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一、前言结构受到强烈地震时,其基底可能出现局部提离,这种几何非线性效应将对结构反应的振幅和频率成分产生影响。一些学者已经注意到了提离问题。Wolf(1976)对一座圆形反应堆建筑物进行了深入的分
I. INTRODUCTION When the structure is subjected to a strong earthquake, its basement may be lifted off locally. This geometric nonlinear effect will affect the amplitude and frequency components of the structural response. Some scholars have already noticed the issue of lifting. Wolf (1976) made a deep division of a circular reactor building