رضا کرمی محمدی - استادیار دانشکده مهندسی عمران دانشگاه صنعتی خواجه نصیرالدین طوسی
پویا حیاتی - دانشجوی کارشناسی ارشد مهندسی زلزله

Base Isolation is a quite sensible control strategic design in reducing the response of a structural system induced by moderate and strong ground motion. Stiffness and damping are the most significant parameters in a base isolation system. The approach is based on lengthening the time period of the building. Additional flexibility that is required to increase the time period of the base-isolated building results in large displacement requiring large seismic gap at the isolation level . Amount of damping in isolation system plays very important role in controlling the structural response of the base-isolated building particularly the base displacement. The identification of effective parameters on behavior of base isolation is very important to designers. In this analytical study, the effect of significant parameters such as thickness, diameter and material properties of elastomeric layers is investigated, using FEM analyses by ABAQUS program. The outcomes could be included in optimal design of elastomeric layered isolators.

base isolation, Vertical stiffness