JP2006241901A

JP2006241901A - Hinge joint structure of rc structural member

Info

Publication number: JP2006241901A
Application number: JP2005061081A
Authority: JP
Inventors: Kentaro Yoshida; 健太郎吉田; Takeyoshi Hishiki; 剛啓日紫喜; Toshio Ono; 俊夫大野; Goro Sakai; 吾郎坂井; Tomoaki Honda; 智昭本田; Takahiro Arai; 崇裕新井
Original assignee: Kajima Corp
Current assignee: Kajima Corp
Priority date: 2005-03-04
Filing date: 2005-03-04
Publication date: 2006-09-14
Anticipated expiration: 2025-03-04
Also published as: JP4449788B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge joint structure of an RC structural member enabling a connection part between the RC structural members to be made into a very compact connection part having large deformation capacity (energy absorbing capacity). <P>SOLUTION: A protrusion part 3a formed on an upper end of a diagonal member 3 and a recess 5a formed on a diagonal member holder 5 of an upper floor slab 1 are abutted on each other and fitted to each other to form the hinge joint structure. An anchoring fitting 6 on the male side is mounted on the upper end of the diagonal member 3 and a female joint fitting 7 on the female side is mounted on the diagonal member holder 5. The anchoring fitting 6 on the male side is formed of a protruded face part 6a covering a face of the protrusion part 3a and a fixing part 6b fixed in an end part concrete of the diagonal member 3. The female joint fitting 7 is formed of a recessed face part 7a covering a face of the recess 5a and a fixing part 7b fixed in concrete of the diagonal member holder 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、一方のＲＣ構造部材に形成された凸部と他方のＲＣ構造部材に形成された凹部を突き合わせて嵌合させてなるＲＣ構造部材のヒンジ継手構造に関し、例えばＲＣまたはＰＣ箱桁橋梁の上部構造などに適用される。 The present invention relates to a hinge joint structure of an RC structural member formed by abutting and fitting a convex portion formed on one RC structural member and a concave portion formed on the other RC structural member, for example, RC or PC box girder bridge Applied to the superstructure of

例えば、箱桁橋として、箱型断面の鉄筋コンクリート製またはプレストレストコンクリート製のプレキャストコンクリート（以下「ＰＣ」という）ブロックを張出し架設などによって施工し、特に上下の床版とウェブ材とからなる箱桁の重量を軽量化して構造の合理化や施工性の向上を図るため、箱桁のウェブ部分に斜材を設置してトラス構造としたＰＣ箱型橋が知られている（特許文献１）。 For example, as a box girder bridge, a precast concrete (hereinafter referred to as “PC”) block made of reinforced concrete or prestressed concrete with a box-shaped cross section is constructed by overhanging, and in particular, a box girder composed of upper and lower floor slabs and web materials In order to reduce the weight and to rationalize the structure and improve the workability, a PC box bridge having a truss structure by installing diagonal members on the web portion of the box girder is known (Patent Document 1).

ところで、トラス構造は理論上、格点部がピン構造となるため軸力のみを負担するが、複合トラスの場合は格点部が剛結もしくはそれに近い構造となるため、軸力の他に曲げとせん断力も作用する。
特開２００３−１４７７２７号公報特開平１１−２２２８１６号公報特開２０００−１０４２１９号公報 By the way, the truss structure theoretically bears only the axial force because the point part is a pin structure, but in the case of a composite truss, the point part is a rigid connection or a structure close to it, so it is bent in addition to the axial force. And shear force also acts.
JP 2003-147727 A JP-A-11-222816 JP 2000-104219 A

従来、上記したＰＣ箱型橋の場合、斜材と上下床版との格点部は、上記した曲げとせん断力に耐えうる構造とする必要から、断面の大型化、構造の複雑化が免れないという課題があった。また、地震時などの過大な応力によって割裂ひび割れ等が発生し、脆性破壊に至るおそれもあった。 Conventionally, in the case of the above-mentioned PC box type bridge, it is necessary to make the grading portion between the diagonal member and the upper and lower floor slabs to withstand the bending and shearing forces described above, so that an increase in cross section and a complicated structure are avoided. There was no problem. In addition, there was a risk of splitting cracks and the like due to excessive stress during an earthquake or the like, leading to brittle fracture.

