JP2004027740A - Joint structure of steel pipe for column member - Google Patents

Joint structure of steel pipe for column member Download PDF

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Publication number
JP2004027740A
JP2004027740A JP2002188841A JP2002188841A JP2004027740A JP 2004027740 A JP2004027740 A JP 2004027740A JP 2002188841 A JP2002188841 A JP 2002188841A JP 2002188841 A JP2002188841 A JP 2002188841A JP 2004027740 A JP2004027740 A JP 2004027740A
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JP
Japan
Prior art keywords
steel pipe
short
long
welding
joint structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002188841A
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Japanese (ja)
Inventor
Shin Nakajima
中島 伸
中島 教雄
Hiroshi Nakajima
中島 拓
Norio Nakajima
中島 功雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nakajima Steel Pipe Co Ltd
Original Assignee
Nakajima Steel Pipe Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nakajima Steel Pipe Co Ltd filed Critical Nakajima Steel Pipe Co Ltd
Priority to JP2002188841A priority Critical patent/JP2004027740A/en
Priority to DE2002161604 priority patent/DE10261604B4/en
Priority to MYPI20030045 priority patent/MY130349A/en
Priority to CNB031016790A priority patent/CN1306127C/en
Priority to GB0300937A priority patent/GB2390125B/en
Priority to SG200300127A priority patent/SG108310A1/en
Priority to FR0307887A priority patent/FR2841579B1/en
Publication of JP2004027740A publication Critical patent/JP2004027740A/en
Priority to HK04103409A priority patent/HK1060378A1/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of steel pipe for column member capable of maintaining various advantages of a type adopting a thick-walled short steel pipe, forming a groove part for welding inexpensively by shortening the manufacturing time, and performing connection work by welding more smoothly than in a conventional structure. <P>SOLUTION: This joint structure is composed of a long steel pipe 1 having predetermined plate thickness t and the short steel pipe 2 having larger plate thickness T than that of the long steel pipe 1. Peripheral shapes W, R of the long steel pipe 1 and the short steel pipe 2 are formed into the same shape by hot forming. Both steel pipes 1, 2 are mutually connected by welding 5 from an outer side while an end face 1b of the long steel pipe 1 opposes to an end face 2b of the short steel pipe 2 in which a groove is not formed. Consequently, the steel pipe for the column member maintaining various advantages of the type adopting the thick-walled short steel pipe is constituted. The welding connection work can be smoothly, efficiently, and properly performed always while a step part (irregularity) does not occur because the peripheral shapes are the same, and stress can be favorably transmitted. Since the groove is not formed in the thick-walled short steel pipe, it can be inexpensively formed by shortening the manufacturing time. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、たとえば鉄骨構造物の支柱として使用される柱材用鋼管の継手構造に関するものである。
