JP4005464B2

JP4005464B2 - Connecting structure of floor slab and girder

Info

Publication number: JP4005464B2
Application number: JP2002279461A
Authority: JP
Inventors: 進吾山口; 心平大隅; 和志渡辺
Original assignee: Sumikei Nikkei Engineering Co Ltd
Current assignee: Nippon Engineering Co Ltd
Priority date: 2002-09-25
Filing date: 2002-09-25
Publication date: 2007-11-07
Anticipated expiration: 2022-09-25
Also published as: JP2004116076A

Description

【０００１】
【発明の属する技術分野】
本発明は、一般道路橋や歩道橋などの橋梁における床版と桁の結合構造に関するものである。
【０００２】
【従来の技術】
主桁に箱桁を使用する箱桁構造の橋梁では、箱桁とその上に配設する床版とを結合することになるが、この結合構造として従来は、例えば図９に示すように箱桁の側から立ち上がるウェブ１３を、床版の側のフランジ１２の下面に直角に突き合わせ、この突き合わせ箇所を隅肉溶接１４により結合しており、溶接箇所はウェブ１３の外側と内側の２か所となる。
【０００３】
前記従来技術は、当業者間で一般的に行われているものであり、文献公知発明に係るものではない。
【０００４】
なお、出願人は、先に、橋梁の床版として使用するデッキパネルとして、幅方向に複数が接合されて、上面両側に長手方向にそってフランジを一体に設けたアルミニウム合金の中空押出形材と、摩擦攪拌接合法による接合によりフランジの下方に形成される空所に適宜間隔で複数配置される補剛材と、前記中空押出形材の下部および前記補剛材の下部を一体に覆い、内側にデッキパネル支持部への固定用のナットを取り付けた摩擦攪拌接合法により接合される複数の裏面板とで構成するものを提案している（例えば、特許文献１参照。）。
【０００５】
また、出願人は、別件として、アルミニウム合金の中空押出形材の複数を長手方向および幅方向に溶接してデッキパネルを形成するデッキにおいて、前記中空押出形材の上面両側に長手方向にそってフランジを一体に設け、隣接する中空押出形材の前記フランジの先端縁を長手方向にそって突き合わせ、この突き合わせ部を連続的に摩擦攪拌接合法により接合しデッキパネルを形成するデッキを提案している（例えば、特許文献２参照。）。
【０００６】
【特許文献１】
特開２００１−８１７２２号公報
【０００７】
【特許文献２】
特開２００１−８１７２３号公報
【０００８】
【発明が解決しようとする課題】
箱桁構造の橋梁の場合、前記ウェブ１３とフランジ１２とを溶接する作業は、ウェブ１３の内側箇所のものは箱桁に内部に作業員が入ってのものとなるが、箱桁が小型のときは、溶接作業が困難で作業性がよくない。また、曲げによる大なる剪断力が生じる箇所に隅肉溶接を施すことになる。
【０００９】
また、特許文献１、２に記載のものは、箱桁構造の橋梁に実施されるものではなく、ボックス形状の桁に対して有効な接合手段が開示されるものではない。
【００１０】
本発明の目的は前記従来例の不都合を解消し、箱桁構造の橋梁の場合、箱桁と床版との結合作業を容易にでき作業性の向上を図ることができ、また、曲げによる大なる剪断力が生じる箇所に隅肉溶接を行わずにすみ強度増加を図れる床版と桁の結合構造を提供することにある。
【００１１】
【課題を解決すするための手段】
本発明は前記目的を達成するため、第１に、桁に床版を結合する橋梁において、桁をアルミニウム合金の中空押出形材または板材による箱桁とし、床版をアルミニウム合金の中空押出形材の複数を長手方向および幅方向に摩擦攪拌接合または溶融溶接して形成したデッキパネルで構成し、前記床版の端縁に、箱桁との結合部材となるコーナー形材を設け、該コーナー形材を介して床版と箱桁とを結合することを要旨とするものである。
【００１２】
第２に、コーナー形材は床版に一体に形成されること、第３に、コーナー形材は床版に接合するフランジ部と箱桁に接合するウェブ部とから構成されるＬ字形またはＴ字形に形成されることを要旨とするものである。
【００１３】
第４に、コーナー形材と床版および箱桁との接合は、高力ボルト摩擦接合や溶融接合などの剛接合によることを要旨とするものである。
【００１４】
請求項１記載の本発明によれば、床版の側に箱桁との結合部材となるコーナー形材を予め設けておくことにより、このコーナー形材を箱桁に機械的接合または溶接接合すれば、床版を箱桁に簡単に接合できる。そして、箱桁が特に小さい場合は、機械的接合を用いることにより箱桁内部での複雑な溶接作業を行わずにすむ。
