论文部分内容阅读
本文对二滩水库坝区进行了地震危险性分析,采用Der Kiureghian-Ang的断层破裂模型。断层破裂长度及烈度衰减的统计数据取自本地区历史地震资料的统计分析结果。 我国现行地震烈度区划图没有表示出未来一定时间内可能发生地震烈度的概率,并以描述性的宏观地震烈度为基础。本文用在一定时期内地震烈度超过某一特定数值的概率来表示其地震危险性,作为改进现行地震烈度区划的第一步。
In this paper, the seismic hazard analysis of Ertan reservoir dam area is carried out and the fault fracture model of Der Kiureghian-Ang is adopted. The statistics of fault rupture length and intensity decay are taken from the statistical analysis of historical seismic data in this area. The current seismic intensity zonation map of China does not indicate the probability of possible seismic intensity in a certain period of time in the future, and is based on the descriptive macro-seismic intensity. In this paper, the seismic risk is expressed as the probability of the seismic intensity exceeding a certain value within a certain period as the first step to improve the current seismic intensity regionalization.