摘要
本文提出了一种地震危险性分析的烈度衰减椭圆模型及其计算方法.该模型是对Der. Kiureghian, Ang提出的断层—破裂模型的修改.基于大多数地震等烈度线都是椭圆这一事实,我们直接利用烈度的长轴向和短轴向衰减关系式进行危险性分析计算,舍弃了断层—破裂模型中的两个关系式(滑动长度—震级关系式;烈度—场地到断裂最短距离关系式).文中叙述了烈度衰减椭圆模型的思路和主要计算步骤.用该模型对河南两个场地进行了地震危险性分析,结果表明该模型是切实可行的.
In this paper an elliptic model of intensity-attenuation for seismic risk analysis and its calculation mathod, are given. This model is an improvement on fault rupture model proposed by Der. Kiureghian and Ang. on the basis of the fact that the earthquake intensity contoures genrelly possess elliptic shape, we directly utilise intensity- attenuation relations in the direction of the major axis and the minor axis for seismic risk analysis, two physical relations(the slip length-magnitude relation, the intensity-distance relation ) in the fault rupture model are discarded, this paper recounts train of thought and major calculat oinsteps of the elliptic intensity-attenuation model. We have made seismic risk analysis of two sites in Henan province using the elliptic model. The results show that the model is realistic and feasible.
出处
《防灾减灾学报》
1989年第2期21-28,共8页
Journal of Disaster Prevention And Reduction
