Reliability analysis of city gas pipelines subjected to surface loads based on the Kriging model

Author:

Peng Xingyu1,Xu Ling2ORCID,Gao Jian3,Liu Chang3,Zhou Jiao4

Affiliation:

1. Oil-Gas Storage and Transportation Engineering, Petroleum Engineering School, Southwest Petroleum University, Chengdu, China

2. Petroleum Engineering School, Southwest Petroleum University, Chengdu, China

3. Institute of Safety and Environmental Protection and Technological Supervision, PetroChina Southwest Oil & Gasfield Company, Chengdu, China

4. Safety Engineering Research Institute, SINOPEC, Qingdao, China

Abstract

Surface loads imposed on pipelines by illegal buildings in urban areas are common. A surface load can cause ground subsidence and pipeline deformation, as well as accidents such as leakages of oil and gas media and even explosions. In this paper, a pipeline reliability model based on stress–strength interference is established; based on structural reliability theory, the authors analyze the maximum equivalent stress of a pipeline’s dangerous section and pipe yield stress. Through the combination of the Kriging model and the method proposed by the Joint Committee of Structural Safety (JC method), the established limit state equation is approximated as a surrogate model, and the non-normal random variables are normalized using the JC method. The reliability indexes of the pipeline in the frame and brick–concrete structures were solved using MATLAB, and the results were verified and compared using the Monte Carlo Simulation (MCS) method. Through calculations, the reliability of the pipeline under the surface load of a frame-structure building was 0.9852, while the reliability of the pipeline under a brick-concrete structure was 0.9998, and the relative error with the MCS method was less than 1%. The method used in this paper has good applicability in analyzing the reliability of pressure-occupied pipeline and has certain reference and guiding significance for practical engineering.

Publisher

SAGE Publications

Subject

Safety, Risk, Reliability and Quality

Reference27 articles.

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. The mean remaining strength evaluation of a multi-state system under a stress-strength model;Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability;2023-11-29

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