JP2016145458A - Joint structure between reinforced column and steel beam - Google Patents

Joint structure between reinforced column and steel beam Download PDF

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JP2016145458A
JP2016145458A JP2015021985A JP2015021985A JP2016145458A JP 2016145458 A JP2016145458 A JP 2016145458A JP 2015021985 A JP2015021985 A JP 2015021985A JP 2015021985 A JP2015021985 A JP 2015021985A JP 2016145458 A JP2016145458 A JP 2016145458A
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steel beam
joint
bearing
column
bearing material
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JP6442314B2 (en
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太郎 印出井
Taro Indei
太郎 印出井
福田　孝晴
Takaharu Fukuda
孝晴 福田
久保田　淳
Atsushi Kubota
淳 久保田
直樹 狩野
Naoki Kano
直樹 狩野
紘子 高山
Hiroko Takayama
紘子 高山
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Kajima Corp
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Abstract

PROBLEM TO BE SOLVED: To penetrate through a joint between a column of a reinforced concrete structure and a beam in one direction, or eliminate the need for welding to the steel beam of a bearing material upon installing the bearing material in the flange of the steel beam buried in the end and disposed in the joint for transmitting an axial force from the steel beam to the concrete of the joint, and thereby apply an application as a temporary construction material to the bearing material while simplifying on-site installation operation.SOLUTION: A bearing material 5 having a bearing plate 51 forming a surface perpendicular to a material axis of a steel beam 2 is installed in an outer circumferential side of at least any one of column main reinforcements 3 on an upper flange 21 and below a lower flange 22 of the steel beam 2, and is held to the steel beam 2 or in any part other than the steel beam 2.SELECTED DRAWING: Figure 1

Description

本発明は鉄筋コンクリート造の柱と梁との接合部を一方向に貫通する、または端部において埋設される鉄骨梁からの軸方向力等を接合部のコンクリートに伝達するための支圧材を鉄骨梁のフランジに設置した鉄筋コンクリート柱と鉄骨梁の接合部構造に関するものである。   The present invention provides a bearing material for transmitting an axial force or the like from a steel beam penetrating a reinforced concrete column-to-beam joint in one direction or embedded in an end to the concrete of the joint. It relates to the joint structure of reinforced concrete columns and steel beams installed on the flange of the beam.

鉄筋コンクリート造の柱と梁との接合部を鉄骨梁が一方向に貫通した状態で、または端部において埋設された状態で接合部に配置される場合、接合部に位置する鉄骨梁のフランジからは軸方向力と曲げモーメントが接合部に支圧力として伝達されるため、鉄骨梁の上下のフランジには支圧力伝達のための支圧材が設置される（特許文献１〜３参照）。   When the steel beam is pierced in one direction through the joint between the reinforced concrete column and beam, or is embedded in the end, the flange of the steel beam located at the joint Since axial force and bending moment are transmitted to the joint as bearing pressure, bearing members for transmitting bearing pressure are installed on the upper and lower flanges of the steel beam (see Patent Documents 1 to 3).

鉄骨梁からの応力が支圧材を通じて接合部のコンクリートに伝達される際、支圧材と鉄骨梁のフランジが一体となって支圧力を負担するよう、支圧材は通常、鉄骨梁の上下のフランジに溶接等により固定されることになる（特許文献１、２）。この場合、支圧材は鉄骨梁への固定精度の確保上、鉄骨梁の製作時に工場で予め溶接される必要があることから、支圧材付きの鉄骨梁の製作には手間を要するため、製作コストが上昇する傾向がある。   When the stress from the steel beam is transmitted to the concrete at the joint through the bearing material, the bearing material is usually placed on the upper and lower sides of the steel beam so that the bearing member and the flange of the steel beam can bear the bearing pressure together. It is fixed to the flange by welding or the like (Patent Documents 1 and 2). In this case, since the bearing material needs to be welded in advance at the factory when the steel beam is manufactured in order to secure the fixing accuracy to the steel beam, it takes time to produce the steel beam with the bearing material. Production costs tend to increase.

これに対し、特許文献３では支圧材の構成材としてＬ形断面の鋼材を使用しながら、支圧材を平面上、接合部を包囲する方形状に形成し、平面上の隅角部に形成した挿通孔に柱主筋を挿通させて支圧材の両面側からナットを緊結することで、支圧材を柱主筋に保持させ、支圧材の鉄骨梁への溶接を不要にしている（段落００１２、００１３）。   On the other hand, in Patent Document 3, while using a steel material having an L-shaped cross section as a constituent material of the bearing material, the bearing material is formed in a rectangular shape surrounding the joint on the plane and on the corners on the plane. By inserting the column main reinforcement into the formed insertion hole and tightening the nuts from both sides of the bearing material, the bearing material is held on the column reinforcement, making it unnecessary to weld the bearing material to the steel beam ( Paragraphs 0012, 0013).

