JP5043768B2 - Column beam structure with semi-rigid joint at beam end - Google Patents

Column beam structure with semi-rigid joint at beam end Download PDF

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JP5043768B2
JP5043768B2 JP2008181478A JP2008181478A JP5043768B2 JP 5043768 B2 JP5043768 B2 JP 5043768B2 JP 2008181478 A JP2008181478 A JP 2008181478A JP 2008181478 A JP2008181478 A JP 2008181478A JP 5043768 B2 JP5043768 B2 JP 5043768B2
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JP2010019017A (en
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信哉 西本
清豪 関
伸之 有山
真一 竹崎
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Taisei Corp
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Description

本発明は、建築物の柱梁構造体に関するものであり、より詳細には、梁断面の一部のみにおいて柱と一体化された柱梁、以下「半剛接合柱梁」と称する、を有することによって地震時等において柱に加わるモーメントを軽減した柱梁構造体に関するものである。   The present invention relates to a column beam structure of a building, and more specifically, has a column beam integrated with a column only in a part of the beam cross section, hereinafter referred to as a “semi-rigid joint column beam”. This relates to a column beam structure that reduces the moment applied to the column during an earthquake.

梁の全断面において柱と接合する、いわゆる剛接合柱梁に対して、梁の両端部をピン支持する接合方式として、プレキャストおよびプレストレストコンクリートに関するＰＣＩデザインハンドブック第６版、２００４年（非特許文献１）には、図１に示す構造が掲載されている。同構造は、梁端部の下端近傍を切り欠いて端部を階段状に形成すると共に、柱１８に支持突起（コーベル）１０を設け、柱の支持突起１０によって梁の階段状の端部の下面１２を支持するものである。支持突起１０と、該支持突起１０によって支持される梁の端部の下面１２との間にはベアリングパッド１４を介在させてもよい。当該構造の場合には、梁１６は、その両端部においてピン支持されているものの、水平荷重の伝達に関する接合部の強度は接触面間の摩擦力またはベアリングパッド１４のせん断強度によって規定されているために、地震時のように大きな水平力が作用する際の水平力の伝達には課題があった。   PCI joint design handbook for precast and prestressed concrete, 6th edition, 2004 as a joint system for pin-supporting both ends of a beam to a so-called rigid joint column beam that joins the column in the entire cross section of the beam (non-patent document 1) ) Shows the structure shown in FIG. In this structure, the vicinity of the lower end of the beam end portion is cut out to form an end portion in a staircase shape, and a support protrusion (corbel) 10 is provided on the column 18. The lower surface 12 is supported. A bearing pad 14 may be interposed between the support protrusion 10 and the lower surface 12 of the end portion of the beam supported by the support protrusion 10. In the case of this structure, the beam 16 is pin-supported at both ends thereof, but the strength of the joint portion related to the transmission of the horizontal load is defined by the frictional force between the contact surfaces or the shear strength of the bearing pad 14. For this reason, there is a problem in the transmission of the horizontal force when a large horizontal force acts as in an earthquake.

特公平５−１４０６１号公報（特許文献１）は、図２に示す柱梁接合を開示するものである。同公報に開示された構造によれば、梁端部の下端近傍を切り欠いて端部を階段状に形成すると共に、柱に支持突起（支承用ブラケット）１０を設け、柱の支持突起１０によって梁１６の階段状の端部２０の下面２２を支持するものである。支持突起１０と、該支持突起１０によって支持される梁の端部２０の下面２２との間にはベースモルタル２４を介在させ、さらに鉄筋２８が支持突起１０と梁の階段状の端部の下面２２を貫通して柱梁を結合している。当該構造の場合には、水平荷重の伝達に関する接合部の強度はベースモルタル２４または鉄筋２８の強度によって規定されているために、地震時のように大きな水平力が作用する際の水平力の伝達に課題がある点は、前出の非特許文献１に記載された構造と同様である。
PCI Design Handbook, 6th Edition, 2004 特公平５−１４０６１号公報 Japanese Examined Patent Publication No. 5-14061 (Patent Document 1) discloses a column beam connection shown in FIG. According to the structure disclosed in the above publication, the vicinity of the lower end of the beam end portion is cut out to form the end portion in a staircase shape, and a support projection (support bracket) 10 is provided on the column. The lower surface 22 of the stepped end 20 of the beam 16 is supported. A base mortar 24 is interposed between the support protrusion 10 and the lower surface 22 of the end portion 20 of the beam supported by the support protrusion 10, and a reinforcing bar 28 is provided on the lower surface of the stepped end portion of the support protrusion 10 and the beam. The column beams are connected through 22. In the case of the structure, since the strength of the joint relating to the transmission of the horizontal load is defined by the strength of the base mortar 24 or the reinforcing bar 28, the transmission of the horizontal force when a large horizontal force acts as in an earthquake. The point which has a subject in is the same as that of the structure described in the nonpatent literature 1 mentioned above.
PCI Design Handbook, 6th Edition, 2004 Japanese Patent Publication No. 5-14061