【0002】
【従来の技術】
従来、支柱として使用される柱材用鋼管として、パネルゾーン用のコラムに、熱間成形により得た厚肉コラムを採用した構成が提供されている。すなわち、たとえば所定の板厚の長尺角形鋼管を冷間成形で製造するとともに、この長尺角形鋼管よりも板厚が厚くかつ梁材連結部を形成する長さの短尺角形鋼管を、加熱炉において加熱したのち熱間成形して製造する。そして、短尺角形鋼管の内側に開先部を形成する。このようにして得た長尺角形鋼管と短尺角形鋼管とをアーク溶接などで結合することで角形鋼管柱を得ていた。
【0003】
このように、熱間成形により得た厚肉コラムを採用した角形鋼管柱によると、たとえば、通しダイヤフラム方式や内ダイヤフラム方式などに比べて、組立て工数を削減できるとともに溶接長さを短くでき、以て全体を簡略化して経済的となり、かつ溶接歪などが生じ難いものにでき、さらに梁材連結部は、短尺角形鋼管の予め厚い板厚によって十分な強度を確保でき、梁材の溶接による結合は何ら支障なく行うことができ、しかも角形鋼管柱はパイプジョイント形式で得られ、内蔵リブや裏当て金などがない状態に仕上げることができて、中にコンクリートなどを充填させる構成も容易に採用できる、などの種々な利点を期待できる。
【0004】
【発明が解決しようとする課題】
しかし、上記した厚肉の短尺角形鋼管を採用した角形鋼管柱によると、溶接のための開先部を、厚肉の短尺角形鋼管の内側に形成することで、その製作に時間がかかり、かつ高価となる。しかも、厚肉の短尺角形鋼管における開先部から所定厚の長尺角形鋼管の内面に亘って裏当て金を位置させた状態で、内部側(裏当て金側)の溶接を行うことで、溶接量が多くなって溶接作業は迅速に行えず、さらに裏当て金として変形(特殊加工)したものが必要となる場合もある。
【0005】
そこで本発明の請求項1は、厚肉の短尺鋼管を採用した形式の種々な利点を維持でき、しかも溶接のための開先部は製作時間を短縮して安価に形成し得、さらに溶接による結合作業を、よりスムースに行える柱材用鋼管の継手構造を提供することを目的としたものである。
【0006】
【課題を解決するための手段】
前述した目的を達成するために、本発明の請求項1記載の柱材用鋼管の継手構造は、所定の板厚の長尺鋼管と、この長尺鋼管よりも板厚が厚い短尺鋼管とからなり、これら長尺鋼管と短尺鋼管とは、熱間成形によって外径形状が同一状に形成され、長尺鋼管の端面と、開先を形成していない短尺鋼管の端面とが対向された状態で、両鋼管を外側からの溶接により結合して構成されていることを特徴としたものである。
【0007】
したがって請求項1の発明によると、長尺鋼管と短尺鋼管とを、その外周形状を同一状として直線状に位置させて、端面どうしを相対向させる。そして、相対向した端面間を外側からの全周に亘っての溶接により結合することで、柱材用鋼管を構成し得る。その際に溶接による結合作業は、外径形状が同一状であることから、段部(目違い)が生じていない状態で、よりスムースに行える。そして厚肉の短尺鋼管は、開先を形成していないことで、その製作時間を短縮して形成し得る。
【0008】
また本発明の請求項2記載の柱材用鋼管の継手構造は、上記した請求項1記載の構成において、長尺鋼管と短尺鋼管とは四角形鋼管からなり、これら長尺四角形鋼管と短尺四角形鋼管とは、熱間成形によって外寸とコーナ部の外周曲面とが同一状に形成されていることを特徴としたものである。
【0009】
したがって請求項2の発明によると、長尺四角形鋼管と短尺四角形鋼管とを、その外周形状を同一状として直線状に位置させて、端面どうしを相対向させる。そして、相対向した端面間を外側からの全周に亘っての溶接により結合することで、柱材用鋼管を構成し得る。その際にコーナ部間の溶接は、対峙した外周曲面が同一状であることから、段部(目違い)が生じていない状態で行える。
【0010】
そして本発明の請求項3記載の柱材用鋼管の継手構造は、上記した請求項1記載の構成において、長尺鋼管と短尺鋼管とは丸形鋼管からなり、これら長尺丸形鋼管と短尺丸形鋼管とは、熱間成形によって外径が同一状に形成されていることを特徴としたものである。
【0011】
したがって請求項3の発明によると、長尺丸形鋼管と短尺丸形鋼管とを、同心状として直線状に位置させたのち、相対向した端面間を外側からの全周に亘っての溶接により結合することで、柱材用鋼管を構成し得る。
【0012】
さらに本発明の請求項4記載の柱材用鋼管の継手構造は、上記した請求項1〜3のいずれかに記載の構成において、短尺鋼管がパネルゾーンを形成する長さであることを特徴としたものである。
【0013】
したがって請求項4の発明によると、長尺鋼管と短尺鋼管とを、その外周形状を同一状として直線状に位置させた状態で、相対向した端面間を外側からの全周に亘っての溶接により結合することで、短尺鋼管をパネルゾーンとした柱材用鋼管を構成し得る。
【0014】
しかも本発明の請求項5記載の柱材用鋼管の継手構造は、上記した請求項1〜4のいずれかに記載の構成において、長尺鋼管の内部に位置させた裏当て金を短尺鋼管の端面に当接させた状態で、両鋼管を外側からの溶接により結合することを特徴としたものである。
【0015】
したがって請求項5の発明によると、溶接による結合作業は、裏当て金を利用した状態で好適に行えるとともに、裏当て金を短尺鋼管の扁平状の端面に当接させることで、溶接量を少なくして迅速に行える。さらに裏当て金としては、特殊加工したものを必要としないことになる。
【0016】
【発明の実施の形態】
以下に、本発明の第1の実施の形態を、四角形の鋼管を採用した状態として、図1〜図8に基づいて説明する。
【0017】
図1に示されるように、所定の板厚tの長尺四角形鋼管(長尺鋼管の一例)1と、この長尺四角形鋼管1の板厚tよりも厚い板厚Tでかつパネルゾーンを形成する長さ(高さ)Lの短尺四角形鋼管(短尺鋼管の一例)2とを有する。ここで所定の板厚tとは、鉄骨構造物の規模に応じて採用される四角形鋼管柱の外寸Wなどにより決定されるもので、たとえば外寸Wが500mmのときに板厚tは25mmである。また長尺四角形鋼管1の板厚tと短尺四角形鋼管2の板厚Tとは、たとえば2t≒Tとされている。
【0018】
そして長尺四角形鋼管1と短尺四角形鋼管2とは、熱間成形によって外径形状、すなわち、その外寸Wと、各コーナ部1A,2Aにおける外周曲面1a,2aの曲率半径R(たとえば0.5T〜1.5Tの曲率半径)が同一状に形成されている。
【0019】
ここで熱間成形は、たとえば図8に示されるように、半成形長尺四角形鋼管11や、パネルゾーンを形成する長さLの半成形短尺四角形鋼管12が加熱手段(加熱炉など)15において加熱され、そして成形手段(成形ロール装置など)16,17において成形することで行われる。このように外径形状を熱間成形することにより、外寸Wと曲率半径Rが同一状に形成された長尺四角形鋼管1と短尺四角形鋼管2が得られる。
【0020】
