Abstract Soil-structure interaction (SSI) phenomena subjected to seismic loadings are investigated in this study. Firstly, shaking table tests on dynamic soil‐structure interaction subjected to seismic loadings are carried out, and SSI effects are analyzed through a comparative study between the soil-structure system and the rigid foundation condition. Then, a corresponding numerical model on the SSI tests is presented. In the finite element model, a bounding surface plasticity model and an equivalent linear method are separately used for simulating the nonlinear behavior of soil. It turns out that the calculated results by the bounding surface plasticity model agree much better with the experimental results. Finally, the effects of different soil types and structural properties on soil-structure interaction are discussed by numerical parametric study. The results show that SSI effects noticeably mitigate the dynamic response of structure, and the closer the frequency of superstructure to the soil frequency, the more obvious the effect of soil-structure interaction. With increased shear wave velocity of soil, the impact of soil-structure interaction weakens. It is important for studying the impact of SSI on structural responses and practical engineering design purposes.

中文翻译：

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地震激发下土-结构动力相互作用试验研究与数值模拟

摘要 本研究对地震荷载作用下的土-结构相互作用（SSI）现象进行了研究。首先，进行了地震荷载作用下动态土-结构相互作用的振动台试验，通过土-结构体系与刚性地基条件的对比研究，分析了SSI效应。然后，介绍了 SSI 测试的相应数值模型。在有限元模型中，分别采用边界面塑性模型和等效线性方法来模拟土的非线性行为。结果表明，边界面塑性模型的计算结果与实验结果吻合得更好。最后，通过数值参数研究讨论了不同土壤类型和结构特性对土壤-结构相互作用的影响。结果表明，SSI效应显着减轻了结构的动力响应，上部结构的频率越接近土的频率，土-结构相互作用的影响越明显。随着土壤剪切波速度的增加，土壤-结构相互作用的影响减弱。这对于研究 SSI 对结构响应和实际工程设计目的的影响很重要。土-结构相互作用的影响减弱。这对于研究 SSI 对结构响应和实际工程设计目的的影响很重要。土-结构相互作用的影响减弱。这对于研究 SSI 对结构响应和实际工程设计目的的影响很重要。