【摘要】 通过对陇东黄土高原区地质构造环境、历史地震影响与破坏特征、概率地震危险性计算等几方面的研究,对该区地震动参数特征进行了分析,研究了该区黄土场地及地形地貌对地震动参数的放大效应与分区特征。研究表明,陇东黄土高原地区的地震影响主要来自中远距离的大震,地震动持续时间长,长周期部分相对丰富,黄土场地及地形对地震动具有明显的放大效应,地震动参数具有明显的地貌分区特性。最后对比地震动参数区划图给出了陇东黄土高原地区建筑抗震设防参数的一些建议,认为在抗震设防参数取值中适当提高特征周期,对峰值加速度则按地貌分区取值。更多还原

【Abstract】 The feature of earthquake ground motion parameters of loess plateau in the eastern Gansu province are analyzed on the basis of geological tectonic environment,historic earthquake influence,building damaging features and earthquake risk probability calculation.The amplification factor and landform zoning of the seismic parameters are studied by the seismic response analysis of loess site and topography characters.The research shows that the earthquake impact is mainly caused by strong earthquake from long distance and the earthquake duration time of ground motion is longer in which the long-period component is abundant.The thick loess and landform have significant amplification to the earthquake ground motion and the seismic parameters have landform zoning behavior.Comparison with the seismic ground motion parameter zonation map,some suggestions to the seismic fortification parameters are proposed for the loess plateau in eastern Gansu province.更多还原