このようにして製造された長尺四角形鋼管1と短尺四角形鋼管2とのうち、長尺四角形鋼管1は、加工手段(切削加工装置など)18において端部の外側部分が切削加工され、以て端部には、所定角度(35°〜45°)の開先部(端面)1bが形成される。そして、長尺角形鋼管1の端部には、四角リング状の裏当て金3が内嵌されたのち、溶接4により固定されている。なお、短尺四角形鋼管2の端部は、溶接のための開先部を加工しておらず、扁平端面(端面)2bとされており、以て短尺四角形鋼管2は製作時間を短縮して安価に形成し得る。また長尺角形鋼管1は、その開先部1bが外側からの加工であることから、製作時間を短縮して安価に形成し得る。
【0021】
上記のように形成された長尺四角形鋼管1と短尺四角形鋼管2とを、その外周形状を同一状として直線状に位置させたのち、長尺四角形鋼管1の内部に位置させた裏当て金3の外端面3bを、短尺角形鋼管2の扁平端面2bに相当接させる。すなわち、長尺四角形鋼管1の開先部(端面)1bと、開先を形成していない短尺四角形鋼管2の扁平端面(端面)2bとが対向される。
【0022】
そして図2〜図6に示されるように、相対向した開先部1bと扁平端面2b間を、外側から仮り付け溶接したのち、外側からの全周に亘っての溶接(アーク溶接など。)5により結合することで、長尺四角形鋼管1と短尺四角形鋼管2とを外側からの溶接5により結合して、短尺四角形鋼管2をパネルゾーンとして四角形鋼管柱(柱材用鋼管)6を構成し得る。
【0023】
その際に溶接5による結合は、裏当て金3を利用した状態で好適に行える。またコーナ部1A,2A間の溶接5による結合作業は、対峙した外周曲面1a,2aの曲率半径Rが同一状であって、段部(目違い)が生じていないことで、よりスムースに効率良く、常に好適に行える。
【0024】
上記のようにして構成した四角形鋼管柱6は、所定本数が建築現場などに運搬され、そしてパネルゾーンを形成する長さLの短尺四角形鋼管2の外面に、梁フランジまたは梁材7が溶接8によって結合される。なお四角形鋼管柱6は、図2の仮想線に示すように、積上げ状に配置されたのち、その上下間が溶接5により結合されることで、所定長さ(高さ)に構成される。
【0025】
さらに、厚肉の短尺四角形鋼管2を採用した四角形鋼管柱6によると、長尺四角形鋼管1と短尺四角形鋼管2とにおいて、対峙した端部の曲率半径Rが同一状であって、段部(目違い)が生じていないことで、より好適な応力の伝達を可能とし得る。
【0026】
そしてパネルゾーンは、短尺四角形鋼管2の予め厚い板厚Tによって十分な強度を確保し得、梁フランジまたは梁材7の溶接8による結合は何ら支障なく行える。また四角形鋼管柱6はパイプジョイント形式で得られ、内蔵リブや裏当て金などがない状態に仕上げ得る。したがって、中にコンクリートなどを充填させる構成も容易に採用し得る。
【0027】
その際に短尺四角形鋼管2の扁平端面2bから梁フランジまたは梁材7の上下面7bとの間に所定長さ(50〜300mm)lの寸法を取ることにより、パネルゾーンを形成する長さLの短尺四角形鋼管2における上下端の近傍部分にヒンジ作用が発生する効果がある。
【0028】
すなわち新耐震設計法により、柱と梁が接合するパネルゾーン部分が地震力によって降伏しないように規制するか、または降伏を認める場合は、建築物全体のバランスを考えて安全サイドに設計する必要がある。この場合、応力の集中するパネルゾーン部分と、比較的応力の影響が少ない柱との継手方法において、加工が簡単なこの継手構造を用いることにより、地震力によってパネルゾーン近傍でプラスティックヒンジが形成されるとともに、パネルゾーン部分から柱への地震力の伝達がスムーズに行われることに特色がある。
【0029】
上記した実施の形態では、角形鋼管として断面で正四角形状の四角形鋼管1,2を採用しているが、これは断面で長方形の四角形鋼管も同様に採用し得るものである。さらには、正五角形や正六角形など、各種の多角形鋼管にも同様に採用し得るものである。
【0030】
上記した実施の形態では、短尺四角形鋼管2がパネルゾーンを形成する長さLとされているが、この短尺四角形鋼管2の長さは、パネルゾーン以外の使用箇所に応じて任意に設定されるものである。
【0031】
上記した実施の形態では、長尺四角形鋼管1と短尺四角形鋼管2とを溶接5により結合することで、短尺四角形鋼管2をパネルゾーンとして四角形鋼管柱6を構成し、この四角形鋼管柱6を建築現場などに運搬し、そして短尺四角形鋼管2の外面に梁フランジまたは梁材7を溶接8によって結合しているが、これは長尺四角形鋼管1と短尺四角形鋼管2とを建築現場などに運搬し、そして建築現場などにおいて長尺四角形鋼管1と短尺四角形鋼管2とを溶接5により結合することで、短尺四角形鋼管2をパネルゾーンとして四角形鋼管柱6を構成してもよい。
【0032】
また、短尺四角形鋼管2の外面に梁フランジまたは梁材7を溶接8によって結合したのち、建築現場などに運搬してもよい。さらには、短尺四角形鋼管2の外面に、梁フランジまたは梁材7を連結するための連結用プレートを取り付けてもよい。
【0033】
上記した実施の形態において、四角形鋼管1,2としては、たとえば、ロール成形によるワンシーム角形鋼管、プレス成形による一対のみぞ型材を向き合わせて突き合わせ溶接したツーシーム四角形鋼管、一対の圧延みぞ型材を溶接してなるツーシーム四角形鋼管、圧延山型材を一対、向き合わせて溶接したツーシーム四角形鋼管、四面ボックス、シームレス鋼管など、いずれも既製の四角形鋼管が使用される。
【0034】
上記した実施の形態では、エレクトロスラグ溶接機やエレクトロガスアーク溶接機による溶接であり、これによると、短時間で高品質の溶接を行うことができる。なお、レーザなど他の溶接方式であってもよい。
【0035】
以下に、本発明の第2の実施の形態を図9〜図12に基づいて説明する。
すなわち図9に示されるように、所定の板厚tの長尺丸形鋼管(長尺鋼管)21と、この長尺丸形鋼管21の板厚tよりも厚い板厚Tでかつパネルゾーンを形成する長さ(高さ)Lの短尺丸形鋼管(短尺鋼管)22とからなる。これら長尺丸形鋼管21と短尺丸形鋼管22とは、熱間成形によって外径Dが同一状に形成されている。そして、長尺丸形鋼管21は端部の外側部分が切削加工され、以て端部には、所定角度(35°〜45°)の開先部21bが形成される。さらに、長尺丸形鋼管21の端部には、リング状の裏当て金23が内嵌されたのち、溶接24により固定されている。なお、短尺丸形鋼管22の端部は開先を加工しておらず、扁平端面22bとされている。
【0036】
上記のように形成された長尺丸形鋼管21と短尺丸形鋼管22とを、同心状として直線状に位置させたのち、長尺丸形鋼管21の内部に位置させた裏当て金23の外端面23bを、短尺丸形鋼管22の扁平端面22bに相当接させる。すなわち、長尺丸形鋼管21の開先部(端面)21bと、開先を形成していない短尺丸形鋼管22の扁平端面22bとが対向される。
【0037】
