建筑抗震设计规范中场地类别划分的进展分析

Analysis of the Progress of Site Classification Methods in Building Seismic Design Codes

分析了我国《建筑抗震设计规范》GBJ11—89,GB 50011—2001和GB50011—2010在场地类别划分参数指标方面的进展与更新,讨论了它们在使用过程中可能存在的一些问题,并分别按其各自的场地类别的划分方法,计算了收集的176个实测剪切波速的钻孔资料,得出了其场地类别的分布情况。对比分析发现,2010规范与2001规范相比,场地类别划分的情况基本一致,即Ⅰ,Ⅱ类场地的范围无变化,Ⅲ,Ⅳ类场地的范围略有变化;与1989规范相比,变化较大,Ⅰ,Ⅱ类场地的范围约有10.0%的减小,Ⅲ类场地的范围有36.6%的增大,Ⅳ类场地的范围有14.3%的减小。

The progress of Site Classification Methods in Codes for Seismic Design of Building （ GBJ11 - 89, GB50011-2001 and GB50011-2010） has been analyzed. Some problems in the course of usage are discussed. From the collected and settled data calculated from the 176 boreholes through shear wave velocity measurement , we have obtained the distribution of the other site classification. Found from the comparison and analysis, we can say that compared with 2001 codes, the situation specified in 2010 codes is basically the same as that in 2001 codes, namely Class Ⅰand Ⅱ site range have unchanged, and Class Ⅲ and Ⅳ site range have slightly changed; compared with 1989 codes, the changes specified in them are larger, namely, the ranges of Class Ⅰ and Ⅱ sites have reduced more than 10.0 % , and Class Ⅲ sites have increased by 36.6 %, and the range of Class Ⅳ has decreased by 14. 3 %.