JP5035984B2 - Joint structure of precast floor slab and beam - Google Patents

Joint structure of precast floor slab and beam Download PDF

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JP5035984B2
JP5035984B2 JP2007333363A JP2007333363A JP5035984B2 JP 5035984 B2 JP5035984 B2 JP 5035984B2 JP 2007333363 A JP2007333363 A JP 2007333363A JP 2007333363 A JP2007333363 A JP 2007333363A JP 5035984 B2 JP5035984 B2 JP 5035984B2
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reinforcing bar
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JP2009155850A (en
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治克 角屋
聡 村山
光博 吉田
裕哉 諏訪
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岡部株式会社
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本発明は、主として鉄骨構造物(S造)に採用されるプレキャスト床版と梁との接合構造に関する。   The present invention relates to a joint structure between a precast floor slab and a beam mainly employed in a steel structure (S structure).

鉄骨構造物(S造)や鉄筋コンクリート構造物(RC造)を施工する場合、コンクリートを現場打ちで施工する方法と、プレキャストコンクリート部材を予め工場製作し、これらを現場に搬入して組み立てる方法とに概ね大別される。   When constructing a steel structure (S structure) or a reinforced concrete structure (RC structure), there are a method of constructing concrete on-site and a method of pre-fabricating precast concrete members in advance and bringing them into the site for assembly. Broadly divided.

プレキャスト工法は、柱、梁、床版といった主要構造部材を上述したように工場で製作し、これらを現場に搬入し組み立てることにより、施工能率を大幅に改善することができるため、急速施工が要求される場合には、後者のプレキャスト工法が数多く採用されているとともに、最近では、30階を超える高層集合住宅にも数多く採用されるようになってきた。   The precast method requires rapid construction because the main structural members such as columns, beams, and floor slabs are manufactured at the factory as described above, and these can be carried to the site and assembled to greatly improve construction efficiency. In this case, many of the latter precast methods have been adopted, and recently, many of them have been adopted for high-rise apartments with more than 30 floors.

プレキャスト工法を採用する場合、中実断面としてプレキャスト部材を製作するいわゆるフルプレキャスト工法と、梁であればコの字状に製作しておき現場でその内側に鉄筋を配筋してコンクリートを充填するハーフプレキャスト工法とがあり、実際にはこれらの長所短所を考慮しながら、使い分けされているのが現状であるが、いずれにしろ、現場で組み上げる以上、プレキャスト部材同士の接合は避けられない。   When the precast method is adopted, the so-called full precast method for producing a precast member as a solid cross section and the beam is produced in a U-shape if it is a beam, and a reinforcing bar is placed on the inside to fill the concrete. There is a half-precast method, and in reality, these are used properly in consideration of these advantages and disadvantages, but in any case, as long as they are assembled on site, joining of precast members is inevitable.

ここで、主要構造部材同士の接合部には、特に地震時において大きな曲げモーメントが発生するため、かかる接合部をいかに施工するかが、プレキャスト工法において耐震性を確保するための最大の課題といっても過言ではなく、従来から数多くの提案がなされている。   Here, since a large bending moment is generated at the joint between the main structural members, especially during an earthquake, how to construct such a joint is the biggest issue for securing earthquake resistance in the precast method. However, it is not an exaggeration, and many proposals have been made.

例えば、特許文献1には、「対面する各PC床板の辺部Bの端面間に打設用空間Sp1 が形成されるように、対のPC床板の端縁よりの部分を鉄骨梁4上に載置し、各PC床板中に間隔をおいて埋め込まれた多数の接合鉄筋12aの接合用部分12a1 を辺部Bの波型の端面から前記空間Sp1 中に突出させ、一方のPC床板10の接合用部分12a1と他方のPC床板の接合用部分12a1 とが接近して略平行になるようにし、略平行された接合用部分12a1を互いに接合し、鉄骨梁の上面に頭部のあるスタッドSd1 を間隔をおいて多数植設しておき、打設空間内にコンクリートを打設して鉄骨梁と各PC床板とを接合する」PC床板の固着方法が開示されている。   For example, Patent Document 1 states that “a portion from the edge of the pair of PC floor plates is placed on the steel beam 4 so that a placement space Sp1 is formed between the end surfaces of the side portions B of the PC floor plates facing each other. The joint portions 12a1 of a large number of joint reinforcing bars 12a that are placed and embedded at intervals in each PC floor board are projected from the corrugated end face of the side B into the space Sp1, and one PC floor board 10 The joining portion 12a1 and the joining portion 12a1 of the other PC floor board are brought close to and substantially parallel to each other, the substantially parallel joining portions 12a1 are joined to each other, and the stud Sd1 having a head on the upper surface of the steel beam. A PC floor board fixing method is disclosed, in which a large number of pipes are planted at intervals, and concrete is placed in a placement space to join a steel beam and each PC floor board.

また、特許文献2には、「対のフルPC床板10をそれらの辺部間に打設用空間Sp1 ができるように梁2上に載置し、空間Sp1 内において、一方の床板10の鉄筋の接続用部分12b1 と他方の床板10の鉄筋の接続用部分12b1とが接近して平行になるようにし、平行にされた2本の鉄筋の接続用部分に一個の鋼製スリーブSvを嵌め、鋼製スリーブの中央の孔にウェッジWgを圧入して2本の鉄筋を接続し、空間Sp1 内の梁2に頭付きスタッドSdを固着し、空間Sp1 内にコンクリートを打設して、フルPC床板を梁に固着しかつフルPC床板同士を固着する」フルPC床板の固着方法が開示されている。   Patent Document 2 states that “a pair of full PC floor plates 10 are placed on the beam 2 so that a placement space Sp1 is formed between the sides, and the reinforcing bars of one floor plate 10 are placed in the space Sp1. The connecting portion 12b1 of the other floor plate and the connecting portion 12b1 of the reinforcing bar of the other floor board 10 are close to each other and parallel to each other, and one steel sleeve Sv is fitted to the connecting portion of the two reinforcing bars, The wedge Wg is press-fitted into the center hole of the steel sleeve to connect the two rebars, the headed stud Sd is fixed to the beam 2 in the space Sp1, and concrete is placed in the space Sp1, A method of adhering full PC floorboards is disclosed in which floorboards are secured to beams and full PC floorboards are secured together.

また、特許文献3には、「PCa床板4と複合構造梁1における鉄骨造部分との接合状態は、図5及び図6に示す通りである。ここで図5の平面図は、図1において例えばBで示される箇所であり、この実施例では、PCa床板4内に埋め込まれた鉄筋11がスタット8間において相互に重なり合うようにしてPCa床板4を複合構造梁1の鉄骨造部分上に載置し、ワイヤメッシュ12を被せた状態で仮想線に示す位置までコンクリートを打設してなる構造としているが、この部分においても上記の如く、十字形部材7や垂直状のU型アンカー筋9を用いた接合を行っても良い」(段落番号24〜25)と記載されている。   Further, Patent Document 3 states that “the joined state of the PCa floor plate 4 and the steel structure portion of the composite structural beam 1 is as shown in FIGS. 5 and 6. Here, the plan view of FIG. For example, in this embodiment, the PCa floor plate 4 is mounted on the steel frame portion of the composite structural beam 1 so that the reinforcing bars 11 embedded in the PCa floor plate 4 overlap each other between the stats 8. The concrete is placed to the position indicated by the imaginary line with the wire mesh 12 covered, but also in this portion, as described above, the cross-shaped member 7 and the vertical U-shaped anchor bar 9 May be performed "(paragraph numbers 24 to 25).

