Determination of design response spectrum for important structures based on scenario earthquake

The determination of proper ground motion parameters is vital to the seismic safety analysis of important structures.In this paper,the problems and shortcomings of probability-consistent response spectrum based on probability seismic hazard analysis are discussed and a method for determining the design response spectrum is proposed.The method does not need seismic intensity conversion and uses the peak ground motion acceleration corresponding to the specific probability of seismic setting of site in consideration as basic input.The principles adopted are the maximum likelihood probability and the co-relationship of main fault of potential seismic source zone.Application of this method shows that it provides better results on design ground motion and site response spectrum parameters and is easy to be accepted by designers,at the same time it meets the requirements of seismic design.