JP3854194B2 - High-strength bolt joint structure and high-strength anchor bolts for concrete-filled steel pipe columns and H-shaped cross-section beams - Google Patents

High-strength bolt joint structure and high-strength anchor bolts for concrete-filled steel pipe columns and H-shaped cross-section beams Download PDF

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JP3854194B2
JP3854194B2 JP2002152658A JP2002152658A JP3854194B2 JP 3854194 B2 JP3854194 B2 JP 3854194B2 JP 2002152658 A JP2002152658 A JP 2002152658A JP 2002152658 A JP2002152658 A JP 2002152658A JP 3854194 B2 JP3854194 B2 JP 3854194B2
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steel pipe
anchor plate
nut
head
pipe column
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JP2003343008A (en
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信孝 清水
暢芳 宇野
紳一 澤泉
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Nippon Steel Corp
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Nippon Steel Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、主に、建築構造物を構成する角形または円形のコンクリート充填鋼管柱（ＣＦＴ柱）にＨ形断面梁を接合金物を介して高力ボルト接合するコンクリート充填鋼管柱とＨ形断面梁の接合構造およびこの接合構造に用いる頭締め高力ボルトに関するものである。
【０００２】
【従来の技術】
従来、例えば、Ｓ造の角形鋼管柱とＨ形鋼梁を対象とした柱−梁接合部形式では、特開平１１−２６９９８６号公報に開示されるように、図１０に示すように、角形鋼管柱１の各側部に、それぞれ、上下一対のＴ形接合金物２ａ、２ｂの垂直板（フランジ）２ｆを高力ボルト３で接合し、この上下のＴ形接合金物２ａ、２ｂの水平板（ウエブ）２ｕ間にＨ形鋼梁４の端部を位置させ、上側Ｔ形接合金物２ａの水平板２ｕの下面側にＨ形鋼梁４の上フランジ４ａの上面を、また、下側Ｔ形接合金物２ｂの水平板２ｕの上面側にＨ形鋼梁４の下フランジ４ｂの上面を当接して高力ボルト５で接合する、溶接負担を軽減した角形鋼管柱とＨ形鋼梁の高力ボルト接合構造が一般的に知られている。
【０００３】
このような、高力ボルト接合構造においては、接合部性能は角形鋼管柱の面外曲げ抵抗により発揮されるため、接合部の剛性が比較的低いという問題がある。そのために、上記のような高力ボルト接合構造において、図１１（ａ）、（ｂ）に示すように、角形鋼管柱１の内部にコンクリート６を充填して角形鋼管柱の接合部の剛性を高めることも行われている。
しかし、単純に角形鋼管柱の内部にコンクリートを充填した場合には、Ｈ形鋼梁フランジからの圧縮力に対しては充填コンクリートの抵抗が期待できるものの、引張力に対しては角形鋼管柱側面の内部への変形抑制による性能の向上しか期待できず、コンクリート充填による接合部性能の向上は小さい。
【０００４】
一方、特開平６−２５７２２４号公報において、図１２（ａ）、（ｂ）に示すように、ＣＦＴ造の角形鋼管柱１とＨ形鉄骨梁４を対象とした柱−梁接合部形式で、ダイアフラムを設置せず、角形鋼管柱１の内部に縦リブ７を設けた柱−梁接合部が開示されている。この柱−梁接合部においては、縦リブの存在により梁フランジからの引張力に対して充填コンクリートの抵抗が生じるため、縦リブを設けない場合に比較して接合部性能の向上が期待できる。しかし、縦リブ７を角形鋼管柱内部に溶接する必要があり、この溶接を、角鋼管製造段階で行ったり、角形鋼管柱の接合部付近を切断して行うなどの加工負担が大きく、コスト高になる問題がある。
【０００５】
また、特開平６−２４８６９８号公報には、図１３に示すように、ＣＦＴ造の角型鋼管柱１とＨ型鉄骨梁４を対象とした柱−梁接合部形式で、ダイアフラム８を設置した角型鋼管柱１内部にスタッド９を設け、ダイアフラム８にＨ型鉄骨梁４を溶接した柱−梁接合部が開示されている。これらの柱−梁接合部においては、縦リブ７やスタッド９の存在によりＨ型鉄骨梁４フランジからの引張力に対して充填コンクリート６の抵抗が生じるため、縦リブまたはスタッドを設けない角型鋼管柱に比較して接合部性能の向上が期待できる。しかし、縦リブやスタッドを角鋼管内部に溶接する必要があり、この溶接を、角鋼管製造段階で行ったり、角形鋼管柱の接合部付近を切断して行う必要があることに加えて、ダイアフラムのための加工、溶接などの負担が大きく、コスト高になる問題がある。
【０００６】
例えば、図１１に示すようなＴ形接合金物と高力ボルトを用いた角形鋼管柱とＨ形鋼梁の接合構造において、角形鋼管柱の内部にコンクリートを充填して接合部の剛性を高める場合に、コンクリート６を充填する角形鋼管柱１の内部に図１２、図１３に示すような縦リブまたはスタッドを溶接して接合部性能を強化することが考えられる。
しかし、このＴ形接合金物と高力ボルトを用いた、コンクリートを充填する角形鋼管柱とＨ形鋼梁の接合構造において、縦リブまたはスタッドを角形鋼管柱内部に溶接する場合には、加工、溶接などの負担が大きくコスト高になることに加えて、高力ボルトを角形鋼管柱の内部側からボルト孔に挿入して、外部側でナットを締め付ける施工に支障を来すという問題がある。
【０００７】
【発明が解決しようとする課題】
本発明は、コスト負担を軽減して接合部性能（剛性、耐力）を向上可能な、接合金物と高力ボルトを用いた角形または円形のコンクリート充填鋼管柱（ＣＦＴ柱）とＨ形断面梁の接合構造と、この接合構造を実現させる頭部締め高力アンカーボルトの提供を目的とするものである。
【０００８】
【課題を解決するための手段】
本発明は、上記の目的を達成するために、以下の（１）〜（１２）を要旨とするものである。
（１） 接合金物を用いた角形または円形のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造において、鋼管柱の内部側に、予め、雌ねじを有するアンカー板を軽接合したナットを固定しておき、この鋼管柱の外面に当接した接合金物の外面から、ボルト孔に頭部締め高力ボルトを挿入し、その雄ねじを鋼管柱の内部側に固定したナットとアンカー板の雌ねじに螺合して、雄ねじ部の先端部をアンカー板に締結し更に締め付けることにより、アンカー板をナットから剥離させて頭部ナットから一定距離離してアンカー部を形成し、頭部締め高力ボルトの頭部と鋼管柱内部側のナットとの間で鋼管柱と接合金物を締結し、頭部締め高力ボルトのアンカー部とナットを、鋼管柱内部に充填して固化させたコンクリートに埋没させたことを特徴とするコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（２） 鋼管柱に対するナット（および座金）の固定手段が、接着またはろう付けであることを特徴とする（１）に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（３） アンカー板が頭締め高力ボルトの雄ねじとの締結部を有するものであることを特徴とする（１）に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（４） ナットに対するアンカー板の軽接合手段が、接着またはろう付けであることを特徴とする（１）に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（５） 頭部締め高力ボルトのアンカー板が、軸部より大径のものであることを特徴とする（１）から（４）のいずれかに記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（６） 頭部締め高力ボルトが、頭部にトルク導入用のピンテールを備え、頭部の座面に、この頭部より大径で締め付けトルクを付与可能な多角形の座金が挿通・当接されたことを特徴とする、（１）〜（５）のいずれかに記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。
（７） 頭部と、ナットと螺合する雄ねじとアンカー板の雌ねじと螺合する雄ねじを有する軸部と、軸部に挿通し頭部の座面に当接する座金とからなるボルト、ナットのセットであって、アンカー板には、頭部締め高力ボルトの締め付けによって、雄ねじ先端をアンカー板に締結して、アンカー板をナットから剥離させて所定の位置にアンカー部を有するた めの締結部（ねじ込み停止部）かあることを特徴とする頭部締め高力アンカーボルト。
（８） ナットと螺合する雄ねじの径とアンカー板の雌ねじに螺合する雄ねじの径を同じにして連続させ、アンカー板の締結・固定部をアンカー板に形成するようにしたボルト、ナットのセットであって、アンカー板には、アンカー板の雌ねじ孔を貫通させて、ストッパー板を固着して雌ねじ孔を塞ぐことにより、アンカー板に対するねじ込み停止部を有することを特徴とする頭部締め高力アンカーボルト。
（９） ナットと螺合する雄ねじの径よりアンカー板の雌ねじに螺合する雄ねじの径を小径にして径の段差部をつくり、大径の雄ねじの終端部にねじなし部を有し、頭部締め高力ボルト雄ねじの径の段差部により、アンカー板に対するねじ込み停止部を有することを特徴とする頭部締め高力アンカーボルト。
（１０） 頭部にトルク導入用のピンテールを備え、軸部に挿通し頭部の座面に当接する座金が頭部より大径で締め付けトルクを付与可能な多角形の座金であることを特徴とする（７）〜（９）のいずれか１項に記載の頭部締めアンカーボルト。
（１１） １対の溝形材または円形鋼管の１／２からなる半円形材を２シーム溶接して得られる鋼管柱の内部へのナット設置方法であって、２シーム溶接する前の一対の溝形材または半円形材の所定位置に予めボルト孔を明け、予め接着した座金、ナット、アンカー板を、中心がボルト孔の中心に合うように溝形材または半円形材の内面に当接して固定し、１対の溝形材または半円形材を２シーム溶接することを特徴とする鋼管柱内部への座金、ナット、アンカー板の設置方法。
（１２） ナットが、雌ねじ孔を有するアンカー板を軽接合したものであることを特徴とする（１１）に記載の鋼管柱内部へのナット設置方法。
【０００９】
【発明の実施の形態】
本発明は、Ｔ形接合金物やＬ形接合金物などの接合金物（以下「接合金物」という。）と引張高力ボルトを用いた角形または円形のコンクリート充填鋼管柱（ＣＦＴ柱）とＨ形鋼梁などのＨ形断面梁の高力ボルト接合構造において、接合金物と鋼管柱（ＣＦＴ柱）を高力ボルト接合する場合に適用されるものである。
