Shear part joint composite structure of composite beam bridge and construction method of shear part joint composite structure

Abstract

The invention discloses a shear part joint composite structure of a composite beam bridge and a construction method of the shear part joint composite structure. The composite structure comprises a steel structure composed of a steel beam and a connecting structure arranged on the steel beam in the length direction and provided with a left groove and a right groove, a left concrete slab and a right concrete slab which extend into the left groove and the right groove of the connecting structure respectively and are fixed through bolt connecting pieces, and a covering layer covering the connecting structure and the left concrete slab and the right concrete slab. According to the invention, welding operation is not needed, all components can be prefabricated in a factory, the field construction efficiency can be improved, and the construction quality is improved; besides, the high-strength bolts provide vertical pre-tightening force and in-plane shear rigidity at the same time, and act together with the penetrating steel bars, so that the shear resistance of the structure is improved, the stress of the joint concrete is improved, and the structural resistance is enhanced.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a joint composite structure of shear members of a composite girder bridge and a construction method thereof. Background technique [0002] The steel-concrete composite girder bridge is a new type of composite structure developed by making full use of the characteristics of steel and concrete materials. The steel girder is usually prefabricated in the factory. The construction method of the bridge deck is cast in place, and the key to the overall joint work of the steel-concrete composite girder bridge lies in the resistance of the shear connectors to the relative slippage of steel and concrete. [0003] At present, commonly used forms of shear connectors include stud connectors, steel connectors, bent bar connectors, and PBL connectors. Among them, stud connectors require a lot of welding work, and some studs are restricted by actual construction. It canno...

AI Technical Summary

Problems solved by technology

The traditional joint structure directly pours concrete in the reserved shear member area, which often has problems such as complicated procedures, poor concrete quality, low bonding performance of new and old concrete, and difficult to estimate the impact of shrinkage and creep.

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