また、特許文献4には、「プレキャスト床板端部の凸部11a及び凹部11bから構成され且つ隣接するプレキャスト床板端部のそれらと噛み合うように鉄骨梁15上に並べて設置されたコッター部11に少なくとも一つの穴12が形成され、この穴12にスタッドボルト16が配置されて鉄骨梁に溶接され、隣接するプレキャスト床板10との間隙部17及び穴12内に無収縮モルタルが打設されている。プレキャスト床板内部には穴の周囲に配置されたスパイラル筋13と穴12の周囲をめぐるように配置されたU型鉄筋部14aを有するスラブ筋14とが少なくとも配筋され、このU型鉄筋部14aに補強筋13が配筋されている」と記載されている。   Further, Patent Document 4 states that “at least a cotter portion 11 that is composed of a convex portion 11 a and a concave portion 11 b at the end portion of the precast floor plate and is arranged side by side on the steel beam 15 so as to mesh with those at the end portion of the adjacent precast floor plate. One hole 12 is formed, a stud bolt 16 is disposed in the hole 12 and welded to the steel beam, and a non-shrink mortar is placed in the gap 17 and the hole 12 with the adjacent precast floor board 10. Inside the precast floor board, at least a spiral bar 13 arranged around the hole and a slab bar 14 having a U-shaped reinforcing bar part 14a arranged around the hole 12 are arranged, and this U-type reinforcing bar part 14a. The reinforcing bar 13 is arranged.

また、特許文献5には、「2枚のプレキャストコンクリート造の床板3A、3Bの端部を鉄骨梁1上に載せて互いに端面4A、4Bを対向させると共に、端面4A、4B間の空間7に各床板3A、3Bの端面4A、4Bから鉄筋を張り出させて、空間7にコンクリート8を打設することにより床板3A、3Bを接合する。その際、鉄骨梁1の上面にスタッドピン10を列設し、鉄筋として、水平面内でU字状に湾曲し先端湾曲部15aを前記空間7内に張り出した水平なU形鉄筋15を設け、向かい合う床板3A、3Bからそれぞれ張り出した水平なU形鉄筋15の先端湾曲部15aを、互いに一つおきのスタッドピン10に嵌装した上で、空間7にコンクリート8を打設する」と記載されている。   Patent Document 5 states that “ends of two precast concrete floor boards 3A and 3B are placed on the steel beam 1 so that the end faces 4A and 4B face each other, and the space 7 between the end faces 4A and 4B is placed in the space 7”. Reinforcing the reinforcing bars from the end surfaces 4A, 4B of the floor plates 3A, 3B, and joining the floor plates 3A, 3B by placing concrete 8 in the space 7. At this time, the stud pin 10 is attached to the upper surface of the steel beam 1. A horizontal U-shaped reinforcing bar 15 is provided as a reinforcing bar, which is curved in a U-shape in a horizontal plane and has a curved end 15a projecting into the space 7, and projecting from the floor plates 3A and 3B facing each other. It is described that the bending portion 15a of the reinforcing bar 15 is fitted to every other stud pin 10 and then the concrete 8 is placed in the space 7.

また、特許文献6には、「梁の上面にプレキャストコンクリート床板2、3の接合端部が対向配置され、これらの接合端部から適宜間隔をもって水平状に突設されたループ状の接続筋4が対向する接続筋5間に挿入されて重ね配筋され、これらの接続筋4、5内に梁上面から突出した棒状筋6が挿入されるとともに、接続筋4、5の上面には補強筋7が直交配筋され、この接合端部間8に現場打ちコンクリート9が打設された」と記載されている。   Further, Patent Document 6 states that “the connecting end 4 of the precast concrete floor plates 2, 3 is arranged opposite to the upper surface of the beam, and is protruded horizontally from the connecting end at an appropriate interval. Is inserted between the connecting bars 5 facing each other, and a bar-like bar 6 protruding from the beam upper surface is inserted into the connecting bars 4 and 5, and reinforcing bars are provided on the upper surfaces of the connecting bars 4 and 5. 7 is perpendicularly arranged, and the cast-in-place concrete 9 is placed between the joint ends 8 ”.

特開2000−17764号公報Japanese Patent Application Laid-Open No. 2000-17774 特開2002−161603号公報JP 2002-161603 A 特開平7−207795号公報JP-A-7-207795 特開平9−32171号公報JP-A-9-32171 特開平9−158377公報JP-A-9-158377 特開平9−165860号公報JP-A-9-165860

しかしながら、これらは、対向する二枚の床版の間隙にコンクリートを充填することによって、該各床版からそれぞれ露出している二組の鉄筋と鉄骨梁の天端に突設されたスタッドボルトとをコンクリートを介して接合しようとするものであって、本質的には接合部における強度をスタッドに対するコンクリートの支圧力、あるいはコンクリートと鉄筋との付着力に期待する構造ゆえ、どうしてもスタッドボルトや鉄筋が複雑に交錯し、作業性が低下するという問題や、現場打ちコンクリートを介した接合になるため、接合強度に関する品質の確保には多くの労力を必要とするという問題を生じていた。   However, by filling concrete between the two floor slabs facing each other, two sets of reinforcing bars exposed from each floor slab and stud bolts protruding from the top end of the steel beam, Because it is a structure that expects the strength of the joint to be the support pressure of the concrete against the stud or the adhesion between the concrete and the reinforcing bars, the stud bolts and reinforcing bars The problem is that the workability is deteriorated due to complex crossing and that the work is performed via cast-in-place concrete, so that a lot of labor is required to ensure the quality related to the joint strength.

ちなみに、特許文献4記載の発明は他の特許文献記載の発明とは異なり、PC床版に予め形成された穴の中心にスタッドボルトが位置するように該PC床版を配置し、しかる後、穴に無収縮モルタルを充填する工法を採用しているものの、PC床版と鉄骨梁との間にモルタルが介在することには違いはなく、接合強度面での品質管理の難しさは何ら改善されていない。   Incidentally, unlike the invention described in other patent documents, the invention described in Patent Document 4 is arranged such that the stud bolt is positioned at the center of the hole formed in the PC floor slab in advance, Although a method of filling the hole with non-shrink mortar is adopted, there is no difference in the mortar being interposed between the PC floor slab and the steel beam, and the difficulty of quality control in terms of joint strength is improved. It has not been.

加えて、品質管理の難しさは、安定した接合強度を確保するという性能面にも少なからず影響を及ぼすこととなる。   In addition, the difficulty of quality control has a considerable influence on the performance aspect of ensuring stable joint strength.

本発明は、上述した事情を考慮してなされたもので、プレキャスト床版の縁部を鉄骨梁の天端に載せて該プレキャスト床版を接合する際、施工時の作業性を改善しつつ、プレキャスト床版と鉄骨梁とを品質管理が容易な状態で強固に接合することが可能なプレキャスト床版と梁との接合構造を提供することを目的とする。   The present invention was made in consideration of the above-mentioned circumstances, and when the precast floor slab is joined on the top end of the steel beam by joining the edge of the precast floor slab, while improving workability during construction, An object of the present invention is to provide a joint structure between a precast floor slab and a beam capable of firmly joining the precast floor slab and the steel beam in a state where quality control is easy.

