中文摘要：

以我国中南地区为例，参考美国西部地震烈度、基岩峰值加速度、反应谱平均周期和谱光滑卓越周期的衰减规律，采用地震对映射的烈度震级法和烈度距离法，评估了研究区基岩峰值加速度和反应谱频率参数的不同衰减影响因素。

英文摘要：

Because of abundant earthquake motion records in Western America and isoseismal data in south Central China, we take south Central China as study area and Western America as referred area, use the earthquake-pair mapping methods （IM- and IR-mappings） to estimate various factors effecting the attenuations of peak ground acceleration and response spectral frequency parameters on rock sites in the study area.