基于管道易损性的供水管网震后服务功能研究

Study on the Post-Earthquake Service Function of Water Supply Networks Based on Pipeline Vulnerability

为研究不同管道易损性公式下供水管网的震后服务功能差异,提出一种评估震后管网服务功能的方法。首先,结合不同管材的特性,对比分析4种基于经验统计的管道易损性公式的管道震害率差异;其次,基于蒙特卡洛模拟方法,随机生成管道地震震害信息;再次,利用MATLAB软件构建震后供水管网模型;然后,以供水满足率为震后服务功能指标,通过压力驱动水力分析得到管网及节点的平均供水满足率;最后,以2个不同规模、不同管材占比的实际管网为例,对管网的平均震害率及震后服务功能进行对比分析。结果表明:不同公式计算得出的平均震害率与地震烈度有关;不同管材的管道长度占比影响管网的平均震害率;管网的震后服务功能不仅与管道震害率有关,同时与管网本身的规模、拓扑结构和密度相关。

In order to study the differences in the post-earthquake service function of water supply networks under diverse pipeline vulnerability formulas,a method for assessing the post-earthquake service function of water supply networks was proposed.Firstly,the differences in the pipeline seismic damage rate of four pipeline vulnerability formulas based on the empirical and statistical were contrasted and analyzed combined with the characteristics of different pipeline materials.Secondly,the seismic damage information of pipelines was randomly generated based on the Monte Carlo simulation approach.Thirdly,MATLAB software was used to establish the post-earthquake water supply model.Then,the average water supply fill rate of the water supply networks and nodes was obtained through hydraulic analysis based on the pressure drivee taking the fill rate of the water supply as the functional indicator of the post-earthquake service.Finally,two actual pipeline networks with different scales and different pipeline proportion were taken as examples to contrast and analyze the average seismic damage rate and the post-earthquake service function.The results show that the average seismic damage rate calculated using different formula is related to the earthquake intensity;the average seismic damage rate is influenced by the pipeline length proportion of different pipeline materials;the post-earthquake service function is not only related to the pipeline seismic damage rate,but also related to the scale,topological structure and density of the pipeline itself.