Nonlinear Dynamic Analysis of Lumped Soil Mass Model against Seismic Loading

Abstract

Soil yielding mechanisms and seismic load responses are the key areas of study. The true behavior of soil is revealed by nonlinear analysis. A clump of dirt is used for the analysis. In this study, the Finite Element Model (FEM) forms the basis for the mathematical formulas. Soil analysis in the case of a lumped mass takes into account the soil's one DOF, two DOF, and multi DOF degrees of freedom. In order to determine soil characteristics for MDOF, a soil bore log must be employed. In the instance of MDOF, the soil is composed of 12 distinct layers. SAP 2000 is used to conduct a nonlinear time-history analysis for this research. The hysteresis loops of nonlinear elastic, completely flexible soil undergo permanent deformation. Therefore, it is possible to get insight into the behavior of soil mass during an earthquake by studying lumped soil mass. The soil's nonlinear behavior is investigated using a variety of linear completely plastic hysteretic loops. Soil characteristics are shown to be crucial in this regard. Inadequate soil stiffness may result in persistent deformation, which in turn can lead structures to lean out of alignment. It is also noted that near the soil's surface, amplification is greatest.