Waveform steel web composite beam structure with multi-section stiffening rib and construction method thereof

Abstract

The invention discloses a waveform steel web composite beam structure with a multi-section stiffening rib and a construction method thereof, and the waveform steel web composite beam structure comprises a concrete slab, a steel beam and a multi-section FRP stiffening rib; the multi-section FRP stiffening rib is composed of a FRP rib plate and a FRP splicing plate, each section of FRP rib plate isintegrally connected through the FRP splicing plate, a plurality of sections of FRP stiffening ribs are arranged along the beam in a straight line, and are connected to the peaks or troughs of the waveform steel web only in a wavelength range. The waveform steel web composite beam structure with the multi-section stiffening rib has a higher overall shear buckling bearing capacity. The multi-section stiffening rib can flexibly adapt to the waveform steel web with any shape to avoid the complicated construction of the whole corrugated plate stiffening, the residual deformation and residual stress caused by welding the stiffening rib are eliminated, the construction speed is improved significantly, and the construction difficulty is reduced.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a corrugated steel web composite beam structure with multi-section stiffeners and a construction method thereof. Background technique [0002] As of 2018, there are more than 800,000 highway bridges in my country, most of which are prestressed concrete bridges. As the span increases, web cracking and long-term deflection of prestressed concrete bridges become the main problems that plague the application of this type of bridge. The use of corrugated steel webs instead of concrete webs can effectively reduce the weight of the structure, improve the efficiency of prestressing, avoid cracking of the concrete webs, and speed up the construction. When further reducing the structural weight and building height, corrugated steel web-steel floor composite girder bridges can be used. [0003] Due to the limitations of the process, the thickness of the corrugated steel web is l...

AI Technical Summary

Problems solved by technology

Due to the corrugated characteristics, the construction difficulty of improving the shear buckling capacity by welding stiffeners is stronger than that of flat plates, and welding will produce structural deformation and residual stress, which will affect the buckling resistance of the web

In addition, as the load level of the road increases, the shear capacity of the corrugated steel web composite girder bridges may not meet the requirements of the existing road load, and it is necessary to find a simple method to improve the shear buckling capacity of the corrugated steel web Methods

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