Composite deck structure for bridge and bridge structure and construction method thereof
A composite deck structure for a bridge, and a bridge structure and a construction method thereof. The composite deck structure includes a top plate ( 1 ), longitudinal ribs ( 2 ), and transverse ribs ( 3 ), the longitudinal ribs ( 2 ) are fixedly connected to the transverse ribs ( 3 ), and are connected to the diaphragms ( 4 ) by means of the transverse ribs ( 3 ), and the transverse ribs ( 3 ) are not provided with cutouts for accommodating the longitudinal ribs ( 2 ). According to the composite deck structure, no cutout is provided on the diaphragms ( 4 ), and stress generated by the cutouts is reduced; hot-rolled section steel is used for longitudinal ribs ( 2 ) and transverse ribs ( 3 ) instead of welded steel plates, such that welding seams are reduced and fatigue resistance of the composite deck structure is improved.
1 . A construction method of a bridge structure 1 , comprising the following steps:
S1, placing the steel panel ( 12 ) at a bottom layer, and welding the longitudinal ribs ( 2 ) onto the steel panel ( 12 ); and prefabricating steel beam segments comprising the diaphragms ( 4 ) below a deck;
S2, fixedly connecting the transverse ribs ( 3 ) to the longitudinal ribs ( 2 ), so as to form an orthogonal composite deck unit;
S3, overturning the orthogonal composite deck unit, and correspondingly welding the transverse ribs ( 3 ) to the diaphragms ( 4 ) of the steel beam segments, so as to form main steel beam segments of an entire bridge; and
S4, welding the studs ( 13 ) to the steel panel ( 12 ) after the main steel beam segments are transported to a bridge construction site and spliced into a full-length main beam segment by segment, arranging a reinforced steel mesh, and pouring ultra-high-performance concrete on site, so as to finally form a complete bridge structure;
the bridge structure comprising a composite deck structure ( 6 ) and a main beam structure ( 5 ), wherein the main beam structure ( 5 ) is a steel box beam, a steel truss beam, or a steel plate beam; and the main beam structure ( 5 ) comprises diaphragms ( 4 ), the composite deck structure ( 6 ) is fixed onto the main beam structure ( 5 ), and transverse ribs ( 3 ) are spliced on the diaphragms ( 4 ) of the main beam structure ( 5 );
the composite deck structure for a bridge, comprising a top plate ( 1 ) and longitudinal ribs ( 2 ) fixed to a lower surface of the top plate ( 1 ), and further comprising transverse ribs ( 3 ) spliced on diaphragms ( 4 ) of a main beam structure ( 5 ) of the bridge, wherein the longitudinal ribs ( 2 ) are fixedly connected to the transverse ribs ( 3 ), and are connected to the diaphragms ( 4 ) by means of the transverse ribs ( 3 ), and the transverse ribs ( 3 ) are not provided with cutouts for accommodating the longitudinal ribs ( 2 ).
2 . The construction method of a bridge structure according to claim 1 , wherein the diaphragms ( 4 ) are arranged at intervals in the main beam structure ( 5 ), and an interval between two adjacent diaphragms ( 4 ) is 2.5 m-8.0 m.
3 . The construction method of a bridge structure according to claim 1 , wherein the longitudinal ribs ( 2 ) and the transverse ribs ( 3 ) are made of hot-rolled section steel commercially available on the market.
4 . The construction method of a bridge structure according to claim 3 , wherein the longitudinal rib ( 2 ) comprises a longitudinal web plate ( 21 ) and a longitudinal flange plate ( 22 ); the transverse rib ( 3 ) comprises a transverse web plate ( 32 ) and a transverse flange plate ( 31 ); and the longitudinal rib ( 2 ) is fixedly connected to the transverse rib ( 3 ) by means of contact surfaces of the longitudinal flange plate ( 22 ) and the transverse flange plate ( 31 ).
5 . The construction method of a bridge structure according to claim 4 , wherein the longitudinal ribs ( 2 ) and the transverse ribs ( 3 ) are made of one of H-shaped steel, angle steel, I-shaped steel, and T-shaped steel.
6 . The construction method of a bridge structure according to claim 4 , wherein both the longitudinal flange plate ( 22 ) and the transverse flange plate ( 31 ) have a width greater than or equal to 100 mm.
7 . The construction method of a bridge structure according to claim 4 , wherein the longitudinal web plate ( 21 ) has a thickness greater than or equal to 6 mm, and the transverse web plate ( 32 ) has a thickness greater than or equal to 8 mm.
8 . The construction method of a bridge structure according to claim 1 , wherein the top plate ( 1 ) is a composite plate, and the composite plate comprises a steel panel ( 12 ) and an ultra-high-performance concrete plate ( 11 ) poured on a surface of the steel panel ( 12 ); and the steel panel ( 12 ) is provided with studs ( 13 ), and the studs ( 13 ) each have a diameter of 10 mm-30 mm and a height of 25 mm-65 mm.