地震学报Issue(4)：698-710,13.DOI:10.3969/j.issn.0253-3782.2014.04.015
随机有限断层法模拟中强地震近场强震动的参数影响研究
Effect of parameters on near-fault ground-motion simulations for moderate-strong earthquakes by stochastic finite-fault method
摘要
Abstract
This paper described stochastic finite-fault method and related im-provements which have been widely used in simulating acceleration time histo-ries.The improved method is more suitable for the simulation of moderate-strong earthquakes.And then we compared the time histories and average PSA (pseudo-acceleration response spectra ) of near-fault moderate-strong earth-quakes for different site azimuths so as to analyze parametric sensitivity quanti-tatively to near-fault ground-motion simulations for moderate-strong earth-quakes using the revised program.The results show that PSA values are appar-enly different at short period for different site azimuths,and stress drop is the most important model parameter,which controls response spectra at short peri-od.In addition,the geometric-spreading coefficient has a significant impact on PSA.Therefore,in order to get more accurate simulations for the near-fault moderate-strong earthquakes we should focus on stress drop and geometric-spreading coefficient which have great influence on PSA values at short period when applying stochastic finite-fault method to the seismic safety evaluation of moderate earthquakes.And the distribution of dominating site azimuths is an-other factor which should also be considered in this situation.关键词
随机有限断层法/近场/中强地震/参数敏感性Key words
stochastic finite-fault method/near field/moderate-strong earth-quake/parametric sensitivity分类
天文与地球科学引用本文复制引用
高阳,潘华,汪素云..随机有限断层法模拟中强地震近场强震动的参数影响研究[J].地震学报,2014,(4):698-710,13.基金项目
大型先进压水堆核电站国家科技重大专项（2011ZX06002-010）资助． （）