本発明は、従来技術が有する上記の課題を解決することを目的としたものであって、柱梁接合部をピン接合して柱に作用する曲げモーメントを低減すると同時に、梁から柱に地震力等の水平力を確実に伝達することのできる柱梁構造体を提供することを課題とする。   The present invention aims to solve the above-mentioned problems of the prior art, and reduces the bending moment acting on the column by pin-joining the column beam joint, and at the same time, seismic force from the beam to the column. It is an object of the present invention to provide a column beam structure capable of reliably transmitting a horizontal force such as the above.

上記の目的を達成するために、本発明は、梁せいの一部においてのみ柱と一体化された梁を有する、建築物の柱梁構造体を提案する。具体的には、例えば、側面にブラケットを有する通し柱と、端部断面に段差がある梁とが、その間に隙間を設けて接合された柱梁構造体であって、
前記梁は前記ブラケットの上に変形部材を介して架設されるとともに、断面の一部のみが前記柱側面に接触し、この接触した面を交差する定着材によって一体化されたことを特徴とする柱梁構造体である。 In order to achieve the above object, the present invention proposes a column beam structure of a building having a beam integrated with a column only at a part of the beam. Specifically, for example, a through-column having a bracket on the side surface and a beam having a step in the end cross section, a column beam structure joined with a gap therebetween,
The beam is constructed on the bracket via a deformable member, and only a part of the cross section is in contact with the side surface of the column, and is integrated by a fixing material that intersects the contacted surface. It is a column beam structure.

梁断面の一部においてのみ柱と一体化された梁とは、梁せいの一定の範囲のみが柱と一体的に結合されている状態を指しており、端部を階段状に形成した梁、端部にスリットを形成した梁、端部近傍の断面積を柱との接合部に向かって漸減させた梁等によって実現することができる。一体化されているとは、ここでは、柱梁のコンクリートが一体として形成されており、柱梁接合面を鉄筋が貫通する状態を言う。したがって、前記非特許文献１および特許文献１に記載された構造は、少なくとも梁断面の一部においてのみ柱と一体化された梁には該当しない。前記通し柱と梁との間の隙間は、前記ブラケットの側面と前記梁の断面下部の間にあるのが好ましい。前記接触した面を交差する定着材とは、例えば、柱側面と接触する梁断面を貫通して柱や反対側の梁に定着された梁の主鉄筋または緊張材である。   A beam integrated with a column only in a part of the beam cross section refers to a state in which only a certain range of the beam is integrally coupled with the column, and a beam whose end is formed in a step shape, It can be realized by a beam in which a slit is formed at the end, a beam in which the cross-sectional area in the vicinity of the end is gradually reduced toward the joint with the column, and the like. Here, the term “integrated” refers to a state in which the concrete of the column beam is integrally formed, and the reinforcing bar penetrates the column beam joint surface. Therefore, the structures described in Non-Patent Document 1 and Patent Document 1 do not correspond to a beam integrated with a column only at least in a part of the beam cross section. The gap between the through pillar and the beam is preferably between the side surface of the bracket and the lower cross-section of the beam. The fixing material that intersects the contact surface is, for example, a main reinforcing bar or a tension member of a beam that passes through a cross section of the beam that contacts the column side surface and is fixed to the column or the beam on the opposite side.