【００１５】
請求項２記載の本発明によれば、前記作用に加えて、床版は押出形材で形成するから、この床版の押出成形の際にコーナー形材を床版に一体に形成することが可能で、コーナー形材を簡単に形成でき、床版とウェブ部が一体となり完全な接合状態となる。
【００１６】
請求項３記載の本発明によれば、前記作用に加えて、コーナー形材をフランジ部とウェブ部とから構成されるＬ字形またはＴ字形に形成することで、床版や箱桁への接合を容易にできる。
【００１７】
請求項４記載の本発明によれば、前記作用に加えて、コーナー形材と床版および箱桁との接合を剛接合とすることにより、床版と桁との合成桁作用が期待できる。
【００１８】
【発明の実施の形態】
以下、図面について本発明の実施の形態を詳細に説明する。図１は本発明の床版と桁の結合構造の実施形態を示す縦断正面図で、まず、図８について本発明の結合構造が実施される橋梁の構造を説明する。
【００１９】
本発明が実施される橋梁は、箱桁構造であり、アルミニウム合金による押出形材または板材による箱桁１を主桁とし、この箱桁１の上に床版２としてデッキパネルを配設するものである。箱桁１は長さ方向にそって適宜間隔で補強のためのダイヤフラム６を設けてあり、図示の例では床板を含まないものとしてボックス形状に形成した。
【００２０】
この床版２となるデッキパネルは、アルミニウム合金の中空押出形材３をエレメントとして、その複数を長手方向および幅方向に摩擦攪拌接合または溶融溶接して形成したもので、アルミニウム合金としては例えば熱処理合金系の６０００系、５０００系合金を使用する。
【００２１】
前記中空押出形材３は、長手方向にそって両側にフランジ３ａをを突出させた上面板３ｂと、該上面板３ｂと平行で上面板３ｂより幅狭の下面板３ｃと、該上面板３ｂと下面板３ｃとを接続する側面板３ｄとで構成して中空部３ｅを断面逆台形状に形成した。
【００２２】
デッキパネルを作製するに際し、中空押出形材３を横方向に接合するには、中空押出形材３の上面両側に長手方向にそって突出しているフランジ３ａを、隣接する中空押出形材３同士で長手方向にそって突き合わせ、この突き合わせ部を連続的に摩擦攪拌接合法または溶融溶接で接合しデッキパネルを形成する。
【００２３】
摩擦攪拌接合法は、例えば、加工物（本実施形態では中空押出形材３）よりも実質的に硬い材質からなるツールを加工物の接合部に挿入し、挿入したツールを回転させながら移動させることにより接合線方向の溶接を行うようにした接合方法、すなわち、回転ツールと加工物との間に生じる摩擦熱による塑性流動を利用して摩擦接合するものである。
【００２４】
この摩擦攪拌接合法は、接合部材を固定した状態でツールを回転させながら移動することにより接合することができるので、接合方向に対してその長手方向に連続的に固相接合することが可能である。そして、回転ツールと接合部材との摩擦熱による金属の塑性流動を利用した固相接合のため、接合部を溶融させることなく接合できるという特徴があり、加熱温度が低いため、接合後の変形が少ないということや、接合部は溶融されないため、欠陥が少ないという利点があり、押出形材の接合に適している。
【００２５】
本発明は前記のようにして製作したデッキパネルを床版２として箱桁１の上に接合する場合、床版２を構成する中空押出形材３と箱桁１と直接接合するのではなく、結合部材となるコーナー形材４を介して接合する。このコーナー形材４はデッキパネルの端縁に位置する中空押出形材３に接合されるもので、種々の形状が考えられるが、第１例としては、Ｌ字形に形成する。
【００２６】
これは、箱桁構造の橋梁が１ボックス形状の場合に適用されるものとして、図１、図３に示す例ではフランジ部４ａとウェブ部４ｂとが一体となった単純なＬ字形に形成し、該コーナー形材４は中空押出形材３と一体に押出成形し、または、別体として押出成形したものを溶融溶接などにより中空押出形材３の端縁にフランジ部４ａを接合する。
【００２７】
図１の場合は、このコーナー形材４のウェブ部４ｂを通常の溶融溶接により箱桁１の端部に接合する。この場合、箱桁１の側には接合箇所の近傍のダイヤフラム６に接合作業が行いやすいよう切欠き７を予め設けておく。図中５は裏当て材を示す。
【００２８】
図３は高力ボルト摩擦接合やリベット接合によるもので、コーナー形材４のウェブ部４ｂをボルトやリベットなどの止め具８で箱桁１の端部に接合する。
【００２９】
ウェブ部４ｂと箱桁１の裏側には当て板１５を配設するが、この当て板１５の構造は図３に示すような平板状だもよいが、図４（ａ）に示すように止め具８の挿着溝１５ａを形成したものや、図４（ａ）に示すように袋溝１５ｂを形成したものを使用することもでき、この場合は、止め具８の取付位置がわかりやすく、また正確な位置に固定でき作業性かよくなる。
