The influence of the dynamic interaction of the structure-foundation system was considered. The structure-foundation dynamic analysis mode of the high-rise building with pile- raft foundation was improved. The method was presented to calculate the dynamical characteristic and internal force of the structure with the horizontal earthquake action quantitatively. By taking into account the interaction of the structure foundation system,a numerical example was used to analyze the dynamical characteristic and internal force of the structure with the influence of the parameters, such as the dynamic stiffness of the pile foundation system and the quality change of the soil that participates in the vibration around the pile head. Results show that the method can be used to calculate the dynamical characteristic and internal force of the structure quantitatively, and to reflect the actual influence,thus having great importance in practice.%针对结构与地基体系动力相互作用的影响,改进了高层建筑采用桩筏基础时结构-地基体系动力分析模型；提出了在水平地震作用下定量计算结构振动特性及内力的方法；通过算例分析了考虑结构-地基体系共同作用时,桩基体系动刚度及桩头部位参振土质量的取值变化对结构振动特性及内力的影响,以期定量计算结构振动特性及其内力变化,真实反映结构-地基体系动力相互作用的影响.
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