特開平７−２２９２０２号公報（請求項１、段落００１０〜００１６、図１〜図４）JP-A-7-229202 (Claim 1, paragraphs 0010 to 0016, FIGS. 1 to 4) 実開平６−１０４０２号公報（請求項１、段落００１０〜００１３、図１〜図３）Japanese Utility Model Publication No. 6-10402 (Claim 1, paragraphs 0010 to 0013, FIGS. 1 to 3) 特開２０００−２６５５５５号公報（請求項１、段落００１２〜００１４、図１〜図３）JP 2000-265555 A (Claim 1, paragraphs 0012 to 0014, FIGS. 1 to 3)

但し、特許文献３では支圧材の隅角部に形成した挿通孔に柱主筋を現場で挿通（螺合）させなければならないため、支圧材の挿通孔に製作誤差があるか、支圧材と柱主筋の少なくともいずれかに施工誤差があれば、柱主筋を支圧材の挿通孔に挿通させることが難しくなる。一方、挿通孔が柱主筋の径より大きめに形成されていれば、上下のナットの緊結による摩擦力により支圧材を柱主筋に保持させる必要があるため、現場での作業性が極端に低下する。   However, in Patent Document 3, since the column main reinforcement must be inserted (screwed) into the insertion hole formed in the corner portion of the bearing material at the site, there is a manufacturing error in the insertion hole of the bearing material. If there is a construction error in at least one of the material and the column main reinforcement, it is difficult to insert the column main reinforcement into the insertion hole of the bearing material. On the other hand, if the insertion hole is formed larger than the diameter of the column main bar, it is necessary to hold the bearing material on the column main bar by the frictional force of the upper and lower nuts. To do.

また特許文献１、２のように支圧材を鉄骨梁のフランジに溶接等により固定するか、特許文献３のように柱主筋に保持させる方法では、支圧材を構造材から分離させて単体で使用することができないため、支圧材に応力伝達材としての機能を果たさせながら、仮設材としての用途を併せ持たせることはできない。   Further, in the method of fixing the bearing material to the flange of the steel beam by welding or the like as in Patent Documents 1 and 2, or holding it to the column main bars as in Patent Document 3, the bearing material is separated from the structural material and is used alone. Therefore, it is not possible to have a use as a temporary material while allowing the bearing material to function as a stress transmission material.

本発明は上記背景より、支圧材の鉄骨梁への溶接を不要にし、工場での鉄骨梁の製作作業を単純化させながら、支圧材に仮設材としての用途を付与し得る鉄筋コンクリート柱と鉄骨梁の接合部構造を提案するものである。   From the background described above, the present invention eliminates the need for welding the bearing material to the steel beam, simplifies the production work of the steel beam in the factory, and provides the bearing material with a use as a temporary material. A steel beam joint structure is proposed.

請求項１に記載の発明の鉄筋コンクリート柱と鉄骨梁の接合部構造は、鉄筋コンクリート造の柱と梁との接合部に上部フランジ及び下部フランジを有する鉄骨梁が一方向に貫通した状態で、または端部において埋設された状態で配置され、前記鉄骨梁のフランジを幅方向に挟み込む位置に柱主筋が配筋された柱・梁の接合部において、
前記鉄骨梁の前記上部フランジ上と前記下部フランジ下の少なくともいずれか一方の前記柱主筋の外周側に、前記鉄骨梁の材軸に直交する面をなす支圧板を持つ支圧材が設置され、この支圧材が前記鉄骨梁に、または前記鉄骨梁以外のいずれかの部位に保持された状態で、前記支圧材を含む接合部の領域にコンクリートが打設されていることを構成要件とする。 The joint structure of a reinforced concrete column and a steel beam according to the first aspect of the present invention is a state in which a steel beam having an upper flange and a lower flange penetrates in one direction at a joint between a reinforced concrete column and a beam, or an end In the column / beam joint where the column main reinforcement is arranged at a position where the flange of the steel beam is sandwiched in the width direction, being arranged in a state where it is embedded in the part,
A bearing member having a bearing plate that forms a surface perpendicular to the material axis of the steel beam is installed on the outer peripheral side of the column main bar on at least one of the upper flange and the lower flange of the steel beam, With this bearing material held in the steel beam or in any part other than the steel beam, the concrete is placed in the region of the joint including the bearing material and To do.

請求項１における「接合部に鉄骨梁が端部において埋設された状態で配置され」とは、図２に示すように鉄骨梁の端部が接合部から突出することなく接合部内に留まり、接合部内に埋め込まれた（埋設された）状態で鉄骨梁が接合部に配置されることを言い、「埋設」は「定着」とも言い換えられる。柱は現場打ちコンクリート造の場合とプレキャストコンクリート製の場合の他、両者の合成構造の場合がある。接合部に配置される鉄骨梁に直交する方向には、プレキャストコンクリート等の鉄筋コンクリート造の梁が配置される場合と、接合部に鉄骨梁にピン接合される鉄骨梁が配置される場合の他、何も配置されない場合がある。   The phrase “disposed in the state where the steel beam is embedded in the end portion” in claim 1 means that the end portion of the steel beam stays in the joint portion without protruding from the joint portion as shown in FIG. This means that the steel beam is placed in the joint in a state of being embedded (embedded) in the part, and “embedding” is also referred to as “fixing”. The pillar may be a cast-in-place concrete structure, a precast concrete structure, or a composite structure of both. In the direction orthogonal to the steel beam arranged at the joint, in addition to the case where a reinforced concrete beam such as precast concrete is arranged, and the case where the steel beam pinned to the steel beam is arranged at the joint, There is a case where nothing is arranged.

柱主筋３は図１、図２に示すように平面上、二方向の、もしくは一方向の梁との干渉がない領域に配筋されるが、図１、図２では接合部６に配置される鉄骨梁２に直交する方向の梁を省略している。鉄骨梁２に直交する鉄筋コンクリート造の梁もプレキャストコンクリート製の場合と現場打ちコンクリート造の場合の他、両者の合成構造の場合がある。   As shown in FIGS. 1 and 2, the column main reinforcement 3 is arranged in a plane, in a region where there is no interference with the beam in two directions or in one direction, but in FIG. 1 and FIG. The beam in the direction orthogonal to the steel beam 2 is omitted. The reinforced concrete beam perpendicular to the steel beam 2 may be a precast concrete or a cast-in-place concrete structure, or a composite structure of both.

