多点随机激励下自锚式悬索桥的地震响应

英文篇名：Seismic Responses of Self-anchored Suspension Bridges Subjected to Multi-support Stochastic Excitations
中文刊名：东北林业大学学报
英文刊名：Journal of Northeast Forestry University
作者：刘春城 ; 石磊 ; 刘向阳 ; 郑传杰
英文作者：Liu Chuncheng(School of Civil & Architecture Engineering ; Northeast Dianli University ; Jilin 132012 ; P.R.China) ; Shi Lei(Dalian University of Technology) ; Liu Xiangyang ; Zhang Chuanjie(Northeast Dianli University)
中文关键词：均匀调制 ; 非平稳 ; 随机激励 ; 自锚式悬索桥 ; 地震响应 ; 功率谱
英文关键词：Uniform modulation ; Non-stationary ; Stochastic excitation ; Self-anchored suspension bridges ; Seismic response ; Spectrum density
出版日期：2008-12-25
机构：东北电力大学;大连理工大学桥梁工程研究所;
年：2008
期：12
出版单位：东北林业大学学报

摘要

通过引入均匀调制演变函数,来考虑地震激励幅值的非平稳性,同时应用虚拟激励法进行求解。由于该方法自动计算参振振型的互相关项和激励的互相关项,其计算结果精确高效。对一座自锚式混凝土悬索桥结构进行了地震反应分析。结果表明,地震动的非平稳行波效应和非平稳相干效应对自锚式悬索桥结构的地震反应产生很大的影响。
The uniformly modulated evolutionary function is introduced into the seismic response analysis of a self-anchored suspension bridge subjected to the non-stationary seismic excitation amplitudes.The pseudo excitation method is utilized to solve this problem.High computation precise was obtained due to the correlative items between participant modes and between excitations computed by the pseudo excitation method automatically.Seismic response of a concrete self-anchored suspension bridge is analyzed.Result shows that wave passage effect and coherence loss have significant influence on the seismic peak response of self-anchored suspension bridge.

引文

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