本発明においては、接合金物を用いた角形または円形のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造において、予め鋼管柱の内部側にアンカー板を軽接合したナット（および座金）を固定しておき、当接した鋼管柱と接合金物のボルト孔に、外部側から頭部締め高力ボルトを挿入して、鋼管柱の内部側でアンカー部を形成するとともにナットと締結し、頭部締め高力ボルトの頭部とナット間で鋼管柱と接合金物を締結し、頭部締め高力ボルトのアンカー部を、鋼管柱内部に充填して固化させたコンクリートに埋没させることにより、充填コンクリートの抵抗力を頭部締め高力ボルトを介して鋼管柱の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させるものである。
【００１０】
また、ナットを鋼管柱の内部側に固定しておき、鋼管柱に対する接合金物を頭部締め高力ボルトを用い外部側からボルト孔に挿入してナットと螺合・締結することから、施工現場で上下の接合金物の取り付け順を任意に決めることができ、上下の接合金物にＨ形断面梁を取り付ける場合に、Ｈ形断面梁と接合金物との干渉を避けることができ、現場での施工性を向上することができる。また、基本的には、溶接接合を採用しない接合構造であるため、加工負担を軽減することができる。
【００１１】
本発明では、ナットを予め鋼管柱の内部に固定するものであるが、ナットの固定位置が手の届かない鋼管柱の内部側にある場合のナット固定方法としては、鋼管柱の内部にナット設置装置を挿入してナットを固定する方法が主体になるが、２シーム溶接で得られる鋼管柱の場合には、２シーム溶接前の１対の溝形材または半円形材に予めナット（および座金）を固定する方法、また、鋼管柱が大型の場合には、人が内部に入ってナットを固定する方法などがある。
ナットに座金を当接する場合には、ナットに予め座金を固定し、座金を鋼管柱に固定する。これらの固定手段としては、接着、ろう付け、溶接などを選択的に用いることができる。頭部締め高力ボルトのアンカー部をアンカー板で形成する場合には、アンカー板をナットに接着や、ろう付けなどにより、頭部締め高力ボルトの締め付けによって、剥離する程度の接合力で接合する。
【００１２】
この頭部締め高力ボルトのアンカー部の形成方法は、以下のアンカー板によるものである。
頭部締めボルトの軸部より大径の円形、正方形、多角形のアンカー板で、基本的には、頭部締め高力ボルト先端の雄ねじ部に螺合する雌ねじを形成したものである。このアンカー板は、ナットに予め接着やろう付けにより軽接合して、頭部締め高力ボルト先端の雄ねじ部と螺合・締結し、ナットとの軽接合力以上の締付力で締め付けてナットから剥離させ、所定の位置まで離してアンカー部とする。アンカー板を用いる場合には、鋼管柱のサイズや、ボルトの軸径にもよるが、締結に機能する鋼管内部のナットの先端から、鋼管径の０．１〜０．５倍程度離れた位置に形成するものであり、アンカー板の径（１辺）は軸径の１．５〜１０．０倍程度であることが望ましく、並列、直交、対面するアンカー板と干渉しないものとする。
【００１３】
本発明のアンカー部を有する頭部締め高力ボルト、即ち頭部締め高力アンカーボルトとしては、頭部と、ナットと螺合する雄ねじとアンカー板の雌ねじと螺合する雄ねじを有する軸部と、軸部に挿通し頭部の座面に当接する座金とからなるものがある。この場合では、頭部締め高力ボルトの締め付けによって、雄ねじ先端をアンカー板に締結して、アンカー板をナットから剥離させて所定の位置にアンカー部を形成するために締結部（ここではねじ込み停止部）を必要とする。この締結部は、頭部締め高力ボルト側に形成する場合（ａ）と、アンカー板側に形成する場合（ｂ）がある。
（ａ）螺合する雄ねじの径とアンカー板の雌ねじに螺合する雄ねじの径を同じにして連続させ、アンカー板の締結・固定部はアンカー板に形成するようにしたもの。この場合では、アンカー板の雌ねじは途中まで形成したり、アンカー板の雌ねじ孔を貫通させて、ストッパー板を固着して雌ねじ孔を塞ぐことにより、アンカー板に対するねじ込み停止部を形成することができる。
（ｂ）ナットと螺合する雄ねじの径よりアンカー板の雌ねじに螺合する雄ねじの径を小径にして径の段差部を形成したもので、大径の雄ねじの終端部にねじ無部を形成してナットとの締結をより安定なものにするもできる。この場合では、頭部締め高力ボルト雄ねじの径の段差部により、アンカー板に対するねじ込み停止部を形成することができる。
【００１４】
【実施例】
［実施例１］
以下に本発明の実施例１について、図１〜図３に基づいて説明する。この実施例１は、上下一対のＴ形接合金物と高力ボルトを用いた角形または円形のコンクリート充填鋼管柱（ＣＦＴ柱）とＨ形断面梁の接合構造において、上下Ｔ形接合金物２ａ、２ｂと鋼管柱１の接合に本発明を適用した場合のものである。
この実施例１では、鋼管柱１として、１対の溝形材または円形鋼管の１／２からなる半円形材を２シーム溶接して得られたものを用い、Ｔ形接合金物２ａ、２ｂと鋼管柱１を接合する高力ボルトとして、アンカー部を形成可能な本発明による頭締め高力ボルトを用いた。また、上下Ｔ形接合金物２ａ、２ｂとＨ形断面梁４の接合には、通常の高力ボルト５を用いた。
なお、Ｈ形断面梁４は、通常の場合、鋼管柱１の１〜４側面に取り付けられるが、ここでは、図１（ａ）、（ｂ）および図２（ａ）、（ｂ）に示すように、鋼管柱１の４側面にＨ形断面梁４を取り付けの場合において、接合構造の細部を１側面の部分図で代表説明する。
【００１５】
図１（ａ）、（ｂ）および図２（ａ）、（ｂ）において、コンクリート６を充填した鋼管柱１の４側面に、それぞれ、上下一対のＴ形接合金物２ａと２ｂの垂直板２ｆが所定の間隔をおいて、頭部締め高力ボルト１２により接合されており、Ｈ形断面梁４の上フランジ４ａは上側Ｔ形接合金物２ａの水平板２ｕの下面に高力ボルト５で接合され、Ｈ形断面梁４の下フランジ４ｂは下側Ｔ形接合金物２ｂの水平板２ｕの上面に当接され高力ボルト５で接合されている。
この頭部締め高力ボルト１２は、鋼管柱１に当接されたＴ形接合金物の外部からボルト孔に挿入されて、予め鋼管柱１の内部に固定されたナット１４に螺合・締結され、鋼管柱１の内部で先端部にアンカー板１３によるアンカー部が形成されている。このアンカー部１３は、鋼管柱１の内部に充填・固化されたコンクリート６に埋没させ、コンクリート６の抵抗力を頭部締め高力ボルト１２を介して鋼管柱１の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させるようにしている。
【００１６】
頭部締め高力ボルト１２は、より具体的には、図３、図４（ａ）、（ｂ）に示すように、トルク導入用のピンテール１２ｐを有する頭部１２ａと、雄ねじ部１２ｓを有する軸部１２ｂと、この軸部に挿通して頭部の座面に当接する六角形の座金１５とからなる。
この座金１５は、トルク導入を可能にするために専用の締結具（概念的には、連動動作する内筒と外筒を備え、外筒を座金１５に係合し内筒をピンテール１２ｐに係合し、内筒を回して締め付ける構造を有するもの。図示省略）でピンテール１２ｐに所定の締付力を付与するために締結具（外筒）と係合するものであり、頭部１２ａより大径で角形に形成されたものである。この頭部締め高力ボルト１２に螺合するナット１４は、座金１６を固定したものであり、座金１６を介して鋼管柱１の内部に固定されており、このナット１４には、頭部締め高力ボルト１２の雄ねじ１２ｓに螺合・締結する雌ねじ１３ｓを有するアンカー板１３が固定されている。
【００１７】
鋼管柱１と座金１６、座金１６とナット１４、ナット１４とアンカー板１３の固定手段としては、例えば図６（ａ）に示すような接着（ｂａ、ｂｂ）や、図６（ｂ）に示すような、ろう付け（ｓａ、ｓｂ）、あるいは溶接などがあるが、ここでは、接着（ｂａ、ｂｂ）を採用し、鋼管柱１と座金１６、座金１６とナット１４の接着は強接着ｂａにし、ナット１４とアンカー板１３の接着は、頭部締め高力ボルト１２の締め付けによって剥離させるので、この締付力で剥離させられる程度の軽接着ｂｂにした。
アンカー板１３は、頭部締めボルト１２の雄ねじ１２ｓに螺合する雌ねじ１３ｓを有するもので、例えば図５（ａ）〜（ｃ）に示すように、円形のもの１３、正方形のもの１３ａ、多角形のもの１３ｂがあり鍔状に形成されたものなどであるが、ここでは円形のもの１３を用いた。アンカー板１３の雌ねじ１３ｓは、ここでは途中まで形成され、頭部締め高力ボルト１２の雄ねじ先端部の締結部となっている。
【００１８】
鋼管柱１の内部への座金１６、ナット１４、アンカー板１３の接着作業は、図７（ａ）、（ｂ）、（ｃ）、（ｄ）に示すように、１対の溝形材ＣａとＣｂまたは半円形材ＣｃとＣｄを２シーム溶接ｗして鋼管柱１を得る場合に、２シーム溶接前の１対の溝形材ＣａとＣｂまたは半円形材ＣｃとＣｄの所定位置にボルト孔Ｃｐを明けてから、予め接着した座金１６、ナット１４、アンカー板１３をボルト孔Ｃｐに合せて接着し、１対の溝形材ＣａとＣｂまたは半円形材ＣｃとＣｄを２シーム溶接して鋼管柱１とした時に、その内部の所定の位置に座金１６、ナット１４、アンカー板１３が位置するようにした。
頭部締め高力ボルト１２により鋼管柱１とＴ形接合金物２ａ、２ｂを接合する場合には、図４（ａ）に示すように、座金１３を挿通した頭部締め高力ボルト１２を、鋼管柱１に当接したＴ形接合金物２ａ、２ｂの垂直板２ｆの外部からボルト孔２ｐに挿入して、鋼管柱１のボルト孔１ｐ、鋼管柱１の内部に固定した座金１６を経て、ナット１４とアンカー板１３の雌ねじ１３ｓに螺合し、雄ねじ１２ｓの先端をアンカー板１３の雌ねじ１３ｓに締結して、更に締め付けることによって、アンカー板１３をナット１６から剥離させ、図４（ｂ）に示すように、鋼管柱１の内部の所定位置に達したところで、ナット１６との締結が完了し、頭部締めボルト１２の頭部１２ａに当接した座金１５とナット１６間で鋼管柱１とＴ形接合金物２ａ、２ｂを締結する。この頭部締め高力ボルト１２の締め付けには、前記したように、専用の締結具が用いられピンテール１２ｐを破断させることによりトルク導入した締め付けが可能である。
【００１９】
鋼管柱１とＴ形接合金物２ａ、２ｂを締結後、鋼管柱１の内部にコンクリート６を充填して固化させ、このコンクリート６の中に、アンカー板１３からナット１６までを埋没させる。
このようにして、頭部締め高力ボルト１２を用いて角形または円形のコンクリート充填鋼管柱１と各Ｔ形接合金物２ａ、２ｂを高力ボルト接合後、各Ｔ形接合金物２ａ、２ｂにＨ形断面梁４を高力ボルト接合することによって、図１（ａ）、（ｂ）および図２（ａ）、（ｂ）に示すようなコンクリート充填鋼管柱とＨ形断面梁の接合構造を得ることができる。
各Ｈ形断面梁４をＴ形接合金物２ａ、２ｂに高力ボルト５で接合する場合には、各Ｈ形断面梁４の先端面がＴ形接合金物２ａ、２ｂの垂直板２ｆに突き当たるように（ただし、間隙があり突き当たらない）位置させ、上フランジ４ａが上側Ｔ形接合金物２ａの水平板２ｕの下面に当接された状態で高力ボルト５により接合され、下フランジ４ｂが、下側Ｔ形接合金物２ｂの水平板２ｕの上面に当接された状態で高力ボルト５により接合される。
【００２０】
この接合構造においては、Ｔ形接合金物２ａ、２ｂを頭部締め高力ボルト１２を用い外部側からボルト孔に挿入してナットと螺合・締結することから、施工現場で上下のＴ形接合金物２ａ、２ｂの取り付け順を任意に決めることができ、上下のＴ形接合金物２ａ、２ｂにＨ形断面梁４を取り付ける場合に、Ｈ形断面梁とＴ形接合金物との干渉を任意に避けることができ、現場での施工性を向上させることができる。