請求項１における「鉄骨梁の材軸に直交する面をなす支圧板を持つ支圧材」とは、支圧材５が鉄骨梁２の材軸に直交する面をなす板要素としての支圧板５１を持つことを言う。「上部フランジ上と下部フランジ下の少なくともいずれか一方」とは、支圧材５が上部フランジ２１上にのみ設置される場合と、下部フランジ２２下にのみ設置される場合と、上部フランジ２１上と下部フランジ２２下にのみ設置される場合があることを言う。支圧材５は図１に示すように鉄骨梁２が接合部６を貫通する場合には、鉄骨梁２の少なくともいずれか一方のフランジ２１、２２に接合部６の中心を挟んで対になって配置される。図２に示すように鉄骨梁２が端部において埋設された状態で接合部６に配置される場合には、支圧材５は鉄骨梁２の少なくともいずれか一方のフランジ２１、２２の柱１との交差部（柱１の表面）側にのみ配置される。   The “bearing material having a bearing plate that forms a surface perpendicular to the material axis of the steel beam” in claim 1 is a bearing plate as a plate element in which the bearing material 5 forms a surface that is orthogonal to the material axis of the steel beam 2. Say to have 51. “At least one of the upper flange and the lower flange” refers to the case where the bearing material 5 is installed only on the upper flange 21, the case where it is installed only under the lower flange 22, the upper flange 21 and the lower flange It means that it may be installed only under the flange 22. As shown in FIG. 1, when the steel beam 2 passes through the joint portion 6, the bearing member 5 is paired with the center of the joint portion 6 sandwiched between at least one of the flanges 21 and 22 of the steel beam 2. Arranged. As shown in FIG. 2, when the steel beam 2 is disposed at the joint 6 in a state where the steel beam 2 is embedded at the end, the bearing material 5 is the column 1 of at least one of the flanges 21 and 22 of the steel beam 2. It is arrange | positioned only at the cross | intersection part (surface of the pillar 1) side.

支圧材５として形鋼を使用する場合、鉄骨梁２の上部フランジ２１と下部フランジ２２に重なって設置されたときに自ら安定する上では例えば山形鋼や溝形鋼、Ｔ形鋼等の形態が適するが、柱主筋３やその周囲に配筋されるせん断補強筋４に結束される等により設置状態で安定性を確保することができればプレートやフラットバーも使用可能である。プレート等の場合、支圧材５は支圧板５１のみからなる。支圧材５は鉄骨梁２の材軸に直交する面をなす支圧板５１を持てばよいため、必ずしも形鋼である必要はない。   In the case of using a shape steel as the bearing material 5, in order to stabilize itself when installed on the upper flange 21 and the lower flange 22 of the steel beam 2, for example, forms such as angle steel, channel steel, T-shape steel, etc. However, a plate or a flat bar can also be used if stability can be ensured in the installed state by being tied to the column reinforcement 3 or the shear reinforcement 4 arranged around the column reinforcement. In the case of a plate or the like, the bearing material 5 is composed only of the bearing plate 51. Since the bearing member 5 only needs to have a bearing plate 51 that forms a surface orthogonal to the material axis of the steel beam 2, the bearing member 5 is not necessarily a shape steel.

支圧材５を鉄骨梁２に固定（溶接）しない趣旨は、支圧材５を鉄骨梁２のフランジ２１、２２に溶接することによる工場での鉄骨梁２の製作の手間を解消し、接合部用鉄骨梁の製作コストを削減することと、支圧材５を鉄骨梁２から分離させておくことで、図５に示すように支圧材５に例えば鉄骨梁２を直下の柱１に支持させるための仮設材（支持材）としての用途を持たせることにある。このため、支圧材５は鉄骨梁２の上部フランジ２１上と下部フランジ２２下に重なって設置された状態で、鉄骨梁２に固定されずに、少なくとも何らかの形で接合部６へのコンクリートの打設時に鉄骨梁２から移動しない程度に保持されていればよく、保持の方法は問われない。   The purpose of not fixing (welding) the bearing material 5 to the steel beam 2 is to eliminate the labor of manufacturing the steel beam 2 in the factory by welding the bearing material 5 to the flanges 21 and 22 of the steel beam 2 and joining them. By reducing the manufacturing cost of the steel beam for the part and separating the bearing material 5 from the steel beam 2, the steel beam 2, for example, the column 1 directly below is provided in the bearing material 5 as shown in FIG. 5. The purpose is to provide a use as a temporary material (support material) for supporting. For this reason, the bearing material 5 is placed on the upper flange 21 and the lower flange 22 of the steel beam 2 so as not to be fixed to the steel beam 2 but at least in some form. What is necessary is just to hold | maintain to the extent which does not move from the steel beam 2 at the time of installation, and the method of holding is not ask | required.

具体的には柱主筋３、またはせん断補強筋４に支圧材５を結束させる、鉄骨梁２のフランジ２１、２２やせん断補強筋４に接着させる、柱主筋３やせん断補強筋４に接合部６の中心側へ係止させながら、いずれかの部位に保持させる等の方法が考えられる。この他、図５に示すように鉄骨梁２を支持する柱１の側面や天端にボルト９等により接続（固定）されること（請求項２）も含まれる。   Specifically, the supporting member 5 is bound to the column main reinforcement 3 or the shear reinforcement 4, the flange 21, 22 of the steel beam 2 and the shear reinforcement 4 are bonded, and the joint to the column reinforcement 3 or the shear reinforcement 4 is joined. A method is conceivable, such as holding it in any part while being locked to the center side of 6. In addition, as shown in FIG. 5, it is connected (fixed) to the side surface or top end of the column 1 supporting the steel beam 2 with a bolt 9 or the like (Claim 2).

