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Open AccessTechnical Note

Development of Multi-Objective Optimal Redundant Design Approach for Multiple Pipe Failure in Water Distribution System

1
Research Center for Disaster Prevention Science and Technology, Korea University, Anamdong, Seongbukgu, Seoul 136-713, Korea
2
School of Civil, Environmental and Architectural Engineering, Korea University, Anamdong, Seongbukgu, Seoul 136-713, Korea
*
Author to whom correspondence should be addressed.
Water 2019, 11(3), 553; https://doi.org/10.3390/w11030553
Received: 17 January 2019 / Revised: 10 March 2019 / Accepted: 13 March 2019 / Published: 17 March 2019
This study proposes a multi-objective optimal design approach for water distribution systems, considering mechanical system redundancy under multiple pipe failure. Mechanical redundancy is applied to the system’s hydraulic ability, based on the pressure deficit between the pressure requirements under abnormal conditions. The developed design approach shows the relationships between multiple pipe failure states and system redundancy, for different numbers of pipe-failure conditions (e.g., first, second, third, …, tenth). Furthermore, to consider extreme demand modeling, the threshold of the demand quantity is investigated simultaneously with multiple pipe failure modeling. The design performance is evaluated using the mechanical redundancy deficit under extreme demand conditions. To verify the proposed design approach, an expanded version of the well-known benchmark network is used, configured as an ideal grid-shape, and the multi-objective harmony search algorithm is used as the optimal design approach, considering construction cost and system mechanical redundancy. This optimal design technique could be used to propose a standard for pipe failure, based on factors such as the number of broken pipes, during failure condition analysis for redundancy-based designs of water distribution systems. View Full-Text
Keywords: mechanical redundancy-based design; water distribution systems; multiple pipe failure modeling; extreme demand condition; multi-objective optimization mechanical redundancy-based design; water distribution systems; multiple pipe failure modeling; extreme demand condition; multi-objective optimization
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Choi, Y.H.; Kim, J.H. Development of Multi-Objective Optimal Redundant Design Approach for Multiple Pipe Failure in Water Distribution System. Water 2019, 11, 553.

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