Reliability of Underground Pipelines Subject to Corrosion
Publication: Journal of Transportation Engineering
Volume 120, Issue 6
Abstract
The present paper is concerned with estimating the reliability of underground pipelines subject to externally applied loading and to corrosion, either externally or internally, or both. This affects the strength of the pipeline in resisting the applied loads so that the reliability would be expected to decrease with time. Corrosion is a phenomenon about which there is a great deal of uncertainty. One way of allowing for this is through probabilistic modeling of the material loss as a nonlinear function of time. This approach is explored in the present paper, using a nonlinear function first postulated for atmospheric corrosion. This model is incorporated into expressions for stress resulting from externally applied loading and internal pressure to provide a limit state function expressing the boundary between survival and failure of the system. The probability of system failure is then evaluated using techniques developed for structural reliability analysis.
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References
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2.
Kucera, V., and Mattsson, E. (1987). “Atmospheric Corrosion.” “Corrosion Mechanics,” F. Mansfeld, ed., Marcel Dekker, Inc., New York, N.Y.
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Romanov, H. (1957). “Underground corrosion.” NBS Circular 579, National Bureau of Standards, Washington D.C.
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Copyright © 1994 American Society of Civil Engineers.
History
Received: Apr 23, 1993
Published online: Nov 1, 1994
Published in print: Nov 1994
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