Dynamic soil-structure interaction analyses of a foundation system based on rigid inclusions

Abstract

Foundation systems based on rigid inclusions have become an economic and efficient means to control total and differential settlements and improve bearing capacity in soft ground. However, even though rigid inclusions are being used in areas of high seismicity, there is a significant lack of knowledge regarding their behavior under earthquake loading. Within this context, this paper presents the results of a number of two-dimensional numerical dynamic soil-structure interaction analyses, using the finite element method, to assess the performance of a structure founded on rigid inclusions. For comparison, a typical piled foundation was also analyzed, where the piles are structurally connected to the building. The obtained results provide significant insights into the seismic performance of the system, including the response of the surface structure and the magnitude and distribution of internal forces in the inclusions.