超大跨度缆索承重桥梁结构体系

设计和建造跨海连岛大桥是新世纪桥梁工程面临的巨大挑战。超大跨度桥梁并不只是常规概念的外推,需要与之对应的结构体系。从根本上改变缆索承重桥梁的缆索体系,可以突破跨度极限。本文指出了常规结构体系向更大跨度发展的制约因素,从缆索体系的角度介绍了超大跨度斜拉桥、悬索桥以及斜拉 悬索组合桥可能采用的各种体系。这些体系试图在静力、动力方面能远远超出现有限制范围,极大地提高桥梁的跨越能力。同时,新体系的采用也给材料、设计和施工提出了很大的挑战。

Structural Systems for Ultra-long Span Cable Supported Bridges

There is perhaps no greater challenge to the bridge profession than the proper design and construction of a bridge crossing over a strait. Ultra-long span cable supported bridges are not merely extend its capabilities by simple extrapolations of rather conventional concepts and they must have corresponding structure systems. With fundamental changes in structural systems, the span limit can be increased. This paper introduced the various cable systems of ultra-long span cable supported bridges, including cable-stayed bridges, suspension bridges and Combined Suspension and Cable-stayed systems. These systems try to break through the limits and make quantum leaps.It is hoped that this paper will be good for the research on structural systems for ultra-long span cable supported bridges.