Ｔ形接合金物２ａ、２ｂに対するＨ形断面梁４の取り付けは、通常はＴ形接合金物２ａ、２ｂを鋼管柱１に接合した後に行うが、Ｈ形断面梁４をＴ形接合金物２ａ、２ｂの水平板２ｕと予め接合してから、Ｔ形接合金物２ａ、２ｂの垂直板２ｆを鋼管柱１に接合することもできる。
【００２１】
この実施例１においては、頭部締め高力ボルト１２のアンカー板１３からナット１４までを、鋼管柱１の内部に充填して固化させたコンクリート６に埋没させることにより、充填コンクリートの抵抗力を頭部締め高力ボルト１２を介して鋼管柱１の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させることができる。また、基本的には、溶接接合を採用しない接合構造であるため、加工負担を軽減することができる。
【００２２】
［実施例２］
以下に本発明の実施例２について、図８（ａ）、（ｂ）、（ｃ）図に基づいて説明する。この実施例２は、実施例１と同様、上下一対のＴ形接合金物と高力ボルトを用いたコンクリート充填鋼管柱（ＣＦＴ柱）とＨ形断面梁の接合構造において、上下のＴ形接合金物２ａ、２ｂと鋼管柱１の接合に本発明を適用した場合のものであり、実施例１とは、頭部締めボルト１２の先端部に締結するアンカー板の構造が異なる点で異なる。他の部分については実施例１と概ね共通するので、説明を省略し、アンカー板に係わる部分を主体に説明する。
【００２３】
図８（ａ）に示すように、頭部締め高力ボルト１２と、この頭部締め高力ボルト１２に螺合するナット１４、座金１６は、実施例１と同様のものであり、ナット１４、座金１６は鋼管柱１の内部に固定されている。このナット１４には、頭部締め高力ボルト１２の雄ねじ１２ｓに螺合・締結する雌ねじ１３ｓを有するアンカー板１３′が固定されている。このアンカー板１３′は、雌ねじ１３ｓによるねじ孔がアンカー板１３′を貫通するように形成されており、このねじ孔はアンカー板１３′に強接着ｂａされたストッパー板１７で閉鎖して、このアンカー板１３′の雌ねじ１３ｓに螺合した頭部締め高力ボルト１２の雄ねじ１２ｓの先端がストッパー板１７に突き当たることにより、頭部締め高力ボルト１２の先端にアンカー板１３′を締結するようになっている。すなわち、ストッパー板１７が頭部締め高力ボルト１２との締結部になっている。
【００２４】
頭部締め高力ボルト１２により鋼管柱１とＴ形接合金物２ａ、２ｂを接合する場合には、図８（ｂ）に示すように、座金１５を挿通した頭部締め高力ボルト１２を、鋼管柱１に当接したＴ形接合金物２ａ、２ｂの垂直板２ｆの外部からボルト孔２ｐに挿入して、鋼管柱１のボルト孔１ｐ、鋼管柱１の内部に固定した座金１６を経て、ナット１４とアンカー板１３′の雌ねじ１３ｓに螺合し、雄ねじ１２ｓの先端をアンカー板１３′の雌ねじ１３ｓに締結して、更に締め付けることによって、アンカー板１３′をナット１４から剥離させ、図８（ｃ）に示すように、鋼管柱１の内部の所定位置に達したところで、ナット１４との締結が完了し、頭部締めボルト１２の頭部１２ａとナット１４間で鋼管柱１とＴ形接合金物２ａ、２ｂの垂直板２ｆを締結する。
鋼管柱１とＴ形接合金物２ａ、２ｂを締結後、鋼管柱１の内部にコンクリートを充填・固化させ、コンクリート６にストッパー板１７に締結したアンカー板１３′から座金１６までを埋没させる。
【００２５】
このようにして、コンクリート充填鋼管柱１と各Ｔ形接合金物２ａ、２ｂを接合後、各Ｔ形接合金物２ａ、２ｂの水平板２ｕにＨ形断面梁４を高力ボルト接合することによって、図１（ａ）、（ｂ）および図２（ａ）、（ｂ）に示すようなコンクリート充填鋼管柱とＨ形断面梁の接合構造を得ることができる。
この実施例２においては、充填コンクリートの抵抗力を高力ボルトを介して鋼管柱の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させる効果、その他の効果は、実施例１の場合とほぼ同様である。
【００２６】
［実施例３］
以下に本発明の実施例３について、図９（ａ）、（ｂ）、（ｃ）図に基づいて説明する。この実施例３は、実施例１、２と同様、上下一対のＴ形接合金物と高力ボルトを用いたコンクリート充填鋼管柱（ＣＦＴ柱）とＨ形断面梁の接合構造において、上下のＴ形接合金物２ａ、２ｂと鋼管柱１の接合に本発明を適用した場合のものであり、実施例１、２とは、頭部締めボルトの先端部構造と、その先端部に締結するアンカー板１３″の構造が異なる点で異なる。他の部分については実施例１、２と概ね共通するので、説明を省略し、頭部締め高力ボルト１２′とアンカー板１３″に係わる部分を主体に説明する。
【００２７】
頭部締め高力ボルト１２′は、図９（ａ）に示すように、トルク導入用のピンテール１２ｐを有する頭部１２ａと、鋼管柱１の内部に固定したナット１４と螺合・締結する雄ねじ部１２ｓとナット１４に接着したアンカー板１３″に螺合・締結する雄ねじ部１２ｓより小径の雄ねじ部１９ｓを有する軸部１２ｃを有し、雄ねじ部１２ｓの終端と雄ねじ部１９ｓの境界に段差部が形成されている。この段差部は、雄ねじ部１９ｓにアンカー板１３″を螺合したときにアンカー板１３″の締結部になる。この頭部締め高力ボルト１２′の軸部１２ｃには、頭部１２ａの座面に当接する六角形の座金１５が挿通されている。この座金１５は、実施例１の座金１５と同様のもので、同様に機能するものである。
頭部締め高力ボルト１２′に螺合するナット１４は、座金１６に固定したものであり、座金１６を介して鋼管柱１の内部に固定されており、このナット１４には、頭部締め高力ボルト１２′の先端部の小径の雄ねじ１９ｓに螺合・締結する雌ねじ２０ｓを有するアンカー板１３″が軽接着されている。雌ねじ２０ｓは、アンカー板１３″を貫通するものである。
【００２８】
鋼管柱１と座金１６、座金１６とナット１４、ナット１４とアンカー板１３″の固定手段は、実施例１と同様である。
頭部締め高力ボルト１２′により鋼管柱１とＴ形接合金物２ａ、２ｂを接合する場合には、図９（ｂ）に示すように、座金１５を挿通した頭部締め高力ボルト１２′を、鋼管柱１に当接したＴ形接合金物２ａ、２ｂの垂直板２ｆの外部からボルト孔２ｐに挿入して、鋼管柱１のボルト孔１ｐ、鋼管柱１の内部に固定した座金１６を経て、雄ねじ１２ｓをナット１４に螺合し、先端の雄ねじ１９ｓをアンカー板１３″の雌ねじ２０ｓに螺合し、アンカー板１３″を頭部締め高力ボルト１２′の雄ねじ部１２ｓの終端と雄ねじ部１９ｓの境界に形成された段差部に締結する。
そして、更に頭部締め高力ボルト１２′を締め付けることによって、アンカー板１３″をナット１４から剥離させ、図９（ｃ）に示すように、アンカー板１３″が鋼管柱１の内部の所定位置に達したところで、ナット１４との締結が完了し、頭部締めボルト１２′の頭部１２ａとナット１４間で鋼管柱１とＴ形接合金物２ａ、２ｂの垂直板２ｆを締結する。鋼管柱１とＴ形接合金物２ａ、２ｂを締結後、鋼管柱１の内部にコンクリートを充填・固化させ、コンクリート６にアンカー板１３″から座金１６までを埋没させる。
【００２９】
このようにして、コンクリート充填鋼管柱１と各Ｔ形接合金物２ａ、２ｂを接合後、各Ｔ形接合金物２ａ、２ｂの水平板２ｕにＨ形断面梁４を高力ボルト接合することによって、図１（ａ）、（ｂ）および図２（ａ）、（ｂ）に示すようなコンクリート充填鋼管柱とＨ形断面梁の接合構造を得ることができる。
この実施例３においては、充填コンクリートの抵抗力を高力ボルトを介して鋼管柱の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させる効果、その他の効果は、実施例１、実施例２の場合とほぼ同様である。
【００３０】
本発明は、上記の実施例の内容に限定されるものではない。例えば各実施例では角形または円形の鋼管柱とＴ形接合金物の接合に適用したが、鋼管柱とＬ形接合金物などの接合にも適用できる。また、頭部締め高力ボルトの頭部、軸部、アンカー部を形成するアンカー板の形状および配置、鋼管柱内部へのナットや座金の固定方法、固定手段、接合部の施工手順などについては、接合対象物、接合部配置、要求される接合部性能などに応じて、上記請求項を満足する範囲内で変更のあるものである。
【００３１】
【発明の効果】
本発明では、予め角形または円形の鋼管柱の内部側にアンカー板を軽接合したナット（および座金）を固定しておき、当接した鋼管柱と接合金物のボルト孔に、外部側から鋼管柱の内部側でアンカー部を形成可能な頭部締め高力ボルトを挿入して、鋼管柱の内部側でナットと締結して、頭部締め高力ボルトの頭部とナット間で鋼管柱と接合金物を締結するとともに、先端部側に形成したアンカー部を、鋼管柱内部に充填して固化させたコンクリートに埋没させることにより、充填コンクリートの抵抗力を頭部締め高力ボルトを介して鋼管柱の接合部に作用させ、この接合部における圧縮力と引張力に対する接合部性能（剛性、耐力）を向上させることができる。
また、ナットを鋼管柱の内部側に固定しておき、鋼管柱に対する接合金物を頭部締め高力ボルトを用い、外部側からボルト孔に挿入してナットと螺合・締結することから、施工現場で上下の接合金物の取り付け順を任意に決めることができ、上下の接合金物にＨ形断面梁を取り付ける場合に、Ｈ形断面梁と接合金物との干渉を避けることができ、現場での施工性を向上させることができる。また、基本的には、溶接接合を採用しない接合構造であるため、加工負担を軽減することができる。
【図面の簡単な説明】
【図１】（ａ）図は、本発明の実施例１による角形のコンクリート充填鋼管柱とＴ形接合金物の高力ボルト接合構造例で、接合が完了した状態を示す平面断面説明図、（ｂ）図は、（ａ）図の正面断面説明図。
【図２】（ａ）図は、本発明の実施例１による円形のコンクリート充填鋼管柱とＴ形接合金物の高力ボルト接合構造例で、接合が完了した状態を示す平面断面説明図、（ｂ）図は、（ａ）図の正面断面説明図。
【図３】（ａ）図は、本発明の実施例１で用いられる頭部締め高力ボルトと鋼管柱の内部に固定される座金、ナット、アンカー板例の部分的側断面説明図、（ｂ）図は、（ａ）図の頭部締め高力ボルトのＡａ−Ａｂ矢視説明図。
【図４】（ａ）図は、図３の頭部締め高力ボルトによる接合過程を示す部分的側断面説明図、（ｂ）図は、（ａ）図の状態を経て接合が完了した状態を示す部分的側断面説明図。
【図５】（ａ）〜（ｃ）図は、本発明の頭部締め高力ボルトにアンカー部を形成するアンカー板の形状例を示す正面説明図。
【図６】本発明の実施例１で、鋼管柱の内部に固定される座金、ナット、アンカー板と固定手段例を示す部分的側面説明図で、（ａ）図は、接着による場合を示し、（ｂ）図は、ろう付けによる場合を示す。
【図７】実施例１で用いる２シーム溶接による角形または円形の鋼管柱と、その内部への座金、ナット、アンカー板の固定方法例を示す部分的側断面説明図で、（ａ）図は、角形の鋼管柱の場合の２シーム溶接前の状態を示す正面説明図、（ｂ）図は、２シーム溶接後の状態を示す正面説明図、（ｃ）図は、円形の鋼管柱の場合の２シーム溶接前の状態を示す正面説明図、（ｄ）図は、２シーム溶接後の状態を示す正面説明図。
【図８】（ａ）図は、本発明の実施例２で用いられる頭部締め高力ボルトと鋼管柱の内部に固定される座金、ナット、アンカー板例の部分的側側面説明図、（ｂ）図は、頭部締め高力ボルトによる接合過程を示す部分的側断面説明図、（ｃ）図は、（ｂ）図の状態を経て接合が完了した状態を示す部分的側断面説明図。
【図９】（ａ）図は、本発明の実施例３で用いられる頭部締め高力ボルトと鋼管柱の内部に固定される座金、ナット、アンカー板例の部分的側側面説明図、（ｂ）図は、頭部締め高力ボルトによる接合過程を示す部分的側断面説明図、（ｃ）図は、（ｂ）図の状態を経て接合が完了した状態を示す部分的側断面説明図。
