Provided for Non-commercial Research and Educational Use Only. Not for Reproduction or Distribution or Commercial Use. Probabilistic Analysis of Underground Pipelines for Optimal Renewal Time
نویسندگان
چکیده
T. Tanaka (corresponding author) L. T. Nam K. Kobayashi Department of Urban Management, Kyoto University, Kyotodaigaku-katsura, Nisigyou-ku, Kyoto city 615-8540, Japan T. Tanaka (corresponding author) Planning section, Engineering Division, Osaka Waterworks Bureau, 1-14-16 Nankou-kita, Suminoe-ku, Osaka city 559-8558, Japan Tel.: +81-6-6616-5711 E-mail: [email protected] K. Kaito Frontier Research Center, Osaka University, 2-1 Yamada-oka, Suita city, Osaka 565-0871, Japan In practical management of an entire water distribution system, it is very important to define optimal renewal time for pipelines. Reasons mainly include their deterioration, invisibility as an underground system and the adverse impact on society in the case of leakage. Thus, this paper proposes a mathematical model to satisfy this actual need. The model is developed based on Weibull hazard function and least life-cycle cost estimation approach. This model enables us to determine not only the deterioration rate of pipelines but also optimal renewal time. Attention is further focused on finding optimal pipeline materials. Empirical study was conducted on the dataset of a pipeline system in the city of Osaka, Japan.
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Provided for Non-commercial Research and Educational Use Only. Not for Reproduction or Distribution or Commercial Use
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