【摘要】 指出了运用我国现行的考虑时空非均匀性的地震危险性分析计算方法对核电厂等设计精良的设施进行地震危险性分析时所存在的问题.介绍了累积绝对速度(CAV)的概念,并将其引入到我国现行的考虑时空非均匀性的地震危险性分析计算方法之中,用以排除厂址周围小震对核电厂地震危险性分析的影响,并选取实际工程场点进行了试算.试算结果表明,此方法能明显排除厂址周围小震对地震危险性分析结果的影响.更多还原

【Abstract】 This study shows that the past probabilistic seismic hazard analysis(PSHA),in which a minimum magnitude of 4.0 was taken,may overestimate the hazard by including earthquakes that are not damaging but contribute significantly to the hazard. PSHA provides a technical basis for establishing an appropriate non-damaging earthquake distribution used in probabilistic seismic hazard computation for nuclear power plants. A much more complete and technically defendable characterization of the damage potential for small earthquakes has been determined to be the cumulative Absolute velocity(CAV). Minimum CAV was applied as a filter,and the result shows that the application of a minimum CAV value significantly reduces the contribution of small magnitude earthquakes to the total hazard.更多还原