【００３０】
図２は、コーナー形材４を箱桁１に接合する場合で、ウェブ部４ｂの先端を内側に向けてクの字形に折り曲げ、この折り曲げ部９を箱桁１の端部の内側に重ねて当接し、この重合部を溶融溶接などにより接合する。この場合も、コーナー形材４は中空押出形材３と一体に押出成形し、または、別体として押出成形したものを溶融溶接などにより中空押出形材３の端縁にフランジ部４ａを接合することにより、中空押出形材３に設けておく。
【００３１】
図５は、コーナー形材４を箱桁１に機械的に接合する場合で、ウェブ部４ｂの先端に水平方向に突出する接合片１０を一体に形成しておくとともに、箱桁１の側にもこの接合片１０に当接する接合片１１を一体に形成しておき、両接合片１０、１１を重ねて、この重合部を高力ボルトやリベットなどの止め具８で結合する。
【００３２】
図６は、箱桁構造の橋梁が多ボックス形状の場合に適用されるもので、間隔をおいて平行して配置される箱桁１、１の間にも床版２を配設する場合、コーナー形材４は、箱桁１と床版２だけでなく、床版２同士も接合する必要があり、コーナー形材４は全体をＴ字形に形成し、ウェブ部４ｂから両側にフランジ部４ａを突出させた。
【００３３】
これにより、複数の床版２同士をコーナー形材４のフランジ部４ａで相互に接合し、ウェブ部４ｂを箱桁１に接合すれば、多ボックス形状の箱桁構造の橋梁に対しても、床版２を容易に箱桁１に接合できる。接合の手段は前記と同様に機械的接合、溶接接合いずれの手段も使用可能である。
【００３４】
さらにコーナー形材４と床版２との接合形態によっては、図７（ａ）に示すようにフランジ部４ａの形成部位を段違いにしたり、図７（ｂ）に示すようにウェブ部４ｂをフランジ部４ａより上方に突出させることもできる。
【００３５】
【発明の効果】
以上述べたように本発明の床版と桁の結合構造は、床版に一体に形成した、またはこれに設けたコーナー形材を介して、箱桁を機械的接合または溶接接合により結合するから、結合作業が容易で作業性が向上する。また、特に小さい箱桁の場合は、機械的接合を用いることで箱桁内部での複雑な接合作業を行わずにすむ。
【００３６】
さらに、床版と桁との結合は、高力ボルト摩擦接合、リベット接合、溶接接合などの剛接合を用いたから、床版と桁との合成桁作用が期待できる。
【図面の簡単な説明】
【図１】本発明の床版と桁の結合構造の実施形態を示す溶接接合の第１例の縦断正面図である。
【図２】本発明の床版と桁の結合構造の実施形態を示す溶接接合の第２例の縦断正面図である。
【図３】本発明の床版と桁の結合構造の実施形態を示す機械的接合の第１例の縦断正面図である。
【図４】本発明の床版と桁の結合構造の実施形態を示す機械的接合の第１例の当て板を他の形状とした場合の縦断正面図である。
【図５】本発明の床版と桁の結合構造の実施形態を示す機械的接合の第２例の縦断正面図である。
【図６】本発明の床版と桁の結合構造の実施形態を示す多ボックスの箱桁構造に実施した場合の縦断正面図である。
【図７】本発明の床版と桁の結合構造の実施形態を示すコーナー形材の他の例の縦断正面図である。
【図８】箱桁構造の橋梁の説明図である。
【図９】従来の床版と桁の結合構造を示す正面図である。
【符号の説明】
１…箱桁２…床版
３…中空押出形材３ａ…フランジ
３ｂ…上面板３ｃ…下面板
３ｄ…側面板３ｅ…中空部
４…コーナー形材４ａ…フランジ部
４ｂ…ウェブ部５…裏当て材
６…ダイヤフラム７…切欠き
８…止め具９…折り曲げ部
１０、１１…接合片１２…フランジ
１３…ウェブ１４…隅肉溶接
１５…当て板１５ａ…挿着溝
１５ｂ…袋溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combined structure of a floor slab and a girder in a bridge such as a general road bridge or a footbridge.
[0002]
[Prior art]
In a bridge with a box girder structure that uses a box girder as a main girder, the box girder and a floor slab arranged on the box girder are coupled. Conventionally, for example, as shown in FIG. The web 13 rising from the side of the spar is butted at right angles to the lower surface of the flange 12 on the floor slab side, and the butted portions are joined by fillet welds 14. It becomes.
