土-结构动力相互作用对隔震结构影响的模态分析方法  

MODAL ANALYSIS OF BASE-ISOLATED BUILDINGS CONSIDERING DYNAMIC SOIL-STRUCTURE INTERACTION

作　　者：李海岭[1] 葛修润[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《振动与冲击》2000年第3期63-67,共5页Journal of Vibration and Shock

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.

关 键 词：土-结构动力相互作用 模态分析 隔震结构 

分 类 号：TU311[建筑科学—结构工程] TU435