本発明は、以上の課題を解決するためになされたもので、変形能力（エネルギーの吸収能力）が大きく、かつ非常にコンパクトなヒンジ継手構造とすることができるＲＣ構造部材のヒンジ継手構造を提供することを目的とする。 The present invention has been made to solve the above problems, and provides a hinge joint structure of an RC structure member that has a large deformation capacity (energy absorption capacity) and can be a very compact hinge joint structure. The purpose is to do.

請求項１記載のＲＣ構造部材のヒンジ継手構造は、一方のＲＣ構造部材に形成された凸部と他方のＲＣ構造部材に形成された凹部を突き合わせて嵌合させてなるＲＣ構造部材のヒンジ継手構造において、前記一方のＲＣ構造部材の凸部には該凸部の表面を覆う凸形表面部と該ＲＣ構造部材のコンクリート中に定着される定着部とからなり、該凸形表面部と定着部とによりこれらの内側のコンクリートを拘束するようにした鋼板製のオス側継手金物が設けられ、前記他方のＲＣ構造部材の凹部には該凹部の表面を覆う凹形表面部と該ＲＣ構造部材のコンクリート中に定着される定着部とからなり、該凹形表面部と定着部とによりこれらの内側のコンクリートを拘束するようにした鋼板製のメス側継手金物が設けられていることを特徴とするものである。 The hinge joint structure for an RC structural member according to claim 1 is a hinge joint for an RC structural member formed by abutting and fitting a convex portion formed on one RC structural member with a concave portion formed on the other RC structural member. In the structure, the convex portion of the one RC structural member includes a convex surface portion covering the surface of the convex portion and a fixing portion fixed in the concrete of the RC structural member. A steel-side male fitting made of steel that restrains the inner concrete by the portion, and a concave surface portion covering the surface of the concave portion and the RC structural member in the concave portion of the other RC structural member Characterized in that a female joint fitting made of a steel plate is provided, which is made of a fixing portion fixed in the concrete of the steel plate, and the inner surface of the concrete is restrained by the concave surface portion and the fixing portion. What to do A.

本発明は特に、ＲＣ構造部材どうしの接合部に作用する曲げモーメントとせん断力を鋼板製の継手金物の変形で吸収することで接合部における曲げモーメント等の応力を緩和するとともに、前記継手金物によるコンクリートの拘束効果によってコンクリート強度を向上させ、接合部における割裂ひび割れ等の発生を未然に防止するようにしたものである。 Especially this invention absorbs the bending moment and shear force which act on the junction part of RC structure members by the deformation | transformation of the joint metal fittings made from a steel plate, and relieves stress, such as a bending moment, in a junction part, and also by the said joint hardware. The concrete strength is improved by the restraining effect of the concrete, and the occurrence of split cracks and the like in the joint is prevented in advance.

この場合のオス側継手金物の形状としては、例えば端部断面が円弧状をなし、側面から見てＵ字状に形成されたもの、あるいは端部が凸曲面状（球面状）のキャップ状に形成されたもの等を考えることができる。一方、メス側継手金物としては、例えば端部断面がオス側継手金物の端部断面に対応した円弧状をなし、ほぼＵ字状に形成されたもの、あるいは端部がオス側継手金物の凸曲面状に対応した凹曲面状をなすキャップ状に形成されたもの等を考えることができる。 As the shape of the male side fitting hardware in this case, for example, the end section has an arc shape and is formed in a U shape when viewed from the side, or the end has a convex curved surface (spherical) cap shape. The formed ones can be considered. On the other hand, as the female side fitting hardware, for example, the end cross section has an arc shape corresponding to the end cross section of the male side fitting hardware and is formed in a substantially U shape, or the end is a convex shape of the male side fitting hardware. A cap formed in a concave shape corresponding to a curved shape can be considered.

請求項２記載のＲＣ構造部材のヒンジ継手構造は、請求項１記載のＲＣ構造部材のヒンジ継手構造において、前記オス側継手金物の定着部および前記メス側継手金物の定着部には多数の小孔が設けられていることを特徴とするものであり、特にコンクリートの付着力を高めて継手金物を一体的に取り付けることができるとともに、継手金物によるコンクリートの拘束効果も高めることができる。 The RC joint member hinge joint structure according to claim 2 is the RC joint member hinge joint structure according to claim 1, wherein the male side joint hardware fixing portion and the female side joint hardware fixing portion include a plurality of small joints. A hole is provided, and in particular, it is possible to integrally attach the joint hardware by increasing the adhesion force of the concrete, and it is also possible to enhance the constraining effect of the concrete by the joint hardware.

