JP2012036705A - Joint structure of crossed portion of steel plate deck rib, and bridge - Google Patents

Joint structure of crossed portion of steel plate deck rib, and bridge Download PDF

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JP2012036705A
JP2012036705A JP2010180522A JP2010180522A JP2012036705A JP 2012036705 A JP2012036705 A JP 2012036705A JP 2010180522 A JP2010180522 A JP 2010180522A JP 2010180522 A JP2010180522 A JP 2010180522A JP 2012036705 A JP2012036705 A JP 2012036705A
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rib
steel
bridge
vertical
joint structure
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JP5378324B2 (en
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Takashi Yamauchi
誉史 山内
Toshimitsu Suzuki
俊光 鈴木
Shunzo Oka
俊蔵 岡
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MM Bridge Co Ltd
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Mitsubishi Heavy Industries Bridge and Steel Structures Engineering Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To reduce the number of man-hours for manufacture and to prevent a crack from being formed in a lateral rib and a steel plate deck in such a manner as to start from an end of a portion welded to a longitudinal rib.SOLUTION: A steel plate deck 10 includes a floor slab 1 made of a steel material, a longitudinal rib 2 made of a steel material provided along a bridge axis direction on the undersurface of the floor slab 1, and a lateral rib 3 made of a steel material provided along a width direction orthogonal to the bridge axis direction on the undersurface of the floor slab 1. In a joint structure of a crossed portion of steel plate deck ribs, the mutually-crossed longitudinal and lateral ribs 2 and 3 of the steel plate deck 10 are joined to each other. The joint structure of the crossed portion of the steel plate deck ribs comprises a notched portion 31 which is provided in the lateral rib 3 in such a manner that the longitudinal rib 2 is inserted thereinto in a noncontact state, and a connecting member 5 which is made of a steel material for connecting the longitudinal and lateral ribs 2 and 3 together in the state of straddling the notched portion 31 together, by tightening a high-strength bolt G.

Description

本発明は、鋼床版における縦リブと横リブとの交差部を接合する接合構造、および当該接合構造が適用された橋梁に適用する。   The present invention is applied to a joining structure that joins the intersections of vertical ribs and horizontal ribs in a steel deck and a bridge to which the joining structure is applied.

橋梁は、床板の下面に、橋軸方向に沿って縦リブが溶接接合されていると共に、橋軸方向に直交する幅方向に沿って横リブが溶接接合された鋼床版を備えている。そして、一般の鋼床版は、縦リブと横リブとの交差部について、縦リブを通すために横リブに設けられた切り込みの一側縁と、縦リブの一側面とが溶接により接合されている。   The bridge includes a steel floor slab in which longitudinal ribs are welded and joined along the bridge axis direction to the lower surface of the floor plate, and transverse ribs are welded and joined along the width direction perpendicular to the bridge axis direction. In the general steel deck, one side edge of the notch provided in the horizontal rib and one side surface of the vertical rib are joined by welding at the intersection of the vertical rib and the horizontal rib. ing.

上述した縦リブと横リブとの交差部の接合においては、床板への車重の負荷により発生する応力によって、縦リブとの溶接部の端部を起点として横リブおよび鋼床版に亀裂が生じている。そこで、従来では、その補修として、ボルトの締結による連結部材を介して縦リブと横リブとを接合している（例えば、特許文献１および特許文献２参照）。   In the joining of the intersection of the vertical rib and the horizontal rib described above, the horizontal rib and the steel slab are cracked from the end of the welded portion with the vertical rib due to the stress generated by the load of the vehicle weight on the floor plate. Has occurred. Therefore, conventionally, as a repair, the vertical rib and the horizontal rib are joined via a connecting member by fastening a bolt (for example, see Patent Document 1 and Patent Document 2).

特開２００７−１０７１８５号公報JP 2007-107185 A 特開２００８−２３１７１９号公報JP 2008-231719 A

上述した従来の補修によれば、縦リブと横リブとをボルトの締結による連結部材を介して接合することで、横リブにおける発生応力を低減することが可能である。しかし、これでは、縦リブと横リブとの溶接部を残したままであることから、依然として、横リブにおける発生応力は存在し、縦リブとの溶接部の端部を起点として横リブおよび鋼床版に亀裂が生じる事態を防ぐことは難しい。また、従来の接合構造を新設橋梁に適用した場合には、狭隘な縦リブと横リブを溶接にて接合するため、疲労耐久性に優れた品質を確保するためには製作工数がかかる。   According to the conventional repair described above, it is possible to reduce the generated stress in the horizontal rib by joining the vertical rib and the horizontal rib via the connecting member by fastening the bolt. However, in this case, since the welded portion between the vertical rib and the horizontal rib remains, the stress generated in the horizontal rib still exists, and the horizontal rib and the steel floor start from the end of the welded portion with the vertical rib. It is difficult to prevent the plate from cracking. In addition, when the conventional joint structure is applied to a newly-built bridge, since narrow vertical ribs and horizontal ribs are joined by welding, it takes a lot of manufacturing steps to ensure quality with excellent fatigue durability.

