基于强震记录的核电厂抗震标准反应谱研究
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摘要
依据基岩场地上的汶川地震强震记录,分析了地震动地面峰值和核电站抗震标准反应谱的特性,证明了在推导和使用标准反应谱时所考虑的地面峰值加速度与地面峰值速度之比(PGA/PGV)受地面峰值加速度和震中距的影响,将对标准反应谱形状产生明显的影响.另外还发现了基岩场地的竖向峰值加速度可能要远比通常认为水平向峰值加速度的2/3大.通过对比汶川地震强震记录的伪速度谱和规范给出的标准反应谱,发现规范中的标准反应谱在长周期段偏小.最后采用两种新的拟合反应谱的方法,不仅改变了以往先确定控制点的做法,而且很好地反映了均值加标准差反应谱.
Based on accelerograms on rock site from the Wenchuan earthquake,analyses of peak ground motion parameters and standard response spectra for nuclear power plant are made.The authors paid attention to the fact that the ratio(PGA/PGV)could be affected by PGA and epicenter distance,which is taken into account in developing standard response spectrum.This paper verified that such affection would significantly influence the shape of the deduced standard response spectrum.It is also validated that the vertical PGA on rock site may be much greater than 2/3 of the horizontal PGA.Compared to the pseudo-velocity spectra,the standard spectra are smaller in the long period region.Two new methods are presented to fit the mean-plus-one-standard-deviation spectra more aptly than conventional method.
Based on accelerograms on rock site from the Wenchuan earthquake,analyses of peak ground motion parameters and standard response spectra for nuclear power plant are made.The authors paid attention to the fact that the ratio(PGA/PGV)could be affected by PGA and epicenter distance,which is taken into account in developing standard response spectrum.This paper verified that such affection would significantly influence the shape of the deduced standard response spectrum.It is also validated that the vertical PGA on rock site may be much greater than 2/3 of the horizontal PGA.Compared to the pseudo-velocity spectra,the standard spectra are smaller in the long period region.Two new methods are presented to fit the mean-plus-one-standard-deviation spectra more aptly than conventional method.
引文
郭玉学,王治山.1993.中国核电厂抗震设计用标准反应谱[J].世界地震工程,(2):31--36.
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康兰池,金星.2009.四川地区地震动参数衰减规律研究[J].地震学报,31(4):403--410.
谢礼立.1982.强震观测与分析原理[M].北京:地震出版社:214--233.
中华人民共和国国家质量监督检验检疫总局.2009.GB/T17742-2008中国地震烈度表[S].北京:中国标准出版社:2--5.
Chopra A K.2005.Dynamics of Structures Theory and Applications to Earthquake Engineering(Second Edition)[M].北京:清华大学出版社:197--244.
Galal K,Ghobarah A.2006.Effect of near-fault earthquakes on North American nuclear design spectra[J].NuclearEngineering and Design,236(18):1928--1936.
Newmark N M,Blume J A,Kapur K K.1973.Seismic design spectra for nuclear power plants[J].Journal ofthe PowerDivision,99(2):287--303.
US Atomic Energy Commission.1973.Regulatory Guide1.60:Design Response Spectra for Seismic Design of NuclearPower Plants[S].USA:1--6.
US Nuclear Regulatory Commission.2001.US-NUREG/CR-6728Technical Basis for Revision of Regulatory Guidanceon Design Ground Motions:Hazard-and Risk-consistent Ground Motion Spedta Guidelines[S].Washington,DC,USA:138--141.
国家技术监督局.1998.GB50267-97核电厂抗震设计规范[S].北京:中国计划出版社:7--9.
康兰池,金星.2009.四川地区地震动参数衰减规律研究[J].地震学报,31(4):403--410.
谢礼立.1982.强震观测与分析原理[M].北京:地震出版社:214--233.
中华人民共和国国家质量监督检验检疫总局.2009.GB/T17742-2008中国地震烈度表[S].北京:中国标准出版社:2--5.
Chopra A K.2005.Dynamics of Structures Theory and Applications to Earthquake Engineering(Second Edition)[M].北京:清华大学出版社:197--244.
Galal K,Ghobarah A.2006.Effect of near-fault earthquakes on North American nuclear design spectra[J].NuclearEngineering and Design,236(18):1928--1936.
Newmark N M,Blume J A,Kapur K K.1973.Seismic design spectra for nuclear power plants[J].Journal ofthe PowerDivision,99(2):287--303.
US Atomic Energy Commission.1973.Regulatory Guide1.60:Design Response Spectra for Seismic Design of NuclearPower Plants[S].USA:1--6.
US Nuclear Regulatory Commission.2001.US-NUREG/CR-6728Technical Basis for Revision of Regulatory Guidanceon Design Ground Motions:Hazard-and Risk-consistent Ground Motion Spedta Guidelines[S].Washington,DC,USA:138--141.
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