摘要
考虑了地震动空间效应 ,包括行波效应、部分相干效应和局部场地效应的影响 ,应用虚拟激励法 ,对一座拟建的主跨 2 40 m自锚式混凝土悬索桥在多点随机激励下进行了纵向地震反应分析 .计算结果表明 :在多点随机激励下 ,行波效应和部分相干效应除了使锚固端轴力略有增加外 ,其它部位结构动内力和动位移都减小 .文中采用了 3种相干模型进行分析 ,通过计算结果的比较 。
The seismal response of a self anchored suspension bridge being constructed with main span 240m to multiple supported stationary random excitation is investigated. The pseudo excitation method (PEM) is utilized to take into account the seismal action with spatial variation, including traveling effect, coherence loss and local site condition. The calculation suggests that the dynamic internal force and displacement are decreased , in addition to axial force in anchorage block to multiple support random excitation by considering traveling effect and coherence loss. Three coherence models are utilized in this paper, by comparing the results, some advice on the coherence model selecting has been put forward.
出处
《武汉理工大学学报（交通科学与工程版）》
北大核心
2002年第5期607-610,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
自锚式悬索桥
纵向地震反应
虚拟激励法
相干模型
相干效应
spatial variation effect
random excitation
self anchored suspension
seismal response
power rate spectrum