上記目的を達成するため、本発明に係るプレキャスト床版と梁との接合構造は請求項1に記載したように、プレキャスト床版に埋設されその縁部端面から延びる鉄筋の露出端部と、前記プレキャスト床版の縁部が載せられる鉄骨梁の天端に立設されたスタッド部材と、前記鉄筋の露出端部及び前記スタッド部材を連結する連結手段とからなり、該連結手段を、前記鉄筋の露出端部及び前記スタッド部材が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記鉄筋の露出端部及び前記スタッド部材との間に圧入される楔部材とで構成したものである。   In order to achieve the above object, the joint structure of the precast floor slab and the beam according to the present invention as described in claim 1, the exposed end portion of the reinforcing bar embedded in the precast floor slab and extending from the edge end surface thereof, A stud member erected on the top end of the steel beam on which the edge of the precast floor slab is placed, and a connecting means for connecting the exposed end portion of the reinforcing bar and the stud member. A cylindrical body having an oval cross-sectional shape that is inserted in a state in which the exposed end portion and the stud member overlap each other by a predetermined length, and a pair of opposing flat plate-like wall parts among the wall parts constituting the cylindrical body, respectively. A wedge member that is inserted into the formed wedge insertion hole and press-fitted between the exposed end portion of the reinforcing bar and the stud member.

また、本発明に係るプレキャスト床版と梁との接合構造は、前記スタッド部材を、互いに直交する2つの真直部が形成されたほぼL字状のスタッド部材として形成するとともに、該真直部のうち、一方の真直部を前記鉄骨梁に立設できるように、かつ他方の真直部を前記鉄筋の露出端部とともに前記筒体に挿通できるように構成したものである。   Further, in the joining structure of the precast floor slab and the beam according to the present invention, the stud member is formed as a substantially L-shaped stud member in which two straight portions orthogonal to each other are formed. One straight part can be erected on the steel beam, and the other straight part can be inserted into the cylindrical body together with the exposed end of the reinforcing bar.

また、本発明に係るプレキャスト床版と梁との接合構造は請求項3に記載したように、プレキャスト床版に埋設されその縁部端面から延びる鉄筋の露出端部と、前記プレキャスト床版の縁部が載せられる鉄骨梁の天端に立設されたスタッド部材と、互いに直交する2つの真直部が形成されたほぼL字状の添え部材と、該添え部材を構成する2つの真直部のうち、一方の真直部及び前記鉄筋の露出端部を連結する第1の連結手段と、他方の真直部及び前記スタッド部材を連結する第2の連結手段とからなり、前記第1の連結手段を、前記一方の真直部及び前記鉄筋の露出端部が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記一方の真直部及び前記鉄筋の露出端部との間に圧入される楔部材とで構成するとともに、前記第2の連結手段を、前記他方の真直部及び前記スタッド部材が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記他方の真直部及び前記スタッド部材との間に圧入される楔部材とで構成したものである。   The precast floor slab / beam connection structure according to the present invention includes, as described in claim 3, an exposed end portion of a reinforcing bar embedded in the precast floor slab and extending from an end face of the precast floor slab, and an edge of the precast floor slab. A stud member erected on the top end of the steel beam on which the part is placed, a substantially L-shaped attachment member formed with two straight portions orthogonal to each other, and two straight portions constituting the attachment member The first connecting means for connecting one straight part and the exposed end of the reinforcing bar, and the second connecting means for connecting the other straight part and the stud member, the first connecting means, A cylindrical body having an oval cross-sectional shape that is inserted in a state where the one straight portion and the exposed end of the reinforcing bar overlap each other by a predetermined length, and a pair of opposing flat plates among the wall portions constituting the cylindrical body Inserted into the wedge insertion holes formed in the respective wall portions. A wedge member press-fitted between one straight portion and the exposed end portion of the reinforcing bar, and the second connecting means overlaps the other straight portion and the stud member by a predetermined length. A cylindrical body having an oval cross-sectional shape to be inserted in a state, and the other straight line that is inserted into a wedge insertion hole formed in each of a pair of opposed flat plate wall portions among the wall portions constituting the cylindrical body And a wedge member press-fitted between the stud member and the stud member.

また、本発明に係るプレキャスト床版と梁との接合構造は、前記プレキャスト床版を、縁部端面が互いに対向するように前記鉄骨梁の天端に載せられた一対のプレキャスト床版で構成するとともに、該一対のプレキャスト床版のうち、一方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材と、他方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材とを、前記鉄骨梁の材軸に沿って交互に立設したものである。   Moreover, the joint structure of the precast floor slab and the beam according to the present invention is configured by a pair of precast floor slabs placed on the top end of the steel beam so that the edge end surfaces face each other. In addition, of the pair of precast floor slabs, the stud member connected to the exposed end of the reinforcing bar embedded in one precast floor slab, and the exposed end of the reinforcing bar embedded in the other precast floor slab. The stud members are erected alternately along the material axis of the steel beam.

第1の発明に係るプレキャスト床版と梁との接合構造においては、筒体及び楔部材で連結手段を構成するとともに、プレキャスト床版の縁部端面から延びる鉄筋の露出端部を、上述した連結手段を介して鉄骨梁の天端に立設されたスタッド部材に連結する。   In the joining structure of the precast floor slab and the beam according to the first invention, the connecting means is constituted by the cylindrical body and the wedge member, and the exposed end portion of the reinforcing bar extending from the edge end surface of the precast floor slab is connected as described above. It connects with the stud member erected at the top end of the steel beam through the means.

また、第2の発明に係るプレキャスト床版と梁との接合構造においては、筒体及び楔部材で第1の連結手段及び第2の連結手段を構成するとともに、プレキャスト床版の縁部端面から延びる鉄筋の露出端部を、上述した第1の連結手段、第2の連結手段及び添え部材を介して鉄骨梁の天端に立設されたスタッド部材に連結する。   Moreover, in the joining structure of the precast floor slab and the beam according to the second invention, the cylindrical body and the wedge member constitute the first connection means and the second connection means, and from the edge end surface of the precast floor slab. The exposed end portion of the extending reinforcing bar is connected to the stud member erected on the top end of the steel beam via the first connecting means, the second connecting means and the accessory member described above.

このようにすると、プレキャスト床版に埋設された鉄筋の露出端部は、鉄骨梁に立設されたスタッド部材に強固に連結されることとなり、かくしてプレキャスト床版及び鉄骨梁は、コンクリートやモルタルの付着強度に依存していた従来の接合構造に比べて、より安定した接合強度を確保することが可能となるとともに、鉄筋同士の重ね継手が不要になるため、配筋やコンクリート打ちを行う際の作業性が格段に向上する。   In this way, the exposed end of the reinforcing bar embedded in the precast floor slab is firmly connected to the stud member erected on the steel beam. Thus, the precast floor slab and the steel beam are made of concrete or mortar. Compared to conventional joint structures that depend on bond strength, it is possible to ensure a more stable joint strength and eliminate the need for lap joints between reinforcing bars, so when placing reinforcements and placing concrete Workability is greatly improved.

第1の発明におけるスタッド部材は、上述した連結手段を介してプレキャスト床版から延びる鉄筋の露出端部に連結できる限り、その形状や仕様は任意であり、特に、プレキャスト床版から延びる鉄筋の露出端部の折曲げ形状に合わせてスタッド部材を構成すればよい。   As long as the stud member in the first invention can be connected to the exposed end portion of the reinforcing bar extending from the precast floor slab through the connecting means described above, the shape and specification thereof are arbitrary, and in particular, the exposure of the reinforcing bar extending from the precast floor slab. What is necessary is just to comprise a stud member according to the bending shape of an edge part.