【図１０】従来のＴ形接合金物と高力ボルトを用いた角形鋼管柱とＨ形断面梁の高力ボルト接合構造例を示す立体説明図。
【図１１】（ａ）図は、従来のＴ形接合金物と高力ボルトを用いたコンクリート充填角形鋼管柱とＨ形鋼梁の高力ボルト接合構造例を示す平面断面説明図、（ｂ）図は、（ａ）図の正面断面説明図。
【図１２】従来の他のコンクリート充填角形鋼管柱とＨ形鋼梁の溶接による接合構造例を示す平面説明図、（ｂ）図は、（ａ）図の正面断面説明図。
【図１３】従来のダイアフラムと鋼管内部のスタッドを用いたコンクリート充填角形鋼管柱とＨ形鋼梁の溶接による接合構造例を示す平面説明図。
【符号の説明】
１ 鋼管柱 １ｐ ボルト孔
２ａ 上側Ｔ形接合金物 ２ｂ 下側Ｔ形接合金物
２ｐ ボルト孔 ２ｆ 垂直板
２ｕ 水平板 ３ 高力ボルト
４ Ｈ形断面梁 ４ａ 上フランジ
４ｂ 下フランジ ５ 高力ボルト
６ コンクリート ７ 縦リブ（アンカー）
８ ダイアフラム ９ スタッド（アンカー）
１２、１２′、１２″ 頭部締め高力ボルト
１２ａ 頭部 １２ｂ、１２ｃ、１２ｄ 軸部
１２ｐ ピンテール １２ｓ 雄ねじ
１３、１３′、１３″、１３ａ、１３ｂ アンカー板
１３ｓ 雌ねじ １４ ナット
１５ 座金 １６ 座金
１７ ストッパー板 １９ｓ 雄ねじ（アンカー板用）
２０ｓ 雌ねじ ２１ リブ
２２ 頭部締め高力ボルト ２２ａ 頭部
２２ｂ 軸部 ２２ｓ 雄ねじ
２２ｐ ピンテール Ｃａ、Ｃｂ 溝形材
Ｃｃ、Ｃｄ 半円形材 Ｃｐ ボルト孔
ｂａ 強接着 ｂｂ 軽接着
ｓａ、ｓｂ ろう付け ｗ 溶接[0001]
BACKGROUND OF THE INVENTION
  The present invention mainly includes a concrete-filled steel pipe column and an H-shaped cross-section beam in which an H-shaped cross-section beam is joined to a square or circular concrete-filled steel pipe column (CFT column) constituting a building structure via a joint hardware. And a head-clamping high-strength bolt used for the joint structure.
[0002]
[Prior art]
  Conventionally, for example, in a column-beam joint type for S-shaped square steel pipe columns and H-shaped steel beams, as disclosed in JP-A-11-269986,FIG.As shown in FIG. 1, a vertical plate (flange) 2f of a pair of upper and lower T-shaped joints 2a and 2b is joined to each side portion of the square steel pipe column 1 with a high-strength bolt 3, respectively. The end of the H-shaped steel beam 4 is positioned between the horizontal plates (webs) 2u of 2a and 2b, and the upper surface of the upper flange 4a of the H-shaped steel beam 4 is placed on the lower surface side of the horizontal plate 2u of the upper T-shaped fitting 2a. In addition, a square steel pipe column with a reduced welding load, in which the upper surface of the lower flange 4b of the H-shaped steel beam 4 is brought into contact with the upper surface of the horizontal plate 2u of the lower T-shaped metal fitting 2b and joined with a high-strength bolt 5. A high-strength bolt joint structure of an H-shaped steel beam is generally known.
[0003]
  In such a high-strength bolt joint structure, since the joint performance is exhibited by the out-of-plane bending resistance of the square steel pipe column, there is a problem that the rigidity of the joint is relatively low. Therefore, in the high-strength bolt joint structure as described above,FIG.As shown to (a), (b), the inside of the square steel pipe pillar 1 is filled with the concrete 6, and the rigidity of the junction part of a square steel pipe pillar is also raised.
  However, when concrete is simply filled into the square steel tube column, the resistance of the filled concrete can be expected against the compressive force from the H-shaped steel beam flange, but the side surface of the square steel tube column against tensile force. The improvement of the performance by suppressing the deformation to the inside can be expected, and the improvement of the joint performance by the concrete filling is small.
[0004]
  On the other hand, in JP-A-6-257224, FIG.As shown in (a) and (b), it is a column-beam joint type for CFT-structured square steel pipe column 1 and H-shaped steel beam 4, and no diaphragm is installed inside square steel pipe column 1 A column-beam joint provided with vertical ribs 7 is disclosed. In this column-beam joint portion, the presence of the longitudinal rib causes resistance of the filled concrete against the tensile force from the beam flange, and therefore it is expected that the joint performance can be improved as compared with the case where the longitudinal rib is not provided. However, it is necessary to weld the vertical ribs 7 to the inside of the square steel pipe column, and this welding is performed at the stage of manufacturing the square steel pipe or by cutting the vicinity of the joint portion of the square steel pipe column. There is a problem to become.
[0005]
  Japanese Patent Application Laid-Open No. 6-248698 discloses thatFIG.As shown in FIG. 2, a stud 9 is provided inside a square steel pipe column 1 in which a diaphragm 8 is installed in a column-beam joint type for a CFT-structured square steel pipe column 1 and an H-shaped steel beam 4. 1 discloses a column-beam joint where an H-shaped steel beam 4 is welded. In these column-beam joints, the presence of the vertical ribs 7 and studs 9 causes resistance of the filled concrete 6 to the tensile force from the flanges of the H-shaped steel beam 4, so that the rectangular shape without the vertical ribs or studs is provided. The joint performance can be expected to improve compared to steel pipe columns. However, it is necessary to weld vertical ribs and studs to the inside of the square steel pipe, and in addition to the need to perform this welding in the square steel pipe manufacturing stage or by cutting the vicinity of the joint part of the square steel pipe column, the diaphragm For this reason, there is a problem that the burden of processing, welding, etc. is large and the cost is high.
