中外抗震设计规范场地分类对应关系

Site Classification Corresponding Relationship Between Chinese and the Overseas Seismic Design Codes

我国强震观测台站数量及强震观测数据均较少,目前我国地震动研究多选用美国等国家和台湾地区的强震数据。然而,我国与国外及台湾地区抗震设计规范中场地分类的差异,直接妨碍和影响了对国外和台湾地区强震数据的利用。本文通过收集美国等国家和台湾地区的235个台站场地的详细勘探资料,对比我国与美国等国家及台湾地区的抗震设计规范中场地分类指标,找出了我国与美国等国家和台湾地区抗震规范场地分类指标间的关系,即根据地下30 m深度范围内的等效剪切波速,按照01抗震规范进行场地分类,以利于我国利用国外和台湾地区强震数据进行地震动研究。

As a result of few stations and limited observation data of strong motion in China,most data for current seismic research is originated from the USA and other countries and regions.However,the existing deviation of classifying site on seismic design code between China and foreign countries directly hampers the use of strong-motion data from other countries and regions.Based on collecting detailed prospection data from the 235 station sites of four countries and regions including the USA,contrasting and analyzing site classification indices on seismic design code of China and the USA,as well as other countries and regions,it is found that the relations between China and the USA regarding site classification index in the seismic design codes,as well as other countries and regions.It is useful that the sites are classified under 01 seismic code according to the equivalent shear wave velocity′s Vs30 value within the depth of 30m belowground for seismic research in China by using strong-motion data from other countries and regions.