【摘要】 对9.21台湾集集地震主震的404组强震记录按照不同震中距和场地类别进行分组,然后对加速度水平分量和垂直分量的持时、峰值加速度、包络线、反应谱及其均方差作了统计分析。结果表明,场地条件对不同分量加速度某些特征的影响较为显著,断层方向对地震动水平特性也有一定的影响。该结果对地震危险性分析以及结构抗震验算有一定参考价值。此外,对地震动三分量包络线的研究为三维地震动模拟提供了一定参考。更多还原

【Abstract】 According to the epicentral distance and the site classification,we sorted 404 groups of strong motion recordings of the Chi-chi,Taiwan,China,main shock,and analyzed the statistic features of durations,peak accelerations,envelopes,response spectra and mean square deviations of horizontal and vertical acceleration components.The results indicate that the effect of site classification upon some component characteristics is relatively obvious;furthermore,the direction of fault also has some influence upon horizontal component of ground motion.This result can offer reference for seismic risk analysis and structural aseismic checking computation.In addition,the results from the research on three component envelopes of ground motion can give some reference for 3D ground motion simulation.更多还原