ANALYSIS OF THE DEFORMATION DISTRIBUTION IN THE SYSTEM DEPENDING ON THE YIELD DEFORMATION

Abstract

We study the response of nonlinear soil – linear foundation – linear building system to pulse-like wave with arbitrary incidence. The soil is assumed as ideally elastoplastic material where the nonlinear property of the material is defined by the yielding strain . Depending on the yielding strain, the soil responds to external excitation on linear or nonlinear manner. As the yielding strain is lower larger permanent strains occur during the soil response. The creation and development of these strains spent energy carried by the wave, so less energy entering the building. On this way, the nonlinear soil response acts as a passive base isolator, i.e. smaller yielding strain, larger nonlinear soil response, smaller amount of seismic energy entering the building.