核反应堆厂房基底隔震设计与地震响应分析
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摘要
核反应堆厂房是核电站建筑中最重要的组成部分,因此核电站在运行周期内必须确保在所有设想到的事件序列下核反应堆厂房的安全和完整性,特别是在强地震事件中。针对核反应堆厂房进行基础隔震设计与地震响应分析,给出隔震层的详细布置方案,采用ANSYS建立核反应堆厂房的有限元模型并进行非线性时程分析,探讨安全停堆地震和超设计地震作用下隔震与非隔震核反应堆厂房的地震响应。分析结果表明:隔震后核反应堆厂房自振周期大大延长,隔震核反应堆厂房表现为整体平动,基础隔震能使水平加速度大幅降低,结构变形主要集中在隔震层,核反应堆厂房自身变形很小,基底剪力远小于非隔震核反应堆厂房,隔震后有效降低了核反应堆厂房的楼层反应谱,隔震效果明显,显著提高了核反应堆厂房的抗震性能。
Nuclear reactor building is the most significant component of the nuclear power plant. Therefore,the safety and integrity of plant during operating period must be ensured in any design condition and,particularly,in the event of a severe earthquake. Base seismic isolation design and seismic analysis were conducted for nuclear reactor building,including expatiation of layout of the isolation bearings,a three-dimensional finite element model was established and the nonlinear time-history analysis was conducted,and the seismic response of the isolated and nonisolated nuclear reactor building under safe shutdown earthquake and beyond design earthquake were investigated. The results showed that the natural period was prolonged in the isolated nuclear reactor building compared with the nonisolated nuclear reactor building,and the isolated nuclear reactor building showed whole translational motion. The base seismic isolation system had strongly reduced the horizontal accelerations,and the structure displacement was centralized at seismic isolation layer,the lateral drift response of the superstructure was very small. The base shear force of isolated nuclear reactor building was far less than that of non-isolated nuclear reactor building. Base isolation technique could significantly reduce the floor response spectrum of the nuclear reactor building. The isolation effect was so obvious that the isolated nuclear reactor building could greatly improve the seismic behavior clearly.
Nuclear reactor building is the most significant component of the nuclear power plant. Therefore,the safety and integrity of plant during operating period must be ensured in any design condition and,particularly,in the event of a severe earthquake. Base seismic isolation design and seismic analysis were conducted for nuclear reactor building,including expatiation of layout of the isolation bearings,a three-dimensional finite element model was established and the nonlinear time-history analysis was conducted,and the seismic response of the isolated and nonisolated nuclear reactor building under safe shutdown earthquake and beyond design earthquake were investigated. The results showed that the natural period was prolonged in the isolated nuclear reactor building compared with the nonisolated nuclear reactor building,and the isolated nuclear reactor building showed whole translational motion. The base seismic isolation system had strongly reduced the horizontal accelerations,and the structure displacement was centralized at seismic isolation layer,the lateral drift response of the superstructure was very small. The base shear force of isolated nuclear reactor building was far less than that of non-isolated nuclear reactor building. Base isolation technique could significantly reduce the floor response spectrum of the nuclear reactor building. The isolation effect was so obvious that the isolated nuclear reactor building could greatly improve the seismic behavior clearly.
引文
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[6]ZHAO C F,CHEN J Y.Numerical Simulation and Investigation of the Base Isolated NPPC Building Under Three-Directional Seismic Loading[J].Nuclear Engineering and Design,2013,265:484-496.
[7]赵春风,陈健云.基础隔震系统对核电站安全壳抗震的影响[J].爆炸与冲击,2014,34(5):615-621.
[8]WANG D,ZHUANG C,ZHANG Y.Seismic Responses Characteristics of Base-Isolated AP1000 Nuclear Shield Building Subjected to Beyond-Design Basis Earthquake Shaking[J].Nuclear Engineering&Technology,2017,50(1):170-181.
[9]KIM S W,JEON B G,HAHM D G,et al.Seismic Fragility Evaluation of the Base-Isolated Nuclear Power Plant Piping System Using the Failure Criterion Based on Stress-Strain[J].Nuclear Engineering and Technology,2019,51(2):561-572.
[10]Nuclear Regulatory Commission.Design Response Spectra for Seismic Design of Nuclear Power Plants:Regulatory Guide 1.60[S].Washington D.C.:Nuclear Regulatory Commission,2014.
[11]Canadian Standards Association.Design Procedures for Seismic Qualification of Nuclear Power Plants:CSA N289.3-10[S].Toronto:CSA,2010.
[12]中华人民共和国建设部.核电厂抗震设计规范:GB 50627-97[S].北京:中国计划出版社,1998.
[13]Nuclear Regulatory Commission.Standard Review Plan:NUREG-0800[S].Washington,D.C.:NRC,2010.
[2]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[3]周云,吴从晓,张崇凌,等.芦山县人民医院门诊综合楼隔震结构分析与设计[J].建筑结构,2013,43(24):23-27.
[4]FORNI M,POGGIANTI P,DUSI A.Seismic Isolation of Nuclear Power Plants[C]∥15th World Conference on Earthquake Engineering.Lisbon:2012.
[5]FORNI M,BRUYN D D,CARDINI S.Seismic Isolation of GENIV Lead-Cooled Reactors[C]∥21st International Conference on Structural Mechanics in Reactor Technology.Delhi:2011.
[6]ZHAO C F,CHEN J Y.Numerical Simulation and Investigation of the Base Isolated NPPC Building Under Three-Directional Seismic Loading[J].Nuclear Engineering and Design,2013,265:484-496.
[7]赵春风,陈健云.基础隔震系统对核电站安全壳抗震的影响[J].爆炸与冲击,2014,34(5):615-621.
[8]WANG D,ZHUANG C,ZHANG Y.Seismic Responses Characteristics of Base-Isolated AP1000 Nuclear Shield Building Subjected to Beyond-Design Basis Earthquake Shaking[J].Nuclear Engineering&Technology,2017,50(1):170-181.
[9]KIM S W,JEON B G,HAHM D G,et al.Seismic Fragility Evaluation of the Base-Isolated Nuclear Power Plant Piping System Using the Failure Criterion Based on Stress-Strain[J].Nuclear Engineering and Technology,2019,51(2):561-572.
[10]Nuclear Regulatory Commission.Design Response Spectra for Seismic Design of Nuclear Power Plants:Regulatory Guide 1.60[S].Washington D.C.:Nuclear Regulatory Commission,2014.
[11]Canadian Standards Association.Design Procedures for Seismic Qualification of Nuclear Power Plants:CSA N289.3-10[S].Toronto:CSA,2010.
[12]中华人民共和国建设部.核电厂抗震设计规范:GB 50627-97[S].北京:中国计划出版社,1998.
[13]Nuclear Regulatory Commission.Standard Review Plan:NUREG-0800[S].Washington,D.C.:NRC,2010.