Seismic Reliability–Based Multiobjective Design of Water Distribution System: Sensitivity Analysis
Publication: Journal of Water Resources Planning and Management
Volume 143, Issue 2
Abstract
This study proposes a seismic reliability–based water distribution system (WDS) optimal design model that minimizes total cost and maximizes seismic reliability. Here, seismic reliability is defined as the ratio of the available quantity of water to the required demand under stochastic earthquake events. A new evaluation model is used to assess seismic reliability, while a multiobjective harmony search (MOHS) based on a ranking approach is used for optimization. The Anytown network was modified for the demonstration of the proposed method. First, this study performs the sensitivity analysis of MOHS parameter values [i.e., harmony search consideration rate (HMCR) and pitch adjustment rate (PAR)] to identify the best parameter set in a pipe-sizing problem of an Anytown network. Then, Pareto optimal solutions with three different tank configurations are obtained and compared with respect to the final Pareto fronts and the system designs. For the sensitivity analysis, it reveals that higher PAR and lower HMCR values are also required to maintain high searchability in a multiobjective (MO) framework. In addition, Pareto-optimal solutions found for networks with tanks dominated those found for those without tanks.
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Acknowledgments
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) (No. 2016R1A2A1A05005306).
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Published In
Journal of Water Resources Planning and Management
Volume 143 • Issue 2 • February 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Nov 27, 2015
Accepted: Aug 16, 2016
Published online: Oct 18, 2016
Published in print: Feb 1, 2017
Discussion open until: Mar 18, 2017
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