[0003]
The prior art is generally performed by those skilled in the art, and does not relate to a known literature invention.
[0004]
In addition, the applicant previously made an aluminum alloy hollow extruded shape in which a plurality of deck panels were joined in the width direction as a deck panel used as a bridge slab, and flanges were integrally provided along the longitudinal direction on both sides of the upper surface. A plurality of stiffeners arranged at appropriate intervals in a space formed below the flange by joining by friction stir welding, and integrally covering the lower part of the hollow extruded profile and the lower part of the stiffener, A configuration is proposed in which a plurality of back plates are joined by a friction stir welding method in which nuts for fixing to a deck panel support portion are attached inside (see, for example, Patent Document 1).
[0005]
In addition, the applicant, as another matter, in a deck that forms a deck panel by welding a plurality of aluminum alloy hollow extruded sections in the longitudinal direction and the width direction, along the longitudinal direction on both sides of the upper surface of the hollow extruded section. Proposing a deck in which a flange is integrally formed, the end edges of the flanges of adjacent hollow extruded profiles are butted along the longitudinal direction, and the butted portions are continuously joined by friction stir welding to form a deck panel (For example, refer to Patent Document 2).
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-81722
[Patent Document 2]
JP 2001-81723 A
[Problems to be solved by the invention]
In the case of a bridge with a box girder structure, the work for welding the web 13 and the flange 12 is that the inside part of the web 13 has a worker in the box girder, but the box girder is small. Sometimes, welding work is difficult and workability is not good. Further, fillet welding is performed at a location where a large shearing force is generated by bending.
