JP4690810B2

JP4690810B2 - Large beam and small beam joint construction method and joint structure

Info

Publication number: JP4690810B2
Application number: JP2005217145A
Authority: JP
Inventors: 暢芳宇野
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2005-07-27
Filing date: 2005-07-27
Publication date: 2011-06-01
Anticipated expiration: 2025-07-27
Also published as: JP2007032098A

Description

本発明は、鉄骨建築物の床部や屋上部などの支持部となる主桁を構成する大梁と小梁の接合に関し、特に、大梁の設置後に大梁間に小梁を上方から大梁と交叉するように垂直に吊り下げ配置・位置決めして接合する場合に適用して有効な大梁と小梁の接合施工方法と接合構造に関する。 The present invention relates to the joining of a girder and a girder that constitute a main girder that serves as a support part such as a floor or a roof of a steel building, and in particular, after the girder is installed, the girder is crossed between the girder from above. As described above, the present invention relates to a method and a structure for joining a large beam and a small beam, which are effective when applied by suspending and positioning vertically.

鉄骨建築物を構築する場合には、例えば、図６に示すように、鉄骨柱Ｐ間に接合したＨ形鋼からなる大梁１を設置後に、隣合う大梁１間に、この大梁１と直交する複数のＨ形鋼からなる小梁２を接合して主桁を構成し、この主桁を構成する各梁の上フランジ上に、デッキプレートやデッキプレートとコンクリートによる合成床版を床部材として配設したり、各梁の上フランジにスタッドを設けてコンクリートを打設することにより床部や屋上（屋根）部を形成することが知られている。 When constructing a steel building, for example, as shown in FIG. 6, after installing the large beam 1 made of H-shaped steel joined between the steel columns P, between the adjacent large beams 1 is orthogonal to the large beam 1. A main girder is formed by joining a plurality of small beams 2 made of H-shaped steel, and a deck plate or a deck deck and a composite floor slab made of concrete are arranged as floor members on the upper flange of each beam constituting the main girder. It is known to form a floor portion or a roof (roof) portion by installing or placing a stud on the upper flange of each beam and placing concrete.

このように床部や屋上（屋根）部を形成する大梁１と小梁２の接合構造としては、例えば、
（１）．図７（ａ）、（ｂ）で示すように、大梁１の上下フランジ１ａ、１ｂとウェブ１ｕ間にボルト孔を有するガセットプレート３を溶接し、この大梁１のガセットプレート３形成部に、小梁２の端部を直交方向から間隙ｅを設けて突き合わせるように配置し、ガセットプレート３と小梁２のウェブ２ｕに、ボルト孔を有する添板１０を当接して高力ボルト５で接合する高力ボルト接合構造。
（２）．図８（ａ）、（ｂ）で示すように、大梁１に側部に、ボルト孔を有するボルト接合部３ａを大梁１のフランジ１ａ、１ｂ側端から突出させるように形成したガセットプレート３_１を溶接し、この大梁１のガセットプレート３_１形成部に小梁２の端部を直交方向から間隙ｅを設けて突き合わせるように配置し、ガセットプレート３_１のボルト接合部３ａに、小梁２のウェブ２ｕを当接して高力ボルト５で接合する大梁と小梁の高力ボルト接合構造。
あるいは、（１）〜（２）の接合構造を組み合わせた大梁と小梁の接合構造などが知られている。 As a joining structure of the large beam 1 and the small beam 2 forming the floor part or the roof (roof) part in this way, for example,
(1). As shown in FIGS. 7A and 7B, a gusset plate 3 having a bolt hole is welded between the upper and lower flanges 1a and 1b of the large beam 1 and the web 1u, and a small portion is formed on the gusset plate 3 forming portion of the large beam 1. The ends of the beams 2 are arranged so as to face each other with a gap e from the orthogonal direction, and the accessory plate 10 having a bolt hole is brought into contact with the gusset plate 3 and the web 2 u of the small beam 2 and joined with the high strength bolt 5. High-strength bolt joint structure.
(2). As shown in FIGS. 8A and 8B, a gusset plate 3 ₁ formed so that a bolt joint portion 3a having a bolt hole is protruded from a flange 1a, 1b side end of the large beam 1 on a side portion of the large beam _1. welded, placing the ends of the joists 2 in gusset plates 3 ₁ forming part of the girder 1 from the orthogonal direction to abut be a clearance e, the bolted connection 3a of the gusset plate 3 _1, the beams A high-strength bolt joint structure of a large beam and a small beam that abut the two webs 2u and join with a high-strength bolt 5.
Or the joining structure of a big beam and a small beam which combined the joining structure of (1)-(2) is known.

しかし、上記（１）〜（２）の各接合構造では、いずれも大梁１にガセットプレート３を溶接する必要があり、ガセットプレートの加工、溶接施工負担が大きく、コスト高になるという問題がある。加えて、小梁のウェブと接合金物やガセットプレートを高力ボルト接合する必要があり、ボルト接合のための位置合わせやボルト締結など接合施工負担が大きく、またボルトコスト負担も大きくなるという問題もある。 However, in each of the joint structures (1) to (2), it is necessary to weld the gusset plate 3 to the girder 1, and there is a problem that the processing and welding work of the gusset plate is large and the cost is high. . In addition, it is necessary to perform high-strength bolted connection between the small beam web and the metal fittings and gusset plates, which increases the burden of joining work such as positioning for bolting and bolt fastening, and also increases the cost of bolting. is there.

他の大梁と小梁のボルト接合構造として、例えば特許文献１には、大梁にボルト接合部を有するガセットプレートとガイド板を設けて、このガイド板によって、端部で下フランジ部を切り欠いた小梁ウェブの位置決めを容易にし、この小梁ウェブを大梁のガセットプレートまたはガイド板とボルト接合するボルト接合構造が開示されている。
また、特許文献２には、小梁に高力ボルト接合部になるガセットプレートと、スチフナプレートを設けて、大梁のガセットプレートを高力ボルトにより剛接合して、接合構造の強度と剛性を有し、運搬も施行（施工）も容易なボルト接合構造が開示されている。
しかし、特許文献１、特許文献２のボルト接合構造では、いずれも上記（１）〜（２）と同様、大梁にガセットプレートを溶接するものであるため、上記（１）〜（２）と同様の問題があり、特許文献１のボルト接合構造では、さらにガイド板を併設してボルト接合する必要があるため、加工、施工負担が増加するという問題がある。 As another bolt connection structure of a large beam and a small beam, for example, in Patent Document 1, a gusset plate having a bolt connection portion and a guide plate are provided on the large beam, and the lower flange portion is cut off at the end by the guide plate. A bolted structure is disclosed that facilitates positioning of the beam beam and bolts the beam beam to a gusset plate or guide plate of the beam.
Further, in Patent Document 2, a gusset plate that becomes a high-strength bolt joint portion and a stiffener plate are provided on a small beam, and the gusset plate of a large beam is rigidly joined with a high-strength bolt to have the strength and rigidity of the joint structure. In addition, a bolt joint structure that is easy to transport and implement (construct) is disclosed.
However, in the bolted joint structures of Patent Document 1 and Patent Document 2, both are the same as (1) to (2) above, because the gusset plate is welded to the girder as in the above (1) to (2). In the bolted joint structure disclosed in Patent Document 1, it is necessary to further join the guide plate and bolt the joint, which increases the processing and construction burden.

