深水中大跨径斜拉桥地震响应分析

本文以某斜拉桥为例,采用基于Morison方程的附加动水质量方法研究了动水压力对深水中大跨径斜拉桥地震响应的影响,并对中国、日本和欧洲规范中动水惯性系数的取值进行了对比研究。结果表明,在深水条件下应当考虑动水压力作用对结构地震响应的影响。对比日本和欧洲规范,我国规范中动水惯性系数取值偏低,动水压力的影响偏小。

Seismic Response Analysis of Long Span Cable-stay Bridge in Deep Water

A cable-stay bridge is taken as an example to analyze the effect of hydrodynamic pressure on seismic response of the bridge, which is built in deep water. Associated hydrodynamic mass method based on Morison equation is used in this paper. Comparative study on hydrodynamic inertia coefficient in specifications of China, Japan and Europe is performed. It is shown that hydrodynamic pressure should be considered when the bridge is built in deep water. Compared with specifications of Japan and Europe, the value of hydrodynamic inertia coefficient in our Chinese specification is relatively smaller than that of specifications of other countries mentioned above.