中国欧洲美国抗震设计规范场地分类对比研究

Comparative Study on Site Classification between Chinese,European and American Codes of Seismic Design

在抗震设计场地分类方法上,国内外以及不同行业(如建筑、铁路、公路、水电等)之间存在较大差异。为进一步探讨我国现行抗震设计规范中工程场地分类方法的优劣,通过归纳和对比,深入分析中、欧、美多个行业抗震设计规范中工程场地分类的标准和方法,对场地分类指标、分类数目、剪切波速计算方法、起始面和计算深度、覆盖层厚度和分类方法的适用性进行了分析。结果表明,国内的各种抗震设计规范中场地分类方法应适当考虑标准贯入试验锤击数和不排水剪切强度等指标,可进一步细化可液化土和高黏性土等特殊场地分类。

In the sites classification method of seismic design, there are large differences between domestic and foreign regulations and among different industries (such as construction, railway, highway, hydropower, etc.). In order to further explore the advantages and disadvantages of the engineering site classification method in China's current seismic design codes, through inductive and contrast depth analysis of the standards and methods of engineering site classification in seismic design codes of various industries in China, Europe and the United States, classification index and number , shear wave velocity calculation method, starting surface and calculated depth, overburden thickness and applicability of the classification method were analyzed. The results show that the site classification method in various seismic design codes in China should properly consider the blow count of standard penetration test, undrained shear strength and other indicators, which can further refine the classification of special sites such as liquefiable soil and high-viscosity soil.