累积绝对速度在核电厂地震危险性分析中的应用研究
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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.
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.
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.
引文
陈培善,白彤霞.1991.震源参数之间的定量关系[J].地震学报,13(4):401-411.
陈培善,陈海通.1989.由二维破裂模式导出的地震标定律[J].地震学报,11(4):337-350.
卢寿德.2006.《工程场地地震安全性评价(GB17741-2005)》宣贯教材[M].北京:中国标准出版社:79.
潘华.2000.概率地震危险性分析中参数不确定性研究[D].北京:中国地震局地球物理研究所:4-5.
戚承志,钱七虎.2000.核电站抗震研究综述[J].地震工程与工程振动,20(3):76-86.
中国地震局地球物理研究所.2005.广东阳江核电站厂址地震安全性评价报告[R].北京:中国地震局地球物理研究所:128-141.
Bolt B A.1973.Duration of strong ground motion[C]∥Proc Fifth World Conf Earth Eng:1304-1307.
Electric Power Research Institute.1988.A Criterion for Determining Exceedance of the Operating Basis Earthquake[R]∥EPRI Report NP-5930:1-28.
Electric Power Research Corporation.1991.Standardization of the Cumulative Absolute Velocity[R]∥EPRI Report TR-100082:1-20.
EPRI,Palo Alto,the US Depart ment of Energy.2006.Programon Technology Innovation:Use of Cumulative AbsoluteVelocity(CAV)in Determining Effects of Small Magnitude Earthquakes on Seismic Hazard Analyses[R]∥EPRIReport TR-1014099:1-40.
Hanks T C,Kanamori H.1979.A moment magnitude scale[J].J Geophys Res,84(B5):2348-2350.
陈培善,陈海通.1989.由二维破裂模式导出的地震标定律[J].地震学报,11(4):337-350.
卢寿德.2006.《工程场地地震安全性评价(GB17741-2005)》宣贯教材[M].北京:中国标准出版社:79.
潘华.2000.概率地震危险性分析中参数不确定性研究[D].北京:中国地震局地球物理研究所:4-5.
戚承志,钱七虎.2000.核电站抗震研究综述[J].地震工程与工程振动,20(3):76-86.
中国地震局地球物理研究所.2005.广东阳江核电站厂址地震安全性评价报告[R].北京:中国地震局地球物理研究所:128-141.
Bolt B A.1973.Duration of strong ground motion[C]∥Proc Fifth World Conf Earth Eng:1304-1307.
Electric Power Research Institute.1988.A Criterion for Determining Exceedance of the Operating Basis Earthquake[R]∥EPRI Report NP-5930:1-28.
Electric Power Research Corporation.1991.Standardization of the Cumulative Absolute Velocity[R]∥EPRI Report TR-100082:1-20.
EPRI,Palo Alto,the US Depart ment of Energy.2006.Programon Technology Innovation:Use of Cumulative AbsoluteVelocity(CAV)in Determining Effects of Small Magnitude Earthquakes on Seismic Hazard Analyses[R]∥EPRIReport TR-1014099:1-40.
Hanks T C,Kanamori H.1979.A moment magnitude scale[J].J Geophys Res,84(B5):2348-2350.
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