Steel box girder of steel structure bridge

Abstract

The invention discloses a steel box girder of a steel structure bridge. The steel box girder comprises a bottom plate, transverse partition plates, longitudinal partition plates and a connecting steelframe assembly. Two inclined webs are symmetrically and integrally formed on two sides of the bottom plate, and the top ends of the two inclined webs are both provided with a side plate horizontallyextending towards the outer side. In the present invention, a first transverse steel frame and a second transverse steel frame in the connecting steel frame assembly are welded to the transverse partition plates and the longitudinal partition plates which are welded in a crossed mode, longitudinal supporting steel frames in the connecting steel frame assembly cooperate with supporting plates to support side plates at the top ends of the inclined webs, the inclined webs on both sides of the bottom plate are supported, the phenomena that the inclined webs are crumpled and damaged are effectivelyprevented; and meanwhile, when hoisting is conducted from two sides of the steel box girder, hoisting can be conducted in cooperation with the longitudinal supporting steel frames, the first transverse steel frame and the second transverse steel frame, local stress or accidental bending caused by hoisting tension of the steel box girder is prevented, hoisting of the whole steel box girder is achieved, and the stability during hoisting is improved.

Description

technical field [0001] The invention relates to the technical field of steel structure bridges, in particular to a steel box girder of a steel structure bridge. Background technique [0002] The main load-bearing structure of steel structure bridges adopts steel bridges, namely steel structure bridges, steel bridges, and fabricated steel bridges have been widely used all over the world. The main design concept of steel structure bridges is to assemble the least types of unit components into a Prefabricated steel bridges that carry various loads and spans, and only need to be transported by ordinary medium-sized trucks. Under special circumstances, they can be built entirely by manpower. Steel box girders, also called steel plate box girders, are commonly used structures for long-span bridges form. Generally used on bridges with large spans, it is called steel box girder because it looks like a box. [0003] Steel box girders currently used in steel structure bridges are ge...

AI Technical Summary

Problems solved by technology

[0003] Steel box girders currently used in steel structure bridges are generally connected by roof, floor, web, and diaphragm, medial diaphragm, and stiffeners through full welding. The box girder is supported as a whole. When hoisting, it is mostly fixed and hoisted from both sides of the steel box girder, which may easily lead to compression deformation during hoisting, and the hoisting stability is poor. Phenomenon of crushing failure of oblique web

Images