Urban gas facility is one of the urban lifeline engineering and many variables affect buried gas pipeline failure. To analyze the influence of randomness and uncertainty of variables on the safe operation of urban gas pipeline, the reliability theory and its application in pipeline are studied. Moreover, buried pipe failure model is established and various factors affecting the structural reliability of the urban high-pressure gas pipeline are analyzed, under the design pressure of 4.0 MPa, using the advanced First Order Second Moment (FOSM). The results show that, the influences of variables on the buried gas pipeline reliability are in the following descending order: the material yield strength, the pipe wall thickness, the internal fluid pressure, the vertical load, the bendingmoment coefficient, the pipe diameter, the deflection coefficient, the elastic modulus and any other factors. Keeping the variation coefficients at a constant of 0.05, the pipe reliability index increases with the material yield strength, the pipe wall thickness, the deflection coefficient, and decreases with other variables mentioned above. At the same time, the reliability index is related with the variation coefficient, the greater the variation coefficient, the smaller the reliability index. This conclusion is substantiated not only for the parameters positively correlated with the failure probability, but also for the parameters inversely related to the probability. Finally, some suggestions are provided to improve the structural reliability analysis of the urban high-pressure gas pipeline.
LI Jun
,
QIN Chaokui
,
YAN Mingqing
. Structural Reliability Analysis of Buried Steel High-pressure Gas Pipeline[J]. Science & Technology Review, 2014
, 32(28/29)
: 75
-78
.
DOI: 10.3981/j.issn.1000-7857.2014.h2.010
[1] 黄超, 翁文国, 吴健宏. 城市燃气管网的故障传播模型[J]. 清华大学学报: 自然科学版, 2008, 48(8): 1283-1286.Huang Chao, Weng Wenguo, Wu Jianhong. Failure propagation modelfor city gas pipeline network[J]. Journal of Tsinghua University: Science& Technology, 2008, 48(8): 1283-1286.
[2] 黄小美, 彭世尼, 杨俊杰, 等. 国内典型城市燃气管道失效调查与分析[J]. 煤气与热力, 2010, 30(9): 26-29.Huang Xiaomei, Peng Shini, Yang Junjie, et al. Investigation andanalysis on failure of gas pipeline in typical domestic cities[J]. Gas &Heat, 2010, 30(9): 26-29.
[3] Kucheryavyi V I, Mil'kov S N. Reliability analysis of a compressionsection of a gas pipeline with the presence of longitudinal cracks[J].Journal of Machinery Manufacture and Reliability, 2011, 40(3): 290-293.
[4] Lee O S, Kim D H. Reliability estimation of buried gas pipelines interms of various types of random variable distribution[J]. Journal ofMechanical Science and Technology, 2005, 19(6): 1280-1289.
[5] 陈伟珂, 马法平. 基于风险检测的埋地燃气管道失效可能性分析[J].天然气工业, 2009, 29(8): 113-115.Cheng Weike, Ma Faping. Failure possibility analysis of buried gaspipelines by the risk-based inspection[J]. Natural Gas Industry, 2009,29(8): 113-115.
[6] 程五一, 王贵和, 吕建国. 系统可靠性理论[M]. 北京: 中国建筑工业出版社, 2010.Cheng Wuyi, Wang Guihe, Lü Jianguo. The theory of system reliability[M]. Beijing: China Building Industry Press, 2010.
[7] 中国建筑科学研究院. GB 50153—2008 工程结构可靠性统一标准[S]. 北京: 中国建筑工业出版社, 2008.China Academy of Building Research. GB 50153—2008 Unifiedstandard for reliability design of engineering structures[S]. Beijing:China Building Industry Press, 2008.
[8] 帅健. 管线力学[M]. 北京: 科学出版社, 2010.Shuai Jian. Pipeline mechanics[M]. Beijing: Science Press, 2010.
[9] 李智劳, 宁晓周, 闫云聚, 等. 基于应力概率分布的管道可靠性分析方法研究[J]. 武汉理工大学学报, 2010, 32(9): 72-75.Li Zhilao, Ning Xiaozhou, Yan Yunju, et al. Research on reliabilityanalysis of pipelines based on stress probability distribution[J]. Journalof Wuhan University of Technology, 2010, 32(9): 72-75.
[10] Amirat A, Mohamed-Chateauneuf A, Chaoui K. Reliability assessmentof underground pipelines under the combined effect of activecorrosion and residual stress[J]. International Journal of PressureVessels and Piping, 2006, 83(2): 107-117.
[11] Ahammed M, Melchers R E. Probabilistic analysis of undergroundpipelines subject to combined stresses and corrosion[J]. EngineeringStructures, 1997, 19(12): 988-994.
[12] Caleyo F, Velázquez J C, Valor A, et al. Probability distribution ofpitting corrosion depth and rate in underground pipelines: A MonteCarlo study[J]. Corrosion Science, 2009, 51(9): 1925-1934.
[13] 赵国藩, 金伟良, 贡金鑫. 结构可靠度理论[M]. 北京: 中国建筑工业出版社, 2000.Zhao Guopan, Jin Weiliang, Gong Jinxin. Structural reliability theory[M]. Beijing: China Building Industry Press, 2000.
[14] Xu L Y, Cheng Y F. Reliability and failure pressure prediction ofvarious grades of pipeline steel in the presence of corrosion defectsand pre-strain[J]. International Journal of Pressure Vessels andPiping, 2012, 89(1): 75-84.
[15] Lee S M,Chang Y S,Choi J B,et al.Probabilisticintegrity assessmentof corroded gas pipelines[J]. Journal of Pressure Vessel Technology,2006, 128(4): 547-555.
[16] Hall P L, Strutt J E. Probabilistic physics-of-failure models forcomponent reliabilities using Monte Carlo simulation and Weibullanalysis: a parametric study[J]. Reliability Engineering & SystemSafety, 2003, 80(3): 233-242.
[17] Pievatolo A, Ruggeri F. Bayesian reliability analysis of complexrepairable systems[J]. Applied Stochastic Models in Business andIndustry, 2004, 20(3): 253-264.
[18] Sinha S K, Pandey M D. Probabilistic neural network for reliabilityassessment of oil and gas pipelines[J]. Computer-Aided Civil andInfrastructure Engineering, 2002, 17(5): 320-329.
[19] Zhou J, Rothwell B, Nessim M, et al. Reliability-based design andassessment standards for onshore natural gas transmission pipelines[J].Journal of Pressure Vessel Technology, 2009, 131(3): 7021-7026.
[20] 中国市政工程华北设计研究院. GB 50028—2006 城镇燃气设计规范[S]. 北京: 中国建筑工业出版社, 2006.North China Municipal Engineering Design and Research Institute.GB 50028—2006 Code for design of city gas engineering[S]. Beijing:China Building Industry Press, 2006.
