跨越断层埋地管线地震反应数值分析
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摘要
跨越断层埋地管线在地震中的破坏是非常严重的,地震本身和管土相互作用体系中都存在很多不确定性因素,所以管线在断层运动过程中反应比较复杂。本文利用有限元理论和数值模拟手段,建立了管土作用模型,采用非线性接触问题研究方法详细地分析了管线由断层运动而产生的反应,对影响管线的各种因素进行了分析,包括位错量、跨越角度、断层运动形式、埋设深度、初始轴向力、断层裂缝宽度、填覆土质和管径。通过研究,得到一些初步结论。
The damage of buried pipelines crossing the active fault is serious during an earthquake.There are generally many uncertainties in the earthquakes and the pipe-soil interaction systems,which make the seismic responses of buried pipelines significantly complicated during the movement of active fault.In this paper,the analysis model of pipe-soil system is constructed on the basis of the finite element theory and numerical simulation method,and the seismic responses of pipelines are analyzed considering the nonlinear contact problem.Some influential factors on the response of buried pipelines were studied,including the displacement of active fault,the angle between pipeline and fault,the form of fault movement,the buried depth,the initial axial force,the width of the lap,the material of soil around the pipeline and the diameter of pipeline.Based on the results of analysis,some conclusions about the seismic responses of pipelines are drawn.
The damage of buried pipelines crossing the active fault is serious during an earthquake.There are generally many uncertainties in the earthquakes and the pipe-soil interaction systems,which make the seismic responses of buried pipelines significantly complicated during the movement of active fault.In this paper,the analysis model of pipe-soil system is constructed on the basis of the finite element theory and numerical simulation method,and the seismic responses of pipelines are analyzed considering the nonlinear contact problem.Some influential factors on the response of buried pipelines were studied,including the displacement of active fault,the angle between pipeline and fault,the form of fault movement,the buried depth,the initial axial force,the width of the lap,the material of soil around the pipeline and the diameter of pipeline.Based on the results of analysis,some conclusions about the seismic responses of pipelines are drawn.
引文
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[6]胡明祎,林均歧,李祚华.跨越断层埋地管线地震反应研究述评[J].地震工程与工程振动,2005,25(1):159~163.
[7]孙绍平,韩阳.生命线地震工程研究述评[J].土木工程学报,2003,36(5):97~104.
[8]张良春,孙卓.接触分析中一种确定接触面的方法[J],舰船科学技术,2003,25(2):62~64.
[9]齐良锋,简浩.引入接触单元模拟桩土共同作用[J].岩土力学,2005,26(1):127~130.
[10]AD INA.Theory and modeling gu ide[J].AD INA R&D Inc.2004,1(9):444~449.
[11]巩云鹏,张伟华,鲍劲松.三维弹性摩擦接触分析的边界元柔度矩阵法[J].东北大学学报,2000,21(3):305~308.
[12]郭恩栋,王东升,陆鸣,等.青新交界8.1级地震生命线工程震害[J].地震工程与工程振动,2002,22(3):77~81.
[13]胡明祎.跨越断层埋地管线数值模拟分析[D].哈尔滨:中国地震局工程力学研究所,2005.
[2]N M Newmark,W J Hall.P ipeline design to resist large fau lt d isplacem ent.Proc.U.S.Nat.Conf.Earthquake Eng.[C].1975.
[3]Nelson I,W eid linger P.Dynam ic seism ic analysis of long segm ented lifelines[J].Trans.ASME J.Pressure VesselTechnol.1979,101:10~20.
[4]W ang L R L,W ang L J.Buried p ipelines in large fau ltmovem ents,lifeline earthquake engineering proceed ings of the Fourth U.S.Conference[C].San Francisco,Californ ia,1995.8:152~159.
[5]郭恩栋,冯启民.跨断层埋地钢管道抗震计算方法研究[J].地震工程与工程振动,1999,21(4):43~47.
[6]胡明祎,林均歧,李祚华.跨越断层埋地管线地震反应研究述评[J].地震工程与工程振动,2005,25(1):159~163.
[7]孙绍平,韩阳.生命线地震工程研究述评[J].土木工程学报,2003,36(5):97~104.
[8]张良春,孙卓.接触分析中一种确定接触面的方法[J],舰船科学技术,2003,25(2):62~64.
[9]齐良锋,简浩.引入接触单元模拟桩土共同作用[J].岩土力学,2005,26(1):127~130.
[10]AD INA.Theory and modeling gu ide[J].AD INA R&D Inc.2004,1(9):444~449.
[11]巩云鹏,张伟华,鲍劲松.三维弹性摩擦接触分析的边界元柔度矩阵法[J].东北大学学报,2000,21(3):305~308.
[12]郭恩栋,王东升,陆鸣,等.青新交界8.1级地震生命线工程震害[J].地震工程与工程振动,2002,22(3):77~81.
[13]胡明祎.跨越断层埋地管线数值模拟分析[D].哈尔滨:中国地震局工程力学研究所,2005.
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