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Abstract Modelling of soil-structure interaction (SSI) problem has always been a challenging topic for structural engineers. In the last half-century, several simplified modelling techniques have been proposed to consider SSI by idealizing the soil domain. The behaviour of these models is different in terms of complexity, accuracy, parameter definition and application cases. Thus, selecting a reasonably accurate and efficient model to simulate seismic soil-structure interaction is an essential issue for structural engineers. The current study makes an attempt to assess the performance of three simplified modelling techniques (Gazetas spring and dashpots, Cone model, and Beam on Nonlinear Winkler Foundation BNWF model) through a comparative study, which is conducted on nine reinforced concrete moment-resisting frame (MRF) structures with various structural height and widths supported by two different soil profiles. The seismic responses of the structures are investigated through a nonlinear time history analysis, and the performance of the models is compared in terms of capturing the period lengthening, lateral displacement, inter-story drift, and total base shear in the structures. The strengths, limitations and application cases of each model are also discussed. In addition, the influences of soil-structure interaction on the seismic response of MRF structures on soft soil deposits are investigated. Two main parameters (structure-to-soil stiffness ratio and structural slenderness ratio) are introduced, which have shown significant effects on controlling the role of SSI on building structures.
Bapir et al. (2024) studied this question.
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