本発明に係る柱梁構造体は、さらに、前記柱梁が一体化された部分以外に、柱梁間で鉛直荷重を伝達する支承部材または変形部材を有していても良い。当該支承部材（変形部材）は、梁端部の柱に対する回転を拘束しない（回転に対する剛性が小さい）のが好ましい。たとえば、弾性部材、弾塑性部材などである。このような構造によれば、梁に作用する鉛直荷重を全て梁端部のせん断力で負担する必要がなくなるので、梁の断面設計に余裕が生まれる。前記変形部材は、水平方向に変形可能であるのが好ましい。また、変形部材は、弾性体、粘性体、粘弾性体、摩擦材、滑り材のいずれかで構成されるのが好ましい。   The column beam structure according to the present invention may further include a support member or a deformable member that transmits a vertical load between the column beams, in addition to the portion where the column beams are integrated. It is preferable that the support member (deformation member) does not restrain the rotation of the beam end with respect to the column (the rigidity against rotation is small). For example, it is an elastic member, an elastic-plastic member, or the like. According to such a structure, it is not necessary to bear all the vertical loads acting on the beam by the shearing force at the end of the beam, so that there is a margin in the cross-sectional design of the beam. The deformable member is preferably deformable in the horizontal direction. Moreover, it is preferable that a deformation | transformation member is comprised by either an elastic body, a viscous body, a viscoelastic body, a friction material, and a sliding material.

前記柱梁間で鉛直荷重を伝達する支承部材は、梁側に突出するよう柱に設けられた受け側ブラケットと、梁端部に設けられた掛かり側ブラケットであってもよい。受け側ブラケットは、柱の側面から梁の方向に突出した部位を指し、その形状大きさによらない。掛かり側ブラケットは、階段状に形成された梁端部の先端部近傍を指す。また、本発明に基づく柱梁の接合は、上記のようにブラケットを介したものに限定されず、梁端部の一部が柱に貫入した構造、梁端部は階段状に形成せずに単にスリットを設けただけであって、柱の受け側ブラケットで梁端部を下から支持する構造等を採ることもできる。   The supporting member that transmits the vertical load between the column beams may be a receiving side bracket provided on the column so as to protrude toward the beam side and a hanging side bracket provided on the beam end. The receiving bracket refers to a portion protruding in the direction of the beam from the side surface of the column, and does not depend on the shape size. The hanging bracket refers to the vicinity of the tip of the beam end formed in a staircase shape. In addition, the connection of the column beam according to the present invention is not limited to the one via the bracket as described above, but a structure in which a part of the beam end portion penetrates the column, and the beam end portion is not formed in a step shape. A structure in which the beam end is supported from below by a bracket on the receiving side of the column can also be employed simply by providing a slit.

前記受け側ブラケットと掛かり側ブラケットの間に、鉛直荷重を支持すると共に水平方向の変形を許容する支承部材を介在させてもよい。支承部材が水平方向の変形を許容する場合、梁の鉛直荷重を柱に有効に伝達すると同時に、梁端部の柱に対する回転の拘束力を弱めることができる。当該支承部材としては、すべり支承、粘弾性体、積層ゴム、摩擦材の何れかを使用するのが好ましい。   Between the receiving bracket and the hanging bracket, a support member that supports a vertical load and allows deformation in the horizontal direction may be interposed. When the support member allows deformation in the horizontal direction, the vertical load of the beam can be effectively transmitted to the column, and at the same time, the rotational restraint force on the column at the end of the beam can be weakened. As the bearing member, it is preferable to use any one of a sliding bearing, a viscoelastic body, a laminated rubber, and a friction material.

本発明によった場合、柱に作用する曲げモーメントを低減することができ、柱の断面積を小さくすることができる。例えば、本発明の方法によって柱の面外方向の断面を低減して扁平な形状の柱を採用することで、居室内への出っ張りの無い（あるいは小さな）使いやすい空間を実現することができる。   According to the present invention, the bending moment acting on the column can be reduced, and the cross-sectional area of the column can be reduced. For example, by adopting a flat column by reducing the cross section in the out-of-plane direction of the column by the method of the present invention, it is possible to realize an easy-to-use space without (or small) protruding into the living room.