本発明は上述した課題を解決するものであり、製作工数を低減すると共に、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することのできる鋼床版リブ交差部接合構造および橋梁を提供することを目的とする。   The present invention solves the above-described problems, and can reduce the number of manufacturing steps and prevent the occurrence of cracks in the lateral ribs and the steel slab starting from the end of the welded portion with the longitudinal ribs. An object of the present invention is to provide a steel floor slab crossing joint structure and a bridge.

上述の目的を達成するために、本発明の鋼床版リブ交差部接合構造は、鋼材からなる床板と、前記床板の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブと、前記床板の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブとを備えた鋼床版について、互いに交差する前記縦リブと前記横リブとを接合する鋼床版リブ交差部接合構造において、前記縦リブを非接触で挿通する態様で前記横リブに設けられた切欠部と、前記切欠部を跨いだ状態で高力ボルトの締結により前記縦リブと前記横リブとを連結する鋼材からなる連結部材と、を備えることを特徴とする。   In order to achieve the above-mentioned object, the steel floor slab rib crossing joint structure of the present invention includes a floor plate made of steel, and a vertical rib made of steel provided along the bridge axis direction on the lower surface of the floor plate, Steel floor slab comprising a horizontal rib made of steel material provided along the width direction orthogonal to the bridge axis direction on the lower surface of the floor plate, a steel floor for joining the vertical rib and the horizontal rib intersecting each other In the plate rib intersection joint structure, the vertical rib and the horizontal rib are connected to each other by a notch provided in the horizontal rib in a manner that the vertical rib is inserted in a non-contact manner and a high-strength bolt fastened across the notch. And a connecting member made of steel that connects the ribs.

この鋼床版リブ交差部接合構造によれば、縦リブと横リブとを接合する溶接部が存在せず、縦リブと横リブとの相互が高力ボルトの締結により連結部材で接合されているため、従来溶接部に生じていた応力が生じない。この結果、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することができる。しかも、縦リブと横リブとを溶接により接合しないので橋梁新設時の製作工数を低減することができる。   According to this steel deck slab crossing joint structure, there is no welded part that joins the longitudinal rib and the transverse rib, and the longitudinal rib and the transverse rib are joined together by a connecting member by fastening a high-strength bolt. Therefore, the stress that has conventionally occurred in the welded portion does not occur. As a result, it is possible to prevent the occurrence of cracks in the horizontal rib and the steel slab starting from the end of the welded portion with the vertical rib. In addition, since the vertical ribs and the horizontal ribs are not joined by welding, it is possible to reduce the number of manufacturing steps when a bridge is newly installed.

また、本発明の鋼床版リブ交差部接合構造は、前記縦リブを間に挟んで前記連結部材を設けることを特徴とする。   Moreover, the steel deck slab crossing joint structure of the present invention is characterized in that the connecting member is provided with the vertical rib interposed therebetween.

この鋼床版リブ交差部接合構造によれば、縦リブの両側において連結部材を介して横リブと接合することにより、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することができ、かつ縦リブと横リブとの接合の剛性を向上することができる。   According to this steel plate slab rib crossing joint structure, the horizontal rib and the steel slab starting from the end of the welded portion with the vertical rib by joining the horizontal rib via the connecting member on both sides of the vertical rib. It is possible to prevent the occurrence of cracks and improve the rigidity of the joining between the vertical ribs and the horizontal ribs.

また、本発明の鋼床版リブ交差部接合構造は、前記縦リブが、球平形鋼または平板リブであることを特徴とする。   Moreover, the steel deck slab crossing joint structure according to the present invention is characterized in that the longitudinal rib is a spherical flat steel or a flat plate rib.

この鋼床版リブ交差部接合構造によれば、球平形鋼は、球形部分により延在方向に交差する方向に強度を有し、一部が板状に形成されている。また、平板リブは、全体が板状に形成されている。このため、連結部材を介した横リブとの接合において適しており、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止する効果を顕著に得ることができる。しかも、球平形鋼および平板リブは、板状に形成されているため、縦リブを間に挟んで連結部材を設けることに適しており、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止する効果を顕著に得ると共に、縦リブと横リブとの接合の剛性を向上する効果を顕著に得ることができる。   According to this steel deck slab crossing joint structure, the spherical flat steel has strength in a direction intersecting the extending direction by the spherical portion, and a part thereof is formed in a plate shape. The flat plate rib is entirely formed in a plate shape. For this reason, it is suitable for joining with the transverse rib via the connecting member, and the effect of preventing the occurrence of cracks in the transverse rib and the steel slab starting from the end of the welded portion with the longitudinal rib is remarkably obtained. be able to. Moreover, since the spherical flat steel and the flat plate rib are formed in a plate shape, it is suitable for providing a connecting member with the vertical rib interposed therebetween, and the horizontal portion starting from the end of the welded portion with the vertical rib. The effect of preventing the occurrence of cracks in the ribs and the steel slab can be remarkably obtained, and the effect of improving the rigidity of joining of the vertical ribs and the horizontal ribs can be remarkably obtained.

