Physical random function model of ground motions for engineering purposes  

作　　者：WANG Ding LI Jie 

机构地区：[1]School of Civil Engineering, Tongji University, Shanghai 200092, China [2]State Key Laboratory of Disaster Reduction in Civil Engineering, Shanghai 200092, China

出　　处：《Science China(Technological Sciences)》2011年第1期175-182,共8页中国科学（技术科学英文版）

基　　金：supported by the Funds for Creative Research Groups of China (Grant No.50621062)

摘　　要：A physical random function model of ground motions for engineering purposes is presented with verification of sample level. Firstly,we derive the Fourier spectral transfer form of the solution to the definition problem,which describes the one-dimensional seismic wave field. Then based on the special models of the source,path and local site,the physical random function model of ground motions is obtained whose physical parameters are random variables. The superposition method of narrow-band harmonic wave groups is improved to synthesize ground motion samples. Finally,an application of this model to simulate ground motion records in 1995 Kobe earthquake is described. The resulting accelerograms have the frequencydomain and non-stationary characteristics that are in full agreement with the realistic ground motion records.

关 键 词：ground motion physical model random function narrow-band harmonic waves group non-stationarity 

分 类 号：TU352.11[建筑科学—结构工程] O4-4[理学—物理]