請求項１における「支圧材が鉄骨梁に、または鉄骨梁以外のいずれかの部位に保持され」とは、支圧材５が鉄骨梁２か、鉄骨梁２以外のいずれかの部位に何らかの方法で接合部６へのコンクリートの打設時の圧力に抵抗しながら、設置状態を維持し得る程度に保持されることを言う。支圧材５がコンクリートの打設圧力に抵抗し得る程度に鉄骨梁２かそれ以外のいずれかの部位に拘束されていれば、コンクリートへの埋設により鉄骨梁２に一体化した状態になるため、鉄骨梁２からの応力を接合部６へ伝達する機能を発揮することが可能になる。「いずれかの部位」は鉄骨梁２以外の柱主筋３、せん断補強筋４、柱１、または接合部６用、もしくは柱１用のせき板等を指す。   “The bearing material is held in the steel beam or in any part other than the steel beam” in claim 1 means that the bearing material 5 is in any part other than the steel beam 2 or the steel beam 2. It means that it is maintained to such an extent that the installation state can be maintained while resisting the pressure at the time of placing concrete on the joint 6 by the method. If the bearing material 5 is constrained to the steel beam 2 or any other part to the extent that it can resist the concrete pouring pressure, it will be integrated with the steel beam 2 by embedding in the concrete. The function of transmitting the stress from the steel beam 2 to the joint 6 can be exhibited. “Any part” refers to a column main bar 3 other than the steel beam 2, a shear reinforcement bar 4, a column 1, a joint 6, or a column plate for the column 1.

支圧材５を鉄骨梁２に溶接等により固定する必要がないことで、支圧材５を鉄骨梁２に固定する場合より鉄骨梁２の製作が単純化されるため、鉄骨梁２に支圧材５を固定する場合程の製作コストを要せず、鉄骨梁２の製作性が向上する。また支圧材５を鉄骨梁２から分離させておくことができることで、現場において支圧材５を本来の用途以外の仮設材として単独で使用することができるため、支圧材５の用途の幅が拡大する。   Since it is not necessary to fix the bearing member 5 to the steel beam 2 by welding or the like, the production of the steel beam 2 is simplified compared to the case where the bearing member 5 is fixed to the steel beam 2. The production cost of the steel beam 2 is improved without requiring the production cost of fixing the pressure member 5. In addition, since the bearing member 5 can be separated from the steel beam 2, the bearing member 5 can be used alone as a temporary material other than the original application at the site. The width increases.

特に図５に示すように鉄骨梁２の下部フランジ２２の下に配置される支圧材５が鉄骨梁２の下に配置される柱１の側面等に接続される場合（請求項２）には、支圧材５に本来の応力伝達部材としての役割と、鉄骨梁２を下層側の柱１に支持させるための支持部材としての役割を果たさせることができるため、鉄骨梁２を柱１に支持させるための専用の支持部品を別途、必要とせず、使用仮設材の削減が図られる利点がある。   In particular, as shown in FIG. 5, when the bearing member 5 disposed under the lower flange 22 of the steel beam 2 is connected to the side surface of the column 1 disposed under the steel beam 2 (Claim 2). Since the bearing member 5 can play a role as an original stress transmission member and a support member for supporting the steel beam 2 on the lower column 1, the steel beam 2 can be used as a column. There is an advantage that a temporary support material can be reduced without requiring a dedicated support component for supporting the first temporary component.

鉄骨梁２を柱１の側面等に接続された支圧材５に支持させることは、構築済みの、またはプレキャストコンクリート製の下層側の柱１の天端と鉄骨梁２の下部フランジ２２との間の距離が支圧材５の高さ程度になる場合に可能である。図５に示す例では支圧材５が柱１の対向する両側面等に固定され、対になることで、支圧材５は鉄骨梁２のレベルと水平状態を調整する機能も果たしている。この場合、鉄骨梁２の上部フランジ２１上に設置される支圧材５は柱主筋３やせん断補強筋４等に保持されることになる。   Supporting the steel beam 2 to the bearing member 5 connected to the side surface or the like of the column 1 means that the top end of the lower column 1 made of precast concrete or the lower flange 22 of the steel beam 2 is made. This is possible when the distance between them is about the height of the bearing material 5. In the example shown in FIG. 5, the bearing member 5 is fixed to the opposite side surfaces of the column 1 and is paired so that the bearing member 5 also functions to adjust the level and horizontal state of the steel beam 2. In this case, the bearing member 5 installed on the upper flange 21 of the steel beam 2 is held by the column main reinforcement 3, the shear reinforcement 4 and the like.

鉄骨梁の材軸に直交する面をなす支圧板を持つ支圧材を鉄骨梁の上部フランジ上と下部フランジ下の少なくともいずれか一方の柱主筋の外周側に設置し、鉄骨梁に、または鉄骨梁以外のいずれかの部位に保持させることで、支圧材を鉄骨梁に溶接等により固定する必要性を解消するため、鉄骨梁の製作が単純化され、鉄骨梁に支圧材を固定する場合より鉄骨梁の製作コストを低減することができる。   A bearing member with a bearing plate that is perpendicular to the steel beam axis is placed on the outer periphery of at least one of the column main bars on the upper and lower flanges of the steel beam, on the steel beam, or on the steel beam. When the support material is fixed to the steel beam by simplifying the production of the steel beam to eliminate the need to fix the support material to the steel beam by welding etc. The manufacturing cost of the steel beam can be further reduced.

