Abstract
ABSTRACT Due to soil -structure-interaction (SSI), the seismic lateral structural deformations may be substantially different from the ones traditionally calculated from the fixed-base structure on free-field approach. Additionally, the actual displacements of foundations considering soil compliance are of practical interest in some applications. In the present study, seismic elastic displacement demand of compliant coupled soil- structure (SFS) systems, is investigated through numerical time history analyses. The numerical displacement demand is validated through an analytical solution, comparison between FEM and analytical solution is provided and finally, a practical, simplified approach for displacement evaluation is proposed. The displacements are presented in terms of dimensionless parameters such as soil to structure stiffness ratio 1/σ and slenderness ratio h/B, while closed-form relationships are proposed.
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