한국안전학회지 (Journal of the Korean Society of Safety)

  • 제20권4호
  • /
  • Pages.20-28
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  • 2005
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
권호 표지

파손평가선도(FAD)와 FORM을 이용한 매설배관의 건전성 평가

The Reliability Estimation of Buried Pipeline Using the FAD and FORM

  • Lee, Ouk-Sub (Department of Mechanical Engineering, INHA University) ;
  • Kim, Dong-Hyeok (Department of Mechanical Engineering, INHA University)
  • 발행 : 2005.12.31
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초록

In this paper, the methodology for the reliability estimation of buried pipeline with longitudinal gouges and dent is presented and the limit state of buried pipeline is formulated by failure assessment diagram(FAD). The reliability of buried pipeline with defects has been estimated by using a theory of failure probability. The failure probability is calculated by using the FORM(first order reliability method) and Monte Carlo simulation. The results out of two procedures have been compared each other. It is found that the FORM and Monte Carlo simulation give similar results for varying boundary conditions and various random variables. Furthermore, it is also recognized that the failure probability increases with increasing of dent depth, gouge depth, gouge length, operating pressure, pipe outside radius and decreasing the wall thickness. And it is found that the analysis by using the failure assessment diagram gives highly conservative results than those by using the theory of failure probability.

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참고문헌

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