Time dependent reliability analysis of underground concrete pipes subjected to sulphide corrosion

Mahmoodian, M and Alani, A 2013, 'Time dependent reliability analysis of underground concrete pipes subjected to sulphide corrosion', in George Deodatis, Bruce R. Ellingwood, Dan M. Frangopol (ed.) Proceedings of the 11th International Conference on Structural Safety and Reliability (ICOSSAR 2013), New York, United States, 16-20 June 2013, pp. 5109-5114.


Document type: Conference Paper
Collection: Conference Papers

Title Time dependent reliability analysis of underground concrete pipes subjected to sulphide corrosion
Author(s) Mahmoodian, M
Alani, A
Year 2013
Conference name ICOSSAR 2013: Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures
Conference location New York, United States
Conference dates 16-20 June 2013
Proceedings title Proceedings of the 11th International Conference on Structural Safety and Reliability (ICOSSAR 2013)
Editor(s) George Deodatis, Bruce R. Ellingwood, Dan M. Frangopol
Publisher Taylor and Francis
Place of publication United States
Start page 5109
End page 5114
Total pages 6
Abstract Sulphide corrosion is known as the predominant form of deterioration which reduces the ser-vice life of sewer systems and increases the costs of maintenance and rehabilitation. Reliability analysis can help pipeline owners and sewer system managers to predict service life of the pipes and the time for repair or replacement. To include uncertainties in the reliability analysis, the corrosion process can be considered as a stochastic process. This paper presents a stochastic gamma process model to account for temporal variability and uncertainties associated with the corrosion process in concrete sewer pipes that typically increases the probability of failure with the aging of the pipe. The proposed methodology is then applied to numerical val-ues of a concrete sewer system in the UK. The Monte Carlo simulation method is also used to verify the ob-tained results. The results showed that a gamma process can properly model the monotonic behavior of aging and deterioration. The application of the gamma process presented in this paper would contribute to widening the use of stochastic processes for modeling of structural degradation processes such as wear, fatigue, corro-sion, crack, erosion, creep, and so on. The results can provide guidance for both the assessment of existing concrete sewers and the designing of new pipes with longer service life.
Subjects Structural Engineering
Infrastructure Engineering and Asset Management
Copyright notice © 2013 Taylor and Francis Group, LLC
ISBN 9781138000865
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