そして図10〜図12に示されるように、相対向した開先部21bと扁平端面22b間を、外側から仮り付け溶接したのち、外側からの全周に亘っての溶接(アーク溶接など。)25により結合することで、長尺丸形鋼管21と短尺丸形鋼管22とを外側からの溶接25により結合して、短尺丸形鋼管2をパネルゾーンとして丸形鋼管柱(鋼管柱)26を構成し得る。その際に溶接25による結合は、裏当て金23を利用した状態で好適に行える。
【0038】
【発明の効果】
上記した本発明の請求項1によると、長尺鋼管と短尺鋼管とを、その外周形状を同一状として直線状に位置させて、端面どうしを相対向させたのち、相対向した端面間を外側からの全周に亘っての溶接により結合することで、厚肉の短尺鋼管を採用した形式の種々な利点を維持した柱材用鋼管を構成できる。その際に溶接による結合作業は、外径形状が同一状であることから、段部(目違い)が生じていない状態で、よりスムースに効率良く、常に好適に行うことができるとともに、より好適な応力の伝達を可能にできる。そして厚肉の短尺鋼管は、開先を形成していないことで、その製作時間を短縮して安価に形成できる。
【0039】
また上記した本発明の請求項2によると、長尺四角形鋼管と短尺四角形鋼管とを、その外周形状を同一状として直線状に位置させて、端面どうしを相対向させたのち、相対向した端面間を外側からの全周に亘っての溶接により結合することで、厚肉の短尺四角形鋼管を採用した形式の種々な利点を維持した柱材用鋼管を構成できる。その際に、コーナ部間の溶接による結合作業は、対峙した外周曲面が同一状であって、段部(目違い)が生じていないことで、よりスムースに効率良く、常に好適に行うことができる。
【0040】
そして上記した本発明の請求項3によると、長尺丸形鋼管と短尺丸形鋼管とを、同心状として直線状に位置させたのち、相対向した端面間を外側からの全周に亘っての溶接により結合することで、厚肉の短尺丸形鋼管を採用した形式の種々な利点を維持した柱材用鋼管を構成できる。
【0041】
さらに上記した本発明の請求項4によると、長尺鋼管と短尺鋼管とを、その外周形状を同一状として直線状に位置させた状態で、相対向した端面間を外側からの全周に亘っての溶接により結合することで、短尺鋼管をパネルゾーンとした柱材用鋼管を構成でき、以て厚肉の短尺鋼管を採用した形式の種々な利点を維持できる。
【0042】
しかも上記した本発明の請求項5によると、溶接による結合作業は、裏当て金を利用した状態で好適に行うことができるとともに、裏当て金を短尺鋼管の扁平状の端面に当接させることで、溶接量を少なくして迅速に行うことができる。さらに裏当て金としては、特殊加工したものを必要としないことになる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態を示し、柱材用鋼管の継手構造における四角形鋼管柱の溶接結合前の一部切り欠き斜視図である。
【図2】同柱材用鋼管の継手構造における四角形鋼管柱の縦断正面図である。
【図3】同柱材用鋼管の継手構造における四角形鋼管柱の一部切り欠き斜視図である。
【図4】同柱材用鋼管の継手構造における四角形鋼管柱の平板部における縦断正面図である。
【図5】同柱材用鋼管の継手構造における四角形鋼管柱のコーナ部における縦断正面図である。
【図6】同柱材用鋼管の継手構造における四角形鋼管柱の要部拡大の縦断正面図である。
【図7】同柱材用鋼管の継手構造における四角形鋼管柱の横断平面図である。
【図8】同柱材用鋼管の継手構造における四角形鋼管柱における四角形鋼管の熱間成形などの説明図である。
【図9】本発明の第2の実施の形態を示し、柱材用鋼管の継手構造における丸形鋼管柱の溶接結合前の一部切り欠き斜視図である。
【図10】同柱材用鋼管の継手構造における丸形鋼管柱の縦断正面図である。
【図11】同柱材用鋼管の継手構造における丸形鋼管柱の要部拡大の縦断正面図である。
【図12】同柱材用鋼管の継手構造における丸形鋼管柱の横断平面図である。
【符号の説明】
1  長尺四角形鋼管(長尺鋼管)
1A コーナ部
1a 外周曲面
1b 開先部(端面)
2  短尺四角形鋼管(短尺鋼管)
2A コーナ部
2a 外周曲面
2b 扁平端面(端面)
3  裏当て金
3b 外端面
5  溶接
6  四角形鋼管柱(柱材用鋼管)
7  梁フランジまたは梁材
11  半成形長尺四角形鋼管
12  半成形短尺四角形鋼管
15  加熱手段(加熱炉)
16  成形手段(成形ロール装置)
17  成形手段(成形ロール装置)
18  加工手段(切削加工装置)
21  長尺丸角形鋼管(長尺鋼管)
21b 開先部(端面)
22  短尺丸形鋼管(短尺鋼管)
22b 扁平端面(端面)
23  裏当て金
23b 外端面
25  溶接
26  丸形鋼管柱(柱材用鋼管)
t  所定の板厚
T  厚い板厚
L  パネルゾーンを形成する長さ
W  外寸(外径形状)
R  曲率半径(外径形状)
D  外径(外径形状)
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a joint structure of a steel pipe for a column material used as a column of a steel structure, for example.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been provided a configuration in which a thick column obtained by hot forming is adopted as a column for a panel zone as a steel pipe for a column material used as a column. That is, for example, a long rectangular steel pipe having a predetermined thickness is manufactured by cold forming, and a short rectangular steel pipe having a thickness greater than that of the long rectangular steel pipe and having a length forming a beam connecting portion is formed by a heating furnace. And then hot forming. Then, a groove is formed inside the short rectangular steel pipe. The rectangular steel pipe column was obtained by joining the long rectangular steel pipe and the short rectangular steel pipe thus obtained by arc welding or the like.
