核电厂取水隧道横纵向地震力对比与风险分析
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摘要
日本3.11地震对福岛核电站的破坏引起了国际高度重视,取水隧道作为核电站冷却循环用水的重要供给设施之一,其抗震可靠性分析十分重要。采用通用有限元程序ABAQUS建立三维土层-结构模型,对核电厂的取水隧道特殊段在横向和纵向地震动作用下的结构安全性进行了分析,计算表明隧道在7度0.15 g地震加速度作用下,特殊段衬砌(开口环、闭口环)和立管结构发生破坏的概率较小,设计结构方案具有良好的抗震性能。结合结构内力计算结果,分析了特殊段结构抗震风险。研究工作将为核电厂取水隧道取水头部复杂结构地震反应分析和其他类似结构设计提供参考。
The damage of Fukushima nuclear power plant during Japan3.11earthquake had caused highly international attention.Seismic reliability analysis of water intake tunnel a cooling water supply facility of nuclear power plant is quite important.To study the structural safety of the water tunnel under the transverse and longitudinal earthquake,a FEM three-dimensional soil-structure model with the help of ABAQUS software was established to do seismic response analysis and calculation about water intake tunnel of nuclear power plant.And the internal force of special section of the tunnel(closed loop and open loop)and standpipe under the earthquake action was studied and compared.Generally speaking,under the action of the earthquake peak acceleration(0.15 g),the probability of failure is insignificant,and earthquake resistant behavior of the special structure is under control.The risk analysis of the special structure was studied based on the FEM calculation.It would provide an effective study method for seismic response analysis special structure of water intake tunnel head,and similar structure design.
The damage of Fukushima nuclear power plant during Japan3.11earthquake had caused highly international attention.Seismic reliability analysis of water intake tunnel a cooling water supply facility of nuclear power plant is quite important.To study the structural safety of the water tunnel under the transverse and longitudinal earthquake,a FEM three-dimensional soil-structure model with the help of ABAQUS software was established to do seismic response analysis and calculation about water intake tunnel of nuclear power plant.And the internal force of special section of the tunnel(closed loop and open loop)and standpipe under the earthquake action was studied and compared.Generally speaking,under the action of the earthquake peak acceleration(0.15 g),the probability of failure is insignificant,and earthquake resistant behavior of the special structure is under control.The risk analysis of the special structure was studied based on the FEM calculation.It would provide an effective study method for seismic response analysis special structure of water intake tunnel head,and similar structure design.
引文
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[3]耿萍,何川,晏启祥.盾构隧道纵向地震响应分析[J].西南交通大学学报,2007,42(3):283-287.
[4]刘金云,陈健云,胡志强.输水隧道在行波激励下的三维地震反应分析[J].防灾减灾工程学报,2007,27(1):11-16.
[5]陈健云,刘金云.输水隧道流-固耦合地震反应研究[J].沈阳建筑大学学报(自然科学版),2006,22(2):242-247.
[6]Azadi M,Mir Mohammad Hosseini S M.Analyses ofthe effect of seismic behavior of shallow tunnels in lique-fiable grounds[J].Tunnelling and Underground SpaceTechnology,2010,25(5):543-552.
[7]Anastasopoulos I,Gerolymos N,Drososi V,et al.Non-linear response of deep immersed tunnel to strong seis-mic shaking[J].Journal of Geotechnical and Geoenvir-onmental Engineering,2007,133(9):1067-1090.
[8]Anastasopoulos I,Gerolymos N,Drosos V,et al.Be-haviour of deep immersed tunnel under combined normalfault rupture deformation and subsequent seismic sha-king[J].Bulletin of Earthquake Engineering,2008,6(2):213-239.
[9]Hashash Y M A,Tseng W S,Krimotat A.Seismic soil-structure interaction analysis for immersed tube tunnelsretrofit:Geotechnical Special Publication,Seattle,WA,USA,1998[C].
[10]Kiyomiya O.Earthquake-resistant design features of im-mersed tunnels in Japan[J].Tunnelling and Under-ground Space Technology,1995,10(4):463-475.
[11]陈卫忠,伍国军,贾善坡.ABAQUS在隧道及地下工程中的应用[M].中国水利水电出版社,2010.
[12]国家技术监督局,中华人民共和国建设部.核电厂抗震设计规范[S].北京:中国计划出版社,1996.
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