例えば、鉄筋の露出端部がプレキャスト床版から水平に延びている場合には、スタッド部材を、互いに直交する2つの真直部が形成されたほぼL字状のスタッド部材として形成し、該真直部のうち、一方の真直部を前記鉄骨梁に立設できるように、かつ他方の真直部を前記鉄筋の露出端部とともに前記筒体に挿通できるように構成すればよい。これとは逆に、プレキャスト床版を水平に載置したときに鉄筋の露出端部が下方を向くように該露出端部をL字状に折曲げ加工してある場合には、スタッド部材を直棒状に形成すれば足りる。   For example, when the exposed end of the reinforcing bar extends horizontally from the precast floor slab, the stud member is formed as a substantially L-shaped stud member formed with two straight portions orthogonal to each other, and the straight portion Of these, one straight portion can be erected on the steel beam, and the other straight portion can be inserted into the cylinder together with the exposed end of the reinforcing bar. On the contrary, when the exposed end of the rebar is bent in an L shape so that the exposed end of the reinforcing bar faces downward when the precast slab is placed horizontally, the stud member is It is sufficient if it is formed in a straight bar shape.

一方、プレキャスト床版を水平に載置したときに鉄筋の露出端部が斜め下方、例えば45゜方向を向くように折曲げ加工してある場合には、スタッド部材を、135゜をなす2つの真直部が形成されたほぼ折曲げ状のスタッド部材として形成するとともに、該真直部のうち、一方の真直部を前記鉄骨梁に立設できるように、かつ他方の真直部を前記鉄筋の露出端部とともに前記筒体に挿通できるように構成すればよい。   On the other hand, when the precast floor slab is placed horizontally and the exposed end portion of the reinforcing bar is bent so as to face obliquely downward, for example, 45 °, the stud member is moved to two of 135 °. The straight member is formed as a substantially bent stud member, and one straight portion of the straight members can be erected on the steel beam, and the other straight member is the exposed end of the reinforcing bar. What is necessary is just to comprise so that it can penetrate the said cylindrical body with a part.

上述した各発明におけるプレキャスト床版は、例えば構造物の外壁に沿って架設された鉄骨梁に接合する場合、単体で該鉄骨梁に接合されることとなるが、構造物中央などの一般箇所では、一対のプレキャスト床版をそれらの縁部端面が互いに対向するように鉄骨梁の天端に載せて組み立てることが多い。   For example, when the precast slab in each invention described above is joined to a steel beam erected along the outer wall of the structure, it is joined to the steel beam as a single unit. In many cases, a pair of precast slabs are assembled on the top end of a steel beam so that their edge portions face each other.

かかる場合においても、上述した各発明を適用できることは言うまでもなく、その場合の構成としては例えば、該一対のプレキャスト床版のうち、一方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材と、他方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材とを、鉄骨梁の材軸に沿って交互に立設する構成が考えられる。また、かかる場合におけるスタッド部材の平面配置を、例えば千鳥配置とすることができる。   Even in such a case, it goes without saying that each of the above-described inventions can be applied, and as a configuration in that case, for example, one of the pair of precast slabs is connected to an exposed end of a reinforcing bar embedded in one precast slab. It is conceivable that the stud member and the stud member connected to the exposed end of the reinforcing bar embedded in the other precast slab are alternately erected along the material axis of the steel beam. Further, the planar arrangement of the stud members in such a case can be, for example, a staggered arrangement.

以下、本発明に係るプレキャスト床版と梁との接合構造の実施の形態について、添付図面を参照して説明する。なお、従来技術と実質的に同一の部品等については同一の符号を付してその説明を省略する。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a joint structure between a precast floor slab and a beam according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(第1実施形態) (First embodiment)

図1は、本実施形態に係るプレキャスト床版と梁との接合構造を示した斜視図、図2は同じく平面図及び側面図である。これらの図でわかるように、本実施形態に係るプレキャスト床版と梁との接合構造1は、プレキャスト床版3a,3bの縁部端面2a,2bが対向するように該プレキャスト床版の縁部4a,4bを鉄骨梁5の天端8に載置するとともに該天端にスタッド部材9a,9bを立設し、プレキャスト床版3aに埋設されその縁部端面2aから延びる鉄筋6aの露出端部7aを連結手段である接合具10を介してスタッド部材9aに連結するとともに、プレキャスト床版3bに埋設されその縁部端面2bから延びる鉄筋6bの露出端部7bを接合具10を介してスタッド部材9bに連結してある。   FIG. 1 is a perspective view showing a joint structure between a precast floor slab and a beam according to the present embodiment, and FIG. 2 is a plan view and a side view of the same. As can be seen from these drawings, the joint structure 1 between the precast floor slab and the beam according to the present embodiment is such that the edge portions 2a and 2b of the precast floor slabs 3a and 3b face each other. 4a and 4b are placed on the top end 8 of the steel beam 5 and stud members 9a and 9b are erected on the top end, and the exposed end portion of the reinforcing bar 6a is embedded in the precast floor slab 3a and extends from the edge end surface 2a. 7a is connected to the stud member 9a via the connecting tool 10 which is a connecting means, and the exposed end portion 7b of the reinforcing bar 6b embedded in the precast floor slab 3b and extending from the edge end surface 2b is connected to the stud member 10 via the connecting tool 10. 9b.

接合具10は図3に示すように、断面形状が長円状の筒体31と、該筒体を構成する壁部のうち、対向する一対の平板状壁部32,32にそれぞれ形成された楔挿通孔33,33に挿通される楔部材34とで構成してある。   As shown in FIG. 3, the connector 10 is formed in a cylindrical body 31 having an oval cross-sectional shape and a pair of opposing flat wall portions 32 and 32 among the wall portions constituting the cylindrical body. A wedge member 34 is inserted into the wedge insertion holes 33 and 33.

ここで、筒体31は、鉄筋6aの露出端部7a及びスタッド部材9aが所定長だけ重なった状態で挿通されるように構成してあるとともに、鉄筋6bの露出端部7b及びスタッド部材9bが所定長だけ重なった状態で挿通されるように構成してある。また、楔部材34は、鉄筋6aの露出端部7a及びスタッド部材9aとの間に圧入されるように構成してあるとともに、鉄筋6bの露出端部7b及びスタッド部材9bとの間に圧入されるように構成してある。   Here, the cylindrical body 31 is configured to be inserted in a state where the exposed end portion 7a of the reinforcing bar 6a and the stud member 9a overlap each other by a predetermined length, and the exposed end portion 7b and the stud member 9b of the reinforcing bar 6b It is configured to be inserted in a state where it overlaps by a predetermined length. The wedge member 34 is configured to be press-fitted between the exposed end 7a of the reinforcing bar 6a and the stud member 9a, and is press-fitted between the exposed end 7b of the reinforcing bar 6b and the stud member 9b. It is comprised so that.

スタッド部材9aは図4(a),(b)に示すように、互いに直交する2つの真直部41a,42aが形成された概ねL字状をなすスタッド部材として形成してあるとともに、真直部41aを鉄骨梁5の天端8に溶接で固定し、真直部42aを鉄筋6aの露出端部7aとともに筒体31に挿通できるように構成してある。   As shown in FIGS. 4A and 4B, the stud member 9a is formed as a substantially L-shaped stud member in which two straight portions 41a and 42a orthogonal to each other are formed, and the straight portion 41a. Is fixed to the top end 8 of the steel beam 5 by welding, and the straight portion 42a can be inserted into the cylindrical body 31 together with the exposed end portion 7a of the reinforcing bar 6a.

同様に、スタッド部材9bは図4(c),(d)に示すように、互いに直交する2つの真直部41b,42bが形成された概ねL字状をなすスタッド部材として形成してあるとともに、真直部41bを鉄骨梁5の天端8に溶接で固定し、真直部42bを鉄筋6bの露出端部7bとともに筒体31に挿通できるように構成してある。   Similarly, as shown in FIGS. 4 (c) and 4 (d), the stud member 9b is formed as a substantially L-shaped stud member in which two straight portions 41b and 42b orthogonal to each other are formed. The straight part 41b is fixed to the top end 8 of the steel beam 5 by welding, and the straight part 42b is configured to be inserted into the cylindrical body 31 together with the exposed end part 7b of the reinforcing bar 6b.