また、特許文献２のボルト接合構造では、大梁１を設置した後に小梁を上方から大梁と直交するように垂直に吊り下げて接合する場合では、大梁のガセットプレートが小梁の上フランジと干渉し、小梁のガセットプレートが大梁の上フランジと干渉するため、他の施工方法（手順）を選択する必要があり施工方法（手順）の選択幅が狭い。
特許文献３には、従来例として、大梁のウェブにアングルを取り付け、これに小梁をボルトで固定することが開示されている。
しかし、この例では大梁を設置した後に小梁を上方から大梁と直交するように垂直に吊り下げて接合する場合では、大梁に取り付けたアングルが小梁の下フランジと干渉するため、小梁を、下フランジがアングルと干渉しない、接合部から若干離れた位置に吊り下げてから横移動し、そのウェブをアングルに当接位置合わせして接合する必要がある。また、一対のアングルを用い、アングルを小梁ウェブの両側に接合して接合部強度を高める場合では、例えば一方のアングルと小梁を当接してから、他方のアングルを大梁に取り付け小梁ウェブの他方側に当接位置合わせしてボルト接合する必要があり、接合施工時間が長くなるという問題がある。
特許文献４には、大梁と小梁の接合にＬ字型の小梁支持金具を用いて接合するものがあるが、本願のように小梁上フランジの下面を大梁に接合したＬ型の小梁支持金物の上面に係止し、または、大梁に接合するための小梁支持金物のボルト孔を小梁支持金物の中心線から上側に偏心させるなどして圧縮力作用領域を広げたものはない。
特開２００４−２７８２１０号公報特開２００２−２８５６４２号公報特開平１０−１３１２８９号公報特開平５−２５８７６号公報 Further, in the bolted joint structure of Patent Document 2, when the small beam is vertically suspended so as to be orthogonal to the large beam after the large beam 1 is installed, the large beam gusset plate interferes with the upper flange of the small beam. However, since the gusset plate of the small beam interferes with the upper flange of the large beam, it is necessary to select another construction method (procedure) and the selection range of the construction method (procedure) is narrow.
Patent Document 3 discloses, as a conventional example, attaching an angle to a large beam web and fixing the small beam to the web with a bolt.
However, in this example, when the small beam is vertically suspended so as to be orthogonal to the large beam from above after joining the large beam, the angle attached to the large beam interferes with the lower flange of the small beam. The lower flange does not interfere with the angle and needs to be moved laterally after being hung to a position slightly away from the joint, and the web must be brought into contact with the angle and joined. In addition, when using a pair of angles and joining the angles to both sides of the small beam web to increase the joint strength, for example, one angle and the small beam are contacted, and then the other angle is attached to the large beam. There is a problem that it is necessary to align the abutting position with the other side and to perform bolted bonding, which increases the time required for bonding.
In Patent Document 4, there is an L-shaped small beam support bracket that is used to join a large beam and a small beam. As in the present application, an L-shaped small beam in which the lower surface of the upper flange of the small beam is bonded to the large beam. Locking on the upper surface of the beam support hardware or expanding the compressive force action area by decentering the bolt hole of the beam support hardware to the upper beam from the center line of the beam support hardware. Absent.
JP 2004-278210 A JP 2002-285642 A JP-A-10-131289 Japanese Patent Application Laid-Open No. 5-25876

本発明は、鉄骨建築物の床部や屋上部の支持部となる主桁を構成する大梁と小梁の接合構造において、特に、鉄骨柱に大梁を設置後隣合う大梁間に、小梁を大梁間の上方から大梁と交叉（直交が主体）するように吊り下げ、その先端と大梁のフランジ側端間に所定の間隙（１０ｍｍ前後）を形成するように配置・位置決めして接合する場合に、大梁と小梁を円滑に且つ容易に接合して接合部性能を安定確保でき、材料・加工コスト、施工コスト負担も軽減できる、大梁と小梁の接合施工方法および接合構造を提供するものである。 The present invention relates to a joint structure of a large beam and a small beam that constitute a main girder that serves as a support for a floor portion or a roof of a steel building, and in particular, a small beam is installed between adjacent large beams after a large beam is installed on a steel column. When hanging from the upper part of the beam so as to cross the beam (mainly orthogonal), and placing and positioning to join the tip and the flange side end of the beam to form a predetermined gap (around 10mm) It provides a method and structure for joining large beams and small beams that can smoothly and easily join large beams and small beams to ensure stable joint performance and reduce material / processing costs and construction costs. is there.

本発明は、上記課題を解決するために、以下の（１）〜（４）の構成を要旨とするものである。
（１）大梁のウェブに締結される大梁接合部と大梁上フランジの側端から交叉方向に突出する小梁支持部とがＬ型を形成するＬ型の小梁支持金物を介して、大梁間に上方から吊り下げられる小梁を大梁に接合する大梁と小梁の接合施工方法であって、
大梁ウェブの少なくとも片面側に対向配置された一対の小梁支持金物がその小梁支持部間に小梁ウェブを上方から挿入できる挿入空間を形成するように、かつ小梁支持部と大梁上フランジ下面とが密着するように、当該一対の小梁支持金物の各々の大梁接合部を、小梁支持部における中心線より上方に偏心した位置において高力ボルトで大梁のウェブに予め締結しておき、
前記形成された挿入空間に上方から吊り下げられる小梁のウェブを挿入し、各々の小梁支持部の上端に小梁上フランジ下面を係止することにより小梁を大梁に接合することを特徴とする大梁と小梁の接合施工方法。
（２）大梁のウェブに締結される大梁接合部と大梁上フランジの側端から交叉方向に突出する小梁支持部とがＬ型を形成するＬ型の小梁支持金物を介して、大梁間に上方から吊り下げられる小梁を大梁に接合する大梁と小梁の接合構造であって、
大梁ウェブの少なくとも片面側に対向配置された一対の小梁支持金物がその小梁支持部間に小梁ウェブを上方から挿入できる挿入空間を形成するように、かつ小梁支持部と大梁上フランジ下面とが密着するように、当該一対の小梁支持金物の各々の大梁接合部が、小梁支持部における中心線より上方に偏心した位置において高力ボルトで大梁のウェブに締結され、
前記形成された挿入空間に上方から吊り下げられる小梁のウェブを挿入し、各々の小梁支持部の上端に小梁上フランジ下面を係止することにより小梁を大梁に接合することを特徴とする大梁と小梁の接合構造。
（３）（２）において、一対のＬ型の小梁支持金物が、小梁支持部の小梁上フランジ支持面を、大梁上フランジ側より高い段差面に形成したものであり、大梁上フランジ上面と小梁上フランジ上面が面一になっていることを特徴とする大梁と小梁の接合構造。
（４）（２）または（３）において、一対のＬ型の小梁支持金物が、大梁ウェブ両側の相対する位置に配置され、この小梁支持金物の大梁接合部が大梁ウェブに同じ高力ボルトで同時に締結され、この大梁ウェブ両側の一対の小梁支持金物の小梁支持部に、それぞれ小梁上フランジの下面が係止されていることを特徴とする大梁と小梁の接合構造。 In order to solve the above-described problems, the present invention has the following configurations (1) to ( 4 ).
(1) A large beam joint part fastened to the large beam web and a small beam support part projecting in the crossing direction from the side end of the large beam upper flange via an L-shaped small beam support metal that forms an L shape. A method for joining a small beam and a small beam that is suspended from above to a large beam,
A pair of small beam support hardware arranged opposite to at least one side of the large beam web forms an insertion space in which the small beam web can be inserted between the small beam support portions from above, and the small beam support portion and the large beam upper flange Each of the large beam joints of the pair of small beam support hardware is fastened to the large beam web with a high-strength bolt in advance at a position eccentric from the center line of the small beam support unit so that the lower surface is in close contact. ,
A beam of a beam that is suspended from above is inserted into the formed insertion space, and the beam is joined to the beam by locking the lower surface of the upper beam flange to the upper end of each beam support. This is a method for joining large beams and small beams.
(2) A large beam joint portion fastened to the large beam web and a small beam support portion protruding in a crossing direction from the side end of the large beam upper flange via an L-shaped small beam support hardware forming an L shape. It is a joint structure of a large beam and a small beam that joins a small beam suspended from above to the large beam,
A pair of small beam support hardware arranged opposite to at least one side of the large beam web forms an insertion space in which the small beam web can be inserted between the small beam support portions from above, and the small beam support portion and the large beam upper flange The large beam joint of each of the pair of small beam support hardware is fastened to the large beam web with a high-strength bolt at a position eccentric above the center line of the small beam support so that the lower surface is in close contact with the lower surface,
A beam of a beam that is suspended from above is inserted into the formed insertion space, and the beam is joined to the beam by locking the lower surface of the upper beam flange to the upper end of each beam support. The joint structure of large and small beams.
(3) In (2), the pair of L-shaped small beam support hardware is such that the small beam upper flange support surface of the small beam support part is formed on a stepped surface higher than the large beam upper flange side. A joint structure of a large beam and a small beam, characterized in that the upper surface and the upper surface of the flange on the small beam are flush.
(4) In (2) or (3), a pair of L-shaped small beam support hardware is arranged at opposite positions on both sides of the large beam web, and the large beam joint portion of the small beam support metal has the same high strength as the large beam web. A joint structure of a large beam and a small beam, wherein the lower surface of the upper beam flange is locked to the small beam support portions of a pair of small beam support hardware on both sides of the large beam web, which are fastened simultaneously with bolts .