上述の目的を達成するために、本発明の橋梁は、鋼材からなる床板と、前記床板の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブと、前記床板の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブとからなる鋼床版を備えた橋梁において、互いに交差する前記縦リブと前記横リブとの接合に、上述したいずれか一つに記載の接合構造を適用したことを特徴とする。   In order to achieve the above object, a bridge according to the present invention includes a floor plate made of steel, a vertical rib made of steel provided along the axis of the bridge on the lower surface of the floor plate, and a bridge on the lower surface of the floor plate. In a bridge having a steel floor slab made of a steel rib provided along a width direction orthogonal to the axial direction, any one of the above-mentioned joints between the vertical rib and the horizontal rib intersecting each other. The joint structure described in the above is applied.

この橋梁によれば、新設時の製作工数を低減すると共に、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することができ、かつ鋼床版の耐久性を向上することができる。この結果、橋梁としての耐久性を向上することができる。   According to this bridge, it is possible to reduce the manufacturing man-hours at the time of new construction, to prevent the occurrence of cracks in the horizontal ribs and the steel slab starting from the end of the welded portion with the vertical ribs, and the steel floor. The durability of the plate can be improved. As a result, durability as a bridge can be improved.

本発明によれば、製作工数を低減すると共に、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することができる。   According to the present invention, it is possible to reduce the number of manufacturing steps and to prevent the occurrence of cracks in the lateral rib and the steel slab starting from the end of the welded portion with the longitudinal rib.

図１は、本発明の実施の形態に係る橋梁の斜視図である。FIG. 1 is a perspective view of a bridge according to an embodiment of the present invention. 図２は、本発明の実施の形態に係る接合構造の正面図である。FIG. 2 is a front view of the joint structure according to the embodiment of the present invention. 図３は、本発明の実施の形態に係る接合構造の斜視図である。FIG. 3 is a perspective view of the joint structure according to the embodiment of the present invention. 図４は、本発明の実施の形態に係る接合構造の斜視図である。FIG. 4 is a perspective view of the joint structure according to the embodiment of the present invention. 図５は、本発明の実施例に係る解析対象を示す概略図である。FIG. 5 is a schematic diagram illustrating an analysis target according to the embodiment of the present invention. 図６は、本発明の実施例に係る解析結果を示す図である。FIG. 6 is a diagram illustrating an analysis result according to the embodiment of the present invention.

以下に、本発明に係る実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。また、下記実施の形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。   Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

図１は、本実施の形態に係る橋梁の斜視図であり、図２は、本実施の形態に係る接合構造の正面図であり、図３および図４は、本実施の形態に係る接合構造の斜視図である。   FIG. 1 is a perspective view of a bridge according to the present embodiment, FIG. 2 is a front view of the joint structure according to the present embodiment, and FIGS. 3 and 4 are joint structures according to the present embodiment. FIG.

図１および図２に示すように、本実施の形態の橋梁は、鋼材からなるもので、床板１と、床板１の下面にて橋軸方向（橋梁の長手方向）に沿って設けられた縦リブ２と、床板１の下面にて橋軸方向に直交する幅方向に沿って設けられた横リブ３とを備えた鋼床版１０を有している。   As shown in FIG. 1 and FIG. 2, the bridge of the present embodiment is made of steel, and is provided with a floor plate 1 and a longitudinal axis provided along the bridge axis direction (longitudinal direction of the bridge) on the lower surface of the floor plate 1. It has a steel slab 10 provided with ribs 2 and lateral ribs 3 provided along the width direction orthogonal to the bridge axis direction on the lower surface of the floor board 1.

床板１は、橋梁の橋軸方向に連続すると共に、幅方向の全域に渡り設けられた鋼板であり、車両などが走行する橋梁の床面を構成するものである。床板１の上面には、車両などの走行面として舗装などが敷設される。   The floor plate 1 is a steel plate that is continuous in the bridge axis direction of the bridge and is provided over the entire region in the width direction, and constitutes the floor surface of the bridge on which a vehicle or the like travels. On the upper surface of the floor board 1, a pavement or the like is laid as a traveling surface of a vehicle or the like.

