【作者】 侯向秦； 张鹏； 段永红； 曹建；

【Author】 HOU Xiang-qin~1,ZHANG Peng~1,DUAN Yong-hong~2,CAO Jian~3 (1.School of Civil Eng.and Architecture,Southwest Petroleum Univ.,Chengdu 610500,China; 2.Nangchong Heneng Compressed Natural Gas Co.Let,Nangchong 637000,China; 3.Northwest Sichuan Gas Mine,PetroChina Southwest Oil and Gas Company,Jiangyou 621700,China)

【机构】 西南石油大学建筑工程学院； 南充合能压缩天然气有限公司； 中石油西南油气田分公司川西北气矿；

【摘要】 城市燃气管网是城市生命线工程的重要组成部分,它与生命线工程系统的共同特征之一是网络特性。因此城市燃气管网抗震可靠性分析包括两部分内容,即管线抗震可靠性分析和管网抗震可靠性分析。燃气输配管网的最大特点是不允许带渗漏作业,因此提出采用两态破坏准则,即渗漏和不渗漏两种状态的基础上,建立功能函数,采用概率的方式分析管线破坏的可能性。管网可靠性分析包括功能可靠性和连通可靠性,对城市燃气管网只需考虑连通可靠性既可。对网络连通可靠性分析中的解析法作了介绍,并就解析法中的最小路法的基本思想和及可靠性计算的简化过程作了详细的阐述。最后以典型的桥式网络为例,计算了网络中从源点到汇点的连通可靠度。更多还原

【Abstract】 Urban gas pipeline network is the important component in the city lifeline engineering systems.Same as other lifeline engineering systems,the system of urban gas supply pipelines represents the characteristics to be a network.So the reliability analysis for urban gas pipeline network under seismic involves two parts.That is anti-seismic analysis of the pipelines and anti-seismic analysis of the network.The most characteristic of gas transport and distribution pipeline network is that no leakage in operation.So the anti-seismic analysis of the underground pipelines based on two-state failure criterion is put forward.Performance function is set up for the pipelines with leakage and without leakage using the probability.For the network system,reliability includes function probability and connectivity probability.Connectivity probability need to be carried out for gas supply network.The last route set methods’basic idea and simplification are also set forth.At last the bridge type network is given as an example, and its connectivity probability is computed.更多还原