| The problem of structure-foundation dynamic interaction is an essential research subject in the field of earthquake-engineering. At the same time, in recent years, base isolation technologies attracted more and more concentration and have been wildly used in many fields. However, in the traditional theory analysis, the influence on base isolation property of the soil-structure interaction was seldom considered for the base isolation structure. This paper focus on this problem, calculating and analyzing the response of a structure with laminated rubber beatings considered the soil-structure interaction by LS-DYNA which is one of the large-scale finite element analysis software. Then provide some beneficial results. The details are as follows:1. The development of soil-structure dynamic interaction and calculating methods, as well as the evolution of base isolation technology in the world are summarized briefly in the paper. Furthermore, some existed limitation and emphases of this research work are presented.2. LS-DYNA program simulates the effects of infinite field by adopting viscous boundary. Because the viscous boundary is a kind of low precision artificial boundary, the paper improved viscous boundary to viscous-spring boundary with high precision through adding springs to artificial boundary. The feasibility of this method is testified through the example of wave source and dispersion problems on three dimensions in full space and semi-space.3. This paper takes Anti-seismic Center Synthetical Building in Yunnan Province as an example, and analyzes the 7-storied framed base-isolated structure by inputting seismic waves with improved LS-DYNA. Via establishing essential models to compare the influence of vibration isolator on frame construction with fixed base and the influence of soil-structure dynamic interaction to frame structure with vibration isolator or not.At last, the paper summarized the whole contents, and put forward the further contents that would to be researched.
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