The effects of soil-structure interaction (SSI) on the seismic response of different types of structures has been thoroughly investigated in the past 4 decades. Yet, the phenomenon of structure-soil-structure interaction (SSSI) was often overlooked. The present study aims at the rigorous investigation of the interacting effects of adjacent buildings in a two dimensional setting. The soil medium was assumed as a viscoelastic half-space modeled using plane strain finite elements. The aforementioned unbounded half-space is simulated utilizing the state-of-the-art perfectly matched layers implemented in the finite element method (FEM). The problem of the SSSI is solved in frequency domain. In order to fully model the stories below the ground level for the case of high-rise buildings, special modifications were considered for the interaction of the structure and the soil medium due to presence of spatially varying ground motion on the boundary of excavated region. The effect of different parameters such as foundation moduli and distance between adjacent buildings were investigated and the results were compared with models built using the conventional rigid foundation assumption. The results of the study showed that the interacting effects of adjacent building are prominent and need to be considered in the seismic design of buildings.

中文翻译：

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地震荷载作用下相邻建筑物的结构-土-结构相互作用

在过去的 4 年中，已经彻底研究了土 - 结构相互作用 (SSI) 对不同类型结构的地震响应的影响。然而，结构-土壤-结构相互作用（SSSI）现象经常被忽视。本研究旨在对二维环境中相邻建筑物的相互作用影响进行严格调查。土壤介质被假定为使用平面应变有限元建模的粘弹性半空间。前面提到的无界半空间是利用在有限元方法 (FEM) 中实现的最先进的完美匹配层来模拟的。在频域中解决了SSSI的问题。为了在高层建筑的情况下对地平面以下的楼层进行全面建模，由于挖掘区域边界上存在空间变化的地面运动，因此考虑对结构和土壤介质的相互作用进行特殊修改。研究了基础模量和相邻建筑物之间的距离等不同参数的影响，并将结果与​​使用传统刚性基础假设建立的模型进行了比较。研究结果表明，相邻建筑物的相互作用效应突出，需要在建筑物的抗震设计中加以考虑。研究了基础模量和相邻建筑物之间的距离等不同参数的影响，并将结果与​​使用传统刚性基础假设建立的模型进行了比较。研究结果表明，相邻建筑物的相互作用效应突出，需要在建筑物的抗震设计中加以考虑。研究了基础模量和相邻建筑物之间的距离等不同参数的影响，并将结果与​​使用传统刚性基础假设建立的模型进行了比较。研究结果表明，相邻建筑物的相互作用效应突出，需要在建筑物的抗震设计中加以考虑。