An applied method for analysis of nonlinear seismic response of layered soil deposit

Abstract

The available methods of Seismic ground response analysis including equivalent linear and nonlinear methods perform the analysis in the time or frequency domain. Nonlinear methods usually provide accurate results however, these methods are usually time-consuming because of their step by step integration procedure in time domain. On the other hand, simplicity, flexibility and less computational effort are the advantages of the frequency domain methods. Therefore, in this paper seismic response of layered soil deposits is performed by hybrid frequency-time domain procedure. The soil deposit is modeled as a discrete system composed of a finite number of lumped masses connected by springs and dashpots. A seismic motion is applied to the system at the base level. Pseudo-forces are applied to the system in a rational iterative procedure in the time domain to evaluate the nonlinear soil behavior. This paper presents an applied method of the nonlinear seismic ground response analysis without the need for more inp...