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《Chinese Journal of Geophysics》 2007-03
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Study on the ground motion of scenario earthquake using stochastic simulation method

JIANG Hui~ 1,2 , HU Yu-Xian~2, ZHAO Feng-Xin~2,YU Yan-Xiang~2,TANG Li-Hua~31 Earthquake Administration of Guangdong, Guangzhou 510070, China2 Institute of Geophysics, China Earthquake Administration, Beijing 100081,China3 Earthquake Administration of Xinjiang, rümqi 830011, China  
Studying the ground motions of scenario earthquake using stochastic simulation method needs two steps.(1)Using digital seismic data of small-moderate earthquake to study the parameters of path and site. (2)Applying the determined parameters to stochastic simulation of ground motion. For that, we firstly use a feasible method to separate the site effect of soft rock and the anelastic attenuation of path. The average site effect of soft rock in the northern part of the research region reaches 1.5 or so in 2~4Hz. The S wave quality factor of the research region is obtained as Q_S=278f~ 0.346 . Secondly, we apply these parameters to the model of site and path in the region, and choose source spectrum of single corner frequency. Then, we simulate the possible ground motions of the middle area of Northern Tianshan from future moderate-strong earthquakes in the research region. The resultant acceleration histories and spectra of ground motions may serve for evaluating earthquake disaster and checking the reliability of buildings in this region.
【Fund】: 国家自然科学基金项目(50468003);; 国家973项目(2002CB412706)联合资助
【CateGory Index】: P315
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