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Seismic functional reliability analysis of water distribution networks

机译：供水管网抗震功能可靠性分析

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Due to the huge destructive power of strong earthquakes, many breaks appear on water pipelines after such events. As a result, water leaks from these breaks, causing function loss of water distribution networks (WDNs). In order to evaluate the seismic performance of WDNs, these leaks cannot be ignored. In this paper, by adding a leakage model to the hydraulic equation of WDNs in a daily operation state, a new hydraulic equation is established to describe WDNs after the occurrence of earthquakes. As it is a stochastic equation, a random perturbation method is used to solve the equation and give the mean, standard deviation and skewness of the nodal head. In the meantime, a performance function is established to evaluate the reliability of WDNs. Three reliability analysis methods, a mean first-order second-moment method and two third-moment methods, are used to give the seismic functional reliability of WDNs. Meanwhile, two networks, a small WDN and an actual WDN which suffered serious damages during the Wenchuan Earthquake, 2008, are studied to compare the efficiency and precision of the three reliability methods.
机译：由于强烈地震的巨大破坏力，在此类事件发生后，输水管道上会出现许多断裂。结果，这些中断导致漏水，导致水分配网络（WDN）的功能丧失。为了评估WDN的抗震性能，这些泄漏不可忽略。本文通过在日常运行状态下的WDN水力方程中增加泄漏模型，建立了描述地震发生后WDN的新水力方程。由于它是一个随机方程，因此使用随机扰动方法求解该方程，并给出节点头的均值，标准差和偏度。同时，建立了性能函数来评估WDN的可靠性。三种可靠性分析方法，即平均一阶二阶矩法和两种三阶矩法，被用于给出WDN的地震功能可靠性。同时，研究了两个网络，一个小型WDN和一个实际WDN，它们在2008年汶川地震中遭受了严重破坏，以比较这三种可靠性方法的效率和精度。

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