大直径取水隧道横向地震响应数值计算分析
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摘要
日本的东日本大地震(日本3.11地震)对福岛核电站的破坏引起国内外高度重视,取水隧道作为核电站冷却循环供水设施,其抗震可靠性十分重要。为了研究某核电厂的取水隧道取水头部在横向地震动作用下的结构安全性,采用通用有限元程序ABAQUS建立三维土层-结构模型,对取水隧道进行了地震响应数值模拟计算。通过计算取水头部特殊段衬砌(闭口环、开口环)和立管结构在地震作用下的位移和内力,验算了取水隧道结构设计在7度0.15g地震加速度作用下的结构抗震可靠性,通过分析说明结构设计满足抗震要求。研究可为核电厂取水隧道取水头部结构地震响应和结构设计提供参考。
The damage of Fukushima nuclear power plant on East Japan earthquake caused international attention.Seismic reliability analysis of water intake tunnel is very important,which is a necessary supply facility to provide cooling water for nuclear power plant.To study the structural safety of the special section under the transverse earthquake affection,a threedimensional soil-structure model established by ABAQUS software was used to calculate the seismic response for the nuclear power plant water intake tunnel.The deformation and internal force of special section of the tunnel(closed segment and open segment) and vertical standpipe under the earthquake action were analyzed,and the reliablity of water intake tunnel was verified under the action of the earthquake peak acceleration(0.15g).The result of FEM calculation shows that earthquake resistant behavior of the special structure is in good condition.The research can provide a useful method for seismic response analysis of water intake tunnel head special structure.
The damage of Fukushima nuclear power plant on East Japan earthquake caused international attention.Seismic reliability analysis of water intake tunnel is very important,which is a necessary supply facility to provide cooling water for nuclear power plant.To study the structural safety of the special section under the transverse earthquake affection,a threedimensional soil-structure model established by ABAQUS software was used to calculate the seismic response for the nuclear power plant water intake tunnel.The deformation and internal force of special section of the tunnel(closed segment and open segment) and vertical standpipe under the earthquake action were analyzed,and the reliablity of water intake tunnel was verified under the action of the earthquake peak acceleration(0.15g).The result of FEM calculation shows that earthquake resistant behavior of the special structure is in good condition.The research can provide a useful method for seismic response analysis of water intake tunnel head special structure.
引文
[1]庄海洋,程绍革,陈国兴.阪神地震中大开地铁车站震害机制数值仿真分析[J].岩土力学,2008,29(1):245-250.
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[2]朱永全.109号隧道地震灾害与加固处理的思考[J].国防交通工程与技术,2008(4):1-4.
[3]李天斌.汶川特大地震中山岭隧道变形破坏特征及影响因素分析[J].工程地质学报,2008(6):742-750.
[4]路仕洋.宝成铁路宝鸡—广元段隧道震害的调查与分析[J].国防交通工程与技术,2008(6):59-61.
[5]皇民.浅埋双洞隧道地震动力响应研究[D].成都:西南交通大学,2009.
[6]陈卫忠,伍国军,贾善坡.ABAQUS在隧道及地下工程中的应用[M].北京:中国水利水电出版社,2010.
[7]GB 50267-97核电厂抗震设计规范[S].北京:中国计划出版社,1996.
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