方  志
    (合乐中国有限公司，上海200021)

[摘要] 在动力有限元理论的基础上，采用粘弹性人工动力边界模拟地基无限域的影响，建立了高层建筑-桩-土( SPSI)结构体系的动力计算模型，并编制了动力有限元计算程序TPSPSIo对一12层框架结构-桩-土体系的实例分析表明，采用粘弹性人工边界的SPSI体系计算结果稳定，地震反应形态良好，并获得了一些可供工程实践参考的SPSI体系在地震作用下位移及内力的变化规律。
[关键词] SPSI；动力分析；有限元；粘弹性；人工边界；初始应力；地震响应

Dynamic analysis of SPSI system considering structure-foundation interaction
Fang Zlu
(Halcrow China Ltd., Shanghai 200021, China)

Abstract: Based on theory of dynamic finite element method, it presents a dynamic model of soif-pile-structure system with viscous-elastic artificial boundary to consider the influence of infinite extent of soil, and a dynamic FE calculating program named TPSPSI is achieved. With that program, it carried out a example calculation of 12-storey frame structure-pile-soil system and the results show that the dynamic responses of the system are good and steady with the viscous-elastic boundary, and some beneficial conclusions are obtained which could guide the structure design practice.
Keywords: soil-pile-structure interaction; dynamic analysis; finite element; viscous-elastic; artificial boundary; initial stress; seismic response