[0006]
  For example,In FIG.In the joining structure of a rectangular steel pipe column and H-shaped steel beam using T-shaped joint hardware and high-strength bolts as shown in the figure, when filling the inside of the square steel pipe column with concrete to increase the rigidity of the joint, Inside the square steel pipe column 1 to be filled12 and 13It is conceivable to enhance the joint performance by welding vertical ribs or studs as shown in FIG.
  However, in the joining structure of a square steel pipe column filled with concrete and an H-shaped steel beam using this T-shaped joint hardware and high-strength bolt, when welding a longitudinal rib or stud inside the square steel pipe column, In addition to the large burden of welding and high costs, there is a problem in that a high-strength bolt is inserted into the bolt hole from the inside of the square steel pipe column and the nut is tightened on the outside.
[0007]
[Problems to be solved by the invention]
  The present invention reduces the cost burden and improves the joint performance (rigidity and proof stress), and can be used for a square or circular concrete-filled steel pipe column (CFT column) and an H-shaped cross-section beam using joint hardware and high-strength bolts. The object is to provide a joint structure and a head-clamped high-strength anchor bolt that realizes the joint structure.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention provides the following (1) to (1) to(12)Is a summary.
(1)  In a high-strength bolt joint structure of square or circular concrete-filled steel pipe columns and H-shaped cross-section beams using joint hardware, a nut that is lightly joined to an anchor plate having an internal thread is fixed in advance to the inside of the steel pipe pillar. Then, from the outer surface of the metal fitting that is in contact with the outer surface of the steel pipe column, a high-strength bolt is tightened into the bolt hole and the male screw is screwed into the nut fixed to the inner side of the steel pipe column and the female screw of the anchor plate. Then, tighten the tip of the male screw part to the anchor plate and tighten it further to peel off the anchor plate from the nut and to form an anchor part at a certain distance from the head nut. The steel pipe column and joint hardware are fastened with the nut on the inner side of the steel pipe column, and the anchor part and nut of the high-strength bolt for head tightening are buried in the solidified concrete filled in the steel pipe column. When High-strength bolted connection structure of concrete filled tubular columns H-section beams that.
(2)  The fixing means of the nut (and washer) to the steel pipe column is adhesive or brazing(1)A high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam as described in 1.
(3)  The anchor plate has a fastening portion with a male screw of a head-tightening high-strength bolt.(1)A high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam as described in 1.
(4)  The high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to (1), wherein the light joining means of the anchor plate to the nut is adhesion or brazing.
(5)  The anchor plate of the head tightening high-strength bolt is larger in diameter than the shaft portion.From (1) to (4)High-strength bolt joint structure of the concrete-filled steel pipe column and H-shaped cross-section beam as described.
(6)  The head-tightening high-strength bolt has a pin tail for torque introduction on the head, and a polygonal washer that is larger in diameter than this head and can be tightened with torque is inserted and abutted on the seat surface of the head. A high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to any one of (1) to (5).
(7)  The head portion includes a shaft portion having a male screw threadedly engaged with the nut and a male screw threadedly engaged with the female screw of the anchor plate, and a washer that is inserted through the shaft portion and contacts the seating surface of the head portion.It is a set of bolts and nuts, and the anchor plate is fastened with a high-strength bolt at the head, the end of the male screw is fastened to the anchor plate, and the anchor plate is peeled off from the nut and has an anchor portion at a predetermined position. The There is a second fastening part (screwing stop)Head tightening high strength anchor bolt.
(8)  The diameter of the male screw that is screwed to the nut and the diameter of the male screw that is screwed to the female screw of the anchor plate are made to be the same, and the anchor plate fastening / fixing part is formed on the anchor plate.It is a set of bolts and nuts, and the anchor plate has a screwing stop portion for the anchor plate by penetrating the female screw hole of the anchor plate, fixing the stopper plate and closing the female screw holeHead tightening high strength anchor bolt.
(9)  Reduce the step of the diameter by reducing the diameter of the male screw that engages with the female screw of the anchor plate from the diameter of the male screw that engages with the nut.Make a large-diameter male screw with a screw-free part at the end, and a head-tightening high-strength bolt male screw with a stepped part with a diameter screw stop for the anchor plateHead tightening high strength anchor bolt.
(10)  The head is provided with a pin tail for torque introduction, and the washer that is inserted into the shaft and is in contact with the seating surface of the head is a polygonal washer having a diameter larger than that of the head and capable of applying a tightening torque.(7)-(9)The head-clamped anchor bolt according to any one of the above.
(11)  A method of installing a nut inside a steel pipe column obtained by two-seam welding of a pair of channel-shaped members or a semicircular material consisting of 1/2 of a circular steel pipe, and a pair of channel-shaped members before two-seam weldingOr semi-circular materialBolt holes are drilled in advance at predetermined positions,Pre-bonded washers, nuts and anchor platesA steel pipe column characterized by abutting and fixing an inner surface of a grooved or semicircular material so that the center thereof is aligned with the center of the bolt hole, and two-seam welding of a pair of grooved or semicircular materials InsideOf washers, nuts, anchor platesInstallation method.
(12)  The nut is lightly joined to an anchor plate having a female screw hole.(11)The nut installation method inside the steel pipe pillar described in 1.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
  The present invention relates to a joint metal such as a T-shaped joint metal or an L-shaped joint metal (hereinafter referred to as “joint metal”), a square or circular concrete-filled steel pipe column (CFT column) and a H-shaped steel using a tensile high-strength bolt. In a high-strength bolt joint structure of an H-shaped cross-section beam such as a beam, the present invention is applied when a joint metal and a steel pipe column (CFT column) are joined with a high-strength bolt.
  In the present invention, in a high-strength bolt joint structure of a square or circular concrete-filled steel pipe column and an H-shaped cross section beam using a joint metal, a nut (and a washer) in which an anchor plate is lightly joined in advance to the inner side of the steel pipe column. The bolts of the steel pipe column and the joint hardware that are in contact with each other are inserted into the bolt holes of the steel pipe columns that are in contact with each other. The steel pipe column and the joint hardware are fastened between the head and nut of the high-strength bolt, and the anchor part of the high-strength bolt is buried in the solidified concrete filled inside the steel pipe column. The resistance force of the concrete is applied to the joint portion of the steel pipe column via the head tightening high-strength bolt, and the joint performance (rigidity, proof stress) against the compressive force and the tensile force at the joint portion is improved.
[0010]
  Also, the nut is fixed to the inner side of the steel pipe column, and the joint hardware to the steel pipe column is tightened from the outside using a high-strength bolt.Bolt holeSince it is inserted, screwed and fastened to the nut, the mounting order of the upper and lower joint hardware can be arbitrarily determined at the construction site. When mounting the H-shaped cross section beam on the upper and lower joint hardware, Interference with the joint hardware can be avoided, and workability on site can be improved. Moreover, basically, since it is a joining structure that does not employ welding joining, the processing burden can be reduced.
[0011]
  In the present invention, the nut is fixed inside the steel pipe column in advance, but as a nut fixing method when the fixing position of the nut is on the inner side of the steel pipe column that is out of reach, the nut is installed inside the steel pipe column. The main method is to insert the device and fix the nut. In the case of a steel pipe column obtained by two-seam welding, the nut (and washer) is preliminarily attached to a pair of channel or semicircular members before two-seam welding. ), And when the steel pipe column is large, there is a method in which a person enters the inside and fixes the nut.
  When the washer is brought into contact with the nut, the washer is fixed to the nut in advance, and the washer is fixed to the steel pipe column. As these fixing means, adhesion, brazing, welding or the like can be selectively used. When the anchor part of the head tightening high-strength bolt is formed of an anchor plate, the anchor plate is bonded to the nut, brazed, etc. To do.
[0012]
  The method of forming the anchor portion of the head tightening high strength bolt is as follows.This is due to the anchor plate.
  A circular, square, or polygonal anchor plate having a larger diameter than the shaft portion of the head tightening bolt is basically formed with a female screw that is screwed into a male screw portion at the tip of the head tightening high strength bolt. This anchor plate is lightly joined to the nut in advance by gluing or brazing, screwed and fastened with the male thread at the tip of the head tightening high-strength bolt, and tightened with a tightening force greater than the light joining force with the nut. It is made to peel from, and it leaves | separates to a predetermined position and makes it an anchor part. When using an anchor plate, depending on the size of the steel pipe column and the shaft diameter of the bolt, a position that is 0.1 to 0.5 times the steel pipe diameter away from the tip of the nut inside the steel pipe that functions for fastening The diameter (one side) of the anchor plate is preferably about 1.5 to 10.0 times the shaft diameter, and does not interfere with the parallel, orthogonal, or facing anchor plates.
[0013]
  The head-clamping high-strength bolt having the anchor portion of the present invention, that is, the head-clamping high-strength anchor bolt includes a head portion, a shaft portion having a male screw screwed with a nut and a male screw screwed with a female screw of an anchor plate. Some of them are composed of a washer that is inserted through the shaft and abuts against the seating surface of the head. In this case, by tightening the head tightening high-strength bolt, the male screw tip is fastened to the anchor plate, and the anchor plate is peeled off from the nut to form the anchor portion at a predetermined position (here, screwing stop) Part). When this fastening part is formed on the head tightening high-strength bolt side(A)And when forming on the anchor plate side(B)There is.
(A)The diameter of the male screw to be screwed and the diameter of the male screw to be screwed to the female screw of the anchor plate are made the same, and the anchor plate fastening / fixing portion is formed on the anchor plate. In this case, the internal thread of the anchor plate can be formed halfway, or the screw stop portion for the anchor plate can be formed by penetrating the internal thread hole of the anchor plate and fixing the stopper plate to close the internal thread hole. .
(B) The diameter of the male screw screwed to the female screw of the anchor plate is made smaller than the diameter of the male screw screwed to the nut to form a stepped portion of the diameter, and a screwless part is formed at the end of the large diameter male screw. Thus, the fastening with the nut can be made more stable. In this case, the screwing stop portion for the anchor plate can be formed by the step portion having the diameter of the head tightening high strength bolt male screw.
