Methods of calibrating seismic design response spectrum

Seismic design response spectrum is the basis of structural seismic design.Calibration of the seismic design response spectrum is the main chain of determining structures' seismic input.The basic theory and several methods of determining design response spectrum are summarized,the calibrating methods of the seismic design response spectrum in our country are introduced,the present studied state of Uniform Seismic Design Spectrum and its application foreground are discussed,then the problems of every method are pointed out and the problems which worth more research in future are provided.