摘要
本文将频域模态分析方法推广到土 -结构动力相互作用对基础隔震结构的影响分析中。基于上部结构固定时具有正则振型的假设下 ,推导了地震激励作用下 ,土 -结构动力相互作用对基础隔震结构影响的频域模态分析的步骤。算例表明 ,采用低阶模态进行计算 ,得到较高精度的分析结果的同时 。
Modal analysis in frequency domain is used to analyze the effect of soil-structure interaction on the vibration of base-isolated buildings.Based on the assumption that with the upper part fixed the structure possesses classic normal modes,analysis procedure is deduced when the stracture is under earthquake excitation.Computational results illustrate that good approximation can be achieved with less computational effort by applying the first few vibration modes.
出处
《振动与冲击》
EI
CSCD
2000年第3期63-67,共5页
Journal of Vibration and Shock
关键词
土-结构动力相互作用
模态分析
隔震结构
dynamic soil-structure interaction,base-isolation,modal analysis in frequency domain