さらに、梁端部に生じる曲げ抵抗や上記の支承部材を、建物が振動する際の減衰要素として利用することにより、建物の振動性状を改善することも可能である。   Furthermore, it is also possible to improve the vibration characteristics of the building by using the bending resistance generated at the beam end or the above-mentioned support member as a damping element when the building vibrates.

以下に、実施例に基づいて本発明の具体的な態様を説明するが、実施例は発明の理解を助けるために記載するに過ぎないものであるから、本発明は以下に記載する実施例に限定されるものではないことはいうまでも無い。   Specific embodiments of the present invention will be described below on the basis of examples. However, the examples are only described to help the understanding of the invention, and therefore the present invention is not limited to the examples described below. Needless to say, it is not limited.

図３は、本発明に基づく柱梁半剛接合を示す概念図である。
図３に示すように、柱１から突出した受け側ブラケット２に、それと対を成す形状の掛かり側ブラケット４を持つ梁３を載置する。受け側ブラケット２と掛かり側ブラケット４は、鉛直方向の荷重を伝達すると同時に、水平方向には相対的に変位可能である。梁３の上端近傍には、鉄筋等の定着材７が柱梁を貫通して柱１側に定着されている。また、柱１と梁３は、梁３の上端近傍に位置する柱との一体化部８においてのみ一体化されており、他の部分はスリット６によって完全に分離されている。ただし、鉛直荷重の伝達のために、受け側ブラケット２上には支承部材（変形部材）５が載置されて梁３の掛かり側ブラケット４を支持している。 FIG. 3 is a conceptual diagram showing a column beam semi-rigid joint according to the present invention.
As shown in FIG. 3, a beam 3 having a hook-side bracket 4 having a shape paired with the receiving-side bracket 2 protruding from the column 1 is placed. The receiving side bracket 2 and the hanging side bracket 4 transmit a load in the vertical direction and can be relatively displaced in the horizontal direction. In the vicinity of the upper end of the beam 3, a fixing material 7 such as a reinforcing bar penetrates the column beam and is fixed to the column 1 side. Further, the column 1 and the beam 3 are integrated only at an integrated portion 8 with the column located in the vicinity of the upper end of the beam 3, and the other portions are completely separated by the slit 6. However, a support member (deformable member) 5 is placed on the receiving bracket 2 to support the hanging bracket 4 of the beam 3 in order to transmit the vertical load.

梁端部にモーメントが作用した場合、スリット６のクリアランスの範囲内で支承部材５が水平方向に変形することにより、定着材７の定着位置近傍を回転中心として梁端部に回転変形が発生する。梁端部に生じる曲げモーメントは、主として定着材７と支承部材５との鉛直方向距離Ｌと、支承部材５の負担水平力の積となるが、支承部材５に生じる水平力を低く抑えることで梁端部の曲げモーメントを少なくし、結果的に梁と接続する柱１の断面積を低減することが可能になる。   When a moment acts on the beam end, the support member 5 is deformed in the horizontal direction within the clearance of the slit 6, thereby causing rotational deformation at the beam end with the vicinity of the fixing position of the fixing material 7 as the rotation center. . The bending moment generated at the beam end is mainly the product of the vertical distance L between the fixing member 7 and the support member 5 and the horizontal force applied to the support member 5, but the horizontal force generated at the support member 5 is kept low. It is possible to reduce the bending moment at the end of the beam and consequently reduce the cross-sectional area of the column 1 connected to the beam.

一方、梁から柱への水平力の伝達は、梁３と柱１との一体化部８と定着材７に作用する軸力および支承部材５に作用するせん断力によるが、定着材７のみならず一体化部８の断面積を調整することにより、地震力等の水平力の伝達に必要な断面積を確保することができる。支承部材５としては、弾性体のみならず、粘性体、粘弾性体、塑性化部材、摩擦部材、積層ゴム等を用いることができる。   On the other hand, the transmission of the horizontal force from the beam to the column depends on the axial force acting on the integrated portion 8 of the beam 3 and the column 1 and the fixing material 7 and the shearing force acting on the support member 5. By adjusting the cross-sectional area of the integrated portion 8, the cross-sectional area necessary for transmitting horizontal force such as seismic force can be ensured. As the support member 5, not only an elastic body but also a viscous body, a viscoelastic body, a plasticizing member, a friction member, a laminated rubber, or the like can be used.

