地下管道动力可靠性分析的降维计算方法
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摘要
地下管道是城市重要的基础工程之一,对其进行的地震作用下的可靠性分析是地下管道安全性的重要指标.但传统的可靠性分析只是针对单根管道进行分析与实际情况存在一定差异.本文采用系统可靠性理论对地震作用下的地下管线动力可靠性进行分析,并针对系统可靠性计算量大的难题,引入了PNET法(point evaluation technique)与谱系聚类分析法两种降维方法,在保证精度的同时大大提高了计算效率,使对地下管线的系统可靠性分析达到实用化程度.最后还结合实例进行了系统可靠性计算并对两种降维方法做了比较分析,提出了相应改进措施.
Underground pipeline is one of the important infrastructure constructions of the city and its reliability analysis under earthquake action is a key index of the security of underground pipeline.However,the traditional reliability analysis focuses on single pipe,which is different from the real practice.The reliability analysis theory of structural systems is adopted in this paper to study the dynamic reliability of the underground pipeline.Two dimension reduction methods of point evaluation technique and pedigree clustering analysis were applied to the large amount of calculation in the reliability analysis of structural systems.With satisfactory calculation accuracy and computing time,the proposed approach proves to be a practical method for dynamic reliability analysis of the underground pipeline.An example was developed using this approach,and the results of the two dimension reduction methods were compared,through which some improvement measures were proposed.
Underground pipeline is one of the important infrastructure constructions of the city and its reliability analysis under earthquake action is a key index of the security of underground pipeline.However,the traditional reliability analysis focuses on single pipe,which is different from the real practice.The reliability analysis theory of structural systems is adopted in this paper to study the dynamic reliability of the underground pipeline.Two dimension reduction methods of point evaluation technique and pedigree clustering analysis were applied to the large amount of calculation in the reliability analysis of structural systems.With satisfactory calculation accuracy and computing time,the proposed approach proves to be a practical method for dynamic reliability analysis of the underground pipeline.An example was developed using this approach,and the results of the two dimension reduction methods were compared,through which some improvement measures were proposed.
引文
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[13]薛毅,陈立萍.统计建模与R软件[M].北京:清华大学出版社,2006.Xue Yi,Chen Liping.Statistical Modeling and R Soft-ware[M].Beijing:Tsinghua University Press,2006(in Chinese).
[2]余建星,郭振邦,徐慧,等.船舶与海洋结构物可靠性原理[M].天津:天津大学出版社,2001.Yu Jianxing,Guo Zhenbang,Xu Hui,et al.Reliability Theory of Ship and Offshore Structure[M].Tianjin:Tianjin University Press,2001(in Chinese).
[3]陆璇.实用多元统计分析[M].北京:清华大学出版社,2001.Lu Xuan.Applied Multivariate Statistical Analysis[M].Beijing:Tsinghua University Press,2001(in Chinese).
[4]Kouretzis G P,Bouckovalas G D,Gantes C J.3-D shell analysis of cylindrical underground structures under seismic shear(S)wave action[J].Soil Dynamics and Earthquake Engineering,2006,26(10):909-921.
[5]中国建筑科学研究院.GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.China Academy of Building Research.GB50011—2001 Code for Seismic Design of Buildings[S].Beijing:China Architectural Industry Press,2001(in Chinese).
[6]Yoshizaki Koji,O'Rourke T D,Hamada M.Large scale experiments of buried steel pipelines with elbows sub-jected to permanent ground deformation[J].Structural Engineering/Earthquake Engineering,2003,20(1):1-11.
[7]Koike T,Maruyama O,Garciano L E.Ground strain es-timation for lifeline earthquake engineering[J].Struc-tural Engineering and Mechanics,2007,25(3):291-310.
[8]Hahn G D,Sritharan S.Lateral response of underground pipelines to earthquakes[J].Computers and Structures,1994,53(3):601-611.
[9]景悦.地震作用下穿越管道安全可靠性研究[R].天津:天津市水利局,2001.Jing Yue.Reliability Analysis of Crossing Pipeline Under Earthquake Action[R].Tianjin:Tianjin Water Conser-vancy Bureau,2001(in Chinese).
[10]Park S,Choi S,Sikorsky C,et al.Efficient method for calculation of system reliability of a complex struc-ture[J].International Journal of Solids and Structures,2004,41(18/19):5035-5050.
[11]An Weiguang,Zhao Weitao,An Hai.Reliability analysis of stochastic structural system considering static strength,stiffness and fatigue[J].Science in China,Series G:Physics,Mechanics and Astronomy,2007,50(3):357-369.
[12]Adduri P R,Penmetsa R C.Bounds on structural system reliability in the presence of interval variables[J].Com-puters and Structures,2007,85(5/6):320-329.
[13]薛毅,陈立萍.统计建模与R软件[M].北京:清华大学出版社,2006.Xue Yi,Chen Liping.Statistical Modeling and R Soft-ware[M].Beijing:Tsinghua University Press,2006(in Chinese).
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