また支圧材を鉄骨梁に溶接する必要がなく、鉄骨梁から分離させておくことができることで、支圧材を鉄骨梁を柱に支持させるための支持材等としても兼用することができるため、支圧材の用途の幅が広がる。   In addition, since it is not necessary to weld the bearing material to the steel beam and can be separated from the steel beam, the bearing material can also be used as a support material for supporting the steel beam to the column. , The range of applications of bearing material is expanded.

鉄骨梁が柱・梁の接合部を一方向に貫通する場合の、鉄骨梁の上部フランジ上と下部フランジ下に支圧材を設置した様子を示した斜視図である。It is the perspective view which showed a mode that the bearing material was installed on the upper flange of a steel beam and the lower flange when a steel beam penetrates the junction part of a column and a beam in one direction. 鉄骨梁が柱・梁の接合部に端部において埋設された状態で配置された場合の、鉄骨梁の上部フランジ上と下部フランジ下に支圧材を設置した様子を示した斜視図である。It is the perspective view which showed a mode that the bearing material was installed on the upper flange of the steel beam and the lower flange when the steel beam is arrange | positioned in the state embedded at the edge part in the junction part of a column and a beam. （ａ）は図１に示す例の場合に、柱主筋とせん断補強筋が接合部を含め、柱のコンクリート内に配筋されている様子を示した立面図、（ｂ）は（ａ）のｘ−ｘ線断面図である。(A) is an elevation view showing a state in which the column main reinforcement and the shear reinforcement are arranged in the concrete of the column including the joint in the example shown in FIG. 1, and (b) is (a). FIG. （ａ）は図２に示す例の場合に、柱主筋とせん断補強筋が接合部を含め、柱のコンクリート内に配筋されている様子を示した立面図、（ｂ）は（ａ）のｘ−ｘ線断面図である。(A) is an elevation view showing a state in which the column main reinforcement and the shear reinforcement are arranged in the concrete of the column including the joint in the example shown in FIG. 2, and (b) is (a). FIG. 接合部下の柱の側面に接続した支圧材に接合部を貫通する鉄骨梁を支持させた場合の支圧材の使用例を示した一部断面立面図である。It is the partial cross section elevation which showed the usage example of the bearing material when the steel beam which penetrates a junction part is supported by the bearing material connected to the side surface of the column under a junction part.

図１、図２は鉄筋コンクリート造の柱１と梁との接合部６に上部フランジ２１及び下部フランジ２２を有する鉄骨梁２が一方向に貫通した状態で、または端部において埋設された状態で配置され、鉄骨梁２のフランジ２１、２２を幅方向に挟み込む位置に柱主筋３が配筋され、鉄骨梁２の上部フランジ２１上と下部フランジ２２下の少なくともいずれか一方に鉄骨梁２の材軸に直交する面をなす支圧板５１を持つ支圧材５が設置された鉄筋コンクリート柱と鉄骨梁の接合部６の構成例を示す。支圧材５は支圧板５１が上部フランジ２１と下部フランジ２２に直交する面をなし、上部フランジ２１の上面と下部フランジ２２の下面の少なくともいずれか一方に重なった状態で設置される。図１は鉄骨梁２が接合部６を一方向に貫通して接合部６に配置された場合、図２は鉄骨梁２が端部において接合部６に埋設された状態で接合部６に配置された場合の例を示す。   1 and 2 are arranged in a state in which a steel beam 2 having an upper flange 21 and a lower flange 22 penetrates in one direction at a joint 6 between a reinforced concrete column 1 and a beam, or is embedded in an end portion. The column main reinforcement 3 is arranged at a position where the flanges 21 and 22 of the steel beam 2 are sandwiched in the width direction, and the material axis of the steel beam 2 is placed on at least one of the upper flange 21 and the lower flange 22 of the steel beam 2. The structural example of the junction part 6 of the reinforced concrete column and steel beam in which the bearing material 5 with the bearing plate 51 which makes an orthogonal surface is installed is shown. The bearing member 5 is installed in a state in which the bearing plate 51 forms a surface orthogonal to the upper flange 21 and the lower flange 22 and overlaps at least one of the upper surface of the upper flange 21 and the lower surface of the lower flange 22. FIG. 1 shows a case where the steel beam 2 passes through the joint 6 in one direction and is arranged in the joint 6. FIG. 2 shows that the steel beam 2 is arranged in the joint 6 with the end embedded in the joint 6. An example of this is shown.

支圧材５は図１〜図４に示すように接合部６の中心に関して柱主筋３の外周側に配置され、鉄骨梁２に、または鉄骨梁２以外のいずれかの部位に何らかの手段で保持（拘束）され、支圧材５を含む接合部６の領域に打設されるコンクリート中に埋設される。支圧材５は接合部６のコンクリート中に完全に埋設される必要はなく、図３、図４に示すように接合部６の中心に関して支圧板５１の外側の面（表面）がコンクリートから露出する、あるいは支圧板５１の外側の面が接合部６のコンクリートの表面と面一になる場合もある。   As shown in FIGS. 1 to 4, the bearing member 5 is arranged on the outer peripheral side of the column main bar 3 with respect to the center of the joint 6, and is held on the steel beam 2 or on any part other than the steel beam 2 by some means. It is (constrained) and buried in the concrete cast in the region of the joint 6 including the bearing material 5. The bearing member 5 does not need to be completely embedded in the concrete of the joint 6, and the outer surface (surface) of the bearing plate 51 is exposed from the concrete with respect to the center of the joint 6 as shown in FIGS. 3 and 4. Or, the outer surface of the bearing plate 51 may be flush with the concrete surface of the joint 6.

