Simplified Model for Nonlinear Frequency-dependent Soil with Shallow Foundation

Abstract

This thesis introduces a new approach to seismic Soil-Structure Interaction (SSI) analysis method for shallow foundation using simplified models. The study is inspired by the increasing number of interest amongst engineers and researchers in the nonlinear behavior of shallow foundation as the behavior is unavoidable. The conventional methods of capturing this phenomenon includes a detailed Finite Element Method (FEM) model. However, due to large computational effort in modeling and analysis, it is not a feasible option in the current practice. In this thesis, a method is proposed where macro element for static inelastic behavior and a recursive parameter model for frequency-dependent dynamic characteristics of soil-foundation system are integrated. The proposed method is verified in the two dimensional parametric space of frequency and inelasticity. Then, a practical application example of the proposed modelling method is presented.