Ricerc@Sapienza

This paper presents a displacement-based design procedure to rationally account for
the effects of soil-foundation structure interaction in the seismic design of shallow
foundations. The non-linear deformations at the soil-foundation interface, such as
foundation uplift, soil yield and soil-foundation shear deformation can dramatically alter
the dynamic response of a building. The lack of consideration of the modifying factors
of SFSI and an absence of procedures for controlling foundation and soil behaviour

This paper illustrates an original and simple method to predict earthquake-induced deformations of geotechnical systems. The method is an extension of static non-linear analysis, and is conceived to predict the behaviour of geotechnical systems, like supported and unsupported excavations, that during the seismic motion accumulate displacements in a single direction. The seismic capacity of the system is described by its capacity curve, obtained either from a numerical push-over analysis or through a simplified procedure.