Continuous box girder with corrugated steel web and steel-concrete composite structure

Abstract

The invention relates to a box girder, particularly to a continuous box girder adopting a corrugated steel web steel and concrete composite structure, which includes two or more corrugated steel webs, a top steel plate, a bottom steel plate, concrete and a connecting end, wherein the corrugated steel webs are arranged between the top steel plate and the bottom steel plate; the top steel plate, the bottom steel plate and the corrugated steel webs are all connected through welding; the single girder body structure forms a continuous girder structure through the connecting end; the top steel plate or the bottom steel plate is combined with concrete to form a concrete composite structure. The corrugated steel webs in the continuous box girder realize the smooth transition of a straight line section and an arc section through three transitional sections at corners, solve the problem of stress concentration at corners; besides, a pressure-bearing part adopts a steel and concrete composite structure with micro strain waves, so that the problem of stress concentration in the composite structure is solved, and excellent structural performance and economy can be obtained.

Description

technical field [0001] The invention relates to a box girder, in particular to a continuous box girder with corrugated steel web steel-concrete composite structure. Background technique [0002] At present, traditional box girders or steel box girders generally have a height-to-thickness ratio of about 100:1 according to the requirements of shear buckling resistance. Can be as large as 300:1. For the corrugated steel web used in the existing corrugated steel web box girder, the corrugation of the web is composed of a straight line segment and an arc segment, and stress concentration is likely to occur at the connecting part of the straight line segment and the arc segment. Steel plates are also used for the compression flanges of traditional I-beams or steel box girders. The use of steel structures in the compression area cannot reflect the economy of steel structures. If steel-concrete composite structures are used, most of the compressive stress in the compression area wi...

AI Technical Summary

Problems solved by technology

Provides a way to increase the cross-sectional rigidity of the beam body and the strength of the connection end by setting the end plate of the head. The waveform of the web is composed of three parts: a straight line section, a transition section, and an arc section, and the transition section can effectively connect the straight line section. With the arc section, it solves the problem of stress concentration when the straight line section and the arc section are directly connected. The plug-in pressure-bearing structure in the compression area not only makes the connection stable, but also has shrinkage space when the temperature changes, and the connection in the tension area is stable. At the same time, the setting of the cavity can resist the thermal expansion phenomenon of the corrugated steel web steel-concrete composite structure continuous box girder when the temperature of the beam body changes

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