Base Isolated Structure Parameters Of The Isolation System Optimization Study

This dissertation is concerned to the base-isolated structures with bilinear restored forcemodel. At first, Analghcal solutions are derived for the dynamic characteristics of based-isolatedshear building. A series of parameters studies is carried out and the effects of varying the stiffessand mass of the base-isolation system on the frequencies and mede shapes are identified.According to the characteristic of response of the base-isolated fores, adapting the bilinearrestored force model, the MOF shear type elastic-plastic step-by-step integration program iscompiled. Through the different parameters of bilinear seismic isolation devices are combined, onthe basis of a lot of step-by-step integration analyis, the optimal range of parameters areobtained.At last, combined with the corent seismic design code, the equivalent lateral force methodis proposed.