請求項３記載のＲＣ構造部材のヒンジ継手構造は、請求項１または２記載のＲＣ構造部材のヒンジ継手構造において、前記オス側継手金物の定着部および前記メス側継手金物の定着部の外側のコンクリート中に、それぞれの定着部を取り囲むようにフープ状の補強筋が配筋されていることを特徴とするものであり、補強筋によるコンクリートの拘束効果によりコンクリートの強度向上を図ることができる。 The hinge joint structure of the RC structural member according to claim 3 is the hinge joint structure of the RC structural member according to claim 1 or 2, wherein the fixing portion of the male side fitting hardware and the fixing portion of the female side fitting hardware are outside of the fixing portion. In the concrete, hoop-shaped reinforcing bars are arranged so as to surround each fixing portion, and the strength of the concrete can be improved by the effect of restraining the concrete by the reinforcing bars.

請求項４記載のＲＣ構造部材のヒンジ継手構造は、請求項１、２または３記載のＲＣ構造部材のヒンジ継手構造において、前記オス側継手金物と前記メス側継手金物の突き合わせ方向に、これらを貫通して、一端が前記一方のＲＣ構造部材に定着され、他端が前記他方のＲＣ構造部材に定着される緊張材が設けられていることを特徴とするものであり、特に引張力を緊張材に負担させることにより、継手金物の設計および製作を簡単にすることができる。なお、この場合の緊張材としては、例えばＰＣ鋼棒やＰＣケーブル等を利用することができる。 The hinge joint structure of the RC structural member according to claim 4 is the hinge joint structure of the RC structural member according to claim 1, 2, or 3, wherein the male side joint hardware and the female side joint hardware are in abutting direction. There is provided a tensioning material that penetrates and has one end fixed to the one RC structural member and the other end fixed to the other RC structural member. By placing the burden on the material, it is possible to simplify the design and manufacture of the joint hardware. In addition, as a tension material in this case, a PC steel rod, a PC cable, etc. can be utilized, for example.

本発明は、ＲＣ構造部材どうしの接合部に作用する曲げモーメントとせん断力を鋼板製の継手金物の変形で吸収することで接合部における曲げモーメント等の応力を緩和することができ、ＲＣ構造部材間の接合部を変形能力（エネルギーの吸収能力）が大きく、かつ非常にコンパクトなヒンジ継手構造とすることができる。 The present invention can relieve stress such as bending moment in the joint by absorbing the bending moment and shearing force acting on the joint between the RC structural members by deformation of the steel fitting made of steel plate. It is possible to provide a hinge joint structure having a large deformation capacity (energy absorption capacity) and a very compact joint portion between them.

また、継手金物によるコンクリートの拘束効果によってコンクリートの強度を向上させることができ、接合部におけるコンクリートの割裂ひび割れ等の発生を未然に防止することができる。 Further, the strength of the concrete can be improved by the effect of restraining the concrete by the joint hardware, and the occurrence of the split crack of the concrete at the joint can be prevented in advance.

図１，２は、複合箱桁の一例を示し、図において、上床版１と下床版２がそれぞれ箱桁軸方向に平行に配置され、この上下の床版１と床版２間の両側ウェブに相当する位置に複数の斜材３が箱桁軸方向に立面視でＸ字状に交差して配置され、かつ各斜材３の上端部と下端部はそれぞれ上床版１と下床版２にヒンジ継手構造によって接合されている。 1 and 2 show an example of a composite box girder. In the figure, an upper floor slab 1 and a lower floor slab 2 are arranged in parallel in the box girder axis direction, and both sides between the upper and lower floor slabs 1 and 2 are shown. A plurality of diagonal members 3 are arranged in an X-shape in an elevational view in the box girder axis direction at positions corresponding to webs, and the upper and lower ends of each diagonal member 3 are the upper floor slab 1 and the lower floor, respectively. The plate 2 is joined by a hinge joint structure.

