A NEW RANDOM MODEL OF EARTHQUAKE MOTION CONSIDERING STOCHASTIC PHYSICAL PROCESS
In this paper, a new approach is proposed to reflect the intrinsical mechanics of seismic uncertainty. According to the modelling by mechanism, the proposed model is targeted to establish a physical relation between random earthquake motion with key random parameters including the input spectral parameter, the natural angular frequency and the damping ratio of engineering ground. Using random Fourier spectrum as model function, the probability configuration of seismic motion is obtained simultaneously. With numerical method, a large number of actual records of different sites are analyzed to identify the probability distribution of previous basic random parameters. Compared with actual seismic records, the proposed model is approved of propriety to externalize the variability of earthquake ground motions.
Earthquake motion model stochastic process random variables fourier spectrum
J. Li X. Q. Ai
Department of Building Engineering, Tongji University, Shanghai, China Shanghai Institute of Disaster Prevention and Relief, Tongji University, Shanghai, China
国际会议
上海
英文
1198-1204
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）