図面では支圧材５として山形鋼を使用することで、鉄骨梁２の上部フランジ２１と下部フランジ２２に直交する面をなし、鉄骨梁２からの応力を接合部６に伝達する支圧板５１と、鉄骨梁２のフランジ２１、２２に重なる支持板５２を有するＬ形断面形状に支圧材５を形成しているが、支圧材５は少なくとも支圧板５１を持てばよく、支圧材５の形態は問われない。支圧材５は山形鋼の他、溝形鋼等も使用される。   In the drawing, angle bearing steel 5 is used as the bearing member 5 to form a surface perpendicular to the upper flange 21 and the lower flange 22 of the steel beam 2 and to transmit the stress from the steel beam 2 to the joint 6. The bearing member 5 is formed in an L-shaped cross section having a support plate 52 that overlaps the flanges 21 and 22 of the steel beam 2, but the bearing member 5 only needs to have at least the bearing plate 51. The form of is not questioned. As the bearing material 5, groove steel or the like is used in addition to angle steel.

図１〜図４は接合部６の下に位置する柱１のコンクリートが打設され、接合部６に鉄骨梁２が配置され、鉄骨梁２の周囲に柱主筋３と柱主筋３を拘束するせん断補強筋４が配筋された状況を示すが、柱１は全体が現場打ちコンクリート造で構築される他、少なくとも一部がプレキャストコンクリートで製作されている場合もある。   1 to 4, the concrete of the column 1 located below the joint portion 6 is placed, the steel beam 2 is arranged at the joint portion 6, and the column main reinforcement 3 and the column main reinforcement 3 are constrained around the steel beam 2. Although the state where the shear reinforcement bars 4 are arranged is shown, the column 1 may be entirely made of a cast-in-place concrete structure, and at least a part thereof may be made of precast concrete.

図１、図３は鉄骨梁２が接合部６を貫通し、鉄骨梁２の軸方向両端部が接合部６の周囲（端部）から突出する場合の鉄骨梁２の配置例を示す。図２、図４は鉄骨梁２の軸方向の一方の端部が接合部６内に埋め込まれ、他方の端部が接合部６から突出した（張り出した）場合の鉄骨梁２の配置例を示す。接合部６に配置された図示する鉄骨梁２に直交する方向にはプレキャストコンクリート等のコンクリート梁が接合されることもあり、プレキャストコンクリート梁の一部が鉄骨梁２の側面に突き合わせられていることもある。接合部６を貫通した鉄骨梁２の両端部、または一方の端部が接合部６に埋め込まれた鉄骨梁２の他方の端部には隣接する柱１との間に架設される鉄骨梁が接合される。図１〜図４では接合部６を貫通した、または接合部６に埋め込まれた鉄骨梁２に直交する方向の梁は省略されている。   FIG. 1 and FIG. 3 show an arrangement example of the steel beam 2 when the steel beam 2 penetrates the joint portion 6 and both axial end portions of the steel beam 2 protrude from the periphery (end portion) of the joint portion 6. 2 and 4 show examples of the arrangement of the steel beams 2 when one end portion in the axial direction of the steel beam 2 is embedded in the joint portion 6 and the other end portion protrudes (overhangs) from the joint portion 6. Show. A concrete beam such as precast concrete may be joined in a direction orthogonal to the illustrated steel beam 2 arranged in the joint 6, and a part of the precast concrete beam is butted against the side surface of the steel beam 2. There is also. At both ends of the steel beam 2 penetrating the joint 6, or at the other end of the steel beam 2 in which one end is embedded in the joint 6, a steel beam laid between the adjacent columns 1 is provided. Be joined. 1-4, the beam of the direction orthogonal to the steel beam 2 which penetrated the junction part 6 or was embedded in the junction part 6 is abbreviate | omitted.

接合部６、あるいは柱１の平面上の隅角部である鉄骨梁２の幅方向両側位置には柱主筋３が配筋され、各隅角部の柱主筋３の周囲に、柱１のせん断補強筋を兼ね、全柱主筋３を拘束するフープ等のせん断補強筋４が配筋される。接合部６のせん断補強筋４、すなわち鉄骨梁２の上部フランジ２１と下部フランジ２２間に位置するせん断補強筋４は例えば鉄骨梁２のウェブ２３に形成された挿通孔２３ａを貫通して配筋される。接合部６のせん断補強筋４は鉄骨梁２に直交する方向のコンクリート梁も貫通することになる。   Column main bars 3 are arranged at both sides in the width direction of the steel beam 2 which is a corner portion on the plane of the joint 6 or the column 1, and the column 1 is sheared around the column main bars 3 at each corner portion. A shear reinforcing bar 4 such as a hoop that also serves as a reinforcing bar and restrains all the column main bars 3 is arranged. The shear reinforcement 4 of the joint 6, that is, the shear reinforcement 4 positioned between the upper flange 21 and the lower flange 22 of the steel beam 2, for example, penetrates through an insertion hole 23 a formed in the web 23 of the steel beam 2. Is done. The shear reinforcement 4 of the joint 6 also penetrates the concrete beam in the direction orthogonal to the steel beam 2.

