基于投影寻踪聚类的供水管网地震韧性评估

为分级保障城市供水管网安全运行,基于韧性解析和管网震害机制,构建考虑管道物理属性、管外环境条件、管内水力功能等因素的供水管网地震安全韧性评估指标体系;引入投影寻踪方法对各指标进行线性投影,建立供水管网地震安全韧性评估的投影寻踪聚类模型,量化分析供水管网地震安全韧性水平并分级,确定各管段地震安全韧性等级及排序;应用评估某供水管网,并将评估结果与动态分级法、谱系聚类法进行对比。结果表明:基于投影寻踪聚类的供水管网地震韧性评估模型可成功实现供水管网地震安全的韧性分级与排序,更全面地反映管材、接口形式等不同因素对供水管网地震安全韧性的影响程度。

Assessment on seismic resilience of water supply network based on projection pursuit cluster

In order to ensure safe operation of urban water supply network at different levels,based on resilience analysis and seismic damage mechanism of network,a seismic safety resilience evaluation index system of the network was established which considered pipelines’physical properties,external environment and hydraulic function in pipes.Then,projection pursuit method was introduced to project evaluation index linearly,and a projection pursuit cluster model for assessment was established to analyze seismic safety resilience level and to obtain resilience grade and order of each pipes.Finally,this model was applied to evaluate a water supply network,and its assessment results were compared with those obtained by dynamic classification method and pedigree clustering method.The results show that the proposed evaluation model based on projection pursuit cluster can successfully grade and rank seismic safety resilience of water supply network and comprehensively reflect influence of different elements including pipes’material and connection type.