Seismic resilience assessment and optimization of urban water distribution network

doi:10.16265/j.cnki.issn 1003-3033.2021.02.019

Abstract

Abstract: In order to improve capabilities of urban water distribution network to cope with earthquake disasters, based on PRF method and considering urban water supply network's physical state and delivery capacities, a network equilibrium theory was proposed and a PRF designed before a seismic resilience assessment methodology of the network was established for evaluation in both structural and functional dimensions. Secondly, from perspectives of four key features of resilience: damage probability, damage consequence, recovery speed and recovery degree, optimization strategies, including network meshed expansion, pipeline ductile retrofitting, increasing recovery budget and recovery resource, were proposed and discussed. Finally, case studies were conducted on a water distribution network in East China to quantitatively assess resilience enhancement effects of different strategies, and optimal allocation methods of recovery resource r and recovery budget b under different decision scenarios were put forward. The results show that pipeline ductile retrofitting is an effective way to significantly enhance seismic resilience of water distribution network, and meshed expansion can improve network's performance but has no significant effect on its resilience. Recovery resources and recovery budget should be increased after meshed expansion.

Key words: earthquake disasters, water distribution network, resilience assessment, optimization strategies, performance response function (PRF)

CLC Number:

X915.5

HAN Lin, ZHAO Xudong, CHEN Zhilong, GONG Huadong. Seismic resilience assessment and optimization of urban water distribution network[J]. China Safety Science Journal, 2021, 31(2): 135-142.

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