鉄骨梁２のウェブ２３に挿通孔２３ａを形成する場合、接合部６のコンクリートの打設時にはコンクリートが挿通孔２３ａ内に入り込むことで、ウェブ２３とコンクリートとの間のウェブ２３の面内方向に作用するせん断力に対し、ウェブ２３両面におけるコンクリートとの付着力に加え、挿通孔２３ａ内に存在する柱状のコンクリートの外周面と挿通孔２３ａの内周面との間に作用する支圧力と、挿通孔２３ａ内のコンクリート両端面におけるせん断抵抗力が抵抗力として付加される。   When the insertion hole 23 a is formed in the web 23 of the steel beam 2, the concrete enters the insertion hole 23 a when placing the concrete in the joint 6, so that the web 23 is in the in-plane direction between the web 23 and the concrete. In addition to the adhesion force to the concrete on both surfaces of the web 23, the supporting pressure acting between the outer peripheral surface of the columnar concrete existing in the insertion hole 23a and the inner peripheral surface of the insertion hole 23a, against the acting shear force, Shear resistance at both ends of the concrete in the insertion hole 23a is added as resistance.

図１〜図４では平面上、支圧材５を接合部６の中心に関してせん断補強筋４の外周側に配置している様子を示しているが、少なくとも支圧板５１が接合部６のコンクリート内に配置されていれば、支圧材５の平面上の設置位置は問われない。図１〜図４は支圧板５１の、接合部６の外側寄りの表面が柱１の表面と面一になるように支圧材５を接合部６のコンクリート内に配置することで、支圧板５１を接合部６に打設されるコンクリートのせき板の一部を兼用させた場合の状況を示している。   1 to 4 show a state in which the bearing material 5 is arranged on the outer peripheral side of the shear reinforcing bar 4 with respect to the center of the joint 6 on a plane, but at least the bearing plate 51 is in the concrete of the joint 6. If it is arrange | positioned, the installation position on the plane of the bearing material 5 will not be ask | required. 1 to 4 show that the bearing plate 5 is arranged in the concrete of the joint 6 so that the outer surface of the joint 6 of the bearing plate 51 is flush with the surface of the column 1. This shows a situation where 51 is also used as a part of a concrete slat placed on the joint 6.

図１〜図４ではまた、鉄骨梁２の上部フランジ２１と下部フランジ２２間に、支圧材５と共に鉄骨梁２からの応力を接合部６のコンクリートに伝達するための支圧プレート７を配置し、上部フランジ２１と下部フランジ２２に溶接等により接合した場合の例を示している。この支圧プレート７は支圧材５の支圧板５１と共に接合部６に打設されるコンクリートのせき板を兼ねる。   1 to 4, a support plate 7 for transmitting stress from the steel beam 2 to the concrete of the joint 6 together with the support material 5 is disposed between the upper flange 21 and the lower flange 22 of the steel beam 2. And the example at the time of joining to the upper flange 21 and the lower flange 22 by welding etc. is shown. This bearing plate 7 also serves as a concrete dam plate placed on the joint 6 together with the bearing plate 51 of the bearing member 5.

支圧材５は鉄骨梁２の上部フランジ２１上、もしくは下部フランジ２２下に、または図示するように上部フランジ２１上と下部フランジ２２下に配置された状態で、例えば柱主筋３やせん断補強筋４に、または接合部６の回りに組み立てられる接合部６用、あるいは柱１用のせき板に結束されるか、接着剤やモルタル等を用いて接着されることによりフランジ２１、２２に設置された状態で拘束される。この他、支圧材５はフランジ２１、２２とせん断補強筋４に鉛直方向に挟み込まれることにより、または接合部６の外周側から中心側へ向かって柱主筋３やせん断補強筋４に係止しながら、せん断補強筋４等に保持される等によりフランジ２１、２２に設置された状態で拘束されるが、支圧材５のフランジ２１、２２への拘束方法はこれらには限られない。   The bearing material 5 is disposed on the upper flange 21 or the lower flange 22 of the steel beam 2 or on the upper flange 21 and the lower flange 22 as shown in the figure, for example, the column main reinforcement 3 and the shear reinforcement 4. Or bonded to the slats for the joint 6 or the pillar 1 assembled around the joint 6 or bonded to the flanges 21 and 22 by using an adhesive or mortar. Restrained in state. In addition, the bearing material 5 is locked to the column main reinforcement 3 or the shear reinforcement 4 by being sandwiched between the flanges 21 and 22 and the shear reinforcement 4 in the vertical direction or from the outer peripheral side to the center of the joint 6. However, although it restrains in the state installed in the flanges 21 and 22 by being hold | maintained at the shear reinforcement 4 etc., the restraining method to the flanges 21 and 22 of the bearing material 5 is not restricted to these.

図５は支圧材５を鉄骨梁２からの応力の接合部６への伝達材としての役割に加え、鉄骨梁２を接合部６下の柱１に支持させるための支持材としての役割を持たせた場合の、支圧材５の使用例を示す。この場合の支圧材５は応力伝達材と鉄骨梁支持材を兼ねる。   FIG. 5 shows a role as a support material for supporting the steel beam 2 to the column 1 below the joint 6 in addition to the role of the bearing material 5 as a material for transmitting the stress from the steel beam 2 to the joint 6. The usage example of the bearing material 5 in the case of holding is shown. In this case, the bearing material 5 serves as both a stress transmission material and a steel beam support material.

