A NEW APPROACH TO RIGOROUS MODELING OF SSI

Various methods of analysis have been proposed to inspect the effects of the underlying soil on structural responses in the existence of dynamic loads. Finite elements are usable when effects of ground half-space infinite radiation are not of interest, i.e. the problem is of static or quasi-static nature. To make the solution more precise, hybrid schemes may be used taking into account effects of the near-field and the far-field. The nonlinear behaviour of the underlying soil especially the region engulfing the foundation may have substantial effects on stories displacements. In this study, finite elements have been used to model structural as well as near-field soil elements and the Scaled Boundary Finite Element Method is used for the far-field. The near-field soil is supposed to react nonlinearly via inserting a constitutive model in the elements. The main purpose is to introduce a newly growing solution method for the inspection of soil-structure interaction (SSI). Results are verified with those derived from previous methods of analysis.

Keywords:

Soil-Structure Interaction , Finite Element Model , Scaled Boundary Finite Element Model , Truncated Far-Field , Near-Field