これらのスタッド部材9a,9bは、鉄筋7a,7bと同径の異形鉄筋で構成してあるとともに、図2(a)でよくわかるように鉄骨梁5の材軸方向に沿って千鳥配置してある。すなわち、スタッド部材9a,9bは、プレキャスト床版3aに埋設された鉄筋6aの露出端部7aに連結されるスタッド部材9aと、プレキャスト床版3bに埋設された鉄筋6bの露出端部7bに連結されるスタッド部材9bとを、鉄骨梁5の材軸に沿って交互に立設してある。   These stud members 9a and 9b are formed of deformed reinforcing bars having the same diameter as the reinforcing bars 7a and 7b, and are staggered along the material axis direction of the steel beam 5 as can be seen in FIG. 2 (a). is there. That is, the stud members 9a and 9b are connected to the stud member 9a connected to the exposed end portion 7a of the reinforcing bar 6a embedded in the precast floor slab 3a and to the exposed end portion 7b of the reinforcing bar 6b embedded in the precast floor slab 3b. The stud members 9b are erected alternately along the material axis of the steel beam 5.

なお、スタッド部材9a,9bは、現場溶接で鉄骨梁5に固定するようにしてもよいし、予め工場で溶接しておき、鉄骨梁5に固定された状態で現場に搬入するようにしてもかまわない。   The stud members 9a and 9b may be fixed to the steel beam 5 by on-site welding, or may be welded in advance in a factory and carried to the site while being fixed to the steel beam 5. It doesn't matter.

本実施形態に係るプレキャスト床版と梁との接合構造1を施工するには、プレキャスト床版3aを鉄骨梁5の天端8に載置するとともに、該天端に溶接固定されたスタッド部材9aの真直部42aを、プレキャスト床版3aから延びる鉄筋6aの露出端部7aとともに筒体31に挿通する。   In order to construct the joint structure 1 between the precast floor slab and the beam according to the present embodiment, the precast floor slab 3a is placed on the top end 8 of the steel beam 5, and the stud member 9a fixed to the top end by welding. The straight portion 42a is inserted into the cylindrical body 31 together with the exposed end portion 7a of the reinforcing bar 6a extending from the precast floor slab 3a.

なお、接合具10を取り付ける手順については、現場の状況に応じて適宜選択決定すればよく、例えば、スタッド部材9aを鉄骨梁5に先付けすると後工程での接合具10の取付け作業に困難が予想される場合には、工場溶接ではなく現場溶接とするのがよい。この場合には、スタッド部材9aの真直部42aと鉄筋6aの露出端部7aとを予め筒体31に挿通しておき、プレキャスト床版3aの載置及び位置決めを行った後、スタッド部材9aの真直部41aを鉄骨梁5の天端8に溶接すればよい。   The procedure for attaching the connector 10 may be appropriately selected and determined according to the situation at the site. For example, if the stud member 9a is preceded by the steel beam 5, it will be difficult to attach the connector 10 in a later step. If so, it is better to use field welding rather than factory welding. In this case, the straight portion 42a of the stud member 9a and the exposed end portion 7a of the reinforcing bar 6a are inserted into the cylindrical body 31 in advance, and after placing and positioning the precast floor slab 3a, the stud member 9a The straight portion 41 a may be welded to the top end 8 of the steel beam 5.

プレキャスト床版3bについても同様であり、これを鉄骨梁5の天端8に載置するとともに、該天端に溶接固定されたスタッド部材9bの真直部42bを、プレキャスト床版3bから延びる鉄筋6bの露出端部7bとともに筒体31に挿通する。スタッド部材9bを鉄骨梁5に先付けすると後工程での接合具10の取付け作業に困難が予想される場合には、上述したと同様に現場溶接とすればよい。   The same applies to the precast floor slab 3b, and this is placed on the top end 8 of the steel beam 5, and the straight portion 42b of the stud member 9b welded and fixed to the top end is rebar 6b extending from the precast floor slab 3b. The exposed end portion 7b is inserted into the cylindrical body 31. When the stud member 9b is preceded by the steel beam 5, if it is expected that the attaching operation of the connector 10 in the subsequent process is difficult, the welding may be performed in the same manner as described above.

プレキャスト床版3a,3bの設置及び筒体31への挿通作業が終了したならば、楔部材34を楔挿通孔33,33に打ち込んで、スタッド部材9aの真直部42aとプレキャスト床版3aから延びる鉄筋6aの露出端部7aとを連結するとともに、スタッド部材9bの真直部42bとプレキャスト床版3bから延びる鉄筋6bの露出端部7bとを連結する。楔部材34を楔挿通孔33,33に通して圧入するにあたっては、従来公知の楔打込み機を適宜選択して用いればよい。   When the installation of the precast floor slabs 3a and 3b and the insertion operation into the cylindrical body 31 are completed, the wedge member 34 is driven into the wedge insertion holes 33 and 33 and extends from the straight portion 42a of the stud member 9a and the precast floor slab 3a. While connecting the exposed end part 7a of the reinforcing bar 6a, the straight part 42b of the stud member 9b and the exposed end part 7b of the reinforcing bar 6b extending from the precast floor slab 3b are connected. In press-fitting the wedge member 34 through the wedge insertion holes 33, 33, a conventionally known wedge driving machine may be appropriately selected and used.

次に、プレキャスト床版3a,3bの縁部端面2a,2bに挟まれた空間に必要に応じて補強筋を配筋した後、コンクリートを充填して接合作業を完了する。   Next, after reinforcing bars are placed in the space between the edge end faces 2a and 2b of the precast floor slabs 3a and 3b as needed, the concrete is filled and the joining operation is completed.

以上説明したように、本実施形態に係るプレキャスト床版と梁との接合構造1によれば、筒体31及び楔部材34で接合具10を構成し、プレキャスト床版3a,3bの縁部端面2a,2bから延びる鉄筋6a,6bの露出端部7a,7bを接合具10を介して鉄骨梁5の天端に立設されたスタッド部材9a,9bに連結するようにしたので、プレキャスト床版3a,3bに埋設された鉄筋6a,6bの露出端部7a,7bを、鉄骨梁5に立設されたスタッド部材9a,9bに強固に連結することが可能となる。   As explained above, according to the joint structure 1 of the precast floor slab and the beam according to the present embodiment, the joining tool 10 is constituted by the cylindrical body 31 and the wedge member 34, and the edge end faces of the precast floor slabs 3 a and 3 b Since the exposed end portions 7a and 7b of the reinforcing bars 6a and 6b extending from 2a and 2b are connected to the stud members 9a and 9b erected on the top end of the steel beam 5 via the connector 10, the precast floor slab The exposed end portions 7a and 7b of the reinforcing bars 6a and 6b embedded in 3a and 3b can be firmly connected to the stud members 9a and 9b erected on the steel beam 5.

そのため、プレキャスト床版3a、プレキャスト床版3b及び鉄骨梁5は、接合具10及びスタッド部材9a,9bを介して一体化されることとなり、かくしてコンクリートやモルタルの付着強度に依存していた従来の接合構造に比べて、より安定した接合強度を確保することが可能となるとともに、鉄筋同士の重ね継手が不要になるため、配筋やコンクリート打設を行う際の作業性が格段に向上する。   Therefore, the precast floor slab 3a, the precast floor slab 3b, and the steel beam 5 are integrated through the joint 10 and the stud members 9a and 9b, and thus depend on the adhesion strength of concrete or mortar. Compared to the joint structure, more stable joint strength can be secured, and a lap joint between the reinforcing bars is not required, so that workability when placing bars and placing concrete is remarkably improved.