本発明では、小梁を、大梁に接合した小梁支持金物との干渉を回避しながら大梁間に大梁と交叉するように垂直に吊り下げて、一対の小梁支持金物の小梁支持部間に形成の挿入空間に小梁ウェブを挿入し小梁支持部に上フランジを係止（載置・支持）させるので、溶接やボルト接合等の剛接合をすることなく容易にかつ円滑に接合でき、接合施工負担を軽減し、接合施工時間を短縮することができる。
本発明では、小梁支持金物を必要とするが、これらは例えば成形材（含む溝形鋼）からの切り出しやボルト孔（長孔と通常孔）の孔明けを主体とする比較的軽微な量産加工で安価に得られるものであり、大梁や小梁にガセットプレートを溶接しない接合構造であり、ガセットプレートの材料・加工・溶接を省略でき、接合施工コストを削減するとともに接合施工時間を短縮することができる。 In the present invention, the small beam is suspended vertically so as to cross the large beam between the large beams while avoiding interference with the small beam supporting hardware joined to the large beams, and between the small beam supporting portions of the pair of small beam supporting hardware. Because the small beam web is inserted into the formed insertion space and the upper flange is locked (placed / supported) to the small beam support part, it can be easily and smoothly joined without rigid joining such as welding or bolt joining. The joint construction burden can be reduced and the joint construction time can be shortened.
In the present invention, a small beam supporting metal is required, but these are relatively light mass production mainly including, for example, cutting from a molding material (including grooved steel) and drilling of bolt holes (long holes and normal holes). It can be obtained at low cost by machining, and it is a joint structure that does not weld gusset plates to large beams or small beams, which can eliminate the material, processing and welding of gusset plates, reducing joint construction cost and joint construction time be able to.

また、小梁と小梁支持金物は、高力ボルトや溶接などによる剛接合をしない係止（支持）構造で接合しているため接合施工が簡易である。また、小梁の支持により大梁に作用する曲げモーメントに対する圧縮力を増大して、支持を安定させることができる。
ここで、小梁支持金物と大梁ウェブを接合するボルト孔を、小梁支持金物の中心線より上側に偏心させた場合には、大梁に対する圧縮力作用領域を広くすることができる。
この場合、圧縮力作用領域のボルトを節減して、合理的で現実的な接合部を安価に実現でき、接合部性能を安定確保することができる。特に大梁ウェブの両側の相対する位置に小梁を接合する場合には、相対する方向からの圧縮力の作用で顕著な効果を奏する。 Further, since the small beam and the small beam supporting metal are joined by a locking (supporting) structure that does not perform rigid joining by high strength bolts or welding, the joining work is simple. Further, the support can be stabilized by increasing the compressive force against the bending moment acting on the large beam by supporting the small beam.
Here, when the bolt hole for joining the small beam support metal and the large beam web is eccentric to the upper side from the center line of the small beam support metal, the compressive force acting region on the large beam can be widened.
In this case, it is possible to reduce the bolts in the compressive force acting region, realize a reasonable and realistic joint at low cost, and ensure stable joint performance. In particular, when the small beams are joined at opposite positions on both sides of the large beam web, a remarkable effect is exerted by the action of the compressive force from the opposite direction.

本発明は、基本的には、例えばＨ形鋼梁とＨ形鋼梁、例えば、大きいサイズのＨ形鋼梁（本発明では、以下「大梁」という。）と、この大梁のＨ形鋼梁の側部に交叉（直交、斜め交叉を以下「交叉」という。）接合する大梁のＨ形鋼梁より小サイズのＨ形鋼梁（本発明では、以下「小梁」という。）を、大梁接合部（フランジ）と小梁支持部（ウェブ）を有する、基本形がＬ型（Ｌ型形状およびＬ型類似形状、以下「Ｌ型」という。）の小梁支持金物を介して接合する場合に適用するものである。
より具体的には、例えば、鉄骨建築物の床部や屋上部などを構築する場合に、大梁を、建て込み後の複数対の鉄骨柱間に設置（接合）して、隣合う大梁間に上方から小梁を直交するように吊り下げ所定の間隙（１０ｍｍ前後）を設けて配置・位置決めし、小梁をＬ型の小梁支持金物を介して大梁に接合する施工方法と接合構造として適用するものである。 The present invention basically includes, for example, an H-shaped steel beam and an H-shaped steel beam, for example, a large-sized H-shaped steel beam (hereinafter referred to as “large beam”), and the H-shaped steel beam of the large beam. An H-shaped steel beam (hereinafter referred to as a “small beam”) having a size smaller than that of the large beam H-shaped steel beam to be crossed (orthogonal, oblique crossing is hereinafter referred to as “crossing”) to the side portion of the large beam. In the case of joining via a beam support metal fitting having a joining part (flange) and a beam supporting part (web) and whose basic shape is L-shaped (L-shaped shape and L-shaped similar shape, hereinafter referred to as “L-shaped”). Applicable.
More specifically, for example, when constructing floors or rooftops of steel buildings, install (join) large beams between multiple pairs of steel columns after erection, and between adjacent large beams Applying as a construction method and joining structure that hangs the beam from above and arranges / positions it with a predetermined gap (around 10mm), and joins the beam to the beam via an L-shaped beam support To do.

本発明では、小梁を接合する大梁のウェブ側に、予め、一対のＬ型の小梁支持金物を、小梁支持部間に小梁ウェブを上方から挿入できる小梁ウェブ厚よりも大きい幅の挿入空間を形成するように対向配置し、大梁のウェブに大梁接合部を大梁のウェブに高力ボルトで締結しておく。
この状態の小梁支持金物の小梁支持部は、大梁上フランジの側端から交叉方向に突出する小梁上フランジの支持面（以下「小梁支持面」という。）を形成している。この小梁支持部の突出長さは、通常の場合、大梁上フランジ幅の１／４〜２／５程度あれば小梁を安定支持できる。
一方、大梁間に接合する小梁には、上方から交叉するように吊り下げ所定の間隙を設けて配置・位置決めする場合に、先端の下フランジが小梁支持金物の小梁支持部の小梁支持面と干渉しないように、予め下フランジの先端部を、前小梁支持面の突出長さ＋αの範囲内で切り欠いておく。 In the present invention, a pair of L-shaped small beam support hardware is previously provided on the web side of the large beam to which the small beam is joined, and the width larger than the thickness of the small beam web in which the small beam web can be inserted between the small beam support portions from above. Are arranged so as to form an insertion space, and a large beam joint is fastened to the large beam web with a high strength bolt.
The small beam support portion of the small beam support hardware in this state forms a support surface (hereinafter referred to as “small beam support surface”) of the small beam upper flange protruding in the cross direction from the side end of the large beam upper flange. If the protruding length of the small beam support portion is about 1/4 to 2/5 of the flange width on the large beam, the small beam can be stably supported.
On the other hand, when placing and positioning the small beams joined between the large beams with a predetermined gap suspended from above, the lower flange at the tip is the small beam of the small beam support part of the small beam support hardware. In order not to interfere with the support surface, the tip of the lower flange is cut out in advance within the range of the projection length + α of the front beam support surface.

