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Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones

Author

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  • Mengying Xia

    (College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, China
    National Engineering Laboratory for Pipeline Safety, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum-Beijing, Beijing 102249, China)

  • Hong Zhang

    (College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, China
    National Engineering Laboratory for Pipeline Safety, Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum-Beijing, Beijing 102249, China)

Abstract

Buried pipelines are the main means of long distance transportation of natural gas. These pipelines are in high risk crossing liquefaction areas due to large deformations and stresses that may exist in pipe induced by the buoyancy load. In this study, a systematic analytical and numerical analysis were performed to investigate the mechanical behavior of a buried gas pipeline subjected to buoyancy in liquefaction areas. Soil constraints on pipe were considered accurately in the proposed models through soil spring assumptions. Effects of axial forces on pipe’s bending deformation were also considered via the governing equations for beam under bending and tension. Deformation compatibility condition was utilized to derive the axial forces in pipe. The accuracy of the proposed analytical model was validated by comparing its results with those derived by an established rigorous finite element model. In addition, parametric analysis was finally performed using the analytical model to study the influences of pipe diameter, pipe wall thickness, soil spring stiffness and width of liquefaction zone on pipe’s mechanical responses. This study can be referenced in the strength analysis and performance based safety evaluation of buried gas pipelines crossing liquefaction areas.

Suggested Citation

  • Mengying Xia & Hong Zhang, 2018. "Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones," Energies, MDPI, vol. 11(9), pages 1-20, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2334-:d:167728
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    References listed on IDEAS

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    1. Hongfang Lu & Guoguang Ma & Xiaoting Li & Shijuan Wu, 2018. "Stress Analysis of LNG Storage Tank Outlet Pipes and Flanges," Energies, MDPI, vol. 11(4), pages 1-19, April.
    2. Kai Wen & Zijie Xia & Weichao Yu & Jing Gong, 2018. "A New Lumped Parameter Model for Natural Gas Pipelines in State Space," Energies, MDPI, vol. 11(8), pages 1-17, July.
    3. Kai Wen & Lei He & Weichao Yu & Jing Gong, 2018. "A Reliability Assessment of the Hydrostatic Test of Pipeline with 0.8 Design Factor in the West–East China Natural Gas Pipeline III," Energies, MDPI, vol. 11(5), pages 1-9, May.
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    Cited by:

    1. Ying Liu & Daryoush Habibi & Douglas Chai & Xiuming Wang & Hao Chen, 2019. "A Numerical Study of Axisymmetric Wave Propagation in Buried Fluid-Filled Pipes for Optimizing the Vibro-Acoustic Technique When Locating Gas Pipelines," Energies, MDPI, vol. 12(19), pages 1-17, September.
    2. Krzysztof Tajduś & Anton Sroka & Rafał Misa & Antoni Tajduś & Stefan Meyer, 2021. "Surface Deformations Caused by the Convergence of Large Underground Gas Storage Facilities," Energies, MDPI, vol. 14(2), pages 1-11, January.

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