本実施形態では、一対のプレキャスト床版3a,3bをそれらの縁部端面が対向するように鉄骨梁5の上に載置する場合について説明したが、構造物の外壁に沿った鉄骨梁にプレキャスト床版を載置する場合についても、本発明を適用できることは言うまでもない。   In the present embodiment, the case where the pair of precast floor slabs 3a and 3b is placed on the steel beam 5 so that the edge surfaces of the precast floor slabs face each other has been described. It goes without saying that the present invention can also be applied to the case of placing a floor slab.

かかる変形例においては、上述した実施形態において、プレキャスト床版3b、スタッド部材9b及びそれらに関連した部材が省略されるだけでその他の構成は同様であるので、ここではその説明を省略する。   In this modified example, in the above-described embodiment, only the precast floor slab 3b, the stud member 9b, and the members related thereto are omitted, and the other configurations are the same. Therefore, the description thereof is omitted here.

また、本実施形態では、スタッド部材を、互いに直交する2つの真直部41a,42aが形成された概ねL字状をなすスタッド部材9a,9bとして構成したが、本発明に係るスタッド部材は、このような形態に限定されるものではない。   Further, in the present embodiment, the stud member is configured as the substantially L-shaped stud members 9a and 9b in which the two straight portions 41a and 42a orthogonal to each other are formed. It is not limited to such a form.

図5は、変形例に係るスタッド部材を示したものであって、同図(a)に係るスタッド部材43は、プレキャスト床版3aから延びる鉄筋6aの露出端部7aが斜め下方を向くように折曲げ加工してある場合の変形例である。かかる場合のスタッド部材43は、90゜よりも大きな鈍角をなす2つの真直部が形成された折曲げ状のスタッド部材として形成するとともに、該真直部のうち、一方の真直部を鉄骨梁5に立設し、他方の真直部を鉄筋6aの露出端部7aとともに接合具10の筒体31に挿通するようにすればよい。また、同図(b)に係るスタッド部材44は、プレキャスト床版3aから延びる鉄筋6aの露出端部7aが下方を向くようにほぼ直角に折曲げ加工してある場合の変形例である。かかる場合のスタッド部材44は直棒状に形成して鉄骨梁5の天端に溶接固定し、鉄筋6aの露出端部7aとともに接合具10の筒体31に挿通するようにすればよい。   FIG. 5 shows a stud member according to a modification, and the stud member 43 according to FIG. 5 (a) is such that the exposed end portion 7a of the reinforcing bar 6a extending from the precast floor slab 3a faces obliquely downward. It is a modification in the case of bending. The stud member 43 in this case is formed as a bent stud member in which two straight portions having an obtuse angle larger than 90 ° are formed, and one straight portion of the straight portions is formed on the steel beam 5. The other straight portion may be inserted into the cylindrical body 31 of the connector 10 together with the exposed end portion 7a of the reinforcing bar 6a. Moreover, the stud member 44 according to FIG. 6B is a modification in the case where the exposed end portion 7a of the reinforcing bar 6a extending from the precast floor slab 3a is bent at a substantially right angle so as to face downward. In such a case, the stud member 44 may be formed in a straight bar shape, welded and fixed to the top end of the steel beam 5, and inserted into the cylindrical body 31 of the connector 10 together with the exposed end portion 7a of the reinforcing bar 6a.

また、本実施形態では、本発明のスタッド部材を異形鉄筋で構成したスタッド部材9a,9bとしたが、これに代えて、円形断面からなる棒鋼で本発明のスタッド部材を構成してもよい。   Moreover, in this embodiment, although the stud member 9a, 9b which comprised the stud member of this invention with the deformed reinforcing bar was used, it may replace with this and the stud member of this invention may be comprised with the bar steel which consists of a circular cross section.

また、本実施形態又は上記変形例では、スタッド部材9a,9bやスタッド部材43,44を溶接によって鉄骨梁5の天端8に固定するようにしたが、鉄骨梁5に強固に固定できるのであれば、溶接以外の公知の固定方法を適宜採用することができる。   Further, in the present embodiment or the above-described modification, the stud members 9a and 9b and the stud members 43 and 44 are fixed to the top end 8 of the steel beam 5 by welding, but may be firmly fixed to the steel beam 5. For example, a known fixing method other than welding can be appropriately employed.

(第2実施形態) (Second Embodiment)

次に、第2実施形態について説明する。なお、第1実施形態と実質的に同一の部品等については同一の符号を付してその説明を省略する。   Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

図6は、本実施形態に係るプレキャスト床版と梁との接合構造を示した斜視図、図7は同じく平面図及び側面図である。これらの図でわかるように、本実施形態に係るプレキャスト床版と梁との接合構造51は、プレキャスト床版3a,3bの縁部端面2a,2bが対向するように該プレキャスト床版の縁部4a,4bを鉄骨梁5の天端8に載置するとともに、該天端に立設されたスタッド部材58を、プレキャスト床版3a,3bに埋設されそれらの縁部端面2a,2bから延びる鉄筋6a,6bの露出端部7a,7bに添え部材59及び2つの接合具10を介してそれぞれ連結してある。   FIG. 6 is a perspective view showing a joint structure between a precast floor slab and a beam according to this embodiment, and FIG. 7 is a plan view and a side view. As can be seen from these drawings, the joint structure 51 between the precast floor slab and the beam according to the present embodiment is such that the edge portions 2a and 2b of the precast floor slabs 3a and 3b face each other. 4a and 4b are placed on the top end 8 of the steel beam 5, and the stud member 58 erected on the top end is embedded in the precast floor slabs 3a and 3b and extends from the edge end faces 2a and 2b. The exposed end portions 7a and 7b of 6a and 6b are connected to each other via an attachment member 59 and two joints 10, respectively.

すなわち、添え部材59は図8に示すように、互いに直交する2つの真直部61,62が形成されたほぼL字状の部材として構成してあり、その一方の真直部61を第2の連結手段である接合具10を介して鉄骨梁5の天端8に溶接固定されたスタッド部材58に連結してあるとともに、他方の真直部62を第1の連結手段である接合具10を介してプレキャスト床版3aに埋設されその縁部端面2aから延びる鉄筋6aの露出端部7aに連結してある。   That is, as shown in FIG. 8, the attachment member 59 is configured as a substantially L-shaped member in which two straight portions 61 and 62 orthogonal to each other are formed, and one straight portion 61 is connected to the second connection portion. It is connected to a stud member 58 welded and fixed to the top end 8 of the steel beam 5 via a connector 10 as a means, and the other straight portion 62 is connected via a connector 10 as a first connecting means. It is embedded in the precast floor slab 3a and connected to the exposed end 7a of the reinforcing bar 6a extending from the edge end surface 2a.

プレキャスト床版3bについても添え部材59の配置方向が逆向きになる以外はプレキャスト床版3aのときと同様であり、添え部材59は、その真直部61を接合具10を介してスタッド部材58に連結してあるとともに、その真直部62を接合具10を介してプレキャスト床版3bに埋設されその縁部端面2bから延びる鉄筋6bの露出端部7bに連結してある。   The precast floor slab 3b is the same as that of the precast floor slab 3a except that the arrangement direction of the attachment member 59 is reversed. The attachment member 59 has its straight portion 61 connected to the stud member 58 via the connector 10. The straight portion 62 is connected to the exposed end portion 7b of the reinforcing bar 6b which is embedded in the precast floor slab 3b via the connector 10 and extends from the edge end surface 2b.