小梁を、大梁間に上方から交叉するように垂直に吊り下げて円滑に且つ容易に配置・位置決めを行いながら、一対のＬ型の小梁支持金物の小梁支持部間に形成した挿入空間に小梁ウェブを挿入しながら、小梁上フランジを小梁支持部の小梁支持面に係止（本発明では載置・支持を意味し、以下「係止」という。）させることにより大梁間に小梁を容易に接合することができる。
本発明では、小梁支持金物を用いるが、この小梁支持金物と小梁は高力ボルト接合や溶接などの剛接合をしないので、接合施工負担を軽減して施工時間を短縮でき、接合施工コストを節減できる。
なお、小梁支持金物の小梁支持部の小梁支持面の長さを大梁上フランジの側端からの突出長さが、例えば大梁上フランジの幅の１／４未満の場合には、小梁に撓みを生じた場合に小梁を安定支持できない懸念が生じる。また、突出長さが、例えば大梁上フランジの幅の２／５を超える場合には、小梁支持金物の小梁支持強度が小さくなること、小梁支持金物のコスト負担や小梁下フランジ先端部の切欠加工負担が大きくなるなどの問題を生じる。 An insertion space formed between the small beam support portions of a pair of L-shaped small beam support hardware while suspending the small beam vertically so as to cross between the large beams and arranging and positioning smoothly and easily. While inserting the small beam web, the small beam upper flange is locked to the small beam supporting surface of the small beam supporting portion (in the present invention, it means mounting / supporting, hereinafter referred to as “locking”). Small beams can be easily joined between them.
In the present invention, a beam supporting metal is used, but the beam supporting metal and the beam are not rigidly bonded such as high-strength bolt bonding or welding. Cost can be saved.
Note that the length of the beam support surface of the beam support portion of the beam support hardware is less than 1/4 of the width of the beam upper flange, for example, when the protruding length from the side edge of the beam upper flange is less than 1/4. When bending occurs in the beam, there is a concern that the small beam cannot be supported stably. Further, when the protruding length exceeds 2/5 of the width of the upper beam upper flange, for example, the beam support strength of the beam support hardware is reduced, the cost burden of the beam support hardware and the end of the flange below the beam beam The problem that the notch processing burden of a part becomes large arises.

以下に本発明の実施形態例を図に基づき説明する。
［接合構造の実施形態例１］
図１（ａ）、（ｂ）は、本発明の接合施工方法によって、Ｈ形鋼梁からなる大梁１のウェブ１ｕの両側に、それぞれ、大梁１より小サイズのＨ形鋼梁からなる小梁２_１、２_２の一方の端部を、１対のＬ型の小梁支持金物４_１、４_２を介して接合して得られた大梁１と小梁２の接合構造の基本的な実施形態例１を、接合が完了した状態で部分的に示したものである。
この実施形態例１では、小梁２_１、２_２の上フランジ２ａの下面が大梁１の上フランジ１ａの下面と面一になるように、先端と大梁１のフランジ１ａの側端間に１０ｍｍ前後の間隙ｅを設け大梁１に対して直交配置している。
ここで、大梁１のウェブ１ｕの両側上部の相対する位置に、１対のＬ型の小梁支持金物４_１、４_２を配置し、この小梁支持金物４_１、４_２の大梁接合部（フランジ部）４ａを、大梁１のウェブ１ｕに１本の高力ボルト５で同時に締結し、小梁支持金物４_１、４_２の小梁支持部４ｂに、それぞれ小梁２_１、２_２の上フランジ２ａの下面を係止することにより大梁１と小梁２を接合している。
小梁支持金物４_１、４_２の大梁接合部（フランジ部）４ａの高力ボルト５の軸中心は、小梁支持部（ウェブ部）４ｂにおける中心線ｃから上側にｘ離れた位置に偏心させている。 Embodiments of the present invention will be described below with reference to the drawings.
[Embodiment Example 1 of Bonding Structure]
1 (a) and 1 (b) show a small beam made of an H-shaped steel beam having a size smaller than that of the large beam 1 on each side of the web 1u of the large beam 1 made of an H-shaped steel beam by the joining method of the present invention. Basic implementation of joining structure of large beam 1 and small beam 2 obtained by joining one end of 2 ₁ , 2 ₂ via a pair of L-shaped small beam supporting hardware 4 ₁ , 4 ₂ Embodiment 1 is partially shown in a state where joining is completed.
In the first embodiment, 10 mm is provided between the tip and the side edge of the flange 1a of the large beam 1 so that the lower surface of the upper flange 2a of the small beams 2 ₁ and 2 ₂ is flush with the lower surface of the upper flange 1a of the large beam 1. The front and rear gaps e are provided and arranged orthogonal to the large beam 1.
Here, the position facing the opposite sides top web 1u of girder 1, a pair of joists supporting hardware 4 ₁ of _L-type, 4 ₂ are arranged, the joists supporting hardware 4 _1, 4 ₂ girders joints the (flange portion) 4a, and fastened at the same time with a single high-strength bolts 5 to the web 1u girders 1, the joists supporting hardware ₄ 1, _{4 2} of the small beam support portion 4b, respectively joists ₂ 1, _{2 2} The large beam 1 and the small beam 2 are joined by locking the lower surface of the upper flange 2a.
The axial center of the high-strength bolt 5 of the large beam joint portion (flange portion) 4a of the small beam support hardware 4 ₁ , 4 ₂ is eccentric to a position x away from the center line c in the small beam support portion (web portion) 4b. I am letting.

小梁支持金物４_１（４_２）は、図１（ｃ）に示すように、大梁接合部（フランジ部）４ａと小梁支持部（ウェブ部）４ｂを有するＬ型に形成されたもので、大梁接合部４ａには大梁１のウェブ１ｕに高力ボルト接合するためのボルト孔４ｏを有し、小梁支持部４ｂは小梁２_１、２_２の上フランジ２ａの支持面（以下「小梁支持面１１」という。）を形成している。
小梁支持金物４_１、４_２は、大梁１の上フランジ１ａとウェブ１ｕの境界部で角部を切り欠いて、大梁接合部４ａと大梁１のウェブ１ｕおよび小梁支持部４ｂと大梁１の上フランジ１ａ下面とを安定的に密着させるようにしている。
この小梁支持金物４_１、４_２は、予め、大梁１のウェブ１ｕの両側の相対する位置に、図１（ｂ）に示すように、小梁支持部４ｂと４ｂが相対して小梁２_１、２_２のウェブ２ｕの挿入空間ａを形成するように配置し、大梁１のウェブ１ｕの両側の相対する位置の小梁支持金物４_１、４_２の大梁接合部４ｂを高力ボルト５で接合しておく。この状態では、小梁支持部４ｂは、大梁１の上フランジ１ａの側端から直交方向に大梁１のフランジ幅の１／４〜２／５程度の突出長さＬｓを有する小梁支持面１１を形成している。
一方、大梁１に接合する小梁２_１、２_２は、図１（ａ）に示すように、先端部の下フランジ２ｂを一部切り欠いている。この切欠２ｋは、大梁１間に小梁２を吊り下げ直交配置するとき、大梁１の上フランジ２ａの側端から突出した小梁支持部４ｂの小梁支持面１１と干渉を回避するためのものである。この切欠２ｋの幅ｉは、小梁支持部４ａの小梁支持面１１の突出長さＬｓと同程度である。 As shown in FIG. 1 (c), the small beam support metal 4 ₁ (4 ₂ ) is formed in an L shape having a large beam joint portion (flange portion) 4a and a small beam support portion (web portion) 4b. The large beam joint portion 4a has a bolt hole 4o for high-strength bolt connection to the web 1u of the large beam 1, and the small beam support portion 4b is a support surface of the upper flange 2a of the small beams 2 ₁ and 2 ₂ (hereinafter referred to as “ A beam support surface 11 ").
The small beam support hardware 4 ₁ , 4 ₂ has a corner portion cut out at the boundary between the upper flange 1 a of the large beam 1 and the web 1 u, and the large beam joint 4 a, the web 1 u of the large beam 1, the small beam support 4 b, and the large beam 1. The lower surface of the upper flange 1a is stably brought into close contact.
As shown in FIG. 1 (b), the small beam support hardware 4 ₁ , 4 ₂ is preliminarily placed at the opposite positions on both sides of the web 1 u of the large beam 1 so that the small beam support portions 4 b and 4 b face each other. 2 ₁ and 2 ₂ are arranged so as to form the insertion space a of the web 2 u, and the small beam support metal parts 4 ₁ and 4 ₂ at the opposite positions on both sides of the web 1 u of the large beam ₁ are connected to the high beam bolts 4 b. 5 to join. In this state, the small beam support portion 4b has a small beam support surface 11 having a protruding length Ls of about ¼ to 2/5 of the flange width of the large beam 1 in the orthogonal direction from the side end of the upper flange 1a of the large beam 1. Is forming.
On the other hand, as shown in FIG. 1A, the small beams 2 ₁ and 2 ₂ to be joined to the large beam 1 are partially cut away from the lower flange 2b of the tip portion. This notch 2k is used to avoid interference with the small beam support surface 11 of the small beam support portion 4b protruding from the side end of the upper flange 2a of the large beam 1 when the small beam 2 is suspended and arranged orthogonally between the large beams 1. Is. The width i of the notch 2k is approximately the same as the protruding length Ls of the beam supporting surface 11 of the beam supporting portion 4a.