[0009]
Moreover, the thing of patent document 1, 2 is not implemented to the bridge of a box girder structure, and the joining means effective with respect to a box-shaped girder is not disclosed.
[0010]
The object of the present invention is to eliminate the inconvenience of the conventional example, and in the case of a bridge with a box girder structure, the work of connecting the box girder and the floor slab can be facilitated and the workability can be improved. An object of the present invention is to provide a connecting structure of a floor slab and a girder that can increase the corner strength without performing fillet welding at a location where a shearing force is generated.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, first, in a bridge connecting a floor slab to a girder, the girder is made of an aluminum alloy hollow extruded shape or a box girder made of a plate, and the floor slab is made of an aluminum alloy hollow extruded shape. A deck panel formed by friction stir welding or fusion welding in the longitudinal direction and the width direction, and provided with a corner shape member serving as a connecting member with a box girder at the edge of the floor slab. The gist is to connect the floor slab and the box girder through the material.
[0012]
Second, the corner shape is formed integrally with the floor slab, and third, the corner shape is an L-shape or T composed of a flange portion joined to the floor slab and a web portion joined to the box girder. The gist is that it is formed into a letter shape.
[0013]
Fourthly, the corner shape member and the floor slab and box girder are joined by rigid joining such as high-strength bolt friction joining or fusion joining.
[0014]
According to the first aspect of the present invention, by providing in advance a corner shape member to be a connecting member with the box girder on the floor slab side, the corner shape member is mechanically joined or welded to the box girder. For example, the floor slab can be easily joined to the box girder. And when a box girder is especially small, it is not necessary to perform the complicated welding operation inside a box girder by using mechanical joining.
[0015]
According to the second aspect of the present invention, in addition to the above action, the floor slab is formed of an extruded shape. Therefore, when the floor slab is extruded, the corner shape can be formed integrally with the floor slab. It is possible to easily form the corner shape material, and the floor slab and the web portion are integrated to form a complete joined state.
[0016]
According to the third aspect of the present invention, in addition to the above action, the corner shape member is formed into an L shape or a T shape composed of a flange portion and a web portion, thereby joining to a floor slab or a box girder. Can be easily done.
[0017]
According to the fourth aspect of the present invention, in addition to the above-described operation, a combined girder operation of the floor slab and the girder can be expected by rigidly joining the corner shape member to the floor slab and the box girder.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal front view showing an embodiment of a connecting structure of a floor slab and a girder according to the present invention. First, the structure of a bridge in which the connecting structure of the present invention is implemented will be described with reference to FIG.
[0019]
The bridge in which the present invention is implemented has a box girder structure, in which a main girder is an extruded shape member made of aluminum alloy or a plate member, and a deck panel is disposed on the box girder 1 as a floor slab 2. It is. The box girder 1 is provided with a diaphragm 6 for reinforcement at appropriate intervals along the length direction. In the illustrated example, the box girder 1 is formed in a box shape so as not to include a floor board.
[0020]
The deck panel to be the floor slab 2 is formed by friction stir welding or fusion welding of a plurality of aluminum extruded hollow extruded members 3 in the longitudinal and width directions as an element. Alloy-based 6000 series and 5000 series alloys are used.
[0021]
The hollow extruded shape member 3 includes an upper surface plate 3b having flanges 3a protruding on both sides along the longitudinal direction, a lower surface plate 3c parallel to the upper surface plate 3b and narrower than the upper surface plate 3b, and the upper surface plate 3b. And the side plate 3d connecting the lower plate 3c and the hollow portion 3e is formed in an inverted trapezoidal shape.
[0022]
When manufacturing the deck panel, in order to join the hollow extruded profiles 3 in the lateral direction, flanges 3a projecting along the longitudinal direction on both sides of the upper surface of the hollow extruded profiles 3 are connected to each other. And abutting along the longitudinal direction, and the abutting portion is continuously joined by a friction stir welding method or fusion welding to form a deck panel.
