Effect of pounding in seismic demand of seismic isolated structures

In this paper, the results of study on seismic isolated buildings and effects of seismic gaps between such buildings and adjacent buildings during earthquake have been presented. The importance of this study can be explained as, the results can be use to evaluate the effects of seismic gap between structures which are subject to earthquake. Statistic information has been obtained by analyzing buildings with three, five and seven stories that were subjected to 20 earthquake records. Gaps among buildings changed based on characteristic of them with base isolation system; it can give us a better point. Each of structures was analyzed under the selected records and it was investigated effect of impact between them during earthquake on seismic demands. In addition for studying effects of pounding on seismic demand in structures with base isolated system, 540 nonlinear time history analysis was performed. At the end we suggested a simple and effective equation that can reduce effects of pounding on adjacent buildings