上記実施例では、梁３に作用する鉛直荷重の支持のために受け側ブラケット２と掛かり側ブラケット４を設けることを前提としたが、荷重条件によっては、ブラケットを設けずに、柱と梁を梁端部の一体化部８のみで一体化し、梁断面の一体化部８以外の部分をスリットによって柱と切り離すことも可能である。この場合、梁断面は、一体化部８へ近づくに従って漸減するものであっても良い。あるいは、一体化部８以外をスリットで切り離すと共に、掛かり側ブラケット４を設けず、梁３の下端を受け側ブラケット２によって支持する構成も可能である。また、受け側ブラケット２は、梁３の、一体化部８の下端を直接支持するものでも良い。   In the above embodiment, it is assumed that the receiving side bracket 2 and the hanging side bracket 4 are provided to support the vertical load acting on the beam 3, but depending on the load condition, the column and the beam may be provided without providing the bracket. It is also possible to integrate only at the beam end integrated portion 8 and to separate a portion other than the beam cross-section integrated portion 8 from the pillar by a slit. In this case, the cross section of the beam may gradually decrease as it approaches the integrated portion 8. Alternatively, a configuration is possible in which a portion other than the integrated portion 8 is separated by a slit, and the hanging bracket 4 is not provided and the lower end of the beam 3 is supported by the receiving bracket 2. The receiving bracket 2 may directly support the lower end of the integrated portion 8 of the beam 3.

梁端部をベアリングパッドで支持した構造の例（従来技術）Example of structure where beam end is supported by bearing pad (conventional technology) 梁端部をブラケットで支持すると共にブラケット間を鉄筋で連結した構造の例（従来技術）Example of structure in which beam ends are supported by brackets and brackets are connected by reinforcing bars (conventional technology) 本発明に基づく柱梁架構の概念図Conceptual diagram of column beam frame based on the present invention

符号の説明Explanation of symbols

１、１８ 柱
２、１０ 受け側ブラケット
３、１６ 梁
４ 掛かり側ブラケット
５ 支承部材
６ スリット
７ 定着材
８ 一体化部
Ｌ 定着材と支承部材との鉛直方向距離 DESCRIPTION OF SYMBOLS 1, 18 Pillar 2, 10 Receiving side brackets 3, 16 Beam 4 Hanging side bracket 5 Support member 6 Slit 7 Fixing material 8 Integrated part L Vertical distance of fixing material and support member

Claims (4)

側面にブラケットを有する通し柱と、端部断面に段差がある梁とが、その間に隙間を設けて接合された柱梁構造体であって、
前記梁は前記ブラケットの上に変形部材を介して架設されるとともに、前記端部の断面の一部のみが前記柱側面に接触し、この接触した面を交差する定着材によって一体化されたことを特徴とする柱梁構造体。 A through-column having a bracket on the side surface and a beam having a step in the end cross section, a column beam structure joined with a gap therebetween,
The beam is installed on the bracket via a deformable member, and only a part of the cross section of the end portion is in contact with the column side surface, and is integrated by a fixing material that intersects the contacted surface. Column beam structure characterized by. 前記変形部材は、水平方向に変形可能であることを特徴とする請求項１に記載の柱梁構造体。   The column beam structure according to claim 1, wherein the deformable member is deformable in a horizontal direction. 前記変形部材は、弾性体、粘性体、粘弾性体、摩擦材、滑り材のいずれかで構成されることを特徴とする請求項１または２に記載の柱梁構造体。   3. The column beam structure according to claim 1, wherein the deformable member is formed of any one of an elastic body, a viscous body, a viscoelastic body, a friction material, and a sliding material. 前記隙間は、前記ブラケットの側面と前記梁の断面下部の間にあることを特徴とする請求項１に記載の柱梁構造体。   The column beam structure according to claim 1, wherein the gap is between a side surface of the bracket and a lower section of the beam.
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CN111335486B (en) * 2020-04-09 2021-07-06 钟建敏 Lateral hinged connecting device for steel truss and frame column

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