Study on parameters of Clough-Penzien seismic random model corresponding to respome spectrum of GB50011-2001

A study on the parameters of Clough-Penzien seismic random model based on the response spectrum in the GB50011-2001 is carried out.The non-stationary nature of the ground motion is considered by the envelope function.It is found that S0 can be determined by the equivalence principle of peak ground acceleration.The results show that S0 is not only related to ground acceleration and site condition but also to structural dynamic property(damping ratio,natural vibration period)as well.Ultimately,a simplified method for calculating S0 is carried out.The parameters given in this study provide a theoretical fundamental for stochastic seismic response analysis of structures.