Artificial Ground Motions Compatible with Both Specified Peak Displacement and Target Response Spectrum

This paper proposed an artificial ground motion simulating method,which may be used to generate the artificial seismic ground shaking time history that satisfies both the target absolute acceleration response spectrum and the target peak ground displacement.Firstly,the method utilizes the traditional method,which modifies the Fourier amplitude spectrum in the frequency domain,to generate the initial acceleration time history,a（t）,with the given peak ground acceleration（A_PG）,response spectrum S_T（ω,ζ）,and intensity envelope being prescribed as targets;and then through superimposing the narrow-band time history in the time domain,the method further modulates a（t） to make its peak displacement approach the target peak ground displacement,i.e.,D_PG^T,as well as to improve its fitting precision to the target response spectrum.The numerical examples demonstrates that the results obtained by this proposed algorithm possess are with very high fitting precision.