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     方  志
    (合樂中國(guó)有限公司，上海200021)

[摘要] 在動(dòng)力有限元理論的基礎(chǔ)上，采用粘彈性人工動(dòng)力邊界模擬地基無(wú)限域的影響，建立了高層建筑-樁-土( SPSI)結(jié)構(gòu)體系的動(dòng)力計(jì)算模型，并編制了動(dòng)力有限元計(jì)算程序TPSPSIo對(duì)一12層框架結(jié)構(gòu)-樁-土體系的實(shí)例分析表明，采用粘彈性人工邊界的SPSI體系計(jì)算結(jié)果穩(wěn)定，地震反應(yīng)形態(tài)良好，并獲得了一些可供工程實(shí)踐參考的SPSI體系在地震作用下位移及內(nèi)力的變化規(guī)律。
[關(guān)鍵詞] SPSI；動(dòng)力分析；有限元；粘彈性；人工邊界；初始應(yīng)力；地震響應(yīng)

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