[0023]
In the friction stir welding method, for example, a tool made of a material that is substantially harder than a workpiece (in this embodiment, a hollow extruded shape 3) is inserted into the joint of the workpiece, and the inserted tool is moved while rotating. Thus, the welding is performed in the joining line direction, that is, the friction welding is performed using the plastic flow caused by the frictional heat generated between the rotary tool and the workpiece.
[0024]
This friction stir welding method can be joined by rotating the tool while the joining member is fixed, so that solid-phase joining can be continuously performed in the longitudinal direction with respect to the joining direction. is there. And, because of the solid-phase bonding using the plastic flow of metal due to frictional heat between the rotating tool and the bonding member, there is a feature that the bonding portion can be bonded without melting, and since the heating temperature is low, the deformation after bonding is Since there are few and a junction part is not fuse | melted, there exists an advantage that there are few defects, and it is suitable for joining of an extruded profile.
[0025]
In the present invention, when the deck panel manufactured as described above is joined to the box girder 1 as the floor slab 2, it is not directly joined to the hollow extruded shape member 3 constituting the floor slab 2 and the box girder 1, It joins via the corner shape member 4 used as a coupling member. The corner shape member 4 is joined to the hollow extruded shape member 3 positioned at the edge of the deck panel, and various shapes are conceivable. As a first example, the corner shape member 4 is formed in an L shape.
[0026]
This is applied when the bridge of box girder structure is one box shape, and in the example shown in FIGS. 1 and 3, it is formed in a simple L shape in which the flange portion 4a and the web portion 4b are integrated. The corner shape member 4 is integrally formed with the hollow extruded shape member 3 or is extruded separately, and the flange portion 4a is joined to the edge of the hollow extruded shape member 3 by fusion welding or the like.
[0027]
For Figure 1, joined to the end portion of the more box girder 1 the web portion 4b of the corner frame members 4 in conventional melt welding. In this case, a notch 7 is provided in advance on the side of the box girder 1 so that the diaphragm 6 in the vicinity of the joining portion can be easily joined. In the figure, 5 indicates a backing material.
[0028]
FIG. 3 shows high strength bolt frictional joining or rivet joining. The web portion 4b of the corner shape member 4 is joined to the end of the box girder 1 with a stopper 8 such as a bolt or rivet.
[0029]
Although the backing plate 15 is disposed on the back side of the web portion 4b and the box girder 1, the structure of the backing plate 15 may be a flat plate as shown in FIG. 3, but is stopped as shown in FIG. What formed the insertion groove 15a of the tool 8 or what formed the bag groove 15b as shown in FIG. 4A can also be used. In this case, the mounting position of the stopper 8 is easy to understand, In addition, it can be fixed at an accurate position, improving workability.
[0030]
FIG. 2 shows a case in which the corner shape member 4 is joined to the box girder 1, and the web portion 4 b is bent in a U shape with the tip of the web portion 4 b facing inward, and the bent portion 9 is overlapped inside the end portion of the box girder 1. The abutted portions are joined by fusion welding or the like. Also in this case, the corner shape member 4 is extruded integrally with the hollow extruded shape member 3, or a flange portion 4a is joined to the edge of the hollow extruded shape member 3 by fusion welding or the like as a separate member. Thus, the hollow extruded shape member 3 is provided.
[0031]
FIG. 5 shows a case where the corner shape member 4 is mechanically joined to the box girder 1. A joining piece 10 protruding in the horizontal direction is integrally formed at the tip of the web portion 4 b, and the box girder 1 side is formed. Also, a joining piece 11 that abuts on the joining piece 10 is formed integrally, the joining pieces 10 and 11 are overlapped, and the overlapping portion is joined by a stopper 8 such as a high-strength bolt or rivet.
[0032]
FIG. 6 is applied when the box girder structure bridge has a multi-box shape, and when the floor slab 2 is also arranged between the box girders 1 and 1 arranged in parallel at intervals, The corner shape member 4 is required to join not only the box girder 1 and the floor slab 2 but also the floor slabs 2, and the corner shape member 4 is formed in a T shape as a whole, and the flange portion 4 a is formed on both sides from the web portion 4 b. Protruded.
