Abstract :
Seismic isolation is a technique of reducing the response of structure against earthquake. Using this kind of building systems , leads to dissipation of the principal frequencies of the reduces the seismic energy during the earthquake .The direct effect of using this system is the reduction of earthquake load and the destruction of buildings. The main concern of this paper is to find out the effects of using horizontal diaphragm on the seismic isolators which are erected on the foundations. By nonlinear modeling and analysis of steel moment resisting frame and lateral bracing systems in structures with different stories, beneficial results regarding to behavior of the seismic isolation system are obtained. Results of this study show remarkable effects of the foundation diaphragms on the behaviors of the structures.
Keyword :
Seismic isolation, diaphragm, seismic energy dissipation.