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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。
The design and construction of the Hiaodao Bridge is a huge challenge in the bridge construction in the new century. Super-long-span bridges are not just extrapolations of conventional concepts, but require corresponding structural systems. To fundamentally change the cable system of cable-bearing bridges can break through the span limit. This paper points out the constraints of the conventional structural system to a larger span, and introduces various systems that may be used in super long span cable-stayed bridges, suspension bridges and cable-stayed suspension combined bridges from the point of view of the cable system. These systems are trying to go far beyond the existing limits in static and dynamic aspects, greatly improving the spanning capability of bridges. At the same time, the adoption of the new system has also posed a great challenge to materials, design and construction.