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Title:: Seismic Resilience Analysis of Water Distribution Networks with Multi-components and Resilience Improvement Strategies

Author(s):: LIU Wei¹; 2; WU Qianxiang²; (1.State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)(2.College of Civil Engineering,Tongji University,Shanghai 200092,China)

Keywords:: the water distribution network; seismic resilience; the resilience index; the recovery strategy; importance

摘要:: 为量化和提高城市供水管网抗震韧性,提出了一种供水管网抗震韧性分析框架和一种基于重要度的恢复策略。首先建立了供水管网的4种常见组件(水塔、泵站、水厂和管道)的功能分析方法,获得其基于需求的抗震韧性指标; 然后介绍了4种组件的易损性模型,确定各组件在地震下的损伤状态,并提出了一种基于动态重要度的方法来给出供水管网震后恢复策略。将该方法应用于一中型管网,对基于动态重要度的方法、基于静态重要度的方法和两种经验方法的抗震韧性进行比较。结果表明,基于动态重要度的方法可以显著提高供水管网的抗震韧性。

Abstract:: To quantify and improve the seismic resilience of urban water distribution networks,an analytical framework for resilience and a recovery strategy based on importance are proposed.Firstly,a functional analysis of the water distribution networks including 4 main components(the water tower,the water pump,the water plant,and the water pipe)is established to obtain the demand-based resilience index of the water distribution networks.Secondly,the fragility models determining the damage of the 4 components are introduced.Then an importance-based approach is proposed for working out a strategy for water distribution networks' post-earthquake recovery.Finally,a case study of a medium-sized water distribution network is done by the importance-based approach.The 4 results of seismic resilience from the 4 approaches—the dynamic importance-based approach,the static importance-based approach,and the other 2 empirical approaches—are compared with each other.It is obvious that the dynamic importance-based approach can significantly improve the seismic resilience of the water distribution networks.