Corrugated steel web-based steel-wood combined box girder

Abstract

The invention discloses a corrugated steel web-based steel-wood combined box girder which comprises a wood top plate, a wood bottom plate positioned right below the wood top plate, and steel webs distributed between the wood top plate and the wood bottom plate; the longitudinal lengths of the wood top plate and the wood bottom plate are both consistent with the span of the constructed box girder, and the widths of the two are both consistent with the cross bridge width of the constructed box girder; the wood top plate and the wood bottom plate are both laminated wood plates, each laminated wood plate is formed by assembling a plurality of strip-shaped wood plates side by side, the plurality of strip-shaped wood plates are fastened and connected as a whole through a plurality of prestressed steel bundles arranged in cross bridge direction; the plurality of strip-shaped wood plates are arranged on the same one plane and distributed in longitudinal bridge direction; and two steel webs are both of corrugated steel plates. The corrugated steel web-based steel-wood combined box girder is reasonable in structure design, convenient to transport and install, shorter in construction period, small in influence by weather and good in use effect, and can solve various problems of the existing corrugated steel web prestressed concrete combined box girder.

Description

technical field [0001] The invention relates to a steel-wood composite box girder, in particular to a steel-wood composite box girder based on corrugated steel webs. Background technique [0002] Since the ACSI Association introduced the prestressed concrete composite box girder with corrugated steel webs as a bridge structure in 1988, all countries in the world have conducted research on this composite structure. The engineering volume of the substructure is reduced. In addition, due to the low longitudinal stiffness of the corrugated steel web, it does not restrain the creep and shrinkage deformation of the upper and lower concrete slabs, thus avoiding the transfer of the prestress of the box girder section to the steel web and improving the prestress. Stress efficiency reduces the amount of prestressed steel, effectively solves the problem of concrete web cracking and improves durability. [0003] However, the top and bottom slabs used in the corrugated steel web prestr...

AI Technical Summary

Problems solved by technology

In the actual construction process, due to the large volume of the concrete roof and floor, its transportation and installation are not convenient; secondly, the concrete roof and floor are easy to crack, and often work with cracks, so the construction is difficult, quality defects are prone to occur, and reinforcement and maintenance are difficult

In addition, the construction of concrete roof and floor is greatly affected by the climate, especially the low temperature in winter has a great influence on the setting effect of concrete, and its durability has not been popularized in underdeveloped areas.

At the same time, the curing and hardening period of the concrete roof and floor is long, and the construction period is long

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