土-结构群相互作用体系地震响应振动台试验研究

设计并开展一系列土-结构群相互作用体系振动台试验，考虑结构数量、地震动类型与幅值等参数，研究土-结构群相互作用对结构及场地土响应的影响，并对模型土参数确定方法进行分析。研究结果表明，地表建筑物的存在并不总是减小自由场地面运动，但地面运动随着地表结构数量的增加而降低；土-结构群相互作用对位于结构群中心的结构响应影响最大，且会放大土体卓越频率附近的响应成分；不同评价指标之间具有不同的侧重点，但均可较好地评价结构群之间的相互作用；输入地震动的总能量越高，土-结构群相互作用越明显。

Shaking Table Test Study on Seismic Response of Soil-structure Cluster Interaction System

A series of shaking table tests of soil-structure (group) interaction systems are designed and implemented in the paper, the parameters such as the number of structures, and the type and amplitude of ground motion are considered to explore the influence of the SSCI effect on the structure and site soil response. And the methods to determine model soil parameters are discussed. The comparative analysis based on the test results shows that: (1) the existence of surface buildings does not always reduce the ground motion of the free field, but the ground motion decreases with the increase of the number of surface structures. (2) The SSCI effect has the greatest impact on the structural response at the center of the structure group, and it also will amplify the response components near the predominant frequency of the soil. (3) Different evaluation indicators have different emphases, However, they both can evaluate the interaction between structural groups well; (4) the higher the total energy of the input ground motion, the more obvious the SSCI effect.