添え部材59は、その真直部61がスタッド部材58とともに筒体31に挿通できるように構成してあるとともに、その真直部62が鉄筋6aの露出端部7aとともに筒体31に挿通できるように構成してある。   The attachment member 59 is configured such that the straight portion 61 can be inserted into the cylindrical body 31 together with the stud member 58, and the straight portion 62 can be inserted into the cylindrical body 31 together with the exposed end portion 7a of the reinforcing bar 6a. It is.

添え部材59及びスタッド部材58は、鉄筋7a,7bと同径の異形鉄筋で構成してあるとともに、スタッド部材58は図7(a)でよくわかるように鉄骨梁5の材軸方向に沿って千鳥配置してある。なお、スタッド部材58は、現場溶接で鉄骨梁5に固定するようにしてもよいし、予め工場で溶接しておき、鉄骨梁5に固定された状態で現場に搬入するようにしてもかまわない。   The attachment member 59 and the stud member 58 are made of deformed reinforcing bars having the same diameter as the reinforcing bars 7a and 7b, and the stud member 58 is arranged along the material axis direction of the steel beam 5 as can be seen in FIG. Staggered arrangement. Note that the stud member 58 may be fixed to the steel beam 5 by on-site welding, or may be previously welded at the factory and carried to the site while being fixed to the steel beam 5. .

本実施形態に係るプレキャスト床版と梁との接合構造51を施工するには、プレキャスト床版3aを鉄骨梁5の天端8に載置するとともに、添え部材59の真直部61をスタッド部材58とともに接合具10の筒体31に挿通し、真直部62を鉄筋6aの露出端部7aとともに接合具10の筒体31に挿通する。   In order to construct the joint structure 51 between the precast floor slab and the beam according to the present embodiment, the precast floor slab 3a is placed on the top end 8 of the steel beam 5, and the straight portion 61 of the attachment member 59 is connected to the stud member 58. At the same time, the straight part 62 is inserted into the cylindrical body 31 of the connector 10 together with the exposed end 7a of the reinforcing bar 6a.

なお、かかる挿通作業を行う手順にあたっては、現場の状況に応じて適宜選択決定すればよく、例えば、スタッド部材58を鉄骨梁5に先付けすると後工程での接合具10の取付け作業に困難が予想される場合には、工場溶接ではなく現場溶接とするのがよい。この場合には、添え部材59の真直部61をスタッド部材58とともに予め筒体31に挿通しておくとともに、真直部62を鉄筋6aの露出端部7aとともに予め筒体31に挿通しておき、プレキャスト床版3aの載置及び位置決めを行った後、スタッド部材58を鉄骨梁5の天端8に溶接すればよい。   Note that the procedure for performing the insertion work may be appropriately selected and determined in accordance with the situation at the site. For example, if the stud member 58 is preceded by the steel beam 5, it is expected that the work of attaching the connector 10 in a later process will be difficult. If so, it is better to use field welding rather than factory welding. In this case, the straight portion 61 of the attachment member 59 is inserted through the cylindrical body 31 together with the stud member 58 in advance, and the straight portion 62 is inserted through the cylindrical body 31 together with the exposed end portion 7a of the reinforcing bar 6a, After placing and positioning the precast floor slab 3a, the stud member 58 may be welded to the top end 8 of the steel beam 5.

プレキャスト床版3bについても同様の作業を行った後、楔部材34を楔挿通孔33,33に打ち込んで、添え部材59の真直部61とスタッド部材58とを連結するとともに、真直部62と鉄筋6aの露出端部7aとを連結する。   After the same operation is performed on the precast floor slab 3b, the wedge member 34 is driven into the wedge insertion holes 33 and 33 to connect the straight portion 61 of the attachment member 59 and the stud member 58, and the straight portion 62 and the reinforcing bar. The exposed end 7a of 6a is connected.

次に、プレキャスト床版3a,3bの縁部端面2a,2bに挟まれた空間に必要に応じて補強筋を配筋した後、コンクリートを充填して接合作業を完了する。   Next, after reinforcing bars are placed in the space between the edge end faces 2a and 2b of the precast floor slabs 3a and 3b as needed, the concrete is filled and the joining operation is completed.

以上説明したように、本実施形態に係るプレキャスト床版と梁との接合構造51によれば、筒体31及び楔部材34で接合具10を構成し、鉄骨梁5の天端8に立設されたスタッド部材58を、プレキャスト床版3a,3bに埋設されそれらの縁部端面2a,2bから延びる鉄筋6a,6bの露出端部7a,7bに添え部材59及び2つの接合具10を介してそれぞれ連結するようにしたので、プレキャスト床版3a,3bに埋設された鉄筋6a,6bの露出端部7a,7bを、鉄骨梁5に立設されたスタッド部材58に強固に連結することが可能となる。   As described above, according to the joint structure 51 between the precast floor slab and the beam according to the present embodiment, the tubular body 31 and the wedge member 34 constitute the joint 10 and are erected on the top end 8 of the steel beam 5. The stud member 58 is embedded in the precast floor slabs 3a and 3b and is attached to the exposed end portions 7a and 7b of the reinforcing bars 6a and 6b extending from the edge end surfaces 2a and 2b via the attachment members 59 and the two joints 10. Since they are connected to each other, the exposed ends 7a and 7b of the reinforcing bars 6a and 6b embedded in the precast floor slabs 3a and 3b can be firmly connected to the stud member 58 erected on the steel beam 5. It becomes.

そのため、プレキャスト床版3a、プレキャスト床版3b及び鉄骨梁5は、2つの接合具10及び添え部材59を介して一体化されることとなり、かくして、コンクリートやモルタルの付着強度に依存していた従来の接合構造に比べて、より安定した接合強度を確保することが可能となるとともに、鉄筋同士の重ね継手が不要になるため、配筋やコンクリート打設を行う際の作業性が格段に向上する。   Therefore, the precast floor slab 3a, the precast floor slab 3b, and the steel beam 5 are integrated through the two joints 10 and the attachment member 59, and thus depend on the adhesion strength of concrete or mortar. Compared to conventional joint structures, it is possible to ensure a more stable joint strength and eliminate the need for lap joints between rebars, which greatly improves workability when placing bars and placing concrete. .

本実施形態では、本発明に係る添え部材を異形鉄筋で構成したが、これに代えて、円形断面からなる棒鋼で構成してもよい。   In this embodiment, although the accessory member which concerns on this invention was comprised with the deformed reinforcing bar, it may replace with this and may comprise with the steel bar which consists of a circular cross section.

また、本実施形態では、一対のプレキャスト床版3a,3bをそれらの縁部端面が対向するように鉄骨梁5の上に載置する場合について説明したが、構造物の外壁に沿った鉄骨梁にプレキャスト床版を載置する場合についても、本発明を適用できることは言うまでもない。   Moreover, although this embodiment demonstrated the case where a pair of precast floor slabs 3a and 3b were mounted on the steel beam 5 so that those edge part end surfaces might oppose, the steel beam along the outer wall of a structure Needless to say, the present invention can also be applied to a case where a precast slab is placed on the slab.

かかる変形例においては、上述した実施形態において、プレキャスト床版3b、スタッド部材9b及びそれらに関連した部材が省略されるだけでその他の構成は同様であるので、ここではその説明を省略する。   In this modified example, in the above-described embodiment, only the precast floor slab 3b, the stud member 9b, and the members related thereto are omitted, and the other configurations are the same. Therefore, the description thereof is omitted here.

