软土-桩-结构动力相互作用振动台模型试验研究

目的 分析探讨软土-桩-结构动力相互作用的机理．方法 通过软土-桩-结构相互作用体系和刚性地基上建筑结构两个振动台模型试验，研究了相互作用对结构的动力特性和地震反应的影响．结果 通过振动台试验得到了软土-桩-结构相互作用体系和刚性地基上结构体系的自振周期、阻尼比、加速度反应和位移反应曲线等．结论 结果表明，软土-桩-结构动力相互作用对结构的动力特性和地震反应有较大的影响：建筑结构自振频率减小，阻尼增大：在地震作用下，考虑相互作用的结构加速度、位移较基础固定的结构大．

Study on Shaking Table Model Test of Soft Soil-Pile Foundation-Superstructure Interaction System

In order to study the mechanism of Soil-Structure interaction by comparing the shaking table model test results of dynamic interaction system of soil and high structure with those of high structure on fixed base,the effects of Soil-Structure interaction(SSI)on dynamic characteristics and seismic responses are studied in this paper.Due to the effect of SSI,the natural frequency of the system in soft conditions is lower than that of structure on the fixed base and its damping ratio is higher than that of structure.When SSI is taken into consideration,the seismic responses such as acceleration and displacement are commonly lager than those of the structure on the fixed base.