[0003]
As described above, according to the square steel pipe column employing the thick column obtained by hot forming, the number of assembling steps can be reduced and the welding length can be shortened as compared with, for example, the through-diaphragm system and the inner diaphragm system. In addition, the overall structure can be simplified to be economical and less likely to cause welding distortion, etc. In addition, the beam connection can secure sufficient strength with the thick rectangular steel pipe in advance, and the beam is joined by welding. Can be carried out without any problems.In addition, square steel pipe columns can be obtained in the form of pipe joints, and can be finished without built-in ribs and backing metal. Various advantages can be expected.
[0004]
[Problems to be solved by the invention]
However, according to the square steel pipe column adopting the above-described thick-walled short rectangular steel pipe, the groove for welding is formed inside the thick-walled short rectangular steel pipe. It will be expensive. In addition, by welding the inner side (backing metal side) in a state where the backing metal is located from the groove portion of the thick short rectangular steel pipe to the inner surface of the long rectangular steel pipe having a predetermined thickness, Due to the large amount of welding, the welding operation cannot be performed quickly, and in some cases, a deformed (special processing) backing metal is required.
[0005]
Therefore, claim 1 of the present invention can maintain various advantages of the type using a thick short steel pipe, and can shorten the manufacturing time for the groove for welding and can form it at low cost. It is an object of the present invention to provide a joint structure of a steel pipe for a column material, which can perform a joining operation more smoothly.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, a joint structure for a steel pipe for a pillar according to claim 1 of the present invention comprises a long steel pipe having a predetermined plate thickness and a short steel pipe having a plate thickness larger than the long steel pipe. The long steel pipe and the short steel pipe have the same outer diameter formed by hot forming, and the end face of the long steel pipe faces the end face of the short steel pipe that does not form a groove. The steel pipe is characterized in that both steel pipes are connected by welding from the outside.
[0007]
Therefore, according to the first aspect of the present invention, the long steel pipe and the short steel pipe are linearly positioned with the same outer peripheral shape, and the end faces are opposed to each other. Then, by joining the opposed end faces by welding over the entire circumference from the outside, a steel pipe for column material can be formed. At that time, the joining operation by welding can be performed more smoothly without any stepped portion (misalignment) because the outer diameter shapes are the same. And since a thick short steel pipe does not form a groove, it can be formed by shortening the manufacturing time.
[0008]
In the joint structure of the steel pipe for column material according to claim 2 of the present invention, the long steel pipe and the short steel pipe are formed of a square steel pipe in the above-described structure of claim 1, and the long square steel pipe and the short square steel pipe are used. The feature is that the outer dimension and the outer peripheral curved surface of the corner portion are formed in the same shape by hot forming.
[0009]
Therefore, according to the second aspect of the present invention, the long rectangular steel pipe and the short rectangular steel pipe are linearly positioned with the same outer peripheral shape, and the end faces are opposed to each other. Then, by joining the opposed end faces by welding over the entire circumference from the outside, a steel pipe for column material can be formed. At this time, welding between the corner portions can be performed in a state where no stepped portion (misalignment) occurs because the opposed outer peripheral curved surfaces have the same shape.
[0010]
In the joint structure of the steel pipe for column material according to claim 3 of the present invention, the long steel pipe and the short steel pipe are formed of round steel pipes in the configuration of claim 1 described above, and the long round steel pipe and the short steel pipe are used. The round steel pipe is characterized by having the same outer diameter formed by hot forming.
[0011]
Therefore, according to the third aspect of the present invention, the long round steel pipe and the short round steel pipe are positioned concentrically and linearly, and then, welding is performed between the opposed end faces over the entire circumference from the outside. By joining, a steel pipe for column materials can be constituted.
[0012]
Further, the joint structure of the steel pipe for a pillar according to claim 4 of the present invention is characterized in that, in the configuration according to any one of the above-described claims 1 to 3, the short steel pipe has a length forming a panel zone. It was done.
[0013]
Therefore, according to the invention of claim 4, in a state where the long steel pipe and the short steel pipe are linearly positioned with the same outer peripheral shape, welding is performed over the entire circumference from the outside between the opposed end faces. Thus, a steel pipe for column material having a short steel pipe as a panel zone can be formed.
[0014]
Moreover, the joint structure of the steel pipe for a pillar according to the fifth aspect of the present invention is the construction according to any one of the first to fourth aspects, wherein the backing metal positioned inside the long steel pipe is used for the short steel pipe. The two steel pipes are joined by welding from the outside in a state where they are in contact with the end faces.
[0015]
Therefore, according to the invention of claim 5, the joining work by welding can be suitably performed in a state using the backing metal, and the backing metal is brought into contact with the flat end face of the short steel pipe to reduce the welding amount. Can be done quickly. Furthermore, a specially processed backing metal is not required.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 8 in a state in which a square steel pipe is adopted.
[0017]
As shown in FIG. 1, a long rectangular steel pipe (an example of a long steel pipe) 1 having a predetermined thickness t and a panel zone having a thickness T greater than the thickness t of the long rectangular steel pipe 1 are formed. And a short rectangular steel pipe (an example of a short steel pipe) 2 having a length (height) L. Here, the predetermined plate thickness t is determined by the outer dimension W of the square steel tubular column adopted according to the scale of the steel structure, and for example, when the outer dimension W is 500 mm, the plate thickness t is 25 mm. It is. The plate thickness t of the long rectangular steel tube 1 and the plate thickness T of the short rectangular steel tube 2 are, for example, 2t ≒ T.
[0018]
The long rectangular steel pipe 1 and the short rectangular steel pipe 2 are formed into outer diameters by hot forming, that is, the outer dimensions W and the radii of curvature R of the outer curved surfaces 1a, 2a at the respective corners 1A, 2A (for example, 0. The radius of curvature (5T to 1.5T) is the same.
