is reduced to increase the strength of the welded joint.
[Brief description of the drawings]
FIG. 1 is a three-dimensional view of a beam-to-column joint using a conventional square steel tubular column.
FIG. 2 is a cross-sectional view of a beam-column joint using a conventional rectangular steel pipe.
FIG. 3 is a cross-sectional view in which a first plate and a second plate are inserted into a square steel pipe column.
FIG. 4 is a cross-sectional view in which a first plate and a second plate are inserted into a rectangular steel pipe column, and a stiffener is attached to the beam and welded to the rectangular steel pipe column.
FIG. 5 is a three-dimensional view of a column-to-column joint of a rectangular steel tube column and an H-shaped steel beam.
FIG. 6 is a three-dimensional view showing a hole for penetrating an H-shaped steel beam in a square steel tubular column.
FIG. 7 is a top view of a column-beam interpenetration type column-beam joint in the case where H-beams have the same fault.
FIG. 8 is a front view showing intersections of beams in a rectangular steel tubular column in a case where H-beams have the same fault.
FIG. 9 is a top view of a column-beam interpenetration type beam-column joint where the beams are the same and the beams extend only in two directions.
FIG. 10 is a front view showing the intersection of beams in a square steel tubular column when the beams are different from each other.
FIG. 11 is a beam of a steel plate having one pair of two horizontal and parallel plates, and the other is both an H-shaped steel beam penetrating a rectangular steel tube column and intersecting inside the column. Front view when the center beam and the beam are the same, and an H-shaped steel beam in the middle between the columns and the column is welded outside the columns
FIG. 12 is a top view of FIG. 11;
FIG. 13 is a diagram showing a steel plate beam having one pair of two horizontal and parallel plates, and the other being an H-shaped steel beam, both of which penetrate and intersect with a rectangular steel tube column, and intersect inside the column. Front view when the center beam and the beam are the same, and an H-shaped steel beam in the middle between the columns and the column is made of two steel plates and bolted outside the columns
FIG. 14 is a top view of FIG.
FIG. 15 is a three-dimensional view showing through-holes of a square steel tube column for one H-shaped steel beam and one steel plate beam made up of two steel beams.
FIG. 16 is a three-dimensional view showing through-holes of a square steel tube column with respect to two H-shaped steel beams and two steel beams having two pairs.
FIG. 17 is an external view of a case in which a pair of two steel plates that are horizontal and parallel in both directions are used as beams to penetrate a rectangular steel pipe column.
FIG. 18 is a top view when a pair of two steel plates that are horizontal and parallel in two directions are used as beams, and the heights of the two pairs of beams are the same, and a rectangular steel pipe column is penetrated.
FIG. 19 shows two pairs of steel plates that are horizontal and parallel in two directions as beams, and the two pairs of beams have the same height, penetrate a rectangular steel pipe column, and form two pairs in the rectangular steel pipe column. Cross section when steel beams are crossed three-dimensionally
FIG. 20 is a cross section of a method of intersecting a rectangular steel pipe column in a case where a rectangular steel pipe column is penetrated in a case where a pair of steel plates is used as a beam in two directions that are horizontal and parallel in two directions, and when the orthogonal beams are different in width. Figure
FIG. 21 shows at least one of two horizontal and parallel beams of a steel plate having a pair of steel plates. Front view of an intermediate H-shaped steel beam outside the column when bolted and flanged backfacing, beveling and butt welding
FIG. 22 is a cross-sectional view of the case where a weld is welded to the back surface of the end portion of the planned groove portion, the groove is processed including the build-up portion, and the joint is welded.
FIG. 23 is a cross-sectional view of a case where a pair of horizontal and parallel steel plates is used as a beam, and a portion protruding from the outer surface of the column is bolted to a beam at the center between columns.
FIG. 24 is a cross-sectional view showing a state where a metal foil is attached to a backing metal.
FIG. 25 is a cross-sectional view showing a state where the metal foil is attached to the backing metal and the metal foil is bent.
FIG. 26 is a cross-sectional view showing a state in which a backing metal with a metal foil attached is inserted from a gap of a joint groove
FIG. 27 is a cross-sectional view of a state in which a backing metal to which a metal foil is attached is inserted from the gap of the joint groove and set on the back surface of the groove.
FIG. 28 is a cross-sectional view of a state in which a beam flange 4 and a column 5 are fillet-welded with a high-strength welding material.
FIG. 29 is a sectional view of a state where a partial groove is formed in the column 5 and the beam flange 4 and the column 5 are partially penetrated and welded with a high-strength welding material.
FIG. 30 shows a state in which a thin metal wire is attached to an annular backing metal.
FIG. 31 shows a state in which a thin metal wire is attached to an annular backing metal, the backing metal is set on the inner surface of the column, and a beam or a beam flange is inserted.
FIG. 32 is an explanatory cross-sectional view of a method of heating a column groove tip and bending the column inner surface side to obtain a groove depth greater than the column thickness to obtain an effective throat thickness greater than the column thickness.
FIG. 33 is a cross-sectional view of the joint shape when the front side bead width is increased.
[Explanation of symbols]
1 Diaphragm of building steel beam-column joint
1A Umbrella broken state of diaphragm
2 Square steel pipe between diaphragms. A member composed of 1 and 2 is called a dice.
3 H-beam
3A H-beam when divided in the longitudinal direction
3B H-shaped steel beam with web removed at center in longitudinal direction
3C Central beam between columns
3T Flange thickness of center beam between columns
4 H-beam flange
4A H-shaped steel beams spread up and down
4F General term for H-beam, H-beam flange, and steel beam with two pairs
5 Column made of square steel pipe
5A Column side length made of square steel pipe
5B bending moment
5C tensile force
Column made of 5P circular steel pipe
Column thickness of 5T square steel pipe
Welding of 6 square steel pipe and diaphragm
7 Welding of beam flange and diaphragm
8 Temporary or assembly welding
9 H-shaped steel beam web
10 Back money
11 Scallop
12 Plate 1
13 Plate 2
14 Horizontal stiffener
15 Welding of steel tubular columns and beams
15A Back bead width
15B Front bead extension length from back bead toe
15H Height of front bead at back bead toe position
15T Front bead extension toe
16 Hole for bolt connection
17 Opening on the side of rectangular steel tube column for penetrating H beam
17A Rectangular steel tube column side opening for beam penetration of two steel plates
18 A pair of horizontal and parallel steel beams
18A A pair of horizontal and parallel two other steel beams
19 Welding of a pair of horizontal and parallel steel beams and a central beam between columns
20 bolt connection
21 Welding of beam intersections in square steel tubular columns
22 Gusset plate
23 Overlay welding
24 Butt welding
25 Effective throat thickness
25A throat thickness
26 Metal foil
27 High strength fillet welding
28 bevels
29 metal wire
30 splice plates