縦リブ２は、床板１の下面に上端が溶接Ｗにより接合され、橋軸方向に延在すると共に、幅方向で所定間隔をおいて複数並設されている。縦リブ２は、形鋼または鋼板で構成され、本実施の形態では、下端に球状の膨出部を有する形鋼としての球平形鋼、または鋼板としての平板リブとして構成されている。   The upper ends of the vertical ribs 2 are joined to the lower surface of the floor board 1 by welding W, extend in the bridge axis direction, and are arranged in parallel at predetermined intervals in the width direction. The vertical rib 2 is configured by a shape steel or a steel plate. In the present embodiment, the vertical rib 2 is configured as a spherical flat steel as a shape steel having a spherical bulge at the lower end, or a flat plate rib as a steel plate.

横リブ３は、床板１の下面に上端が溶接Ｗにより接合され、幅方向のほぼ全域に延在すると共に、橋軸方向で所定間隔をおいて複数並設されている。横リブ３は、鋼板で構成され、本実施の形態では、下端にフランジを有するＴ形鋼として構成されている。   The horizontal ribs 3 are joined to the lower surface of the floor plate 1 by welding W, extend substantially over the entire width direction, and are arranged in parallel at predetermined intervals in the bridge axis direction. The lateral rib 3 is composed of a steel plate, and in the present embodiment, it is composed of a T-shaped steel having a flange at the lower end.

縦リブ２と横リブ３とは、それぞれが延在する橋軸方向と幅方向とで互いに交差して設けられている。かかる交差部においては、横リブ３に、縦リブ２を非接触で挿通する切欠部３１が形成され、この切欠部３１に縦リブ２を通すことで縦リブ２と横リブ３とが互いに交差する。   The vertical rib 2 and the horizontal rib 3 are provided so as to intersect with each other in the bridge axis direction and the width direction in which each extends. In such an intersecting portion, a cutout portion 31 is formed in the horizontal rib 3 so as to pass through the vertical rib 2 in a non-contact manner, and the vertical rib 2 and the horizontal rib 3 cross each other by passing the vertical rib 2 through the cutout portion 31. To do.

また、図１に示すように、鋼床版１０は、桁部材４が設けられている。桁部材４は、本実施の形態では箱桁として構成され、溶接による接合やボルトによる締結で箱状に組み付けられている。桁部材４は、横リブ３に接合されると共に、橋軸方向に延在して設けられ、各横リブ３を介して床板１を支持する。この桁部材４は、図には明示しないが、地面に立設された架台（橋脚）上に載置される。また、図示しないが、桁部材４は、鈑桁として構成されていてもよい。   Further, as shown in FIG. 1, the steel deck 10 is provided with a girder member 4. The girder member 4 is configured as a box girder in this embodiment, and is assembled in a box shape by welding or fastening with bolts. The girder member 4 is joined to the lateral rib 3 and is provided so as to extend in the bridge axis direction, and supports the floor board 1 through the lateral rib 3. The girder member 4 is placed on a gantry (bridge pier) standing on the ground, although not shown in the figure. Although not shown, the girder member 4 may be configured as a girder.

このような橋梁について、本実施の形態の鋼床版１０のリブ交差部接合構造は、上述したように、横リブ３に、縦リブ２を非接触で挿通する切欠部３１が形成されている。そして、図２〜図４に示すように、切欠部３１を跨いだ状態で高力ボルトＧの締結により縦リブ２と横リブ３とが連結部材５を介して連結されている。連結部材５は、鋼材からなるＬ字形状のプレートであり、Ｌ字形状に折り曲げられた一片５１が縦リブ２の鉛直面に添いつつ高力ボルトＧにより縦リブ２に締結され、他辺５２が横リブ３の鉛直面に添いつつ高力ボルトＧにより横リブ３に締結されている。   For such a bridge, in the rib intersection joint structure of the steel deck 10 according to the present embodiment, as described above, the notch 31 for inserting the vertical rib 2 in a non-contact manner is formed in the horizontal rib 3. . As shown in FIGS. 2 to 4, the vertical rib 2 and the horizontal rib 3 are connected via the connecting member 5 by fastening the high-strength bolt G in a state of straddling the notch 31. The connecting member 5 is an L-shaped plate made of a steel material, and a piece 51 bent into an L-shape is fastened to the vertical rib 2 by a high-strength bolt G while adhering to the vertical surface of the vertical rib 2, and the other side 52. Is fastened to the horizontal rib 3 by a high-strength bolt G while following the vertical surface of the horizontal rib 3.