[0019]
Here, in the hot forming, for example, as shown in FIG. 8, a semi-formed long rectangular steel pipe 11 or a semi-formed short rectangular steel pipe 12 having a length L forming a panel zone is heated by a heating means (heating furnace or the like) 15. It is heated and formed by forming in forming means (such as a forming roll device) 16 and 17. By thus hot-forming the outer diameter shape, a long rectangular steel pipe 1 and a short rectangular steel pipe 2 having the same outer dimensions W and the same radius of curvature R are obtained.
[0020]
Of the long rectangular steel pipe 1 and the short rectangular steel pipe 2 manufactured in this manner, the long rectangular steel pipe 1 is subjected to a cutting process at a processing means (a cutting device or the like) 18 at an outer end portion thereof. A groove (end face) 1b having a predetermined angle (35 ° to 45 °) is formed at the end. A rectangular ring-shaped backing metal 3 is internally fitted to an end of the long rectangular steel pipe 1, and is fixed by welding 4. In addition, the end of the short rectangular steel pipe 2 is not formed with a groove for welding and is a flat end face (end face) 2b. Can be formed. Further, since the groove portion 1b is processed from the outside, the long rectangular steel pipe 1 can be formed at a low cost by shortening the manufacturing time.
[0021]
After the long rectangular steel pipe 1 and the short rectangular steel pipe 2 formed as described above are linearly positioned with the same outer peripheral shape, the backing metal 3 is positioned inside the long rectangular steel pipe 1. Is brought into contact with the flat end face 2b of the short rectangular steel pipe 2. That is, the groove portion (end face) 1b of the long rectangular steel pipe 1 and the flat end face (end face) 2b of the short rectangular steel pipe 2 not forming a groove face each other.
[0022]
Then, as shown in FIG. 2 to FIG. 6, after the gap between the opposed groove portion 1b and the flat end surface 2b is tack-welded from the outside, welding is performed over the entire circumference from the outside (such as arc welding). 5, the long rectangular steel pipe 1 and the short rectangular steel pipe 2 are connected by welding 5 from the outside to form a square steel pipe column (steel pipe for column material) 6 with the short rectangular steel pipe 2 as a panel zone. obtain.
[0023]
At that time, the connection by the welding 5 can be suitably performed in a state where the backing metal 3 is used. In addition, the joining work by welding 5 between the corner portions 1A and 2A can be performed more smoothly because the radius of curvature R of the outer peripheral curved surfaces 1a and 2a facing each other is the same and no step (misalignment) occurs. Good and always suitable.
[0024]
A predetermined number of the square steel pipe columns 6 configured as described above are transported to a building site or the like, and a beam flange or a beam member 7 is welded 8 to the outer surface of the short rectangular steel pipe 2 having a length L forming a panel zone. Combined by As shown by the imaginary line in FIG. 2, the quadrangular steel pipe columns 6 are arranged in a stacked shape, and are connected to each other by welding 5 between the upper and lower portions to have a predetermined length (height).
[0025]
Furthermore, according to the square steel pipe column 6 adopting the thick short square steel pipe 2, the long square steel pipe 1 and the short square steel pipe 2 have the same radius of curvature R at the opposed ends, and the step ( Since no misalignment occurs, it is possible to transmit more suitable stress.
[0026]
In the panel zone, a sufficient strength can be ensured by the thick rectangular thickness T of the short rectangular steel pipe 2 in advance, and the connection of the beam flange or the beam member 7 by welding 8 can be performed without any trouble. The square steel pipe column 6 is obtained in the form of a pipe joint, and can be finished without built-in ribs or backing metal. Therefore, a configuration in which concrete or the like is filled therein can be easily adopted.
[0027]
At this time, by taking a dimension of a predetermined length (50 to 300 mm) 1 between the flat end face 2b of the short rectangular steel pipe 2 and the upper and lower surfaces 7b of the beam flange or the beam member 7, a length L for forming a panel zone is obtained. There is an effect that a hinge action is generated in the vicinity of the upper and lower ends of the short rectangular steel pipe 2.
[0028]
In other words, according to the new seismic design method, it is necessary to restrict the panel zone part where the column and beam are joined so that it does not yield due to seismic force, or if it allows yielding, it is necessary to design on the safe side in consideration of the balance of the entire building. is there. In this case, a plastic hinge is formed near the panel zone by seismic force by using this joint structure that is easy to process in the joint method between the panel zone portion where stress is concentrated and the column where the influence of stress is relatively small. Another feature is that the seismic force is smoothly transmitted from the panel zone to the pillar.
[0029]
In the above-described embodiment, square steel pipes 1 and 2 each having a square cross section are adopted as the square steel pipes, but rectangular steel pipes having a rectangular cross section can also be adopted. Furthermore, the present invention can be similarly applied to various polygonal steel pipes such as a regular pentagon and a regular hexagon.
[0030]
In the above-described embodiment, the short rectangular steel pipe 2 has the length L that forms the panel zone. However, the length of the short rectangular steel pipe 2 is arbitrarily set according to the use location other than the panel zone. Things.
[0031]
In the embodiment described above, the rectangular steel pipe 1 is connected to the rectangular steel pipe 2 by welding 5 to form the rectangular steel pipe column 6 with the rectangular steel pipe 2 as a panel zone. It is transported to a site or the like, and a beam flange or a beam member 7 is joined to the outer surface of the short rectangular steel pipe 2 by welding 8, which transports the long rectangular steel pipe 1 and the short rectangular steel pipe 2 to a construction site or the like. Then, at a construction site or the like, the rectangular steel pipe column 6 may be configured by joining the rectangular steel pipe 1 and the rectangular steel pipe 2 to each other by welding 5 by using the rectangular steel pipe 2 as a panel zone.
[0032]
Further, a beam flange or a beam member 7 may be connected to the outer surface of the short rectangular steel pipe 2 by welding 8, and then transported to a building site or the like. Further, a connecting plate for connecting the beam flange or the beam member 7 may be attached to the outer surface of the short rectangular steel pipe 2.
