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Study on connectivity of buried pipeline network considering nodes reliability under seismic action

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  • Delong Huang
  • Zhongling Zong
  • Aiping Tang

Abstract

Currently, the connectivity calculation of complex pipeline networks is mostly simplified or ignores the influence of nodes such as elbows and tees on the connectivity reliability of the entire network. Historical earthquake damage shows that the seismic performance of municipal buried pipelines depends on the ability of nodes and interfaces to resist deformation. The influence of node reliability on network connectivity under reciprocal loading is a key issue to be addressed. Therefore, based on the general connectivity probabilistic analysis algorithm, this paper embeds the reliability of nodes into the reliability of edges, and derives a more detailed and comprehensive on-intersecting minimum path recursive decomposition algorithm considering elbows, tees, and other nodes; then, based on the reliability calculation theory of various pipeline components, the reliability of various nodes in different soil is calculated using finite element numerical simulation; finally, the reliability of a small simple pipeline network and a large complex pipeline network are used as examples to reveal the importance of considering nodes in the connectivity calculation of pipeline network. The reliability of the network system decreases significantly after considering the nodes such as elbows and tees. The damage of one node usually causes the failure of the whole pipes of the path. The damage probability is greater in the area with dense elbow and tee nodes. In this study, all types of nodes that are more prone to damage are considered in detail in the calculation. As a result, the proposed algorithm has been improved in computational accuracy, which lays the foundation for further accurate calculation of pipeline network connectivity.

Suggested Citation

  • Delong Huang & Zhongling Zong & Aiping Tang, 2022. "Study on connectivity of buried pipeline network considering nodes reliability under seismic action," PLOS ONE, Public Library of Science, vol. 17(8), pages 1-30, August.
    • Handle: RePEc:plo:pone00:0271533
    DOI: 10.1371/journal.pone.0271533
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    References listed on IDEAS

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    1. Delong Huang & Aiping Tang & Qiang Liu & Dianrui Mu & Yan Ding, 2021. "Response analysis of the nodes of pipe networks under seismic load," PLOS ONE, Public Library of Science, vol. 16(3), pages 1-27, March.
    2. Qiang Liu & Delong Huang & Aiping Tang & Xiaosheng Han, 2021. "Model performance analysis for landslide susceptibility in cold regions using accuracy rate and fluctuation characteristics," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 108(1), pages 1047-1067, August.
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