また、連結部材５は、縦リブ２を間に挟んで設けられている。すなわち、縦リブ２の両側の鉛直面に一対の連結部材５の一片５１が添って、各一片５１および間の縦リブ２が高力ボルトＧで締結されている。なお、図には明示しないが、連結部材５は、横リブ３の両側に配置され、計４つで縦リブ２と横リブ３とを締結するように設けられていてもよい。   Further, the connecting member 5 is provided with the vertical rib 2 interposed therebetween. That is, the pieces 51 of the pair of connecting members 5 are attached to the vertical surfaces on both sides of the vertical rib 2, and each piece 51 and the vertical rib 2 between them are fastened by the high-strength bolt G. Although not clearly shown in the drawing, the connecting members 5 may be provided on both sides of the horizontal rib 3 so as to fasten the vertical ribs 2 and the horizontal ribs 3 in total.

また、高力ボルトＧは、所定トルク以上でボルト先端が破断するトルシア形高力ボルトが好ましい。トルシア形高力ボルトは、ボルト先端の破断により締め付けトルクが決まるので、所定の締め付けトルクで締結を行うことが可能である。   The high-strength bolt G is preferably a torcia-type high-strength bolt that breaks the bolt tip at a predetermined torque or more. Since the tightening torque of the torcia-type high strength bolt is determined by the breakage of the bolt tip, it can be fastened with a predetermined tightening torque.

このように、本実施の形態の鋼床版リブ交差部接合構造は、鋼材からなる床板１と、床板１の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブ２と、床板１の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブ３とを備えた鋼床版１０について、互いに交差する縦リブ２と横リブ３とを接合する鋼床版リブ交差部接合構造において、縦リブ２を非接触で挿通する態様で横リブ３に設けられた切欠部３１と、切欠部３１を跨いだ状態で高力ボルトＧの締結により縦リブ２と横リブ３とを連結する鋼材からなる連結部材５とを備える。   Thus, the steel floor slab rib crossing joint structure of the present embodiment includes a floor plate 1 made of steel, vertical ribs 2 made of steel provided along the bridge axis direction on the lower surface of the floor plate 1, and a floor plate. Steel for joining a vertical rib 2 and a horizontal rib 3 intersecting each other with respect to a steel deck 10 provided with a horizontal rib 3 made of a steel material provided along the width direction orthogonal to the bridge axis direction on the lower surface of 1. In the floor slab rib intersection joint structure, the vertical rib 2 is formed by fastening the high-strength bolt G across the notch 31 and the notch 31 provided in the horizontal rib 3 in a manner that the vertical rib 2 is inserted in a non-contact manner. And a connecting member 5 made of a steel material for connecting the lateral ribs 3.

この鋼床版リブ交差部接合構造は、切欠部３１により縦リブ２と横リブ３とが非接触で交差して設けられている。すなわち、縦リブ２と横リブ３とが従来のように溶接により接合されていない。しかも、縦リブ２と横リブ３とは、切欠部３１を跨いだ状態で高力ボルトＧの締結により連結部材５によって接合されている。このため、床板１上を車両などが走行する際、車重が床板１に負荷され、横リブ３を介して縦リブ２に伝わることになり、横リブ３には、繰り返しせん断応力が生じる。また、車重の負荷が縦リブ２直上から床板１に負荷された場合は、車重が縦リブ２を介して横リブ３に伝わることがある。しかし、この鋼床版リブ交差部接合構造によれば、縦リブ２と横リブ３とが従来のように溶接により接合されておらず、相互が高力ボルトの締結により連結部材５で接合されているため、従来のように縦リブ２と横リブ３との溶接部に応力が生じない。この結果、縦リブ２との溶接部の端部を起点とした横リブ３および鋼床版１０の床板１への亀裂の発生を防止することが可能になる。そして、鋼床版１０の耐久性を向上することが可能になる。しかも、縦リブ２と横リブ３とを溶接により接合しないので製作工数を低減することが可能になる。   In this steel plate slab rib intersection joining structure, the longitudinal rib 2 and the transverse rib 3 intersect with each other by the notch 31 so as not to contact each other. That is, the vertical rib 2 and the horizontal rib 3 are not joined by welding as in the conventional case. Moreover, the vertical rib 2 and the horizontal rib 3 are joined by the connecting member 5 by fastening the high-strength bolt G in a state of straddling the notch 31. For this reason, when a vehicle or the like travels on the floor board 1, the vehicle weight is loaded on the floor board 1 and is transmitted to the vertical rib 2 via the horizontal rib 3, and shear stress is repeatedly generated in the horizontal rib 3. Further, when the load of the vehicle weight is applied to the floor plate 1 from directly above the vertical rib 2, the vehicle weight may be transmitted to the horizontal rib 3 through the vertical rib 2. However, according to this steel slab rib crossing joint structure, the longitudinal rib 2 and the transverse rib 3 are not joined together by welding as in the prior art, and the two are joined by the connecting member 5 by fastening high-strength bolts. Therefore, no stress is generated in the welded portion between the vertical rib 2 and the horizontal rib 3 as in the prior art. As a result, it becomes possible to prevent the occurrence of cracks in the horizontal rib 3 and the floor plate 1 of the steel deck 10 starting from the end of the welded portion with the vertical rib 2. And it becomes possible to improve the durability of the steel deck 10. In addition, since the vertical ribs 2 and the horizontal ribs 3 are not joined by welding, the number of manufacturing steps can be reduced.

