Analysis of structures under seismic load by the time history method taking into account the nonlinear interaction of soil – structure

Abstract

ABSTRACT:
The paper presents a new model in analyzing the structure under earthquake by the time history method. Acceleration of a real earthquake Elcentro (1940) was used to directly analyze the behavior of structures. In addition, nonlinear behavior in the soil - structure interaction has been considered through the Py, Tz, M curve method, respectively describing the nonlinear relationship between horizontal load - horizontal displacement, vertical load - vertical displacement and bending moment - angle of rotation of the foundation system. The results of the analysis of the structural work of the new model are compared with the respond spectrum method and time history in case the column foot is considered to be the mount link to the ground, showing that when the simulation is approximate the real work of the construction, the behavior of the structure has changed quite markedly. The research can be considered as the first step in providing an approximate simulation model of the actual work of the building in a discrete model, helping design engineers to simulate the work of structural works without spending a lot of time building models.

Keywords: Py Tz M curve method, structure analysis, seismic load, time history method.