中美欧建筑抗震设计规范对比

Comparative of Seismic Design Codes for Buildings Among China,the US and Europe

中国、美国和欧洲3大国际主流建筑抗震规范存在较大差异.论文对比分析了3种规范的设计原则、设计原理以及设计参数取值的异同.结果 表明,在分类原则、参数确定方法以及参数取值上存在差异:中国、美国、欧州在抗震设防类别方面均分为4类,但中国、欧州的建筑描述分类与美国存在差异;在层间位移限制要求方面,均提出弹塑性层间位移要求,但针对重点各不相同,且中国规范对小震提出了弹性位移限制;结构基本周期计算3种规范使用不同的公式,但按照中国规范计算的周期最短;关于反应谱折减系数,中国规范直接给出折减系数,欧洲标准采用性能系数q进行折减,美国则采用反应修正系数R.

There are major differences in code for seismic design of buildings among China, the US and Europe. The design principles,philosophy, and parameters of 3 codes are compared and analyzed in this paper. This study has shown that the 3 codes differ not only in classification principles but also in determination methods and values of the parameter. The seismic precaution category of the 3 codes can be divided into four main classes while China and Europe differ from that of the US in terms of building description classification. All of the3 codes proposed elastoplastic layer displacement requirements while compared with the codes in Europe and the US, China suggests elastic displacement limit for small-sized earthquake additionally. The formula of the basic period of structures of the 3 codes contrasts with each other while the result of China is minimum. As for the response spectrum reduction factors, the reduction factor is directly given in China,the performance factor q is adopted for reduction in Europe, and the response correction factor R is adopted in the US.