[0033]
In the embodiment described above, as the square steel pipes 1 and 2, for example, a one-seam square steel pipe formed by roll forming, a two-seam square steel pipe formed by butt-welding a pair of grooves formed by press forming, and a pair of rolled grooves are welded. A two-seam square steel pipe, a two-seam square steel pipe in which a pair of rolled angle members are welded face-to-face, a four-sided box, a seamless steel pipe, and the like are all used off-the-shelf square steel pipes.
[0034]
In the above-described embodiment, welding is performed by an electroslag welding machine or an electrogas arc welding machine, and according to this, high-quality welding can be performed in a short time. Note that another welding method such as a laser may be used.
[0035]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.
That is, as shown in FIG. 9, a long round steel pipe (long steel pipe) 21 having a predetermined thickness t and a panel zone having a thickness T larger than the thickness t of the long round steel pipe 21 and a panel zone. And a short round steel pipe (short steel pipe) 22 having a length (height) L to be formed. The long round steel pipe 21 and the short round steel pipe 22 have the same outer diameter D by hot forming. The outer portion of the long round steel pipe 21 is cut off at the end, so that a groove 21b having a predetermined angle (35 ° to 45 °) is formed at the end. Further, a ring-shaped backing metal 23 is fitted to the end of the long round steel pipe 21 and then fixed by welding 24. The end of the short round steel pipe 22 is not formed with a groove, and has a flat end face 22b.
[0036]
After the long round steel pipe 21 and the short round steel pipe 22 formed as described above are concentrically and linearly positioned, the backing metal 23 positioned inside the long round steel pipe 21 is removed. The outer end face 23b is brought into contact with the flat end face 22b of the short round steel pipe 22. That is, the groove portion (end face) 21b of the long round steel pipe 21 and the flat end face 22b of the short round steel pipe 22 not forming a groove face each other.
[0037]
Then, as shown in FIG. 10 to FIG. 12, after the gap between the facing groove portion 21b and the flat end surface 22b is tack-welded from the outside, welding is performed over the entire circumference from the outside (e.g., arc welding). 25, the long round steel pipe 21 and the short round steel pipe 22 are connected by welding 25 from the outside, and the round steel pipe column (steel pipe column) 26 is formed by using the short round steel pipe 2 as a panel zone. Can be configured. At that time, the connection by the welding 25 can be suitably performed in a state where the backing metal 23 is used.
[0038]
【The invention's effect】
According to the first aspect of the present invention, the long steel pipe and the short steel pipe are linearly positioned with the same outer peripheral shape, and the end faces are opposed to each other. By joining over the entire circumference from the steel pipe, a steel pipe for a column material can be configured that maintains various advantages of a type employing a thick short steel pipe. At this time, the joining work by welding can be performed more smoothly, efficiently, and always in a state where no step (misalignment) occurs because the outer diameter shape is the same, and it is more preferable. It is possible to transmit a strong stress. Since the thick short steel pipe does not have a groove, the manufacturing time can be reduced and the steel pipe can be formed at low cost.
[0039]
According to the above-described claim 2 of the present invention, the long rectangular steel pipe and the short rectangular steel pipe are linearly positioned with the same outer peripheral shape, and the end faces are opposed to each other. By joining the spaces by welding over the entire circumference from the outside, a steel pipe for a column material can be configured that maintains various advantages of a type employing a thick short rectangular steel pipe. At this time, the joining operation by welding between the corner portions can be performed more smoothly, efficiently, and always favorably because the facing outer peripheral curved surfaces are the same and there is no step (misalignment). it can.
[0040]
According to claim 3 of the present invention described above, after the long round steel pipe and the short round steel pipe are concentrically positioned linearly, the space between the opposed end faces extends over the entire circumference from the outside. By joining by welding, a steel pipe for a column material which maintains various advantages of a type employing a thick short round steel pipe can be formed.
[0041]
Further, according to the above-described claim 4 of the present invention, the long steel pipe and the short steel pipe are arranged in a straight line with the same outer peripheral shape, and the space between the opposed end faces extends over the entire circumference from the outside. By joining by means of the above-mentioned welding, a steel pipe for a column material having a short steel pipe as a panel zone can be formed, and thus various advantages of a type employing a thick short steel pipe can be maintained.
[0042]
In addition, according to the fifth aspect of the present invention, the joining operation by welding can be suitably performed using the backing metal, and the backing metal is brought into contact with the flat end surface of the short steel pipe. Thus, the welding can be performed quickly with a reduced amount of welding. Furthermore, a specially processed backing metal is not required.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention, and is a partially cutaway perspective view of a square steel pipe column in a joint structure of a steel pipe for a column member before welding and joining.
FIG. 2 is a vertical sectional front view of a square steel pipe column in the joint structure for a steel pipe for column material.
FIG. 3 is a partially cutaway perspective view of a square steel pipe column in the joint structure of the steel pipe for column material.
FIG. 4 is a longitudinal sectional front view of a flat plate portion of a square steel pipe column in the joint structure of the steel pipe for column material.
FIG. 5 is a longitudinal sectional front view of a corner portion of a square steel pipe column in the joint structure of the steel pipe for column material.
FIG. 6 is a longitudinal sectional front view of an enlarged main part of a square steel pipe column in the joint structure of the steel pipe for column material.
FIG. 7 is a cross-sectional plan view of a square steel pipe column in the joint structure for a steel pipe for column material.
FIG. 8 is an explanatory view of hot forming of the square steel pipe in the square steel pipe column in the joint structure of the steel pipe for column material.
FIG. 9 shows a second embodiment of the present invention, and is a partially cutaway perspective view of a round steel pipe column in a joint structure of a steel pipe for a column member before welding connection.
FIG. 10 is a longitudinal sectional front view of a round steel pipe column in the joint structure of the steel pipe for column material.
FIG. 11 is a longitudinal sectional front view of an enlarged main part of a round steel pipe column in the joint structure of the steel pipe for column material.