第1実施形態に係るプレキャスト床版と梁との接合構造1を示した斜視図。The perspective view which showed the joining structure 1 of the precast floor slab and beam which concern on 1st Embodiment. 同じくプレキャスト床版と梁との接合構造1を示した図であり、(a)は平面図、(b)はA−A線方向の矢視図。It is the figure which similarly showed the joining structure 1 of a precast floor slab and a beam, (a) is a top view, (b) is an arrow view of the AA line direction. 接合具10を示した図であり、(a)は鉄筋6aの露出端部7aとスタッド部材9aとを接合した様子を示した図、(b)は楔部材34を打ち込む様子を示した図。It is the figure which showed the joining tool 10, (a) is a figure which showed a mode that the exposed end part 7a of the reinforcing bar 6a and the stud member 9a were joined, (b) was a figure which showed a mode that the wedge member 34 was driven. 鉄骨梁5へのスタッド部材9a,9bの取付け状況及び鉄筋との連結状況を示した詳細図であり、(a)及び(c)は側面図、(b)及び(d)は、それぞれB−B線方向、C−C線方向の矢視図。It is the detailed view which showed the attachment condition of the stud members 9a and 9b to the steel beam 5 and the connection condition with the reinforcing bar, (a) and (c) are side views, (b) and (d) are B- The arrow view of the B line direction and CC line direction. 変形例に係るスタッド部材の図。The figure of the stud member concerning a modification. 第2実施形態に係るプレキャスト床版と梁との接合構造51を示した斜視図。The perspective view which showed the junction structure 51 of the precast floor slab and beam which concern on 2nd Embodiment. 同じくプレキャスト床版と梁との接合構造51を示した図であり、(a)は平面図、(b)はD−D線方向の矢視図。It is the figure which similarly showed the junction structure 51 of a precast floor slab and a beam, (a) is a top view, (b) is the arrow line view of DD direction. 添え部材59とスタッド部材58及び鉄筋との連結状況を示した分解斜視図。The disassembled perspective view which showed the connection state of the attachment member 59, the stud member 58, and a reinforcing bar.

符号の説明Explanation of symbols

1,51 プレキャスト床版と梁との接合構造
2a,2b 縁部端面
3a,3b プレキャスト床版
4a,4b プレキャスト床版の縁部
5 鉄骨梁
6a,6b 鉄筋
7a,7b 露出端部
8 天端
9a,9b スタッド部材
10 接合具
31 筒体
33,33 楔挿通孔
34 楔部材
41a,41b 真直部
42a,42b 真直部
43,44 スタッド部材
58 スタッド部材
59 添え部材
61,62 真直部
1,51 Precast floor slab-to-beam joint structure 2a, 2b Edge end surface 3a, 3b Precast floor slab 4a, 4b Precast floor slab edge 5 Steel beam 6a, 6b Reinforcing bar 7a, 7b Exposed end 8 Top end 9a 9b Stud member 10 Joiner 31 Cylindrical body 33, 33 Wedge insertion hole 34 Wedge member 41a, 41b Straight portion 42a, 42b Straight portion 43, 44 Stud member 58 Stud member 59 Attached member 61, 62 Straight portion

Claims (4)

プレキャスト床版に埋設されその縁部端面から延びる鉄筋の露出端部と、前記プレキャスト床版の縁部が載せられる鉄骨梁の天端に立設されたスタッド部材と、前記鉄筋の露出端部及び前記スタッド部材を連結する連結手段とからなり、該連結手段を、前記鉄筋の露出端部及び前記スタッド部材が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記鉄筋の露出端部及び前記スタッド部材との間に圧入される楔部材とで構成したことを特徴とするプレキャスト床版と梁との接合構造。 An exposed end of a reinforcing bar embedded in a precast floor slab and extending from an edge end surface thereof, a stud member erected on the top end of a steel beam on which the edge of the precast floor slab is placed, an exposed end of the reinforcing bar, and A connecting means for connecting the stud member, and the connecting means is inserted in a state where the exposed end portion of the reinforcing bar and the stud member overlap each other by a predetermined length, and a cylindrical body having an oval cross section. A wedge member inserted into a wedge insertion hole formed in each of a pair of opposed flat plate-like wall portions among the wall portions constituting the cylindrical body and press-fitted between the exposed end portion of the reinforcing bar and the stud member. A joint structure of precast floor slabs and beams, characterized by comprising. 前記スタッド部材を、互いに直交する2つの真直部が形成されたほぼL字状のスタッド部材として形成するとともに、該真直部のうち、一方の真直部を前記鉄骨梁に立設できるように、かつ他方の真直部を前記鉄筋の露出端部とともに前記筒体に挿通できるように構成した請求項1記載のプレキャスト床版と梁との接合構造。 The stud member is formed as a substantially L-shaped stud member formed with two straight portions orthogonal to each other, and one straight portion of the straight portions can be erected on the steel beam, and The joint structure of a precast slab and a beam according to claim 1, wherein the other straight part is configured to be inserted into the cylindrical body together with the exposed end of the reinforcing bar. プレキャスト床版に埋設されその縁部端面から延びる鉄筋の露出端部と、前記プレキャスト床版の縁部が載せられる鉄骨梁の天端に立設されたスタッド部材と、互いに直交する2つの真直部が形成されたほぼL字状の添え部材と、該添え部材を構成する2つの真直部のうち、一方の真直部及び前記鉄筋の露出端部を連結する第1の連結手段と、他方の真直部及び前記スタッド部材を連結する第2の連結手段とからなり、前記第1の連結手段を、前記一方の真直部及び前記鉄筋の露出端部が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記一方の真直部及び前記鉄筋の露出端部との間に圧入される楔部材とで構成するとともに、前記第2の連結手段を、前記他方の真直部及び前記スタッド部材が所定長だけ重なった状態で挿通される断面形状が長円状の筒体と、該筒体を構成する壁部のうち、対向する一対の平板状壁部にそれぞれ形成された楔挿通孔に挿通され前記他方の真直部及び前記スタッド部材との間に圧入される楔部材とで構成したことを特徴とするプレキャスト床版と梁との接合構造。 An exposed end portion of a reinforcing bar embedded in a precast floor slab and extending from an edge end surface thereof, a stud member standing on the top end of a steel beam on which the edge of the precast floor slab is placed, and two straight portions orthogonal to each other A first connecting means for connecting one straight portion and the exposed end portion of the reinforcing bar, and the other straight member. And a second connecting means for connecting the stud member, and the first connecting means is inserted in a state where the one straight part and the exposed end of the reinforcing bar overlap each other by a predetermined length. Is inserted into a wedge insertion hole formed in each of a pair of opposing flat plate-like wall portions of the oval cylindrical body and the wall portions constituting the cylindrical body, and the one straight portion and the exposed end of the reinforcing bar And a wedge member that is press-fitted between In addition, the second connecting means is inserted into the other straight part and the stud member in a state where they overlap each other by a predetermined length. Among them, a precast floor comprising a wedge member inserted into a wedge insertion hole formed in each of a pair of opposed flat plate wall portions and press-fitted between the other straight portion and the stud member Joint structure between plate and beam. 前記プレキャスト床版を、縁部端面が互いに対向するように前記鉄骨梁の天端に載せられた一対のプレキャスト床版で構成するとともに、該一対のプレキャスト床版のうち、一方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材と、他方のプレキャスト床版に埋設された鉄筋の露出端部に連結されるスタッド部材とを、前記鉄骨梁の材軸に沿って交互に立設した請求項1乃至請求項3のいずれか一記載のプレキャスト床版と梁との接合構造。 The precast floor slab is composed of a pair of precast floor slabs placed on the top end of the steel beam so that the edge end surfaces face each other, and one of the pair of precast floor slabs A stud member connected to the exposed end of the embedded reinforcing bar and a stud member connected to the exposed end of the reinforcing bar embedded in the other precast slab are alternately arranged along the material axis of the steel beam. The joint structure of the precast slab and the beam according to any one of claims 1 to 3, wherein the structure is a standing structure.
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