Inverted cold-bent U-shaped steel composite beam bridge connected through lacing bars and construction method

Abstract

Provided are an inverted cold-bent U-shaped steel composite beam bridge connected through lacing bars and a construction method. The inverted cold-bent U-shaped steel composite beam bridge connected through the lacing bars comprises a plurality of cold-bent U-shaped steel beams which are arranged in parallel, wherein the cold-bent U-shaped steel beams are provided with prefabricated concrete bridge panels; each cold-bent U-shaped steel beam comprises an upper flange plate and a lower flange plate, webs are arranged between the upper flange plates and the lower flange plates, and the upper flange plates, the lower flange plates and the webs form structures with the cross sections as trapezoids; each lower flange plate comprises two lower flange plate bodies which are arranged at an interval, and the two ends of each two lower flange plate bodies which are arranged at the interval are connected through the corresponding beam bottom lacing bars. According to the inverted cold-bent U-shaped steel composite beam bridge connected through the lacing bars, the force transmission efficiency is high, the flexural rigidity is greatly improved, steel material consumption is saved, and good economic benefit can be obtained; the U-shaped steel beams can be prefabricated and spliced in an industrial mode, so that the construction requirements are fast met; meanwhile, according to the bridge,under the condition that safety, the practicability and economy are achieved, the shape is novel and compact, and the bridge can well harmonize with the environment.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to an inverted cold-formed U-shaped steel composite girder bridge connected by strips and a construction method. Background technique [0002] Due to its economic and technical advantages, cold-formed U-shaped steel composite girder bridges are widely used in small and medium-span bridge projects, especially for bridges with spans ranging from 5 to 18 m. The main girders of the traditional cold-formed U-shaped steel composite girder bridge do not have a certain horizontal connection. During the construction and use of the bridge, the transverse direction of the cold-formed U-shaped steel composite girder bridge can only be connected by the bridge deck. As a result, the lateral stability of the bridge structure is poor, the overall stiffness and torsion resistance of the bridge are low, and the span of the bridge is limited to a certain extent. If this type of bridge is ...

AI Technical Summary

Problems solved by technology

In the traditional cold-formed U-shaped steel composite girder bridge, there is no certain horizontal connection between the main girders. During the construction and use of the bridge, the transverse direction of the cold-formed U-shaped steel composite girder bridge can only be connected by the bridge deck. As a result, the lateral stability of the bridge structure is poor, the overall stiffness and torsion resistance of the bridge are low, and the span of the bridge is limited

If this type of bridge is used within a relatively large span range (40-80m), it may be that the main girder is under a single piece of force due to insufficient transverse overall rigidity, endangering the safety of traffic and pedestrians

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