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Reliability analysis of large-diameter high-grade-steel natural gas pipelines under fault action
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作者 xiao-ting gu Xue-Rui Zang +4 位作者 Zhen-Yong Zhang Peng Yang Wen-Zhen Miao Ping Cao Bin Zhao 《Petroleum Science》 SCIE CAS CSCD 2022年第5期2387-2398,共12页
There are a lot of researches on qualitative aseismatic measures for buried gas pipeline crossing movable faults.But a few of them are quantitative,especially in the size and shape of the trench.The paper first establ... There are a lot of researches on qualitative aseismatic measures for buried gas pipeline crossing movable faults.But a few of them are quantitative,especially in the size and shape of the trench.The paper first established the finite element model of the strain of buried pipeline crossing a fault which effected by the size and shape of the trench.And it obtained new soil spring stiffness which considered different buried depth,bottom width of trench,trench slope and elastic modulus of soil.The mechanical analysis model of pipeline is established,and the limit state equation of pipeline is fitted.The reliability and sensitivity of the natural gas pipeline under fault action are analysed by a Monte Carlo method,and the error and accuracy are verified.When the pipeline is under tension,the sensitivity from large to small is buried depth,sand friction angle,pipe diameter,pipeline displacement,trench bottom width,trench depth,clay cohesion,trench slope and clay friction angle;when the pipeline is under pressure,the trench depth and clay cohesion have great influence.The findings of this study provide a reference for pipeline design and safety evaluation under fault action. 展开更多
关键词 Trench parameters Natural gas pipeline FAULT Soil-pipeline interaction Soil spring stiffness
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