Orthotropic steel bridge deck closed stiffening rib structure with built-in rib strips

Abstract

The invention relates to the technical field of bridge engineering, in particular to an orthotropic steel bridge deck closed stiffening rib structure with built-in rib strips. The orthotropic steel bridge deck closed stiffening rib structure with the built-in rib strips comprises a bridge deck slab, a diaphragm plate fixed to the bottom of the bridge deck slab, a middle web and a plurality of closed stiffening ribs. The diaphragm plate is perpendicular to the middle web. The multiple closed stiffening ribs are evenly arranged on the diaphragm plate and located on two sides of the middle web. The two side walls of each closed stiffening rib are both fixedly connected with the diaphragm plate. The rib strips are arranged in the positions, corresponding to the connecting portions of the diaphragm plate, of the two inner sides of each closed stiffening rib. The plate surfaces of the rib strips and the diaphragm plate are arranged in a coplanar mode. By arranging the small rib strips in closed stiffening rib inner cavities, corresponding to the connecting portions of the diaphragm plate, of the closed stiffening ribs, the diaphragm plate provides effective elastic supporting for the closed stiffening ribs, and thus deformation and stress of force bearing sensitive areas of the closed stiffening ribs and the connecting portions of the diaphragm plate are improved, the problem of fatigue cracks in the intersecting positions of the closed stiffening ribs and the diaphragm plate of an orthotropic steel bridge deck is solved, and the fatigue performance of the orthotropic steel bridge deck is improved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an orthotropic steel deck closed stiffener structure with built-in ribs. Background technique [0002] Orthotropic steel decks are composed of thinner steel decks, thinner steel longitudinal stiffeners and thinner steel diaphragms (beams). The three are perpendicular to each other and welded together to bear the bridge deck load. Due to the different stiffnesses in mutually perpendicular directions, anisotropy appears in the force behavior. The longitudinal stiffeners of the steel bridge deck are divided into closed stiffeners and open stiffeners according to whether the stiffener section is closed or not. [0003] The fatigue problem of orthotropic steel bridge decks has always been a structural problem that has attracted much attention, directly affecting and controlling the actual service life of structural parts. Due to the different rigidities and different stre...

AI Technical Summary

Problems solved by technology

Due to the relatively difficult processing and welding of heightened and thickened V-ribs, high processing and welding precision requirements, and the use of heightened and thickened V-rib consumables is more than that of commonly used U-rib consumables, resulting in unsatisfactory technical and economic rationality.

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