Claims

At the beam-to-column joint of a building steel structure, a plurality of H-shaped steel beams are inserted into through-holes opened at the beam connection points of the rectangular steel tube columns so as to resemble the cross-sectional shape of the beams and cross the inside of the rectangular steel tube columns. Method of manufacturing a steel structure by welding and joining the rectangular steel tubular column and the H-shaped steel beam

At the beam-to-column joint of a building steel structure, at least one of the beams is a pair of two horizontal and parallel steel plates. All the beams are inserted, the pair of beams of the steel plate and the other beam intersect inside the rectangular steel tube column, and all the through beams and the rectangular steel tube column are welded and joined to each other. An operation of bolt-joining or welding-joining the penetrating beam to an inter-column center H-shaped steel beam flange outside the rectangular steel pipe column, or bolt-joining the penetrating beam to the inter-column center H-shaped steel beam lower flange. A method of manufacturing a steel structure by combining the operation of overlay welding on the back surface of the upper end of the upper flange of the inter-column center beam, forming a groove including the overlay, and then welding and joining the through beam.

In the invention according to claims 1 and 2, an opening having a cross-sectional shape and the number of welding beams or an opening provided with a welding groove is provided on a side surface of the rectangular steel tubular column, and the beam is provided at the opening. Insert a plurality of beams to cross the inside of the rectangular steel pipe column, through the opening from the outside of the rectangular steel pipe column to the inner surface side of the rectangular steel pipe column of the opening, a thin wire melted by welding heat or A method of using a foil to provide a backing metal and welding one side of the square tubular column and beam from the outside of the square tubular column

In the invention according to Claims 1 and 2, an opening having a cross-sectional shape and the number of beams or an opening with a welded groove is provided on the side surface of the rectangular steel pipe column, and the opening is provided with the opening. A beam is inserted, a plurality of beams intersect inside the rectangular steel tube column, and the rectangular steel tube column and the beam are subjected to fillet welding or partial penetration welding with a welding material having strength higher than that of the base material, and the column wall is formed. Method to secure the throat thickness of 10% or more of the thickness, and to weld one side of the square tubular column and beam from the outside of the square tubular column

In the invention according to Claims 1 and 2, an opening is provided on the side surface of the rectangular steel tubular column in accordance with the cross-sectional shape and the number of beams, and after the opening is grooved, the vicinity of the groove is formed. Is heated to bend the groove and its vicinity in the direction of the inner surface of the rectangular steel pipe column, insert the beam into the opening, intersect a plurality of beams inside the rectangular steel pipe column, Method to secure the throat thickness greater than 10% of the wall thickness and to weld one side of the square steel tube column and beam from the outside of the square steel tube column

In the invention according to claims 1 and 2, an opening having a cross-sectional shape and the number of welding beams or an opening provided with a welding groove is provided on a side surface of the rectangular steel tubular column, and the beam is provided at the opening. Insert a plurality of beams to intersect inside the rectangular steel pipe column, apply a backing to the inner surface side of the rectangular steel pipe column of the opening, and position the weld bead toe on the front side on the rectangular steel pipe column side. It is welded so as to be located at least 80% of the thickness of the square steel tube column from the position of the welding root portion on the back surface, and at least the extra height of the front bead in the region of the weld bead width on the back surface is at least the thickness of the square steel tube column. Method to weld one side of a square steel tube column and beam from outside of a square steel tube column so that 10% or more of the steel tube is secured and the extra height changes smoothly from the surface of the base material