钱江四桥抗震性能分析

Analysis of Aseismic Performance for the 4th Qiantangjiang River Bridge

根据钱江四桥地震危险性分析得到的地震动参数,基于两水准设防、两阶段设计的抗震设计思想,采用反应谱和时程分析两种方法对该桥的抗震性能进行了比较分析,分析时考虑了桩-土的相互作用及材料、伸缩缝、支座等非线形效应影响。研究结果表明:钱江四桥的抗震性能满足预期的设计性能目标,不会因地震而破坏。

Comparative analysis is made of the aseismic performance of the 4th Qiantangjiang River Bridge by using the response spectrum method and time-series method on the basis of two levels of seismic protection and two stages of aseismatic design, with the seismic parameters gotten by analyzing the seismic risk of the bridge. At the same time, the interactiong between pile and soil and the effect of non-linearity of the materials, expansion joint and bearings are also considered in the study. The results indicate that the aseismic performance of the 4th Qiantangjiang River Bridge can meet the expected design goal and the bridge would not be damaged under the action of the maximum seismic shock.