また、本実施の形態の鋼床版リブ交差部接合構造は、縦リブ２を間に挟んで連結部材５を設ける。   Further, in the steel floor slab rib crossing joint structure of the present embodiment, the connecting member 5 is provided with the vertical rib 2 interposed therebetween.

この鋼床版リブ交差部接合構造によれば、縦リブ２の両側の鉛直面において連結部材５を介して横リブ３と接合することにより、縦リブ２との溶接部の端部を起点とした横リブ３および鋼床版１０の床板１への亀裂の発生を防止することが可能になり、かつ縦リブ２と横リブ３との接合の剛性をより向上することが可能になる。   According to this steel plate slab rib crossing joint structure, the end of the welded portion with the vertical rib 2 is the starting point by joining the horizontal rib 3 via the connecting member 5 on the vertical surfaces on both sides of the vertical rib 2. It is possible to prevent the occurrence of cracks in the floor plate 1 of the horizontal rib 3 and the steel slab 10, and to further improve the rigidity of the joining between the vertical rib 2 and the horizontal rib 3.

また、本実施の形態の鋼床版リブ交差部接合構造は、縦リブ２が、球平形鋼または平板リブである。   Further, in the steel deck slab crossing joint structure of the present embodiment, the vertical rib 2 is a spherical flat steel or a flat plate rib.

球平形鋼は、球形部分により延在方向に交差する方向に強度を有し、一部が板状に形成されている。また、平板リブは、全体が板状に形成されている。このため、連結部材５を介した横リブ３との接合において適しており、縦リブ２との溶接部の端部を起点とした横リブ３および鋼床版１０の床板１への亀裂の発生を防止する効果を顕著に得ることが可能になる。しかも、球平形鋼および平板リブは、板状に形成されているため、縦リブ２を間に挟んで連結部材５を設けることに適しており、縦リブ２との溶接部の端部を起点とした横リブ３および鋼床版１０の床板１への亀裂の発生を防止する効果を顕著に得ると共に、縦リブ２と横リブ３との接合の剛性をより向上する効果を顕著に得ることが可能になる。   Spherical flat steel has strength in a direction intersecting the extending direction by a spherical portion, and a part thereof is formed in a plate shape. The flat plate rib is entirely formed in a plate shape. For this reason, it is suitable for joining with the lateral rib 3 via the connecting member 5, and cracks are generated in the lateral rib 3 and the floor plate 1 of the steel deck 10 starting from the end of the welded portion with the longitudinal rib 2. It is possible to obtain a remarkable effect of preventing the above. Moreover, since the spherical flat steel and the flat plate rib are formed in a plate shape, they are suitable for providing the connecting member 5 with the vertical rib 2 interposed therebetween, and start from the end of the welded portion with the vertical rib 2. The effect of preventing the occurrence of cracks in the floor plate 1 of the horizontal rib 3 and the steel slab 10 is remarkably obtained, and the effect of further improving the rigidity of the joining of the vertical rib 2 and the horizontal rib 3 is obtained. Is possible.

本実施の形態の橋梁は、鋼材からなる床板１と、床板１の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブ２と、床板１の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブ３とからなる鋼床版１０を備えた橋梁において、互いに交差する縦リブ２と横リブ３との接合に、上述した接合構造を適用している。   The bridge according to the present embodiment includes a floor plate 1 made of steel, vertical ribs 2 made of steel provided along the bridge axis direction on the lower surface of the floor plate 1, and orthogonal to the bridge axis direction on the lower surface of the floor plate 1. In the bridge provided with the steel floor slab 10 made of the steel ribs 3 provided along the width direction, the joining structure described above is applied to the joining of the longitudinal ribs 2 and the transverse ribs 3 intersecting each other. Yes.

この橋梁によれば、縦リブ２との溶接部の端部を起点とした横リブ３および鋼床版１０の床板１への亀裂の発生を防止することが可能になる。そして、鋼床版１０の耐久性を向上することが可能になる。この結果、橋梁としての耐久性を向上することが可能になる。   According to this bridge, it is possible to prevent cracks from occurring in the horizontal rib 3 and the floor plate 1 of the steel deck 10 starting from the end of the welded portion with the vertical rib 2. And it becomes possible to improve the durability of the steel deck 10. As a result, durability as a bridge can be improved.

