Composite beam stayed cable-suspension cable cooperation bridge

Abstract

The invention discloses a composite beam stayed cable-suspension cable cooperation bridge which comprises a bridge head, auxiliary piers, a steel girder, a concrete girder, a combining part girder, a transition region girder, a stayed cable, a transition region stayed cable, a main cable, a suspension cable, a transition region suspension cable and a length regulating device, wherein the steel girder is positioned in the middle of a bridge body; two ends of the steel girder are sequentially and fixedly connected to the concrete girder by virtue of the transition region girder and the combining part girder; the concrete girder is adopted at the whole or partial length of side span parts 12 at two ends of the bridge, and the side span parts 12 are supported on the auxiliary piers; The midspan region 13 of the midspan part of the bridge is equal to 1 / 311-2 / 311 and the midspan region is suspended by virtue of the main cable. The novel stayed cable-suspension cable cooperation bridge provided by the invention is high in structural rigidity, high in damping, good in economical efficiency, uniform and smooth structural rigidity transition of a steel-concrete combining part and a stayed cable-suspension cable transition region, and good in fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a hybrid cable-stayed-suspension collaborative bridge. Background technique [0002] The cable-stayed-suspension cooperative bridge is a cooperative bridge developed on the basis of traditional cable-stayed bridges and suspension bridges. The use of suspension bridges in the mid-span part of the mid-span can solve the problem of excessive pressure on the main girder during the cantilever construction of the cable-stayed bridge. With the cooperation with the cable-stayed bridge, the stiffness of the suspension bridge can be improved, the tension of the main cable and the scale of the anchorage can be reduced, which is of great significance especially for deep water and soft ground conditions. [0003] The bridge design master Roblin first put forward the idea of ​​a cable-stayed-suspension collaborative system, and in 1883 he designed and built the Brooklyn Bridge, whi...

AI Technical Summary

Problems solved by technology

[0006] Although the cable-stayed-suspension collaborative bridge has strong advantages, the cable-stayed system and the suspension system are two structural systems with completely different stress forms, that is, the main girder of the cable-stayed bridge is a compression-bending structure, while the main girder of the suspension bridge The stiffened beam is a pure bending structure. When the two systems are combined, the discontinuity and discontinuity of the structural performance of the joint is the main difficulty of the cable-stayed-suspension collaborative structure.

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