Steel-concrete combination segment structure equipped with cells and used for long-span self-anchored suspension bridge

Abstract

The invention discloses a steel-concrete combination segment structure equipped with cells and used for a long-span self-anchored suspension bridge. A variable-height stiffening segment is provided with a bottom plate. The steel-concrete combination segment structure sequentially comprises a concrete cross beam segment, a steel cell segment, a steel beam stiffening variable-height segment and a steel beam stiffening constant-height segment. The steel-concrete combination segment structure has the beneficial effects of reasonable design, simple structure, and convenient and efficient construction. The steel-concrete combination segment structure also has the beneficial effects of optimizing the stress performance of a steel-concrete combination segment, adapting to structural needs of the long-span self-anchored suspension bridge, enlarging a combination surface of a combination part by virtue of the structure with the cells, forming multi-directional restraints on filled concrete, enhancing the combination of a steel beam and a concrete beam, improving the stress condition on the concrete at the combination part, bringing the functions of connectors into full play by virtue of theconstruction mode of rear pressure-bearing plates, enabling the force transmission to be clear and definite, achieving relatively small stress concentration at the combination surface, enabling the concrete of the cells and a main beam to form a continuous structure, facilitating concrete pouring construction, and enabling the concrete at the roots of the connectors to be not prone to disintegration.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a steel-concrete junction structure with cells for a long-span self-anchored suspension bridge, and particularly to its mechanical connection structure. Background technique [0002] The long-span self-anchored suspension bridge should adopt the hybrid beam structure of main span steel girder and side span concrete girder. This structural form can significantly reduce the weight of the main girder of the main span and at the same time solve the problem of side span pressure. The traditional steel-concrete combination section, which uses a pressure-bearing plate and a steel cell with 2 to 4 rows of vertical shear keys, has been applied to a large-span composite girder cable-stayed bridge or a small-span self-anchored suspension bridge . However, for long-span self-anchored suspension bridges, since the internal force of the main girder increases rapidly with the incr...

AI Technical Summary

Problems solved by technology

However, for long-span self-anchored suspension bridges, since the internal force of the main girder increases rapidly with the increase of the span, the steel-concrete joint section must be more complicated than the conventional structure

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