上床版１と下床版２は共に、複数の床版ブロック４を箱桁軸方向に互いに接合しながら配置することにより形成され、各床版ブロック４は高強度コンクリートまたは短繊維補強コンクリートからなる版状のＰＣ部材から形成されている。また、斜材３も床版ブロック４と同様に、高強度コンクリート、短繊維補強コンクリート、またはＦＲＰ等からなるＰＣ部材から形成されている。 Both the upper floor slab 1 and the lower floor slab 2 are formed by arranging a plurality of floor slab blocks 4 while being joined to each other in the box girder axis direction, and each floor slab block 4 is made of high-strength concrete or short fiber reinforced concrete. It is formed from a plate-shaped PC member. The diagonal member 3 is also formed of a PC member made of high-strength concrete, short fiber reinforced concrete, FRP, or the like, like the floor slab block 4.

図１(ｃ)と図２は特に、各斜材３と上床版１との接合部を示し、図示するように、斜材３の上端部に形成された凸部３ａと上床版１の斜材受け５に形成された凹部５ａが突き合わさって嵌合し、ヒンジ継手構造が形成されている。 FIG. 1 (c) and FIG. 2 particularly show the joints between the diagonal members 3 and the upper floor slab 1, and as shown in the drawing, the convex portions 3 a formed on the upper end of the diagonal member 3 and the diagonal portions of the upper floor slab 1. A recess 5a formed in the material receiver 5 is abutted and fitted to form a hinge joint structure.

斜材３の上端部にはオス側継手金物６が取り付けられ、斜材受け５にはメス側継手金物７が取り付けられている。 A male joint fitting 6 is attached to the upper end of the diagonal member 3, and a female joint fitting 7 is attached to the diagonal member receiver 5.

オス側継手金物６は、凸部３ａの表面を覆う凸形表面部６ａと斜材３の端部コンクリート中に定着された定着部６ｂとから形成され、かつ凸形表面部６ａと定着部６ｂとによりこれらの内側のコンクリートを拘束するように斜材３の上端部に取り付けられている。 The male joint fitting 6 is formed of a convex surface portion 6a covering the surface of the convex portion 3a and a fixing portion 6b fixed in the end concrete of the diagonal member 3, and the convex surface portion 6a and the fixing portion 6b. And are attached to the upper end of the diagonal member 3 so as to constrain the inner concrete.

一方、メス側継手金物７は、凹部５ａの表面を覆う凹形表面部７ａと斜材受け５のコンクリート中に定着される定着部７ｂとから形成され、凹形表面部７ａと定着部７ｂとによりこれらの内側のコンクリートを拘束するように斜材受け５に取り付けられている。 On the other hand, the female joint fitting 7 is formed of a concave surface portion 7a that covers the surface of the concave portion 5a and a fixing portion 7b that is fixed in the concrete of the diagonal member receiver 5, and the concave surface portion 7a and the fixing portion 7b. Is attached to the diagonal support 5 so as to restrain the concrete inside.

すなわち、オス側継手金物６とメス側継手金物７は、共に薄鋼板から側面視でＵ字状に形成され、さらにオス側継手金物６は円弧状に形成された凸形表面部６ａを斜材３の凸部３ａに被せ、かつ板状に延びる定着部６ｂ，６ｂが斜材３の端部コンクリート内に埋設して定着されている。 That is, both the male side joint metal 6 and the female side joint metal 7 are formed in a U shape in a side view from a thin steel plate, and the male side joint metal 6 has a convex surface portion 6a formed in an arc shape as an oblique material. Fixing portions 6b and 6b covering the three convex portions 3a and extending in a plate shape are embedded and fixed in the end concrete of the diagonal member 3.

一方、メス側継手金物７はオス側継手金物６の凸形表面部６ａに対応して形成された凹形表面部７ａを斜材受け５の凹部５ａに被せ、かつ板状に延びる定着部７ｂ，７ｂが斜材受け部５のコンクリート内に埋設して定着されている。 On the other hand, the female joint fitting 7 covers the concave surface portion 7a formed corresponding to the convex surface portion 6a of the male joint fitting 6 over the concave portion 5a of the diagonal member 5 and extends in a plate shape. 7b are buried and fixed in the concrete of the diagonal member receiving portion 5.