この実施形態例１では、図１（ａ）に示すように、大梁１のウェブ１ｕのに両側の相対する位置に高力ボルト５で同時締結された一対の小梁支持金物４_１、４_２の小梁支持部４ｂの上端に、小梁２_１、２_２の上フランジ２ａを係止することにより、大梁１に小梁２_１、２_２を接合するものである。
小梁支持部４ｂと小梁２_１、２_２の接合は係止によるもので、高力ボルトや溶接による剛接合とは異なる。すなわち、小梁２_１、２_２の上フランジ２ａ、２ａは小梁支持部４ｂの小梁支持面１１に係止し、小梁２_１、２_２の長さ方向では、例えば間隙ｅの範囲で変位可能ではあるが、大梁１の長さ方向では、小梁支持部４ｂ間の挿入空間ａ内で拘束される。通常は、小梁２のフランジ２ａ下面と小梁支持面１１の摩擦抵抗で動くことはない。 In the first embodiment, as shown in FIG. 1 (a), a pair of small beam supporting hardware 4 ₁ , 4 ₂ simultaneously fastened with high-strength bolts 5 at opposite positions on both sides of the web 1u of the large beam 1 The small beams 2 ₁ and 2 ₂ are joined to the large beams 1 by engaging the upper flanges 2a of the small beams 2 ₁ and 2 _{2 with} the upper ends of the small beam support portions 4b.
The joining of the beam support part 4b and the beams 2 ₁ and 2 ₂ is based on locking, and is different from rigid joining by high strength bolts or welding. In other words, the upper flanges 2a and 2a of the beam 2 ₁ and 2 ₂ are locked to the beam support surface 11 of the beam support 4b, and in the length direction of the beams 2 ₁ and 2 ₂ , for example, the range of the gap e However, in the length direction of the large beam 1, it is restrained in the insertion space a between the small beam support portions 4b. Usually, it does not move due to the frictional resistance between the lower surface of the flange 2a of the beam 2 and the beam support surface 11.

この実施形態例１では、大梁１間に上方から小梁２_１（２_２）を直交するように吊り下げて配置・位置決めを円滑に且つ容易に行いながら、一対の小梁支持金物４の小梁支持部４ｂ間に形成した挿入空間ａに小梁２_１、２_２のウェブ２ｕを挿入し、小梁２_１、２_２の上フランジ２ａを小梁支持部４ｂの小梁支持面１１で支持させ、ウェブ２ｕを小梁支持部４ｂ間に挿入・係止することにより、大梁１間に小梁２_１、２_２を容易に接合することができる。
したがって、例えば高力ボルトによる剛接合を省略でき、位置合わせの簡易化、締結作業負担の大幅低減などが可能である。また、実施形態例１では、大梁１のウェブ１ｕの両側の相対する位置に小梁２_１、２_２を接合するものであり、小梁支持金物４_１、４_２の大梁接合部４ａを大梁１のウェブ１ｕの両側の相対する位置に１本の高力ボルト５で同時締結しているため、ボルト本数の節減、位置合わせの簡易化、締結作業負担の大幅低減などが可能である。 In the first embodiment, the small beams 2 ₁ (2 ₂ ) are suspended from above between the large beams 1 so as to be arranged and positioned smoothly and easily. The web 2u of the small beams 2 ₁ and 2 ₂ is inserted into the insertion space a formed between the beam support portions 4b, and the upper flanges 2a of the small beams 2 ₁ and 2 ₂ are placed on the small beam support surface 11 of the small beam support portion 4b. By supporting and inserting and locking the web 2u between the small beam support portions 4b, the small beams 2 ₁ and 2 ₂ can be easily joined between the large beams 1.
Therefore, for example, rigid joining with high-strength bolts can be omitted, and it is possible to simplify alignment and greatly reduce the burden of fastening work. In the first embodiment, the small beams 2 ₁ and 2 ₂ are joined to opposite positions on both sides of the web 1 u of the large beam ₁ , and the large beam joint portion 4 a of the small beam supporting hardware 4 ₁ and 4 _{2 is connected to} the large beam. Since one high-strength bolt 5 is simultaneously fastened at opposite positions on both sides of one web 1u, it is possible to reduce the number of bolts, simplify positioning, and greatly reduce the burden of fastening work.

さらに、ここでは大梁１と小梁支持金物４_１、４_２の大梁接合部（フランジ部）を締結の高力ボルト５のボルト孔４ｏ中心が、小梁支持金物４_１、４_２の中心線ｃから上側にｘ離れた位置に偏心しているため、図２（ａ）に、大梁１の一方の側で概念的に示すように、大梁１のウェブ１ｕから距離ｄの位置で、小梁２（２_１、２_２）に矢印方向の荷重（力）Ｑが付与されたとき、小梁２から小梁支持金物４、高力ボルト経由で伝達される引張力により大梁１に生じる曲げモーメント（Ｍ＝Ｑ・ｄ）に対する圧縮力を増大させて支持を安定させることができる。
すなわち、引張力が作用する高力ボルト５の中心から圧縮力が作用する下部領域の中心までの距離Ｖを大きくすることによって、圧縮力作用領域を広くして大梁１に作用する圧縮力を分散することによって、大梁１のウェブ１ｕでの圧縮力に対する反力を大きくし、曲げモーメント（Ｍ＝Ｑ・ｄ）に対する圧縮力を大きくすることができる。
ここでいう圧縮力作用領域とは、図２（ａ）で、大梁１に小梁支持金物４を接合した高力ボルト５（ボルト孔）より下側の大梁１と小梁支持金物４の当接領域をいう。
なお、高力ボルト５のボルト孔４ｏ中心を、図２（ａ）に示すように小梁支持金物４_１、４_２の中心線ｃから上側にｘ離れた位置に偏心させる場合に、例えば図２（ｂ）に示すように小梁支持部４_１、４_２の一部をカットした形状の小梁支持金物４αを用いることも考慮できる。 Further, where small beam support hardware 4 ₁ and girders _1, 4 girders junction ₂ bolt holes 4o center of high-strength bolts 5 (flange portion) of the fastening is small beam support hardware 4 _1, 4 ₂ centerlines Since it is eccentric to a position x away from c, the beam 2 is positioned at a distance d from the web 1u of the beam 1u as shown conceptually on one side of the beam 1 in FIG. When a load (force) Q in the direction of the arrow is applied to (2 ₁ , 2 ₂ ), the bending moment generated in the large beam 1 by the tensile force transmitted from the small beam 2 via the small beam support metal 4 and the high strength bolt ( The support can be stabilized by increasing the compression force for M = Q · d).
That is, by increasing the distance V from the center of the high-strength bolt 5 on which the tensile force acts to the center of the lower region on which the compressive force acts, the compressive force acting on the large beam 1 is dispersed by widening the compressive force acting region. By doing so, the reaction force with respect to the compressive force in the web 1u of the large beam 1 can be increased, and the compressive force with respect to the bending moment (M = Q · d) can be increased.
The compressive force acting region here refers to the contact between the large beam 1 and the small beam support metal 4 below the high strength bolt 5 (bolt hole) in which the small beam support metal 4 is joined to the large beam 1 in FIG. The contact area.
When the center of the bolt hole 4o of the high-strength bolt 5 is decentered at a position x away from the center line c of the small beam support hardware 4 ₁ , 4 ₂ as shown in FIG. As shown in FIG. 2 (b), it is also possible to consider using a beam supporting metal 4α having a shape obtained by cutting a part of the beam supporting portions 4 ₁ , 4 ₂ .

