Multi-chord combined beam structure

Abstract

The invention discloses a multi-chord combined beam structure. A multi-chord combined beam mainly comprises a reinforced concrete top plate, a corrugated steel web and a chord bottom plate, wherein the reinforced concrete top plate is connected with one end of the corrugated steel web through a shear-resistant connecting piece; the other end of the corrugated steel web is connected and fixed to the chord bottom plate; the chord bottom plate consists of at least two chords of which the extending direction is the same as that of the reinforced concrete top plate and which are parallel to each other; and the chords are connected through a connecting piece. By the multi-chord combined beam structure in the embodiment of the invention, the rigidity and ultimate bearing capacity of the multi-chord combined beam are greatly improved, and the multi-chord combined beam has high deformation resistance and ductility; and the chord bottom plate is convenient to construct and subsequently maintaindue to a large operation space.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a multi-chord composite beam structure. Background technique [0002] Steel and concrete are the most commonly used building materials in bridge engineering, and the composite bridge structure composed of steel and concrete is also one of the important directions of bridge development in my country in recent years. [0003] The existing steel-concrete composite beam structures are mainly divided into the following three types according to the structure types: [0004] The first type is mainly composed of reinforced concrete roof and steel beams. The steel beams are divided into I-beams, open steel box girders, closed steel box girders, and steel trusses according to the application environment. Among them, I-beams are widely used. In addition to girder bridges, they can also be used in reinforced girders of cable-stayed bridges. In recent years, there are many applications in m...

AI Technical Summary

Problems solved by technology

Wherein, the chord composite beam structure is composed of a reinforced concrete roof 91, a corrugated steel web 92 and a chord 93. As shown in the figure, the chord 93 is a direction in which the extension direction of the reinforced concrete roof 91 is the same as that of the reinforced concrete roof 91. The steel pipes 931 arranged parallel to the top plate 91, the steel pipes 931 and the corrugated steel webs 92 form a composite beam with an inverted triangular cross-section. The low problem, however, because the chord 93 is set as a single piece, the operable space of the chord 93 of the bridge is limited, that is to say, it will cause a lot of inconvenience in bridge construction and later maintenance. At the same time, the single chord at the bottom The structure needs to accommodate both bending moments and shear forces in the beam, resulting in poor performance in terms of stiffness and ultimate capacity

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