震后供水系统破坏状态模拟及功能分析

Failure state simulation and functional analysis of water supply system in post-earthquake

供水管网地震过程中往往会遭到不同程度的破坏,以震后管线破坏状态模拟为基础,对带渗漏管网进行水力分析,进而评价其服务性能.在渗漏管网流分析时,引入节点配水量和节点压力的函数关系,结合中国点式渗漏模型,通过求解非线性方程组,得到震后管网节点的供水量和节点压力.该方法在传统的管网水力计算基础上,考虑节点流量随水压的动态变化,避免了负的压力计算值的产生.以一实际管网为例,介绍了震后供水管网功能分析的应用方法.

The water supply network is often damaged to some extent in earthquake,so the hydraulic analysis of the water supply network with leakage is performed and then its seismic performance is evaluated based on the failure state simulation of the pipelines.The relationship of nodal flow and nodal pressure is adopted during the hydraulic analysis of the network combined with Chinese leakage model,and the nodal flows and its pressure are obtained by solving a set of nonlinear equations.Since nodal flows are considered to vary with nodal pressures in this model based on traditional hydraulic calculation method of the network,negative pressures are avoided during the hydraulic calculations.The functional analysis approach is applied to an example of water supply network after an earthquake.