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中文摘要：
采用简化桩模型和多分段杆单元模型来模拟独立桩承框架结构．对一幢七层独立桩承钢筋混凝土框架结构进行了考虑与不考虑土-结构相互作用效应影响的结构自振特性对比分析．然后依次输入9条地震波加速度记录，对结构进行了考虑与不考虑土-结构相互作用效应影响的地震反应时程分析．由大量的数值分析结果总结了土-结构相互作用对结构地震反应的影响规律，并用算例对部分结论进行验证．
英文摘要：
Simplified pile model and multi-segment beam element model were adopted to simulate frames supported by some isolated piles. The free vibration characteristics of a seven-story reinforced concrete（RC） frame supported by some isolated piles were studied. And then nine earthquake acceleration records were put in and the soil-structure interaction（SSI） responses were analyzed by time history analysis method respectively with and without the consideration of the soil-structure interaction effect. Finally, the laws of SSI effect on structural seismic response were summarized based on a large number of numerical analysis results, and the reliability of some of the conclusions was proved by numerical examples.
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