[0014]
【Example】
  [Example 1]
  Embodiment 1 of the present invention will be described below with reference to FIGS. In this first embodiment, the upper and lower T-shaped joints 2a and 2b are formed in a joint structure of a square or circular concrete-filled steel pipe column (CFT column) and an H-shaped cross-section beam using a pair of upper and lower T-shaped joints and high strength bolts. This is the case where the present invention is applied to the joining of the steel pipe column 1.
  In this Example 1, as a steel pipe column 1, one obtained by two-seam welding of a pair of groove members or a semicircular member made of a half of a circular steel pipe is used. As a high-strength bolt for joining the steel pipe column 1, the head-clamping high-strength bolt according to the present invention capable of forming an anchor portion was used. Further, a normal high-strength bolt 5 was used for joining the upper and lower T-shaped metal fittings 2 a and 2 b and the H-shaped cross-section beam 4.
  In addition, although the H-shaped cross-section beam 4 is normally attached to the 1-4 side surfaces of the steel pipe column 1, here, it shows to Fig.1 (a), (b) and Fig.2 (a), (b). Thus, in the case where the H-shaped cross section beam 4 is attached to the four side surfaces of the steel pipe column 1, details of the joint structure will be representatively described with reference to a partial side view.
[0015]
  In FIGS. 1 (a), (b) and FIGS. 2 (a), (b), vertical plates 2f of a pair of upper and lower T-shaped joints 2a and 2b are provided on four side surfaces of a steel pipe column 1 filled with concrete 6, respectively. Are joined by a head-tightening high-strength bolt 12 at a predetermined interval, and the upper flange 4a of the H-shaped cross-section beam 4 is joined to the lower surface of the horizontal plate 2u of the upper T-shaped joint 2a by a high-strength bolt 5. The lower flange 4b of the H-shaped cross section beam 4 is brought into contact with the upper surface of the horizontal plate 2u of the lower T-shaped joint metal 2b and is joined by a high-strength bolt 5.
  The high-strength bolt 12 for tightening the head is inserted into the bolt hole from the outside of the T-shaped metal fitting abutted on the steel pipe column 1 and screwed and fastened to a nut 14 fixed in advance inside the steel pipe column 1. The anchor part by the anchor board 13 is formed in the front-end | tip part inside the steel pipe pillar 1. As shown in FIG. The anchor portion 13 is buried in the concrete 6 filled and solidified in the steel tube column 1, and the resistance force of the concrete 6 is applied to the joint portion of the steel tube column 1 via the head tightening high-strength bolt 12. The joint performance (rigidity, proof stress) against the compressive force and tensile force at the joint is improved.
[0016]
  More specifically, the head tightening high-strength bolt 12 has a head 12a having a pin tail 12p for torque introduction and a male screw portion 12s, as shown in FIGS. 3, 4A, and 4B. It comprises a shaft portion 12b and a hexagonal washer 15 that is inserted through the shaft portion and abuts against the seating surface of the head.
  The washer 15 is provided with a dedicated fastener (conceptually, an inner cylinder and an outer cylinder that operate in conjunction with each other), and the outer cylinder is engaged with the washer 15 and the inner cylinder is engaged with the pin tail 12p. In order to apply a predetermined tightening force to the pin tail 12p with a structure that rotates and tightens the inner cylinder (not shown), it engages with a fastener (outer cylinder) and is larger than the head 12a. It is formed into a square with a diameter. A nut 14 to be screwed onto the head tightening high strength bolt 12 has a washer 16 fixed thereto, and is fixed to the inside of the steel pipe column 1 via the washer 16. An anchor plate 13 having a female screw 13s that is screwed and fastened to the male screw 12s of the high-strength bolt 12 is fixed.
[0017]
  As a fixing means for the steel pipe column 1 and the washer 16, the washer 16 and the nut 14, and the nut 14 and the anchor plate 13, for example, bonding (ba, bb) as shown in FIG.FIG.Although there are brazing (sa, sb) or welding as shown in (b), here, adhesion (ba, bb) is adopted, and the steel pipe column 1 and the washer 16 and the washer 16 and the nut 14 are adhered. Is a strong bond ba, and the nut 14 and the anchor plate 13 are peeled off by tightening the head-tightening high-strength bolt 12, so that the light-bonding bb can be peeled off by this tightening force.
  The anchor plate 13 has a female screw 13s that is screwed into the male screw 12s of the head tightening bolt 12. For example, as shown in FIGS. 5 (a) to 5 (c), a circular member 13, a square member 13a, There is a square shape 13b formed in a bowl shape, but a circular shape 13 is used here. The female screw 13 s of the anchor plate 13 is formed halfway here, and serves as a fastening portion of the front end portion of the male screw of the head tightening high strength bolt 12.
[0018]
  As shown in FIGS. 7 (a), (b), (c), and (d), the bonding work of the washer 16, the nut 14, and the anchor plate 13 to the inside of the steel pipe column 1 is performed by a pair of channel members Ca. And Cb or semi-circular materials Cc and Cd are welded by two seams to obtain a steel pipe column 1, bolts are placed at predetermined positions of a pair of channel members Ca and Cb or semi-circular materials Cc and Cd before two-seam welding. After opening the hole Cp, the pre-bonded washer 16, nut 14 and anchor plate 13 are bonded to the bolt hole Cp, and a pair of channel members Ca and Cb or semi-circular members Cc and Cd are welded by two seams. When the steel pipe column 1 is used, the washer 16, the nut 14, and the anchor plate 13 are positioned at predetermined positions inside the column.
  When joining the steel pipe column 1 and the T-shaped fittings 2a and 2b with the head clamping high strength bolt 12, as shown in FIG. 4 (a), the head clamping high strength bolt 12 inserted through the washer 13 is Inserted into the bolt hole 2p from the outside of the vertical plate 2f of the T-shaped joining hardware 2a, 2b in contact with the steel pipe column 1 and passed through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1, The nut 14 and the female screw 13s of the anchor plate 13 are screwed together, the tip of the male screw 12s is fastened to the female screw 13s of the anchor plate 13, and further tightened, whereby the anchor plate 13 is peeled off from the nut 16 and FIG. As shown in FIG. 4, when the steel pipe column 1 reaches a predetermined position, the fastening with the nut 16 is completed, and the steel pipe column 1 is between the washer 15 and the nut 16 that are in contact with the head 12a of the head fastening bolt 12. T-joint hardware 2a, 2b Entered into to. As described above, the head tightening high-strength bolt 12 can be tightened with torque introduced by using a dedicated fastener and breaking the pin tail 12p.
[0019]
  After fastening the steel pipe pillar 1 and the T-shaped metal fittings 2 a and 2 b, the steel pipe pillar 1 is filled with concrete 6 and solidified, and the anchor plate 13 to the nut 16 are buried in the concrete 6.
  In this way, the square-shaped or circular concrete-filled steel pipe column 1 and each T-shaped joint metal 2a, 2b are joined to each T-shaped joint 2a, 2b by H using the head-tightening high-strength bolt 12 and then H. By joining the shaped cross-section beam 4 with high-strength bolts, the joint structure of the concrete-filled steel pipe column and the H-shaped cross-section beam as shown in FIGS. 1 (a), 1 (b) and 2 (a), 2 (b) is obtained. be able to.
  When each H-shaped cross-section beam 4 is joined to the T-shaped joint hardware 2a, 2b with a high-strength bolt 5, the tip surface of each H-shaped cross-section beam 4 abuts against the vertical plate 2f of the T-shaped joint hardware 2a, 2b. (However, there is a gap and does not strike), and the upper flange 4a is joined by the high-strength bolt 5 in a state where the upper flange 4a is in contact with the lower surface of the horizontal plate 2u of the upper T-shaped fitting 2a. It joins with the high strength volt | bolt 5 in the state contact | abutted on the upper surface of the horizontal plate 2u of the lower side T-shaped metal fitting 2b.
[0020]
  In this joining structure, the T-shaped joints 2a and 2b are inserted into the bolt holes from the outside using the head-tightening high-strength bolts 12, and are screwed and fastened to the nuts. The mounting order of the hardware 2a and 2b can be arbitrarily determined, and when the H-shaped cross-section beam 4 is mounted on the upper and lower T-shaped joints 2a and 2b, the interference between the H-shaped cross-section beam and the T-shaped joint hardware can be arbitrarily determined. It can be avoided, and the workability on site can be improved.
  The attachment of the H-shaped cross-section beam 4 to the T-shaped joint hardware 2a, 2b is usually performed after the T-shaped joint hardware 2a, 2b is joined to the steel pipe column 1, but the H-shaped cross-section beam 4 is attached to the T-shaped joint metal 2a, 2b. It is also possible to join the vertical plate 2f of the T-shaped joining hardware 2a, 2b to the steel pipe column 1 after joining to the horizontal plate 2u in advance.
[0021]
  In the first embodiment, the anchor plate 13 to the nut 14 of the head tightening high-strength bolt 12 are buried in the concrete 6 that has been filled and solidified in the steel pipe column 1, thereby increasing the resistance of the filled concrete. It can be made to act on the joint portion of the steel pipe column 1 via the head tightening high-strength bolt 12, and the joint performance (rigidity, proof stress) with respect to the compressive force and tensile force at this joint portion can be improved. Moreover, basically, since it is a joining structure that does not employ welding joining, the processing burden can be reduced.
[0022]
  [Example 2]
  A second embodiment of the present invention will be described below with reference to FIGS. 8 (a), (b), and (c). This Example 2 is similar to Example 1 in that a pair of upper and lower T-shaped joints, a concrete-filled steel pipe column (CFT column) using high-strength bolts, and an H-shaped cross-section joint structure are used. This is a case where the present invention is applied to the joining of 2a, 2b and the steel pipe column 1, and differs from the first embodiment in that the structure of the anchor plate fastened to the tip of the head fastening bolt 12 is different. Since the other portions are generally the same as those in the first embodiment, the description thereof will be omitted, and the description will be made mainly on the portion related to the anchor plate.
