铁道标准设计2016，Vol.60Issue(8)：54-58,5.
行波及相干效应对超千米跨度斜拉桥多维多点随机地震响应的影响
The Influence of Traveling Wave and Coherent Effects on Multi-dimensional and Multi-point Random Seismic Response of Super Long Span Cable Stayed Bridge
摘要
Abstract
In order to study the influence of traveling wave and coherent effects on seismic response of the super long span railway double purpose cable stayed bridge, the seismic response of the structures with two effects are obtained with the aid of the efficient virtual excitation method based on the general finite element software ANSYS. The results of the comparative study show that:( 1 ) when only the traveling wave effect is considered, the effect of the traveling wave on the longitudinal displacement of the main beam is the most significant, while the apparent wave velocity of 500 m/s is taken with the maximum root mean square value of both the longitudinal displacement and the vertical displacement of the main beam;( 2 ) when only the coherence effect is considered, the longitudinal displacement and transverse displacement of the main beam appear under partially coherent conditions, the root mean square value of the transverse displacement of the main beam is 0. 274 m, and the uniform excitation ( totally coherent) increases by 126. 4%; ( 3 ) the seismic responses of the two effects differ much in the structures of No. 1 side pier, No. 2 auxiliary Pier and No. 3 main tower, and need to be analyzed specifically. By comparing the results of the specific conditions, we obtain that it is necessary to include traveling waves and coherent effect in the analysis of seismic response of large span cable-stayed bridges.关键词
斜拉桥/公铁两用桥/行波效应/相干效应/随机地震场模拟/地震反应分析Key words
Cable-stayed bridge/Combined highway and railway bridge/Traveling wave effect/Coherence effect/Random seismic simulation/Seismic response analysis分类
交通工程引用本文复制引用
范晨阳,郑史雄,陈航,张金..行波及相干效应对超千米跨度斜拉桥多维多点随机地震响应的影响[J].铁道标准设计,2016,60(8):54-58,5.基金项目
国家自然科学基金项目(51308465) （51308465）
中央高校基本科研业务费专项基金(2682014CX004EM) （2682014CX004EM）