なお、上述した実施の形態の鋼床版リブ交差部接合構造および橋梁は、新規に施工する橋梁にかかり適用されることが好ましいが、既設の橋梁において、縦リブ２と横リブ３との溶接を切除して連結部材５を高力ボルトＧで締結する補修を行うことも可能である。   In addition, it is preferable that the steel floor slab rib crossing joint structure and the bridge according to the embodiment described above are applied to a newly constructed bridge. However, in the existing bridge, welding between the longitudinal rib 2 and the lateral rib 3 is preferable. It is also possible to repair by fastening the connecting member 5 with the high-strength bolts G.

本実施例では、鋼床版リブ交差部接合構造についてＦＥＭ解析によりミーゼス応力による評価が行われた（図５および図６参照）。なお、本来、疲労耐久性を厳密に評価するためには、実験を実施することが好ましいが、従来例との疲労耐久性に対する相対的な比較は、ＦＥＭ解析によるミーゼス応力評価で行えると判断した。   In the present Example, evaluation by Mises stress was performed by FEM analysis about the steel floor slab rib crossing junction structure (refer FIG. 5 and FIG. 6). In addition, in order to strictly evaluate fatigue durability, it is preferable to conduct an experiment. However, it was determined that a relative comparison with the conventional example of fatigue durability can be performed by Mises stress evaluation by FEM analysis. .

解析モデルについて、従来例１は、図５（ａ）に示すように、横リブ３に設けた切り込みの一側と縦リブ２の一側面とを溶接により接合したものである。また、従来例２は、図５（ａ）に示すように、横リブ３に設けた切り込みの一側と縦リブ２の一側面とを溶接により接合したものに、縦リブ２と横リブ３とを連結する部材を設けたもので、特許文献１または特許文献２に相当する。一方、実施例は、図５（ｂ）に示すように、横リブ３に切欠部３１を設けて縦リブ２と非接触とし、かつ縦リブ２を間に挟んで連結部材（図示せず）を設けたものである。また、縦リブ２は、従来例１，２および実施例ともに、幅方向に左から８個設けてある。   As for the analysis model, Conventional Example 1 is obtained by welding one side of the cut provided in the horizontal rib 3 and one side surface of the vertical rib 2 as shown in FIG. 5A. Further, as shown in FIG. 5 (a), the conventional example 2 includes a longitudinal rib 2 and a lateral rib 3 which are joined to each other by welding one side of a cut provided in the lateral rib 3 and one side surface of the longitudinal rib 2. And is equivalent to Patent Document 1 or Patent Document 2. On the other hand, in the embodiment, as shown in FIG. 5B, a cutout portion 31 is provided in the horizontal rib 3 so as not to be in contact with the vertical rib 2, and a connecting member (not shown) with the vertical rib 2 interposed therebetween. Is provided. Moreover, eight vertical ribs 2 are provided from the left in the width direction in both of the conventional examples 1 and 2 and the examples.

解析においては、左から４番目の縦リブ２と５番目の縦リブ２との間、および左から５番目の縦リブ２と６番目の縦リブ２との間において、床板１に１組の車輪の荷重相当の５０ｋＮ×２を載荷した。また、ミーゼス応力の応力算出点は、床板１と横リブ３（切り込み開口端または切欠部３１ａ開口端）との溶接部における端部であるａ〜ｈとした。   In the analysis, a set of floor plates 1 is provided between the fourth vertical rib 2 and the fifth vertical rib 2 from the left and between the fifth vertical rib 2 and the sixth vertical rib 2 from the left. 50 kN × 2 equivalent to the wheel load was loaded. Moreover, the stress calculation point of Mises stress was made into ah which is the edge part in the welding part of the floor board 1 and the horizontal rib 3 (cut opening end or notch part 31a opening end).

この解析の結果、図６に示すように、相対比較をすると、本実施例は、全体として応力算出点での応力が低く、疲労耐久性が向上していることが評価でき、溶接部の端部を起点とした横リブ３への亀裂の発生を防止できることが分かる。   As a result of this analysis, as shown in FIG. 6, when a relative comparison is made, it can be evaluated that the present example has a low stress at the stress calculation point as a whole, and the fatigue durability is improved. It can be seen that the occurrence of cracks in the lateral rib 3 starting from the portion can be prevented.

