【摘要】 文章搜集了美国西部近几年场地钻孔资料和近几年的强震记录,根据钻孔资料把强震记录按照我国《建筑抗震设计规范》(GB 50011-2010)中的规定进行场地分类,利用这些强震记录建立了适合我国场地的地震动峰值衰减关系。在衰减关系模型中考虑到了震级饱和和近场距离饱和特性,统计得到了Ⅰ、Ⅱ、Ⅲ类场地的地震动峰值加速度的衰减关系并分析了其特点。通过将Ⅰ类场地地震动PGA的衰减关系和其他研究的基岩场地衰减关系对比,可以看出第Ⅰ类场地得到的水平与竖向PGA衰减曲线和其他研究的基本一致。由此说明只要场地分类相同,使用各地区同类场地的强震记录进行地震动参数研究是可行的。研究结果为我国各类场地的PGA的估计提供了依据。更多还原

【Abstract】 The boring data and strong motion records in the western United States in recent years are collected,and the strong motion records with boring data are classified by the criterion in the Code for Seismic Design of Building(GB 50011-2010) in China.Then the attenuation relation of peak ground motion is established by the simulation based on strong motion records,which are suitable for China.The saturation of ground motions near the epicenter with respect to both magnitude and distance is also emphasized in the attenuation models,the attenuation relation of peak ground acceleration(PGA) in sites category Ⅰ,Ⅱ and Ⅲ is obtained and its characters are analyzed.Compared with the studies of the attenuation relation of the rock sites,it is found that the horizontal and vertical PGA attenuation curve in site category Ⅰ is in basic accordance with other researchers’ results.So as long as the category of site is the same,studying the ground motion parameter by using strong motion records in different areas is feasible.The study provides a basis for the estimation of the PGA on various sites in China.更多还原