なお、この実施形態例１では、一対の小梁支持金物４_１、４_２を大梁１のウェブ１ｕの両側の相対する位置に同じ高力ボルト５で同時締結し、それぞれの小梁支持金物４_１、４_２に小梁２_１、２_２を接合しているが、これは必須条件ではない。例えば、大梁１のウェブ１ｕの両側の相対しない位置または大梁１のウェブ１ｕの一方の側のみに、小梁支持金物を個別に接合して、大梁１のウェブ１ｕの一方の側のみに小梁を接合することもある。 In the first embodiment, the pair of small beam support hardware 4 ₁ , 4 ₂ are simultaneously fastened to the opposing positions on both sides of the web 1 u of the large beam 1 with the same high-strength bolt 5, and each small beam support metal 4 _{Although the} small beams 2 ₁ and 2 ₂ are joined to ₁ and 4 ₂ , this is not an essential condition. For example, the small beam supporting hardware is individually joined to the non-opposing positions on both sides of the web 1u of the large beam 1 or to only one side of the web 1u of the large beam 1, and the small beam is only bonded to one side of the web 1u of the large beam 1. May be joined .

［接合施工方法の実施形態例］
例えば、図１（ａ）、（ｂ）、（ｃ）の接合構造を得るための接合施工方法例について、図３（ａ）、（ｂ）に基づいてより具体的に説明する。
図３（ａ）、（ｂ）は、大梁１のウェブ１ｕの両側の相対する位置に一対の小梁支持金物４_１、４_２を１本の高力ボルト５で締結して、小梁支持金物４_１の小梁支持部４ａに、小梁２_１を係止接合した後、例えばクレーンを用いて小梁２_２を上方から大梁１の側方に、上方から大梁１と直交するように垂直に吊り下げて、先端と大梁１の上フランジ１ａの側端との間に所定の間隙ｅを生じるように配置する状態を示している。 [Example embodiment of joining method]
For example, an example of a joining method for obtaining the joining structure shown in FIGS. 1A, 1B, and 1C will be described more specifically based on FIGS. 3A and 3B.
3 (a) and 3 (b) show that a pair of small beam support hardware 4 ₁ , 4 ₂ is fastened with a single high-strength bolt 5 at opposite positions on both sides of the web 1u of the large beam 1 to support the small beam. the small beam support portion 4a of the hardware 4 _1, after locking joining joists 2 _1, for example on the side of the girder 1 the joists 2 ₂ from above with a crane, to be perpendicular from the upper girder 1 It shows a state where it is suspended vertically and arranged so as to generate a predetermined gap e between the tip and the side end of the upper flange 1a of the large beam 1.

本発明の接合施工方法は、例えば、
（１）予め鉄骨柱に設置する前の大梁１のウェブ１ｕの両側の相対する位置に、図１（ｃ）に示すような小梁支持金物４_１、４_２の大梁接合部４ａを１本の高力ボルト５で締結しておく。
この小梁支持金物４_１、４_２は、図３（ｂ）に示すように、それぞれに、大梁１のウェブ１ｕに、小梁支持部４ｂが相対するように配置され、この小梁支持部４ｂ間に小梁２_２ウェブ２ｕの挿入空間ａを形成する一対の梁支持金物４_２と４_２（４_１と４_２）からなり、大梁１に接合した状態で、小梁支持部４ｂが大梁１の上フランジ１ａの側端から突出長さＬｓで突出しており、小梁２_２の上フランジ２ａの下面を支持する小梁支持面１１を形成している。
（２）予め小梁２_２の下フランジ２ｂ先端をｉの範囲で切り欠いておく。ここでウェブ２ａの端部は斜めの切欠面を有している。
この切欠２ｋは、小梁２_２を、先端と大梁１の側部間に間隙ｅを維持しながら大梁１と直交する方向に吊り下げて行くとき、小梁２_２の下フランジ２ｂの端部が、大梁１のウェブ１ｕに接合した小梁支持金物４_２の小梁支持部４ｂの小梁支持面１１と干渉しないようにするためである。
ここで、ウェブ２ａの斜めの切欠面は、小梁２_２を吊り下げて行くとき、大梁１のフランジ１ａの側端に接してもガイドの役割をして、小梁２_２の位置合わせを円滑にすることができる。 The joining construction method of the present invention is, for example,
(1) One large beam joint 4a of the small beam support hardware 4 ₁ , 4 ₂ as shown in FIG. 1 (c) is provided at opposite positions on both sides of the web 1u of the large beam 1 before being installed on the steel column in advance. The high-strength bolt 5 is used for fastening.
As shown in FIG. 3 (b), the small beam support hardware 4 ₁ and 4 ₂ are arranged so that the small beam support portion 4b faces the web 1u of the large beam 1, respectively. pair of beams supporting hardware _{4 2} forming the insertion space a small beam _{2 second} web 2u between 4b and ₄ 2 _{(4 1} and _{4 2)} consists, in a state of being bonded to the girders 1, small beam support portion 4b girder projects in protruding length Ls from the side end of the upper flange 1a of the 1, to form a small beam support surface 11 for supporting the lower surface of the joists 2 ₂ on the upper flange 2a.
(2) keep notching advance joists 2 ₂ of the lower flange 2b tip in the range of i. Here, the end of the web 2a has an oblique cut surface.
The notch 2k is the joists 2 _2, when going hung in a direction perpendicular to the girder 1 while maintaining a gap e between the tip and the girder 1 side, the ends of the joists 2 ₂ of the lower flange 2b but in order to avoid interference with the joists supporting surface 11 of the small beam support hardware 4 _second small beam support portion 4b joined to the girder 1 web 1u.
Here, truncated face of the oblique webs 2a, when going suspended joists 2 _2, and the role guide in contact with the side edge of the flange 1a of the girder 1, the joists 2 ₂ alignment It can be smooth.

（３）図３（ａ）、（ｂ）の状態では、小梁２_２のウェブ２ｕが一対の小梁支持金物４_２と４_２の小梁支持部４ｂ間の挿入空間ａに挿入され、横方向の移動が適度に拘束されガイドされた状態にあるため、小梁２_２を、この状態から上フランジ２ａの下面が小梁支持部４ｂの小梁支持面１１で支持されるまで吊り下ろす。
なお、小梁２_１も、上記小梁２_２の場合と同様にして大梁１に接合したものである。小梁２_１と小梁２_２の接合は、同時的に行ってもよいし、時間をずらして行ってもよい。
このような接合施工方法（例）によって、図１（ａ）、（ｂ）に示すような大梁１と小梁２_１、２_２の接合構造を得ることができる。 (3) FIG. 3 (a), in the state of (b), the small beam _{2 second} web 2u is inserted into the insertion space a between a pair of joists supporting hardware _{4 2} and _{4 2} of the small beam support portion 4b, since the lateral movement is in the moderately constrained guide state, the joists 2 _2, down hanging to the bottom surface of the top flange 2a is supported by the beams supporting surface 11 of the small beam support portion 4b from the state .
Incidentally, joists 2 ₁ is also obtained by bonding the same procedure as that in the joists 2 ₂ girder 1. Joists 2 ₁ and joists 2 ₂ bonding may be performed simultaneously, may be performed at different times.
By such a joining method (example), a joining structure of the large beam 1 and the small beams 2 ₁ and 2 ₂ as shown in FIGS. 1A and 1B can be obtained .

