Regional seismic damage analysis of building clusters based on time history analysis enables damage evolution and distribution to be obtained for structural performance evaluation, seismic loss estimation, and post-earthquake emergency response decision support. Soil–structure cluster interaction (SSCI) effects have been shown to affect significantly seismic damage to buildings due to the influence of neighboring buildings through underlying soils. However, SSCI effects in current regional seismic damage simulations are either ignored or obtained with exceptionally high computation cost due to the common discretization of large scale soil domains using finite elements. To this end, lumped parameter models (LPMs) are presented in this work as a simple effective tool for regional seismic damage simulation of SSCI systems, which is particularly useful for parametric analysis and also enables fast regional damage assessments. The LPMs combine story-based multiple-degree-of-freedom buildings with ‘foundation springs’ that are used to represent soil–foundation interaction and foundation–soil–foundation interaction. Seismic damage analysis of 320 buildings on Wangjiang campus of Sichuan University in China is used as a case study. The results of the specific case study show, that in most cases, SSCI effects result in lower damage to buildings, especially on soft soils. However, the SSCI effects may lead to higher structural damage to buildings in some cases, e.g. those on stiff soils. The results also show that using nominal inter-story drift ratio which includes foundation rocking rotation as the damage index may underestimate story seismic damage to lower stories of tall buildings.

基于时程分析的建筑群区域地震损伤分析，可以得到损伤演化和分布，为结构性能评价、地震损失估计和震后应急响应决策提供支持。由于相邻建筑物通过下伏土壤的影响，土壤-结构集群相互作用 (SSCI) 效应已被证明会显着影响建筑物的地震破坏。然而，由于使用有限元对大规模土壤域进行普遍离散，当前区域地震损伤模拟中的 SSCI 效应要么被忽略，要么以极高的计算成本获得。为此，在这项工作中提出了集总参数模型 (LPM) 作为 SSCI 系统区域地震损伤模拟的简单有效工具，这对于参数分析特别有用，并且还可以实现快速的区域损坏评估。LPM 将基于楼层的多自由度建筑与“地基弹簧”相结合，用于表示土-地基相互作用和地基-土-地基相互作用。以四川大学望江校区320栋建筑的震害分析为例。具体案例研究的结果表明，在大多数情况下，SSCI 效应对建筑物的破坏较小，尤其是在软土上。然而，在某些情况下，SSCI 效应可能会对建筑物造成更高的结构损坏，例如在坚硬的土壤上。