[0023]
  As shown in FIG. 8A, the head tightening high-strength bolt 12, the nut 14 and the washer 16 that are screwed onto the head tightening high-strength bolt 12 are the same as those in the first embodiment. The washer 16 is fixed inside the steel pipe column 1. An anchor plate 13 ′ having a female screw 13 s that is screwed and fastened to the male screw 12 s of the head tightening high-strength bolt 12 is fixed to the nut 14. The anchor plate 13 'is formed so that a screw hole formed by a female screw 13s passes through the anchor plate 13'. The screw hole is closed by a stopper plate 17 strongly bonded to the anchor plate 13 '. The tip of the male screw 12s of the head tightening high strength bolt 12 screwed into the female screw 13s of the anchor plate 13 'abuts against the stopper plate 17 so that the anchor plate 13' is fastened to the tip of the head tightening high strength bolt 12. It has become. That is, the stopper plate 17 is a fastening portion with the head fastening high strength bolt 12.
[0024]
  When joining the steel pipe column 1 and the T-shaped fittings 2a, 2b with the head clamping high strength bolt 12, as shown in FIG. 8 (b), the head clamping high strength bolt 12 inserted through the washer 15 is Inserted into the bolt hole 2p from the outside of the vertical plate 2f of the T-shaped metal fittings 2a and 2b that are in contact with the steel pipe column 1, through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1, The nut 14 and the female screw 13 s of the anchor plate 13 ′ are screwed together, the tip of the male screw 12 s is fastened to the female screw 13 s of the anchor plate 13 ′, and further tightened, whereby the anchor plate 13 ′ is peeled from the nut 14, and FIG. As shown in (c), when a predetermined position inside the steel pipe column 1 is reached, the fastening with the nut 14 is completed, and the steel pipe column 1 and the T-shape are connected between the head 12a of the head fastening bolt 12 and the nut 14. Vertical plate 2f of joint hardware 2a, 2b Entered into to.
  After the steel pipe column 1 and the T-shaped metal fittings 2a and 2b are fastened, the steel pipe column 1 is filled with concrete and solidified, and the concrete plate 6 is buried from the anchor plate 13 'fastened to the stopper plate 17 to the washer 16.
[0025]
  Thus, by joining the concrete-filled steel pipe column 1 and the respective T-shaped joints 2a and 2b, the H-shaped cross-section beam 4 is joined to the horizontal plate 2u of each T-shaped joint 2a and 2b by high-strength bolts. A joint structure of a concrete-filled steel pipe column and an H-shaped cross section beam as shown in FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b) can be obtained.
  In this Example 2, the effect of improving the joint performance (rigidity, proof stress) against compressive force and tensile force at the joint by causing the resistance of the filled concrete to act on the joint of the steel pipe column via a high-strength bolt. The other effects are almost the same as those in the first embodiment.
[0026]
  [Example 3]
  Embodiment 3 of the present invention will be described below with reference to FIGS. 9A, 9B, and 9C. This Example 3 is similar to Examples 1 and 2, in the joint structure of a concrete-filled steel pipe column (CFT column) and an H-shaped cross-section beam using a pair of upper and lower T-shaped joint hardware and high-strength bolts. When the present invention is applied to the joining of the metal fittings 2a, 2b and the steel pipe column 1, the first and second embodiments are the tip structure of the head tightening bolt and the anchor plate 13 fastened to the tip part. ″ Differs in the structure of ″. Since the other parts are almost the same as those of the first and second embodiments, the description thereof will be omitted, and the description will be made mainly on the parts related to the head tightening high strength bolt 12 ′ and the anchor plate 13 ″. To do.
[0027]
  As shown in FIG. 9A, the head tightening high strength bolt 12 ′ is a male screw that is screwed and fastened with a head 12 a having a pin tail 12 p for introducing torque and a nut 14 fixed inside the steel pipe column 1. The shaft portion 12c has a male screw portion 19s smaller in diameter than the male screw portion 12s to be screwed and fastened to the anchor plate 13 ″ bonded to the portion 12s and the nut 14, and a step portion at the boundary between the end of the male screw portion 12s and the male screw portion 19s. This step portion becomes a fastening portion of the anchor plate 13 ″ when the anchor plate 13 ″ is screwed to the male screw portion 19s. A hexagonal washer 15 that contacts the seating surface of the head 12a is inserted through the washer 15. The washer 15 is the same as the washer 15 of the first embodiment and functions in the same manner.
  A nut 14 screwed into the head tightening high strength bolt 12 ′ is fixed to the washer 16, and is fixed to the inside of the steel pipe column 1 via the washer 16. An anchor plate 13 ″ having a female screw 20s screwed and fastened to a small-diameter male screw 19s at the tip of the high-strength bolt 12 ′ is lightly bonded. The female screw 20s penetrates the anchor plate 13 ″.
[0028]
  The fixing means for the steel pipe column 1 and the washer 16, the washer 16 and the nut 14, and the nut 14 and the anchor plate 13 ″ are the same as in the first embodiment.
  When joining the steel pipe column 1 and the T-shaped fittings 2a, 2b with the head clamping high strength bolt 12 ', as shown in FIG. 9B, the head clamping high strength bolt 12' inserted through the washer 15. Is inserted into the bolt hole 2p from the outside of the vertical plate 2f of the T-shaped fittings 2a and 2b in contact with the steel pipe column 1, and the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed to the inside of the steel pipe column 1 are attached. Then, the male screw 12s is screwed into the nut 14, the male screw 19s at the tip is screwed into the female screw 20s of the anchor plate 13 ″, and the anchor plate 13 ″ is screwed to the end of the male screw portion 12s of the high strength bolt 12 ′ and the male screw. Fastened to a step formed on the boundary of the portion 19s.
  Then, by further tightening the head tightening high strength bolt 12 ', the anchor plate 13 "is peeled off from the nut 14, and the anchor plate 13" is positioned at a predetermined position inside the steel pipe column 1 as shown in FIG. Then, the fastening with the nut 14 is completed, and the steel pipe column 1 and the vertical plate 2f of the T-shaped fittings 2a, 2b are fastened between the head 12a of the head fastening bolt 12 'and the nut 14. After fastening the steel pipe column 1 and the T-shaped metal fittings 2a, 2b, concrete is filled and solidified in the steel pipe column 1, and the concrete plate 6 is buried from the anchor plate 13 ″ to the washer 16.
[0029]
  Thus, by joining the concrete-filled steel pipe column 1 and the respective T-shaped joints 2a and 2b, the H-shaped cross-section beam 4 is joined to the horizontal plate 2u of each T-shaped joint 2a and 2b by high-strength bolts. A joint structure of a concrete-filled steel pipe column and an H-shaped cross section beam as shown in FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b) can be obtained.
  In this Example 3, the effect of improving the joint performance (rigidity, proof stress) against the compressive force and tensile force at the joint by causing the resistance of the filled concrete to act on the joint of the steel pipe column via the high-strength bolt. The other effects are almost the same as those in the first and second embodiments.
[0030]
  The present invention is not limited to the contents of the above embodiments. For example, in each embodiment, the present invention is applied to the joining of a square or circular steel pipe column and a T-shaped joint hardware, but the present invention can also be applied to the joining of a steel pipe pillar and an L-shaped joint hardware. Also, it forms the head, shaft, and anchor part of the head tightening high strength boltAnchor plate shapeAnd the arrangement, the method of fixing the nut and washer inside the steel pipe column, the fixing means, the construction procedure of the joint, etc., according to the object to be joined, the joint placement, the required joint performance, etc. There are changes within the range of satisfaction.
[0031]
【The invention's effect】
  In the present invention, a nut (and a washer) lightly joined to an anchor plate is fixed in advance to the inner side of a square or circular steel pipe column, and the steel pipe column from the outside is inserted into the abutting steel pipe column and the bolt hole of the metal fitting. Insert a head-clamping high-strength bolt that can form an anchor on the inner side of the steel tube, fasten it with a nut on the inner side of the steel pipe column, and join the steel pipe column between the head and nut of the head-clamping high-strength bolt By fastening the hardware and burying the anchor part formed on the tip side in the solidified concrete filled inside the steel pipe column, the resistance force of the filled concrete is tightened through the high-strength bolts for tightening the steel pipe column. The joint performance (rigidity, proof stress) with respect to the compressive force and tensile force at the joint can be improved.
  In addition, the nut is fixed to the inner side of the steel pipe column, and the joint hardware to the steel pipe column is inserted into the bolt hole from the outside using a head-tightening high-strength bolt and screwed and fastened to the nut. The installation order of the upper and lower joint hardware can be determined arbitrarily at the site, and when H-shaped cross-section beams are attached to the upper and lower joint hardware, interference between the H-shaped cross-section beam and the joint hardware can be avoided. Workability can be improved. Moreover, basically, since it is a joining structure that does not employ welding joining, the processing burden can be reduced.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1A is a plan cross-sectional explanatory view showing a state where joining is completed in a high-strength bolt joint structure example of a square concrete-filled steel pipe column and a T-shaped joint metal fitting according to Embodiment 1 of the present invention. b) The figure is front sectional explanatory drawing of (a) figure.
FIG. 2 (a) is a plan cross-sectional explanatory view showing a state in which joining is completed in a high-strength bolt joint structure example of a circular concrete-filled steel pipe column and a T-shaped joint metal fitting according to Embodiment 1 of the present invention; b) The figure is front sectional explanatory drawing of (a) figure.
FIG. 3A is a partial side cross-sectional explanatory view of an example of a head tightening high-strength bolt and a washer, a nut, and an anchor plate fixed inside a steel pipe column used in Example 1 of the present invention; b) The figure is Aa-Ab arrow explanatory drawing of the head fastening high-strength bolt of the figure (a).
4A is a partial side cross-sectional explanatory view showing a joining process using the head-clamping high-strength bolts of FIG. 3, and FIG. 4B is a state where joining is completed through the state of FIG. FIG.
FIGS. 5 (a) to 5 (c) are front explanatory views showing an example of the shape of an anchor plate for forming an anchor portion in the head tightening high strength bolt of the present invention.
6 is a partial side explanatory view showing an example of a washer, a nut, an anchor plate and a fixing means fixed inside a steel pipe column in Embodiment 1 of the present invention, and FIG. (B) The case by brazing is shown.
FIG. 7 is a partial side cross-sectional explanatory view showing an example of a method for fixing a square or circular steel pipe column by two seam welding used in Example 1 and a washer, a nut, and an anchor plate therein, and (a) FIG. , A front explanatory view showing a state before two seam welding in the case of a square steel pipe column, (b) a front explanatory view showing a state after two seam welding, (c) a case of a circular steel pipe column Front explanatory drawing which shows the state before 2 seam welding, (d) The figure is front explanatory drawing which shows the state after 2 seam welding.
