中国地震研究（英文版）2008，Vol.22Issue(2)：131-136,6.
Levels of Probability of Exceedance for Current Code Spectra in China
Levels of Probability of Exceedance for Current Code Spectra in China
摘要
Abstract
Long-period acceleration spectra determined by seismic safety evaluation for project sites are generally lower than that given by relative code spectra. In this paper, we discuss the recurrence periods corresponding to the code spectra of different periods, by using ground motion attenuation laws for sites of types Ⅰ and Ⅲ. We show the results that the longer the periods of code spectra are commonly the more conservative the seismic level is. As for the project examples in this paper, when the periods are longer than 3.7 or 5.2 seconds for sites of types Ⅰ or Ⅲ, the recurrence periods corresponding to the code spectra are longer than 5000 years. We suggest that some problems need to be further discussed, including the reliability of the present attenuation laws, the performance of those project structures that suffer long period seismic waves and have been designed according to the conservative codes, and the effects of ground motion parameters such as velocity and displacement on seismic design.关键词
Seismic design/Code spectra/Probability level of exceedanceKey words
Seismic design/Code spectra/Probability level of exceedance分类
天文与地球科学引用本文复制引用
Shen Jianwen,Liu Zheng,Shi Shuzhong..Levels of Probability of Exceedance for Current Code Spectra in China[J].中国地震研究（英文版）,2008,22(2):131-136,6.基金项目
The project is sponsored under the Key Scientific Research and Development Program of Zhejiang Province(2005C23075), China. （2005C23075）