図５の例においても支圧材５として山形鋼を使用しているが、ここでは柱１の対向する側面や天端に支圧材５、５を対にしてボルト９やアンカー等により接合し、支圧材５の支持板５２上に鉄骨梁２の下部フランジ２２を載置することで、特に支圧材５に、鉄骨梁２を柱１に支持させながら、鉄骨梁２の水平状態を調整するための水平調整材としての役割も兼ねさせている。   In the example of FIG. 5, angle steel is used as the bearing member 5, but here, the bearing members 5, 5 are paired to the opposite side surfaces and the top end of the column 1 and joined by bolts 9, anchors, or the like. By placing the lower flange 22 of the steel beam 2 on the support plate 52 of the bearing member 5, the horizontal state of the steel beam 2 can be maintained while the steel beam 2 is supported by the column 1 in particular on the bearing member 5. It also serves as a leveling material for adjustment.

図示するように支持材５を支圧板５１において柱１の側面に固定する場合、ボルト９等が挿通するための支圧板５１の挿通孔が鉛直方向に長孔状に形成されることで、支圧材５の柱１に対する固定高さが調整可能になる。図５は接合部６の下の柱１の天端上に鉄骨梁２が載置される支承体８を設置し、鉄骨梁２を対向する支圧材５、５と支承体８に支持させた場合の様子を示す。   As shown in the figure, when the support member 5 is fixed to the side surface of the column 1 in the bearing plate 51, the insertion hole of the bearing plate 51 through which the bolts 9 and the like are inserted is formed in the shape of a long hole in the vertical direction. The fixed height of the pressure member 5 with respect to the column 1 can be adjusted. In FIG. 5, a support body 8 on which the steel beam 2 is placed is installed on the top end of the column 1 below the joint 6, and the steel beam 2 is supported by the opposing support members 5 and 5 and the support body 8. The situation is shown.

図５に示すように支圧材５を鉄骨梁２の支持材及び水平調整材として使用することで、支圧板５１の応力伝達材としての役割が薄れる場合には、支圧材５はその軸方向（長さ方向）には必ずしも鉄骨梁２の上部フランジ２１と下部フランジ２２の幅に相当する長さを持つ必要はない。支圧材５、５を純粋に支持材及び水平調整材として使用する場合には、図示する支圧材５、５の他に、鉄骨梁２からの応力伝達用の別の支圧材５、５を設置することもある。   As shown in FIG. 5, when the support member 5 is used as a support member and a horizontal adjustment member for the steel beam 2, when the role of the support plate 51 as a stress transmission member is weakened, the support member 5 has its axis. It is not always necessary to have a length corresponding to the width of the upper flange 21 and the lower flange 22 of the steel beam 2 in the direction (length direction). When the bearing members 5 and 5 are used purely as a support member and a horizontal adjustment member, in addition to the bearing members 5 and 5 shown in the figure, another bearing member 5 for transmitting stress from the steel beam 2, 5 may be installed.

１……柱、
２……鉄骨梁、２１……上部フランジ、２２……下部フランジ、２３……ウェブ、２３ａ……挿通孔、
３……柱主筋、４……せん断補強筋、
５……支圧材、５１……支圧板、５２……支持板、
６……接合部、
７……支圧プレート、８……支承体、９……ボルト。
1 ... Pillar,
2 ... Steel beam, 21 ... Upper flange, 22 ... Lower flange, 23 ... Web, 23a ... Insertion hole,
3 …… Column reinforcement, 4 …… Shear reinforcement,
5 …… Supporting material, 51 …… Supporting plate, 52 …… Support plate,
6 …… Junction,
7 ... bearing plate, 8 ... bearing, 9 ... bolt.

Claims (2)

鉄筋コンクリート造の柱と梁との接合部に上部フランジ及び下部フランジを有する鉄骨梁が一方向に貫通した状態で、または端部において埋設された状態で配置され、前記鉄骨梁のフランジを幅方向に挟み込む位置に柱主筋が配筋された柱・梁の接合部において、
前記鉄骨梁の前記上部フランジ上と前記下部フランジ下の少なくともいずれか一方の前記柱主筋の外周側に、前記鉄骨梁の材軸に直交する面をなす支圧板を持つ支圧材が設置され、この支圧材が前記鉄骨梁に、または前記鉄骨梁以外のいずれかの部位に保持された状態で、前記支圧材を含む接合部の領域にコンクリートが打設されていることを特徴とする鉄筋コンクリート柱と鉄骨梁の接合部構造。 A steel beam having an upper flange and a lower flange is pierced in one direction at the joint between a reinforced concrete column and beam, or is embedded in an end portion, and the flange of the steel beam is arranged in the width direction. In the column / beam joint where the column main reinforcement is placed at the sandwiched position,
A bearing member having a bearing plate that forms a surface perpendicular to the material axis of the steel beam is installed on the outer peripheral side of the column main bar on at least one of the upper flange and the lower flange of the steel beam, In the state where this bearing material is held in the steel beam or in any part other than the steel beam, concrete is placed in the region of the joint including the bearing material. Joint structure of reinforced concrete column and steel beam. 前記鉄骨梁の下部フランジの下に配置される前記支圧材は前記鉄骨梁の下に配置される柱に接続され、前記鉄骨梁を支持していることを特徴とする請求項１に記載の鉄筋コンクリート柱と鉄骨梁の接合部構造。   The said bearing material arrange | positioned under the lower flange of the said steel beam is connected to the pillar arrange | positioned under the said steel beam, and supports the said steel beam. Joint structure of reinforced concrete column and steel beam.
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