FIG. 8 (a) is a partial side view illustrating an example of a head tightening high-strength bolt and a washer, a nut, and an anchor plate fixed in a steel pipe column used in Embodiment 2 of the present invention; b) The figure is a partial sectional side view illustrating the joining process using the head-clamping high-strength bolts, and FIG. .
FIG. 9 (a) is a partial side view for explaining an example of a head tightening high-strength bolt and a washer, nut, and anchor plate fixed inside a steel pipe column used in Example 3 of the present invention; b) The figure is a partial side cross-sectional explanatory view showing the joining process by the head tightening high-strength bolt, (c) The figure is the partial side cross-sectional explanatory view showing the state where the joining is completed through the state of FIG. .
FIG. 10The solid explanatory drawing which shows the example of the high strength bolt joining structure of the square steel pipe column and H-shaped cross-section beam using the conventional T-shaped joining metal fitting and the high strength bolt.
FIG. 11 (a) The figure is a plane cross-sectional explanatory drawing showing an example of a high-strength bolt joint structure of a concrete-filled rectangular steel pipe column and an H-shaped steel beam using a conventional T-joint metal fitting and a high-strength bolt, and FIG. ) Front sectional explanatory view of the figure.
FIG.Plan explanatory drawing which shows the example of joining structure by welding of the other conventional concrete filling square steel pipe column and H-shaped steel beam, (b) figure is front sectional explanatory drawing of (a) figure.
FIG. 13Plane explanatory drawing which shows the example of joining structure by welding of the concrete filled square steel pipe column and the H-shaped steel beam using the conventional diaphragm and the stud inside a steel pipe.
[Explanation of symbols]
1 Steel tube pillar 1p Bolt hole
2a Upper T-shaped fitting 2b Lower T-shaped fitting
2p bolt hole 2f vertical plate
2u horizontal plate 3 high strength bolt
4 H section beam 4a Upper flange
4b Lower flange 5 High strength bolt
6 Concrete 7 Vertical rib (anchor)
8 Diaphragm 9 Stud (anchor)
12, 12 ', 12 "head tightening high strength bolt
12a Head 12b, 12c, 12d Shaft
12p pintail 12s male thread
13, 13 ', 13 ", 13a, 13b Anchor plate
13s Female thread 14 Nut
15 washer 16 washer
17 Stopper plate 19s Male thread (for anchor plate)
20s female thread 21 rib
22 Head tightening high strength bolt 22a Head
22b Shaft 22s Male thread
22p pintail Ca, Cb channel material
Cc, Cd Semi-circular material Cp Bolt hole
ba Strong adhesion bb Light adhesion
sa, sb brazing w welding

Claims (12)

接合金物を用いた角形または円形のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造において、鋼管柱の内部側に、予め、雌ねじを有するアンカー板を軽接合したナットを固定しておき、この鋼管柱の外面に当接した接合金物の外面から、ボルト孔に頭部締め高力ボルトを挿入し、その雄ねじを鋼管柱の内部側に固定したナットとアンカー板の雌ねじに螺合して、雄ねじ部の先端部をアンカー板に締結し更に締め付けることにより、アンカー板をナットから剥離させて頭部ナットから一定距離離してアンカー部を形成し、頭部締め高力ボルトの頭部と鋼管柱内部側のナットとの間で鋼管柱と接合金物を締結し、頭部締め高力ボルトのアンカー部とナットを、鋼管柱内部に充填して固化させたコンクリートに埋没させたことを特徴とするコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。  In a high-strength bolt joint structure of square or circular concrete-filled steel pipe columns and H-shaped cross-section beams using joint hardware, a nut that is lightly joined to an anchor plate having an internal thread is fixed in advance to the inside of the steel pipe pillar. Then, from the outer surface of the metal fitting that is in contact with the outer surface of the steel pipe column, a high-strength bolt is tightened into the bolt hole and the male screw is screwed into the nut fixed to the inner side of the steel pipe column and the female screw of the anchor plate. Then, tighten the tip of the male screw part to the anchor plate and tighten it further to peel off the anchor plate from the nut and to form an anchor part at a certain distance from the head nut. The steel pipe column and joint hardware are fastened with the nut on the inner side of the steel pipe column, and the anchor part and nut of the high-strength bolt for head tightening are buried in the solidified concrete filled in the steel pipe column. When High-strength bolted connection structure of concrete filled tubular columns H-section beams that. 鋼管柱に対するナット（および座金）の固定手段が、接着またはろう付けであることを特徴とする請求項１に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。The high-strength bolt joint structure for a concrete-filled steel pipe column and an H-shaped cross-section beam according to claim 1, wherein the means for fixing the nut (and washer) to the steel pipe column is adhesion or brazing. アンカー板が頭締め高力ボルトの雄ねじとの締結部を有するものであることを特徴とする請求項１に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。  2. The high strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to claim 1, wherein the anchor plate has a fastening portion with a male screw of a head tightening high strength bolt. ナットに対するアンカー板の軽接合手段が、接着またはろう付けであることを特徴とする請求項１に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。  The high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to claim 1, wherein the means for lightly joining the anchor plate to the nut is adhesion or brazing. 頭部締め高力ボルトのアンカー板が、軸部より大径のものであることを特徴とする請求項１〜４のいずれか１項に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。The high strength of the concrete-filled steel pipe column and the H-shaped cross-section beam according to any one of claims 1 to 4, wherein the anchor plate of the high-strength bolt for tightening the head has a larger diameter than the shaft portion. Bolt connection structure. 頭部締め高力ボルトが、頭部にトルク導入用のピンテールを備え、頭部の座面に、この頭部より大径で締め付けトルクを付与可能な多角形の座金が挿通・当接されたことを特徴とする、請求項１〜５のいずれか１項に記載のコンクリート充填鋼管柱とＨ形断面梁の高力ボルト接合構造。The head-tightening high-strength bolt has a pin tail for torque introduction on the head, and a polygonal washer that is larger in diameter than this head and can be tightened with torque is inserted and abutted on the seat surface of the head. The high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to any one of claims 1 to 5 . 頭部と、ナットと螺合する雄ねじとアンカー板の雌ねじと螺合する雄ねじを有する軸部と、軸部に挿通し頭部の座面に当接する座金とからなるボルト、ナットのセットであって、アンカー板には、頭部締め高力ボルトの締め付けによって、雄ねじ先端をアンカー板に締結して、アンカー板をナットから剥離させて所定の位置にアンカー部を有するための締結部（ねじ込み停止部）かあることを特徴とする頭部締め高力アンカーボルト。 A set of bolts and nuts comprising a head, a shaft portion having a male screw threadedly engaged with a nut and a male screw threadedly engaged with a female screw of an anchor plate, and a washer that passes through the shaft portion and comes into contact with the seat surface of the head. The anchor plate is fastened with a high-strength bolt that tightens the head, and the end of the male screw is fastened to the anchor plate, and the anchor plate is peeled off from the nut to have the anchor portion in place (screwing stop) Part) or a head-tightened high-strength anchor bolt. ナットと螺合する雄ねじの径とアンカー板の雌ねじに螺合する雄ねじの径を同じにして連続させ、アンカー板の締結・固定部をアンカー板に形成するようにしたボルト、ナットのセットであって、アンカー板には、アンカー板の雌ねじ孔を貫通させて、ストッパー板を固着して雌ねじ孔を塞ぐことにより、アンカー板に対するねじ込み停止部を有することを特徴とする頭部締め高力アンカーボルト。 A set of bolts and nuts in which the diameter of the male screw threaded into the nut and the diameter of the male thread threaded into the female screw on the anchor plate are made the same, and the anchor plate fastening / fixing part is formed on the anchor plate. The anchor plate has a screwing stop portion with respect to the anchor plate by penetrating the female screw hole of the anchor plate and fixing the stopper plate to close the female screw hole. . ナットと螺合する雄ねじの径よりアンカー板の雌ねじに螺合する雄ねじの径を小径にして径の段差部をつくり、大径の雄ねじの終端部にねじなし部を有し、頭部締め高力ボルト雄ねじの径の段差部により、アンカー板に対するねじ込み停止部を有することを特徴とする頭部締め高力アンカーボルト。The diameter of the male screw to be screwed to the female screw of the anchor plate is made smaller than the diameter of the male screw to be screwed to the nut to create a stepped portion of the diameter, and a screwless portion is provided at the end of the large diameter male screw. A head-tightened high-strength anchor bolt characterized by having a screwing stop portion for an anchor plate by a stepped portion having a diameter of a force bolt male screw . 頭部にトルク導入用のピンテールを備え、軸部に挿通し頭部の座面に当接する座金が頭部より大径で締め付けトルクを付与可能な多角形の座金であることを特徴とする請求項７〜９のいずれか１項に記載の頭部締めアンカーボルト。Head comprising a pintail for torque introduced, wherein abutting washer seating surface of inserted into the shank head, characterized in that a washer of a torque capable imparting polygonal clamping a larger diameter than the head Item 10. The head-clamped anchor bolt according to any one of Items 7 to 9 . １対の溝形材または円形鋼管の１／２からなる半円形材を２シーム溶接して得られる鋼管柱の内部へのナット設置方法であって、２シーム溶接する前の一対の溝形材または半円形材の所定位置に予めボルト孔を明け、予め接着した座金、ナット、アンカー板を、中心がボルト孔の中心に合うように溝形材または半円形材の内面に当接して固定し、１対の溝形材または半円形材を２シーム溶接することを特徴とする鋼管柱内部への座金、ナット、アンカー板の設置方法。A method of installing a nut inside a steel pipe column obtained by two-seam welding of a pair of channel-shaped members or a semicircular material consisting of 1/2 of a circular steel pipe, and a pair of channel-shaped members before two-seam welding Alternatively, a bolt hole is drilled at a predetermined position of the semicircular material , and a pre-bonded washer, nut, and anchor plate are fixed in contact with the inner surface of the groove or semicircular material so that the center is aligned with the center of the bolt hole. A method of installing a washer, a nut, and an anchor plate inside a steel pipe column, wherein two seams are welded to a pair of channel members or semicircular members. ナットが、雌ねじ孔を有するアンカー板を軽接合したものであることを特徴とする請求項１１に記載の鋼管柱内部へのナット設置方法。The nut installation method according to claim 11 , wherein the nut is lightly joined to an anchor plate having a female screw hole.
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