Chapter
Apr 26, 2012
Survival Analysis of Water Distribution Pipe Failure Data Using the Proportional Hazards Model
Authors: S. Park, Ph.D. [email protected], J. W. Kim [email protected], A. Newland, Ph.D. [email protected], B. J. Kim [email protected], and H. D. Jun, Ph.D. [email protected]Author Affiliations
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
In this paper the hazard rates of the cast iron 6 inch (about 150 mm) pipes of a study area are modeled by implementing the proportional hazards modeling approach for consecutive pipe failures. A methodology of identifying individual pipes according to the internal and external characteristics of pipe is applied to a case study water distribution pipe break database. The individual cast iron 6 inch pipes are categorized into seven ordered survival time groups (STGs) according to the minimum total number of breaks recorded in a pipe. The modeling results show that the failure times of all of the STGs have the Weibull distribution. In addition, the estimated baseline survival functions show that the survival probabilities of the STGs generally decrease as the number of break increases for a given time. It is found that STG I has an increasing baseline hazard rate whereas the other STGs have decreasing baseline hazard rates.
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© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Analysis (by type)
- Case studies
- Cast iron
- Data analysis
- Disaster risk management
- Disasters and hazards
- Engineering fundamentals
- Engineering materials (by type)
- Failure analysis
- Infrastructure
- Iron (material)
- Materials engineering
- Metals (material)
- Methodology (by type)
- Pipe failures
- Pipeline management
- Pipeline systems
- Pipelines
- Pipes
- Research methods (by type)
- Water pipelines
Authors
Affiliations
Assistant Professor, Dept of Civil Engineering, Pusan National University, San 30, Jang-Jeon Dong, Busan, Korea. E-mail: [email protected]
Basic Design Department, Design Research Center, SUNGDONG Shipbuilding & Marine Engineering, 1609-2 Hoang-Lee, KoangDo-Myun, Tong-Young, Korea;. E-mail: [email protected]
Associate, Booz Allen Hamilton, 8283 Greensboro Dr., McLean, VA 22102. E-mail: [email protected]
M.S., Utility Management Department, Ulsan Regional Office, Korea Water Resources Corporation, 1404-3 Ok Dong, Ulsan, Korea. E-mail: [email protected]
Full Time Lecturer, Dept. of Civil Engineering, Hanbat National University, Daejun, Korea. E-mail: [email protected]
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