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一、前言任何一个建筑物总是通过基础和地基相连。地基—基础—结构三者连在一起形成一个体系。在这三者当中,任何一方受到外界动载的作用都会导致整个体系的振动。显然把地基视作刚性,并把地表地震波直接输入上部结构是不合理的,它既没有考虑上部结构与基础间的相互作用,又没有考虑基础与周围介质间的相互作用。已有的震害实例和实测实例表明,在某些情况下,这种相互作用是很明显的,是考虑结构反应时不容忽略的一个方面。
I. INTRODUCTION Any building is always connected by foundation and foundation. The foundation-basic-structure three together form a system. Among these three parties, any party that is affected by external forces will cause the entire system to vibrate. Obviously, considering the foundation as rigid and directly inputting the surface seismic waves into the superstructure is not reasonable. It does not consider the interaction between the superstructure and the foundation, nor does it consider the interaction between the foundation and the surrounding medium. The existing seismic damage examples and actual measurement examples show that in some cases, this interaction is very obvious, and it is an aspect that cannot be ignored when considering structural reactions.