连续梁桥的抗震能力概念设计

Conceptual Design of Continuous Bridges

连续梁桥应用广泛,对确保交通网络畅通具有举足轻重的作用。通常情况下由于地形条件、路线走向等非抗震因素影响致使桥梁结构的抗震体系不合理,导致抗震能力不足。基于抗震设计的基本原则,对桥梁结构灵活处理能有效获得良好的抗震体系。结合地震中桥梁震害以及工程经验等,探讨与分析了抗震概念设计的基本原则,并通过实例分析说明了抗震概念设计能从根本上提高桥梁的抗震性能,为实现经济有效的抗震设防提供有益参考。

Continuous bridges have a widely application in the construction of transportation and they are very important to guarantee the flow of transportation network. But, for the reason of geographic condition, route and other non-seismic factors, the seismic systems of bridges are not reasonable and the anti-seismic capability is not sufficient. Based on the basic design philosophies, conceptual design of bridges can get a good seismic performance. This paper, considering the seismic damage of bridges, puts forward the basic philosophies of conceptual design, and combined with the engineering example, the paper discusses the importance and effec- tiveness of seismic conceptual design, providing some helpful references for the seismic design of the continuous bridges.