分析了大量现有的共同作用理论，分别整理了上部结构、筏板与桩土的分析模式。
The theories of interaction are summarized and analytical models of raft, pile-soil and superstructure are settled respectively.
研究结果表明，考虑地基土、砂砾石垫层、上部结构共同作用时，结构的基本频率明显减小，相应的基本周期明显延长；
The results shows that the fundamental frequency of the model which takes the combined activate into consideration reduced evidently, and the fundamental period prolonged evidently.
但事实上，地基土与结构是共同作用的，在动力荷载作用下，两者的协同工作也被广大的设计人员接受。
But actually, the soil works together with the structure, and the cooperation of the two under dynamic loads is widely accepted by designers.
研究工作可为土—结构共同作用相关问题的研究提供参考。
The works of this paper belong to fundamental study and can provide necessary reference for the relevant study of SSI effect.
本文提出了分析土-基础-结构共同作用问题的一种新的模型，使土-基础介面条件得到了比较简洁而且统一的处理，在IBM个人计算机上开发了相应问题的分析程序。
This paper proposes a new model to analyse soil-foundation-structure interaction problems. The interface conditions between soil and foundation are consistently and concisely dealt with in the model.
本文提出了分析土-基础-结构共同作用问题的一种新的模型，使土-基础介面条件得到了比较简洁而且统一的处理，在IBM个人计算机上开发了相应问题的分析程序。
This paper proposes a new model to analyse soil-foundation-structure interaction problems. The interface conditions between soil and foundation are consistently and concisely dealt with in the model.
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