以上のように、本発明に係る鋼床版リブ交差部接合構造および橋梁は、製作工数を低減すると共に、縦リブとの溶接部の端部を起点とした横リブおよび鋼床版への亀裂の発生を防止することに適している。   As described above, the steel plate slab rib crossing joint structure and the bridge according to the present invention reduce the number of manufacturing steps and cracks in the horizontal rib and the steel slab starting from the end of the welded portion with the vertical rib. Suitable for preventing the occurrence of

１ 床板
２ 縦リブ
３ 横リブ
３１ 切欠部
４ 桁部材
５ 連結部材
５１ 一片
５２ 他辺
１０ 鋼床版
Ｇ 高力ボルト
Ｗ 溶接 DESCRIPTION OF SYMBOLS 1 Floor board 2 Vertical rib 3 Horizontal rib 31 Notch part 4 Girder member 5 Connection member 51 One piece 52 Other side 10 Steel floor slab G High strength bolt W Welding

Claims (4)

鋼材からなる床板と、前記床板の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブと、前記床板の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブとを備えた鋼床版について、互いに交差する前記縦リブと前記横リブとを接合する鋼床版リブ交差部接合構造において、
前記縦リブを非接触で挿通する態様で前記横リブに設けられた切欠部と、
前記切欠部を跨いだ状態で高力ボルトの締結により前記縦リブと前記横リブとを連結する鋼材からなる連結部材と、
を備えることを特徴とする鋼床版リブ交差部接合構造。 From a floor plate made of steel, a vertical rib made of steel provided along the bridge axis direction on the lower surface of the floor plate, and a steel material provided along the width direction orthogonal to the bridge axis direction on the lower surface of the floor plate In the steel floor slab rib intersection joint structure that joins the longitudinal rib and the transverse rib that intersect each other,
A notch provided in the horizontal rib in a manner of inserting the vertical rib without contact;
A connecting member made of a steel material that connects the vertical rib and the horizontal rib by fastening a high-strength bolt in a state of straddling the notch,
A steel floor slab rib crossing joint structure comprising: 前記縦リブを間に挟んで前記連結部材を設けることを特徴とする請求項１に記載の鋼床版リブ交差部接合構造。   The steel floor slab rib crossing joint structure according to claim 1, wherein the connecting member is provided with the vertical rib interposed therebetween. 前記縦リブが、球平形鋼または平板リブであることを特徴とする請求項１または２に記載の鋼床版リブ交差部接合構造。   The steel plate slab rib crossing joint structure according to claim 1, wherein the vertical rib is a spherical flat steel or a flat plate rib. 鋼材からなる床板と、前記床板の下面にて橋軸方向に沿って設けられた鋼材からなる縦リブと、前記床板の下面にて橋軸方向に直交する幅方向に沿って設けられた鋼材からなる横リブとからなる鋼床版を備えた橋梁において、
互いに交差する前記縦リブと前記横リブとの接合に、請求項１〜３のいずれか一つに記載の接合構造を適用したことを特徴とする橋梁。 From a floor plate made of steel, a vertical rib made of steel provided along the bridge axis direction on the lower surface of the floor plate, and a steel material provided along the width direction orthogonal to the bridge axis direction on the lower surface of the floor plate In a bridge with a steel deck consisting of horizontal ribs
A bridge, wherein the joining structure according to any one of claims 1 to 3 is applied to joining the longitudinal rib and the transverse rib intersecting each other.
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Publication number Priority date Publication date Assignee Title
CN104389265A (en) * 2014-05-14 2015-03-04 中铁二院工程集团有限责任公司 Buckle plate type track expansion adjusting structure of medium-low speed magnetic levitation transportation system
CN112982192A (en) * 2021-02-26 2021-06-18 中冶南方城市建设工程技术有限公司 Flexible steel node is widened to old bridge convenient to installation is changed

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JP2007211416A (en) * 2006-02-07 2007-08-23 Kawada Industries Inc Reinforcing member for steel floor slab, and reinforcing structure
JP2008231719A (en) * 2007-03-19 2008-10-02 Hanshin Expressway Co Ltd Reinforcing method for steel floor slab
JP2008280758A (en) * 2007-05-10 2008-11-20 Nippon Steel Corp Steel floor slab and method of manufacturing floor slab

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Publication number Priority date Publication date Assignee Title
JP2007211416A (en) * 2006-02-07 2007-08-23 Kawada Industries Inc Reinforcing member for steel floor slab, and reinforcing structure
JP2008231719A (en) * 2007-03-19 2008-10-02 Hanshin Expressway Co Ltd Reinforcing method for steel floor slab
JP2008280758A (en) * 2007-05-10 2008-11-20 Nippon Steel Corp Steel floor slab and method of manufacturing floor slab

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104389265A (en) * 2014-05-14 2015-03-04 中铁二院工程集团有限责任公司 Buckle plate type track expansion adjusting structure of medium-low speed magnetic levitation transportation system
CN112982192A (en) * 2021-02-26 2021-06-18 中冶南方城市建设工程技术有限公司 Flexible steel node is widened to old bridge convenient to installation is changed

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