Steel box beam orthotropic deck slab

Abstract

The invention discloses a steel box beam orthotropic deck slab. The steel box beam orthotropic deck slab comprises an upper top plate, a corrugated steel plate and a lower top plate which are sequentially connected from top to bottom. The corrugated direction of the corrugated steel plate is consistent with the transverse bridge direction. The corrugated steel plate is composed of crest surfaces, trough surfaces and inclined planes connected with the crest surfaces and the trough surfaces, wherein the crest surfaces, the trough surfaces and the inclined planes are staggered in the transverse bridge direction. Included angles of the inclined planes and the crest surfaces and included angles of the inclined planes and the trough surfaces are not 90 degrees, and the corrugated cross section of the corrugated steel plate is a plurality of continuously arranged trapezoids. The corrugated steel plate is utilized to serve as a longitudinal stiffening rib of a steel box beam deck top plate, the orthotropic slab formed by the upper top plate, the lower top plate and the middle layer corrugated steel plate is similar to a parallel chord truss with an inclined web member in the transverse bridge direction, pressure resistance stability and transverse flexural rigidity of the deck slab are improved, and excessive local deformation under the effect of a concentrated wheel load is effectively avoided. According to the steel box beam orthotropic deck slab, a traditional welding mode is abandoned, bolting is adopted completely, and the problem of fatigue cracking of welding cracks can be solved thoroughly.

Description

technical field

[0001] The invention belongs to the technical field of bridge structures and relates to an orthotropic deck structure suitable for steel box girder bridges. Background technique

[0002] At present, the long-span suspension bridges and cable-stayed bridges of highways basically use streamlined steel box girders as stiffening girders. However, due to the greater structural flexibility of the steel box girder, the steel bridge deck generally adopts an orthotropic plate structure, that is, the longitudinal U-shaped ribs, transverse ribs, and diaphragms are used to strengthen the steel bridge deck to increase its rigidity. But even so, the cracking problem of the steel bridge deck pavement is still not well resolved. The current steel bridge deck pavement mainly has the following three problems.

[0003] The first is the cracking of the longitudinal bridge to the deck pavement. This kind of typical cracking is due to the fact that the orthotropic steel deck is...

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