Comparative Study on Seismic Performance Analysis Methods of Water Distribution Systems
Publication: Lifelines 2022
ABSTRACT
Seismic performance analysis of water distribution system (WDS) is an essential step in the seismic design and resilience evaluation of WDS. Network connectivity reliability analysis and the flow-based hydraulic simulation methods are widely used in the seismic performance analysis of WDS. Many researchers choose one of these methods for seismic performance evaluation of WDS, but the comparison between the application results of these two methods is insufficient. This work compares the analysis results of the two methods through the application of benchmark WDS cases in which the connectivity reliability and the water demand performance of user nodes are used as quantitative measures; the two methods were conducted based on the Monte Carlo Simulation to consider the uncertainty of seismic damages of pipelines. Three widely-used benchmark WDSs (Modena, C-Town, Exnet) with different characteristics were used for case study. Through the application results of the benchmark WDSs under different seismic damage scenarios, the correlation, consistency, and statistical characteristics between the results of the two methods were compared. The results show that the correlation and consistency between the connectivity reliability and the water demand performance measure is low; the seismic connectivity reliability usually has a larger value than that of the water demand performance; user nodes with lower connectivity reliability may not necessarily have lower levels of water demand performance. The hydraulic simulation method is considered to be a more reliable analysis method because it includes both the geometry topology of pipelines and the hydraulic characteristics of WDS.
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Lifelines 2022
Pages: 416 - 427
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Published online: Nov 16, 2022
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