基于NGA衰减关系的坝址设定地震研究

开发了地震危险性概率分析程序RISKNEW,在输入数据相同的情况下,采用本文编制的程序与中国地震局地球物理研究所的标准程序计算得到的不同概率水准下的加速度值具有较好的一致性。提出结合潜源区内主干断裂和历史地震,依据地震危险性概率分析结果,即以场地相应设防概率水平的地震动峰值加速度为前提确定设定地震的方法。根据设定地震确定场地相关设计反应谱时,建议直接使用针对美国西部基岩强震记录统计得到的加速度反应谱衰减关系。将充分考虑大震近场特性且针对美国西部浅源地震建立的NGA衰减关系引入到我国水利水电工程设定地震研究。

Scenario earthquake research of dam site based on next generation attenuation (NGA) relations

A probabilistic seismic hazard analysis program RISKNEW is developed and tested in this paper.The test results show that,when using the same input data,the acceleration values of different probability levels calculated by RISKNEW are in good agreement with those obtained by using the standard procedure developed by the Institute of Geophysics,China Earthquake Administration.According to the main faults and historical earthquake of a potential seismic source zone,and on the basis of the peak ground motion ac...