[0033]
Thereby, if a plurality of floor slabs 2 are mutually joined by the flange portion 4a of the corner shape member 4, and the web portion 4b is joined to the box girder 1, even for a bridge having a multi-box shaped box girder structure, The floor slab 2 can be easily joined to the box girder 1. As the joining means, either mechanical joining or welding joining can be used as described above.
[0034]
Furthermore, depending on the joining form of the corner shape member 4 and the floor slab 2, the formation part of the flange part 4a is made different as shown in FIG. 7 (a), or the web part 4b is flanged as shown in FIG. 7 (b). It can also project upward from the portion 4a.
[0035]
【The invention's effect】
As described above, the floor slab and girder coupling structure of the present invention is formed by connecting the box girder by mechanical joining or welding joining via a corner shape formed integrally with the floor slab. The joining work is easy and the workability is improved. In particular, in the case of a small box girder, it is not necessary to perform complicated joining work inside the box girder by using mechanical joining.
[0036]
Furthermore, since the rigid slab such as high-strength bolt friction joint, rivet joint, or weld joint is used for the connection between the floor slab and the girder, a composite girder action between the floor slab and the girder can be expected.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of a first example of welded joint showing an embodiment of a floor slab and girder connection structure of the present invention.
FIG. 2 is a longitudinal front view of a second example of welding joint showing an embodiment of a floor slab / girder connection structure of the present invention.
FIG. 3 is a longitudinal front view of a first example of mechanical joining showing an embodiment of a combined structure of a floor slab and a girder according to the present invention.
FIG. 4 is a longitudinal sectional front view of a first example of a mechanical joining base plate showing an embodiment of a floor slab / girder coupling structure of the present invention in another shape.
FIG. 5 is a longitudinal front view of a second example of mechanical joining showing an embodiment of a floor slab and girder coupling structure of the present invention.
FIG. 6 is a longitudinal sectional front view when implemented in a multi-box box girder structure showing an embodiment of a floor slab / girder joint structure of the present invention.
FIG. 7 is a longitudinal front view of another example of a corner member showing an embodiment of a floor slab / girder coupling structure of the present invention.
FIG. 8 is an explanatory diagram of a bridge having a box girder structure.
FIG. 9 is a front view showing a conventional connecting structure of a floor slab and a girder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Box girder 2 ... Floor slab 3 ... Hollow extrusion shape 3a ... Flange 3b ... Top plate 3c ... Bottom plate 3d ... Side plate 3e ... Hollow part 4 ... Corner shape 4a ... Flange part 4b ... Web part 5 ... Backing Material 6 ... Diaphragm 7 ... Notch 8 ... Stopper 9 ... Bending part 10, 11 ... Joining piece 12 ... Flange 13 ... Web 14 ... Fillet weld 15 ... Contact plate 15a ... Inserting groove 15b ... Bag groove

Claims

In the bridge connecting the floor slab to the girder, the girder is a box girder made of an aluminum alloy hollow extruded shape or plate, and the floor slab is friction stir welded or melted in the longitudinal and width directions of a plurality of aluminum alloy hollow extruded shapes. It is composed of a deck panel formed by welding, and is provided with a corner shape member as a connecting member to the box girder at the edge of the floor slab, and the floor slab and the box girder are connected via the corner shape member. The combined structure of floor slabs and girders.

The floor slab-girder coupling structure according to claim 1, wherein the corner shape member is formed integrally with the floor slab.

3. The floor slab / girder coupling structure according to claim 1 or 2, wherein the corner member is formed in an L-shape or a T-shape comprising a flange portion joined to the floor slab and a web portion joined to the box girder. .

4. The floor slab / girder connection structure according to claim 1, wherein the corner shape member, the floor slab, and the box girder are joined by rigid joining such as high-strength bolt friction welding or welding joining.