［接合構造の実施形態例２］
図４（ａ）、（ｂ）は、基本的には、前記本発明の接合施工方法の実施形態例によって、大梁１のウェブ１ｕの両側の相対する位置に、それぞれ、大梁１より小サイズの小梁２_１、２_２の一方の端部を、１対のＬ型の小梁支持金物４_１、４_２を介して接合して得られた、大梁と小梁の接合構造の実施形態例２を接合が完了した状態で部分的に示したものである。
この実施形態例２では、小梁２_１、２_２の上フランジ２ａの上面が大梁１の上フランジ１ａの上面と面一にするために、図４（ｃ）に示すように、１対のＬ型の小梁支持金物４_３、４_４の小梁支持部４ｂの小梁支持面１１を、大梁１上フランジ１ａ側よりｙ分高い段差面に形成した点で、実施形態例１と異なるものである。
実施形態例１と共通する部分については説明を省略する。 [Second Embodiment of Joining Structure]
4 (a) and 4 (b) are basically smaller in size than the large beam 1 at opposite positions on both sides of the web 1u of the large beam 1 according to the embodiment of the joining method of the present invention. Embodiment example of joint structure of large beam and small beam obtained by joining one end of small beam 2 ₁ , 2 ₂ via a pair of L-shaped small beam support hardware 4 ₁ , 4 ₂ 2 is partially shown in a state where the joining is completed.
In the second embodiment, since the upper surface of the upper flange 2a of the small beams 2 ₁ and 2 ₂ is flush with the upper surface of the upper flange 1a of the large beam 1, as shown in FIG. The difference from Embodiment 1 is that the small beam support surface 11 of the small beam support portion 4b of the L-shaped small beam support hardware 4 ₃ , 4 ₄ is formed on a step surface that is higher by y than the large beam 1 upper flange 1a side. Is.
A description of portions common to the first embodiment is omitted .

［接合構造の実施形態例３］
図５（ａ）〜（ｅ）は、本発明の接合施工方法によって、大梁１のウェブ１ｕの両側の部分的に相対する位置に、大梁１よりサイズの小さい、せいの異なる小梁２_１、小梁２_３の一方の端部を、形状、サイズの異なるＬ型の小梁支持金物４_１、４_５を介して、小梁２_１、２_３の上フランジ２ａの下面が大梁１の上フランジ１ａの下面と面一に接合して得られた大梁と小梁の接合構造の実施形態例３を接合が完了した状態で部分的に示したものである。
この実施形態例３では、異なるＬ型の小梁支持金物４_１、４_５を用いて、大梁１のウェブ１ｕの両側にせいの異なる小梁２_１と小梁２_３を接合する点で実施形態例１、２と異なるものである。実施形態例１、２と共通する部分については説明を省略する。 [Third Embodiment of Joining Structure]
5 (a) to 5 (e) show a small beam 2 _{1 having} a smaller size than the large beam ₁ and having different sizes, at partially opposed positions on both sides of the web 1u of the large beam 1 by the joining method of the present invention. one end of the beams 2 _3, shape, through the L-type small beam support hardware 4 _1, 4 ₅ of different sizes, joists 2 _1, the lower surface of the 2 ₃ on the upper flange 2a is on the girder 1 FIG. 9 is a partial view of a third embodiment of a joining structure of a large beam and a small beam obtained by joining the lower surface of the flange 1a flush with each other in a state where the joining is completed.
In this third embodiment, different L-shaped beam support hardware 4 ₁ , 4 ₅ is used to join the different beam 2 ₁ and beam 2 ₃ on both sides of the web 1 u of the large beam _1. This is different from the first and second embodiments. A description of portions common to the first and second embodiments is omitted.

この実施形態例３では、図５（ｄ）に示すような実施形態例１と同様の小梁支持金物４_１と、図５（ｅ）に示すように、大梁接合部４ａに縦列２個のボルト孔４ｏを有する小梁支持金物４_５を用いるものである。
小梁支持金物４_１と小梁支持金物４_５は、大梁１のウェブ１ｕの両側で一部相対する位置に配置して、小梁支持金物４_１の大梁接合部４ａと小梁支持金物４_５の大梁接合部４ａの上部側を同じ高力ボルト５で同時締結し、小梁支持金物４_５の大梁接合部４ａの下部側を別の高力ボルト５で締結する。
小梁支持金物４_１の小梁支持部４ｂの小梁支持面１１には小さいサイズの小梁２_１を係止接合し、小梁支持金物４_５の小梁支持部４ｂの小梁支持面には中間サイズの小梁２_３を係止して接合するものである。 In the embodiment 3, as in the first embodiment the beams supporting hardware 4 ₁ similar to the shown in FIG. 5 (d), as shown in FIG. 5 (e), column two to girder joints 4a is to use a small beam support hardware 4 ₅ having a bolt hole 4o.
Joists supporting hardware 4 ₁ and the beams supporting hardware 4 ₅ are disposed on a portion opposite positions on both sides of the girder 1 web 1u, joists supporting hardware 4 ₁ girders junction 4a and the small beam support hardware 4 the upper side of the girders joints 4a of ₅ to simultaneous engagement with the same high-strength bolts 5, for fastening in a different high strength bolts 5 the lower side of the girder joints 4a of joists supporting hardware 4 _5.
The joists 2 ₁ of small size in small beam support surface 11 of the small beam support hardware 4 ₁ of joists supporting portion 4b and locking joint, the small beam support surface of the small beam support portion 4b of the joists supporting hardware 4 ₅ in is to join the joists 2 ₃ intermediate sized engagement locks in.

この実施形態例３では、実施形態例１と同様の効果に加えて、要求される強度の異なる小梁を、要求される接合部強度に応じた接合条件で同時的に大梁に接合することができ、本発明の適用幅を拡大することができる。
また、この実施形態例３では、大梁１の下フランジ１ｂの上面と小梁２_１の先端、および大梁１の下フランジ１ｂの上面と小梁２_３の先端間に形成された空間８に、各種ケーブルやホースの収納ダクト、排気ダクトなどのダクト９を安定的に配設することができる。このことは上記各実施形態例１、２でも同様である。 In the third embodiment, in addition to the same effects as in the first embodiment, the small beams having different required strengths can be simultaneously bonded to the large beams under the bonding conditions according to the required joint strength. And the application range of the present invention can be expanded.
Further, in the embodiment 3, the upper surface and the joists 2 ₁ of the tip of the lower flange 1b of the girders 1, and the space 8 formed between the upper surface and the joists 2 ₃ of the tip of the lower flange 1b of the girder 1, Ducts 9 such as various cables, hose storage ducts and exhaust ducts can be stably disposed. This is the same in the first and second embodiments .

本発明は、上記の実施形態例の内容に限定されるものではない。接合対象の大梁、小梁、小梁支持金物の各条件、高力ボルトの種類、本数、配置、座金の使用の有無、接合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。 The present invention is not limited to the contents of the above embodiment. For each condition of large beam, small beam, and beam support hardware to be joined, high-strength bolt type, number, number, placement, use of washer, joining procedure, etc. Depending on the performance of the joint, etc., there is a change within a range that satisfies the above claims.

