Steel truss-UHPC composite beam bridge hogging moment area structure and construction method

Abstract

The invention discloses a steel truss-UHPC composite beam bridge hogging moment area structure and a construction method, and relates to the technical field of bridge structures. The steel truss-UHPCcomposite beam bridge hogging moment area structure comprises a steel truss beam and a UHPC bridge deck slab; the steel truss beam comprises two main trusses which are transversely arranged in a spaced mode and connected, each main truss comprises a lower chord member and an upper chord member, and the lower chord members are filled with UHPC. The UHPC bridge deck slab is connected with the uppersurfaces of the two upper chord members; a vertical web member is arranged between an upper chord member and a lower chord member; pressed web members and pulled web members are symmetrically and alternately arranged on the two sides of the vertical web members in sequence, and the lower chord members and the upper chord members are connected with integral node plates at nodes. The technical problems that the lower chord members of an existing steel truss beam is prone to pressure instability, the bridge deck slab is prone to tension cracking, and a joint is prone to fatigue damage can be solved.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a steel truss-UHPC composite girder bridge negative moment zone structure and a construction method. Background technique [0002] At present, steel-concrete composite structure bridges are favored and concerned by scholars and engineers. Compared with concrete bridges, they have the advantages of high strength, light weight, short construction period, and good seismic performance. [0003] In related technologies, the steel truss-concrete composite girder bridge is an important branch of the steel-concrete composite structure bridge, and is a new bridge type based on the optimization of the web and floor of the concrete box girder. After the web and bottom plate of the concrete box girder are replaced by the web and chord of the truss system, the utilization rate of materials is improved, and the self-weight of the structure is greatly reduced. Therefore, this bridge t...

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Problems solved by technology

[0008] The embodiment of the present invention provides a steel truss-UHPC composite girder bridge negative moment area structure and construction method to solve the problem that the lower chord of the steel truss girder is prone to pressure instability, the bridge deck is prone to tensile cracking, and the nodes are prone to fatigue in the related art. disruptive technical issues

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