PROBABILITY DENSITY EVOLUTION METHOD AND PSEUDO EXCITATION METHOD FOR RANDOM SEISMIC RESPONSE ANALYSIS
Comparison between the probability density evolution method (PDEM) and the pseudo excitation method (PEM) is addressed in the present paper. The stochastic dynamic responses of a single-degree-of-freedom system subject to stochastic ground motions are investigated. The PDEM is applied and reveals that the response of the system is non-stationary due to the nonstationary nature of the earthquake motion. On the other hand, the numerical solution of the PEM is an asymptotical stationary process with the non- stationary initial effect, whereas the analytical solution of PEM is a stationary process because the excitation is viewed as a stationary process by FFT. In addition, the solutions of PEM are further explored to the system excited by non-stationary ground motion. The results show that the PDEM is more reasonable than the PEM in the random seismic response analysis due to the present FFT being a total-time transform technology and hard to dispose of the energy non-stationary distribution of ground motion against frequency.
Probability density evolution method pseudo excitation method physical random ground motion model non-stationary initial effect FFT spectral window function
Y. B. Peng J. B. Chen J. Li
School of Civil Engineering, Tongji University, Shanghai, China
国际会议
上海
英文
462-471
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）