Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Analysis of Stresses on Buried Natural Gas Pipeline Subjected to Ground Subsidence

매설 천연가스배관의 지반침하에 의한 응력 분석

  • 김형식 (한국가스공사 연구개발원 LNG설비기술연구실) ;
  • 김우식 (한국가스공사 연구개발원 LNG설비기술연구실) ;
  • 방인완 (서울대학교 재료공학부) ;
  • 오규환 (서울대학교 재료공학부) ;
  • 홍성호 (한국가스공사 연구개발원 LNG설비기술연구실)
  • Published : 1998.06.01
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Abstract

This study was initiated to examine the stress and deformation characteristics of the pipelines which were subjected to various environmental conditions in order to confirm their integrity. As the part of them, this paper presents the analysis results for the effect of ground subsidence combined with main loads on buried natural gas pipelines. The ground subsidence which can occur for buried gas pipeline has been classified to the three cases. Finite element method was used to analyze the effect of ground subsidences on pipeline of 26 inch(0.660 m) and 30 inch(0.762 m) diameter used as high pressure ($70 kg_f/cm^2(6.86 MPa)$) main pipelines of KOGAS. This paper shows the result of stress analysis for the pipelines subjected to those three case ground subsidence. Comparing these results with safety criterion of KOGAS(0.9 $\sigma_y$), maximum allowable settlement and loads have been calculated.

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