走滑断层作用下埋地钢质管道反应的改进解析方法
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摘要
考虑管土之间相互作用的非线性,提出了一种基于轴向总应变的走滑断层作用下埋地钢质管道反应的理论分析方法。该方法采用双折线管道钢本构模型,在管土小变形段应用弹性地基梁理论,在管土大变形段采用弹性梁理论。经有限元计算检验,在管道轴向总应力最大值达到极限应力之前,分析结果与有限元计算结果较为吻合,偏于保守,适于工程应用,且极大地减少了计算的时间成本,并得出结论:对于小断层错动作用下的大口径埋地管道,特别是在穿越角较小时,非线性管土相互作用的影响不容忽视。
Considering the non-linearity of pipe-soil interaction,an improved analytical method based on axial total strain for buried steel pipelines at crossings with strike-slip faults is proposed.The bilinear stress-strain relationship of pipe steel is adopted in the method.The beam-on-elastic-foundation theory is adopted for the segments where the pipe-soil deformation is small;meanwhile,the elastic-beam theory is employed for the segments where pipe-soil deformation is large.Compared with existing analytical methods,the results of the analytical methodology presented in the paper are found in good agreement with those of 3D nonlinear finite element analysis on condition that the pipe maximum axial total stress is lower than the ultimate stress.The analytical methodology herein is suitable for engineering applications due to its exact and conservative results,as well as the greatly reduced time cost of calculation compared with 3D nonlinear finite element analysis.It is also concluded that effects of nonlinear pipe-soil interaction for large-diameter buried pipelines are of significance at smaller fault movements and crossing angles.
Considering the non-linearity of pipe-soil interaction,an improved analytical method based on axial total strain for buried steel pipelines at crossings with strike-slip faults is proposed.The bilinear stress-strain relationship of pipe steel is adopted in the method.The beam-on-elastic-foundation theory is adopted for the segments where the pipe-soil deformation is small;meanwhile,the elastic-beam theory is employed for the segments where pipe-soil deformation is large.Compared with existing analytical methods,the results of the analytical methodology presented in the paper are found in good agreement with those of 3D nonlinear finite element analysis on condition that the pipe maximum axial total stress is lower than the ultimate stress.The analytical methodology herein is suitable for engineering applications due to its exact and conservative results,as well as the greatly reduced time cost of calculation compared with 3D nonlinear finite element analysis.It is also concluded that effects of nonlinear pipe-soil interaction for large-diameter buried pipelines are of significance at smaller fault movements and crossing angles.
引文
[1]Liu Ming,Wang Yongyi,Yu Zhifeng.Response of pipelines under fault crossing[C].Proceedings of the Eighteenth(2008)International Offshore and Polar Engineering Conference.Vancouver,BC,Canada,2008.
[2]朱庆杰,陈艳华,蒋录珍.场地和断层对埋地管道破坏的影响分析[J].岩土力学,2008,29(9):2392―2396.Zhu Qingjie,Chen Yanhua,Jiang Luzhen.Influences of site and faults on damage of buried pipelines[J].Rock and Soil Mechanics,2008,29(9):2392―2396.(in Chinese)
[3]Newmark N M,Hall W J.Pipeline design to resist large fault displacement[C].Proceedings of US Conference on Earthquake Engineering.Ann Arbor,USA,1975.
[4]Kennedy R P,Chow A W,Williamson R A.Fault movement effects on buried oil pipeline[J].Transportation Engineering Journal,1977,103:617―633.
[5]Wang L R L,Yeh Y H.A refined seismic analysis and design of buried pipeline for fault movement[J].Earthquake Engineering and Structural Dynamics,1985,13:75―96.
[6]Karamitros D K,Bouckovalas G D,Kouretzis G P.Stress analysis of buried steel pipelines at strike-slip fault crossings[J].Soil Dynamics and Earthquake Engineering,2007,27:200―211.
[7]SY/T 0450-2004,输油(气)钢质管道抗震设计规范[S].2004.SY/T 0450-2004,Code for seismic design of oil and gas steel pipeline[S].2004.(in Chinese)
[8]ALA-ASCE,Guidelines for the design of buried steel pipe[S].2001.
[9]刘爱文,张素灵,胡聿贤,李小军.地震断层作用下埋地管线的反应分析[J].地震工程与工程振动,2002,22(2):22―27.Liu Aiwen,Zhang Suling,Hu Yuxian,Li Xiaojun.A method for analyzing response of buried pipeline due to earthquake fault movement[J].Earthquake Engineering and Engineering Vibration,2002,22(2):22―27.(in Chinese)
[10]ADINA R&D,Inc.ADINA theory and modeling guide[M].Watertown,USA:ADINA R&D,Inc.,2004.
[11]IITK-GSDMA-EQ29-V1.0,Guidelines for seismic design of buried pipeline[S].2006.
[2]朱庆杰,陈艳华,蒋录珍.场地和断层对埋地管道破坏的影响分析[J].岩土力学,2008,29(9):2392―2396.Zhu Qingjie,Chen Yanhua,Jiang Luzhen.Influences of site and faults on damage of buried pipelines[J].Rock and Soil Mechanics,2008,29(9):2392―2396.(in Chinese)
[3]Newmark N M,Hall W J.Pipeline design to resist large fault displacement[C].Proceedings of US Conference on Earthquake Engineering.Ann Arbor,USA,1975.
[4]Kennedy R P,Chow A W,Williamson R A.Fault movement effects on buried oil pipeline[J].Transportation Engineering Journal,1977,103:617―633.
[5]Wang L R L,Yeh Y H.A refined seismic analysis and design of buried pipeline for fault movement[J].Earthquake Engineering and Structural Dynamics,1985,13:75―96.
[6]Karamitros D K,Bouckovalas G D,Kouretzis G P.Stress analysis of buried steel pipelines at strike-slip fault crossings[J].Soil Dynamics and Earthquake Engineering,2007,27:200―211.
[7]SY/T 0450-2004,输油(气)钢质管道抗震设计规范[S].2004.SY/T 0450-2004,Code for seismic design of oil and gas steel pipeline[S].2004.(in Chinese)
[8]ALA-ASCE,Guidelines for the design of buried steel pipe[S].2001.
[9]刘爱文,张素灵,胡聿贤,李小军.地震断层作用下埋地管线的反应分析[J].地震工程与工程振动,2002,22(2):22―27.Liu Aiwen,Zhang Suling,Hu Yuxian,Li Xiaojun.A method for analyzing response of buried pipeline due to earthquake fault movement[J].Earthquake Engineering and Engineering Vibration,2002,22(2):22―27.(in Chinese)
[10]ADINA R&D,Inc.ADINA theory and modeling guide[M].Watertown,USA:ADINA R&D,Inc.,2004.
[11]IITK-GSDMA-EQ29-V1.0,Guidelines for seismic design of buried pipeline[S].2006.
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