また、オス側継手金物６の定着部６ｂ，６ｂとメス側継手金物７の定着部７ｂ，７ｂには、それぞれ複数の小孔６ｃと７ｃが形成され、さらにその周囲に補強筋９として複数のフープ筋またはスパイラル筋が配筋されている。 In addition, a plurality of small holes 6c and 7c are formed in the fixing portions 6b and 6b of the male joint fitting 6 and the fixing portions 7b and 7b of the female joint fitting 7, respectively. Hoop or spiral muscles are arranged.

さらに、オス側継手金物６とメス側継手金物７の突き合わせ方向に、緊張鋼材８が挿通され、かつその一端側８ａは斜材３側のコンクリート内に定着され、他端側８ｂは斜材受け５側のコンクリート内に定着されている。なお、特に図示しないが、各斜材３の下端部と下床版２との接合部も同様のヒンジ継手構造によって接合されている。 Further, a tension steel material 8 is inserted in the abutting direction of the male joint fitting 6 and the female joint fitting 7, and one end side 8a thereof is fixed in the concrete on the diagonal member 3 side, and the other end side 8b is received by the diagonal member. It is fixed in the concrete on the 5th side. Although not particularly illustrated, the joint portion between the lower end portion of each diagonal member 3 and the lower floor slab 2 is also joined by a similar hinge joint structure.

本発明は、ＲＣ構造部材間の接合部を変形能力（エネルギーの吸収能力）が大きく、かつ非常にコンパクトなヒンジ継手構造とすることができる。 According to the present invention, the joint portion between the RC structural members can be a hinge joint structure having a large deformation capability (energy absorption capability) and a very compact size.

本発明の複合箱桁を示し、(ａ)は箱桁の軸直角方向から見た立面図、(ｂ)は箱桁の軸方向から見た立面図、（ｃ）は（ａ）におけるイ部拡大断面図である。The composite box girder of the present invention is shown, (a) is an elevation view as seen from the direction perpendicular to the axis of the box girder, (b) is an elevation view as seen from the axis direction of the box girder, and (c) is in (a). FIG. 各斜材の上端部と上床版との接合部を示す図１(ａ)におけるイ部分解拡大斜視図である。FIG. 2 is an exploded exploded perspective view of a portion in FIG.

Explanation of symbols

１上床版（他方のＲＣ構造部材）
２下床版
３斜材（一方のＲＣ構造部材）
４床版ブロック
５斜材受け
６オス側継手金物
７メス側継手金物
８緊張鋼材（緊張材）
９補強筋 1 Upper floor slab (the other RC structural member)
2 Lower floor slab 3 Diagonal material (one RC structural member)
4 Floor slab block 5 Diagonal material receptacle 6 Male joint fitting 7 Female joint fitting 8 Tensile steel (tensile material)
9 Reinforcing bars

Claims

In the hinge joint structure of an RC structural member formed by abutting and fitting a convex portion formed on one RC structural member with a concave portion formed on the other RC structural member, the convex portion of the one RC structural member Consists of a convex surface portion covering the surface of the convex portion and a fixing portion fixed in the concrete of the RC structural member, and the inner surface of the concrete is restrained by the convex surface portion and the fixing portion. A male side joint metal fitting made of steel plate is provided, and the concave portion of the other RC structural member comprises a concave surface portion covering the surface of the concave portion and a fixing portion fixed in the concrete of the RC structural member, A hinge joint structure for an RC structure member, characterized in that a female-side joint metal fitting made of steel plate is provided so that the inner concrete is restrained by a concave surface portion and a fixing portion.

The hinge joint structure for an RC structure member according to claim 1, wherein a plurality of small holes are provided in the fixing portion of the male side fitting hardware and the fixing portion of the female side fitting hardware.

A hoop-shaped reinforcing bar is arranged in the concrete outside the fixing portion of the male side fitting hardware and the fixing portion of the female side fitting hardware so as to surround each fixing portion. The hinge joint structure of RC structure member of 1 or 2.

There is a tension material penetrating through the male joint fitting and the female joint fitting in the abutting direction, with one end fixed to the one RC structural member and the other end fixed to the other RC structural member. The RC joint member hinge joint structure according to claim 1, wherein the hinge joint structure is provided.