（ａ）図は、本発明の大梁と小梁の接合構造の実施形態例１で接合が完了した状態を示す一部断面正面説明図、（ｂ）図は、（ａ）図の一部断面側面説明図、（ｃ）図は、実施形態例１で用いた小梁支持金物の形状例を示す立体説明図。(A) The figure is a partial cross-sectional front explanatory view showing a state in which the joining is completed in Embodiment 1 of the joining structure of the large beam and the small beam of the present invention, (b) The figure is a partial sectional view of (a) figure Side surface explanatory drawing and (c) figure are solid explanatory drawings which show the example of a shape of the small beam support metal fitting used in Example 1 of Embodiment. （ａ）図は、本発明の接合構造で小梁に荷重（力）が付与された場合の小梁−小梁支持金物−大梁間の応力伝達と曲げモーメント発生状態例を示す模式図（正面説明図）、（ｂ）図は、（ａ）図の小梁支持金物に近い作用効果を有する他の小梁支持金物の形状例を示す平面説明図。FIG. 5A is a schematic diagram showing an example of stress transmission between a small beam, a small beam supporting hardware, and a large beam and a bending moment generation state when a load (force) is applied to the small beam in the joint structure of the present invention. (Explanation drawing), (b) figure is plane explanatory drawing which shows the example of a shape of the other beam supporting metal which has the effect similar to the beam supporting metal of (a) figure. （ａ）図は、図１の大梁と小梁の接合構造の実施形態例１に基づく接合施工方法（手順）例を示す一部断面正面説明図、（ｂ）図は、（ａ）図のＡａ−Ａｂ矢視断面説明図。(A) The figure is a partially sectional front explanatory view showing an example of a joining construction method (procedure) based on Embodiment Example 1 of the joining structure of the large beam and the small beam in FIG. 1, and (b) is a diagram of FIG. Aa-Ab arrow directional cross-sectional explanatory drawing. （ａ）図は、本発明の大梁と小梁の接合構造の実施形態例２で、接合が完了した状態を示す一部断面正面説明図、（ｂ）図は、（ａ）図の一部断面側面説明図、（ｃ）図は、実施形態例２で用いた小梁支持金物の形状例を示す立体説明図。(A) The figure is a partial cross-sectional front explanatory view showing a state in which the joining is completed in Embodiment 2 of the joining structure of the large beam and the small beam of the present invention, and (b) is a part of FIG. Sectional side explanatory drawing, (c) figure is a three-dimensional explanatory drawing which shows the example of a shape of the beam supporting metal used in Example 2 of Embodiment. （ａ）図は、本発明の大梁と小梁の接合構造の実施形態例３で、接合が完了した状態を示す一部断面正面説明図、（ｂ）図は、（ａ）図のＢａ−Ｂｂ矢視断面説明図。(A) The figure is a partial cross-sectional front explanatory view showing a state in which the joining is completed in Embodiment 3 of the joining structure of the large beam and the small beam of the present invention, and (b) is a view of Ba- in FIG. Bb arrow section explanatory drawing. （ｃ）図は、（ａ）図のＣａ−Ｃｂ矢視断面説明図、（ｄ）図は、実施形態例３で用いた一方の小梁支持金物の形状例を示す立体説明図、（ｅ）図は、実施形態例３で用いた他方の小梁支持金物の形状例を示す立体説明図。(C) The figure is a cross-sectional explanatory view taken along the line Ca-Cb of (a), (d) the figure is a three-dimensional explanatory view showing an example of the shape of one beam supporting metal used in the third embodiment, (e The figure is a three-dimensional explanatory view showing an example of the shape of the other beam supporting metal used in the third embodiment. 本発明を適用する鉄骨建築物の大梁と小梁の高力ボルト接合部位例を示す平面説明図。Plane | planar explanatory drawing which shows the example of the high strength volt | bolt joining site | part of the big beam and small beam of a steel frame to which this invention is applied. （ａ）図は、従来の大梁と小梁の高力ボルト接合部構造例を示す一部断面正面説明図、（ｂ）図は、（ａ）図の一部断面側面説明図。(A) The figure is a partial sectional front explanatory view showing an example of a conventional high-strength bolt joint structure of a large beam and a small beam, (b) Figure is a partial sectional side explanatory view of (a) figure. （ａ）図は、従来の大梁と小梁の高力ボルト接合部構造の他の例を示す一部断面正面説明図、（ｂ）図は、（ａ）図の一部断面側面説明図。(A) A figure is a partial cross section front explanatory drawing which shows the other example of the conventional high strength bolt joint structure of a big beam and a small beam, (b) figure is a partial cross section side explanatory drawing of (a) figure.

Explanation of symbols

１大梁１ａ上フランジ
１ｂ下フランジ１ｕウエブ
１ｏボルト孔２、２_１、２_２、２_３小梁
２ａ上フランジ２ｂ下フランジ
２ｕウェブ２ｋ切欠
４、４_１、４_２、４_３、４_４、４_５、４α 小梁支持金物
４ａ大梁接合部４ｂ小梁支持部
４ｏボルト孔５高力ボルト
６ナット７座金
８空間９ダクト
ａ挿入空間（小梁ウェブ用）ｅ大梁と小梁間の間隙
ｃ小梁支持金物の中心線
ｘ偏心（ｃと高力ボルト軸中心間）
ｙ小梁支持面の段差Ｌ小梁支持部の長さ
Ｌｓ小梁支持面の長さｉ切欠幅
１１小梁支持面
（従来例）
３、３_１ガセットプレート３ａボルト接合部
１０添板
Ｐ鉄骨柱 1 Large beam 1a Upper flange 1b Lower flange 1u Web 1o Bolt hole 2, 2 ₁ , 2 ₂ , 2, ₃ Small beam 2a Upper flange 2b Lower flange 2u Web 2k Notch 4, 4 ₁ , 4 ₂ , 4 ₃ , ₄ , 4 ₅ 4α Beam support metal 4a Large beam joint 4b Beam support 4o Bolt hole 5 High strength bolt 6 Nut 7 Washer 8 Space 9 Duct a Insertion space (for small beam web) e Gap between large beam and small beam c Small beam Centerline of support hardware x Eccentricity (between c and high-strength bolt shaft center)
y Step height of beam support surface L Length of beam support portion Ls Length of beam support surface i Notch width 11 Beam support surface (conventional example)
3, 3 ₁ Gusset plate 3a Bolt joint 10 Attachment plate P Steel column

Claims

  From the upper side between the large beams via the L-shaped small beam support hardware, in which the large beam joint part fastened to the web of the large beam and the small beam support part protruding in the crossing direction from the side end of the upper beam upper flange form an L shape. A method for joining a small beam and a small beam to join a suspended beam to a large beam,
  A pair of small beam support hardware arranged opposite to at least one side of the large beam web forms an insertion space in which the small beam web can be inserted between the small beam support portions from above, and the small beam support portion and the large beam upper flange Each of the large beam joints of the pair of small beam support hardware is fastened to the large beam web with a high-strength bolt in advance at a position eccentric from the center line of the small beam support unit so that the lower surface is in close contact. ,
  A beam of a beam that is suspended from above is inserted into the formed insertion space, and the beam is joined to the beam by locking the lower surface of the upper beam flange to the upper end of each beam support. This is a method for joining large beams and small beams.

  From the upper side between the large beams via the L-shaped small beam support hardware, in which the large beam joint part fastened to the web of the large beam and the small beam support part protruding in the crossing direction from the side end of the upper beam upper flange form an L shape. It is a joint structure of a large beam and a small beam that joins a suspended small beam to a large beam,
  A pair of small beam support hardware arranged opposite to at least one side of the large beam web forms an insertion space in which the small beam web can be inserted between the small beam support portions from above, and the small beam support portion and the large beam upper flange The large beam joint of each of the pair of small beam support hardware is fastened to the large beam web with a high-strength bolt at a position eccentric above the center line of the small beam support so that the lower surface is in close contact with the lower surface,
  A beam of a beam that is suspended from above is inserted into the formed insertion space, and the beam is joined to the beam by locking the lower surface of the upper beam flange to the upper end of each beam support. The joint structure of large and small beams.

A pair of L-shaped small beam support hardware is formed by forming the beam upper flange support surface of the beam support portion on a stepped surface higher than the beam upper flange side, and the beam upper flange upper surface and beam upper flange upper surface are The joint structure of a large beam and a small beam according to claim 2, wherein the structure is flush.

A pair of L-shaped small beam support hardware is arranged at opposite positions on both sides of the large beam web, and the large beam joints of the small beam support metal are simultaneously fastened to the large beam web with the same high-strength bolt, and the lower surface of the upper beam flange 4. The joint structure of a large beam and a small beam according to claim 2 or 3, wherein the structure is locked to a small beam support portion of a pair of small beam support hardware bonded to both sides of the large beam web.