In the dynamic analysis of structures, neglecting the effect of Soil Structure Interaction (SSI) is not always justified. Critical and monumental facilities, as well as facilities equipped with sensitive instruments are demanding detailed analysis of their interaction with the environment.
Soil Structure Interaction (SSI)
The SSI analysis involves the soil and the structure model. Regarding the distinct nature of the models, classical approach of solving SSI problems is based on substructuring techniques. The domain is decomposed in two subdomains: the unbounded domain - soil, and the bounded domain - structure. The subdomains are modeled separately. The interaction is realized through the compatibility of the boundaries that reside in the interface between the subdomains.
Direct approach vs Substructuring approach
The SSI analysis could be reduced to the Soil Foundation Interaction (SFI) analysis. The aim is to find the dynamic stiffness of the foundation-soil system that could be assembled into the dynamic stiffness of the structure.
This research topic is focused on investigating the SFI problems using analytical solutions. The Integral Transform Method is used for soil modeling. The Dynamic Stiffness Method is used for the foundation modeling.