FIG. 12 is a cross-sectional plan view of a round steel pipe column in the joint structure of the steel pipe for column material.
[Explanation of symbols]
1 long rectangular steel pipe (long steel pipe)
1A Corner 1a Outer curved surface 1b Groove (end face)
2 Short rectangular steel pipe (short steel pipe)
2A Corner 2a Outer curved surface 2b Flat end surface (end surface)
3 Backing metal 3b Outer end face 5 Welding 6 Square steel pipe column (steel pipe for column material)
7 Beam flange or beam material 11 Semi-formed long rectangular steel pipe 12 Semi-formed short rectangular steel pipe 15 Heating means (heating furnace)
16 Forming means (Forming roll device)
17 Forming means (Forming roll device)
18 Processing means (cutting equipment)
21 Long round square steel pipe (long steel pipe)
21b Groove (end face)
22 Short round steel pipe (short steel pipe)
22b Flat end face (end face)
23 Backing metal 23b Outer end surface 25 Weld 26 Round steel pipe column (steel pipe for column material)
t Predetermined plate thickness T Thick plate thickness L Length forming panel zone W Outer dimension (outer diameter shape)
R radius of curvature (outer diameter shape)
D Outer diameter (outer diameter shape)

Claims (5)

所定の板厚の長尺鋼管と、この長尺鋼管よりも板厚が厚い短尺鋼管とからなり、これら長尺鋼管と短尺鋼管とは、熱間成形によって外径形状が同一状に形成され、長尺鋼管の端面と、開先を形成していない短尺鋼管の端面とが対向された状態で、両鋼管を外側からの溶接により結合して構成されていることを特徴とする柱材用鋼管の継手構造。A long steel pipe having a predetermined plate thickness and a short steel pipe having a plate thickness greater than the long steel pipe, and the long steel pipe and the short steel pipe are formed to have the same outer diameter by hot forming, A steel pipe for column material, wherein the end face of the long steel pipe and the end face of the short steel pipe not forming a groove are opposed to each other, and the two steel pipes are joined by welding from the outside. Joint structure. 長尺鋼管と短尺鋼管とは四角形鋼管からなり、これら長尺四角形鋼管と短尺四角形鋼管とは、熱間成形によって外寸とコーナ部の外周曲面とが同一状に形成されていることを特徴とする請求項1記載の柱材用鋼管の継手構造。The long steel pipe and the short steel pipe are formed of square steel pipes, and the long square steel pipe and the short square steel pipe are characterized in that the outer dimensions and the outer peripheral curved surface of the corner portion are formed to be identical by hot forming. The joint structure for a steel pipe for a pillar according to claim 1. 長尺鋼管と短尺鋼管とは丸形鋼管からなり、これら長尺丸形鋼管と短尺丸形鋼管とは、熱間成形によって外径が同一状に形成されていることを特徴とする請求項1記載の柱材用鋼管の継手構造。The long steel pipe and the short steel pipe are made of round steel pipes, and the long round steel pipe and the short round steel pipe are formed to have the same outer diameter by hot forming. The joint structure of the steel pipe for column material described in the above. 短尺鋼管がパネルゾーンを形成する長さであることを特徴とする請求項1〜3のいずれかに記載の柱材用鋼管の継手構造。The joint structure for a steel pipe for column material according to any one of claims 1 to 3, wherein the short steel pipe has a length forming a panel zone. 長尺鋼管の内部に位置させた裏当て金を短尺鋼管の端面に当接させた状態で、両鋼管を外側からの溶接により結合することを特徴とする請求項1〜4のいずれかに記載の柱材用鋼管の継手構造。The two steel pipes are joined by welding from the outside while the backing metal located inside the long steel pipe is in contact with the end face of the short steel pipe. Joint structure of steel pipe for pillar material.
JP2002188841A 2002-06-28 2002-06-28 Joint structure of steel pipe for column member Pending JP2004027740A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2002188841A JP2004027740A (en) 2002-06-28 2002-06-28 Joint structure of steel pipe for column member
DE2002161604 DE10261604B4 (en) 2002-06-28 2002-12-28 Connection of column steel tubes
MYPI20030045 MY130349A (en) 2002-06-28 2003-01-07 Joint construction of column member steel pipes
CNB031016790A CN1306127C (en) 2002-06-28 2003-01-14 A welded joint construction for a steel pipe column
GB0300937A GB2390125B (en) 2002-06-28 2003-01-15 Joint construction of column member steel pipes
SG200300127A SG108310A1 (en) 2002-06-28 2003-01-21 Joint construction of column member steel pipes
FR0307887A FR2841579B1 (en) 2002-06-28 2003-06-30 ASSEMBLY OF STEEL TUBULAR COLUMN ELEMENTS
HK04103409A HK1060378A1 (en) 2002-06-28 2004-05-14 Joint construction of column member steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002188841A JP2004027740A (en) 2002-06-28 2002-06-28 Joint structure of steel pipe for column member

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JP2004027740A true JP2004027740A (en) 2004-01-29

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JP2002188841A Pending JP2004027740A (en) 2002-06-28 2002-06-28 Joint structure of steel pipe for column member

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103097626A (en) * 2010-09-09 2013-05-08 杰富意钢铁株式会社 Steel pipe column structure and method for producing same
JP2017089125A (en) * 2015-11-04 2017-05-25 Jfeスチール株式会社 Butt-welded joint structure, connection structure, structure and joining method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103097626A (en) * 2010-09-09 2013-05-08 杰富意钢铁株式会社 Steel pipe column structure and method for producing same
CN103097626B (en) * 2010-09-09 2016-03-16 杰富意钢铁株式会社 Steel pipe column structure and manufacture method thereof
JP2017089125A (en) * 2015-11-04 2017-05-25 Jfeスチール株式会社 Butt-welded joint structure, connection structure, structure and joining method

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