Abstract
In the paper a modified lumped parameter model for nonlinear soil-structure interaction (SSI) analysis is described, in which the nonlinearities associated with the inelastic soil behavior and the uplift of the rectangular foundation from surrounding soil are properly accounted for. In order to verify the simplified analysis model two types of model tests had been performed. Finally, the simplified analysis model is applied to the nonlinear response analysis of the SSI under seismic and air-blast loading conditions.
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