Bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and construction method thereof

Abstract

The invention relates to a bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and a construction method thereof and belongs to a novel bridge structural system applied to a continuous composite girder bridge or a composite rigid frame bridge. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention is composed of super-high-performance concrete, ordinary concrete and steel beams. According to the ridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention, shear-resisting connection components and upper concrete plates are connected with each other so as to form an integrated body and work jointly, and therefore, the strength and rigidity of the bridge can be improved, and the quantity of steel consumption of the whole bridge can be decreased. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention has respective advantages of an ordinary composite bridge deck system and super-high-performance concrete, and the advantages of high strength, high rigidity, excellent anti-cracking performance, high durability, easiness in construction and the like, and has a broad application prospect in composite structure bridges on which negative moment regions exist, such as a continuous girder bridge and a rigid frame bridge.

Description

technical field [0001] The invention relates to a new type of bridge structure applied to continuous composite girder bridges or composite rigid frame bridges, and belongs to the technical field of bridge engineering. Background technique [0002] When the span of the bridge is large, the continuous girder bridge or rigid frame bridge scheme can significantly reduce the peak value of the bending moment under the action of the vertical load, reduce the material consumption of the bridge, and improve the comprehensive economy. For continuous composite beam bridges or composite rigid frame bridges, the composite beams at the intermediate supports or pier columns are in the negative moment zone, and the upper concrete deck is in tension, so there is a high risk of cracking. However, the composite beam after the cracked concrete slab not only reduces the stiffness, but also has serious problems in long-term service performance and durability. In order to improve the anti-crack p...

AI Technical Summary

Problems solved by technology

For continuous composite beam bridges or composite rigid frame bridges, the composite beams at the intermediate supports or pier columns are in the negative moment zone, and the upper concrete deck is in tension, so there is a high risk of cracking

However, the composite beam after the cracked concrete slab not only reduces the stiffness, but also has serious problems in long-term service performance and durability.

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