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 levelsꎬ based on resilience analysis and seismic damage mechanism of networkꎬ a seismic safety resilience evaluation index system of the network was established which considered pipelines' physical propertiesꎬ external environment and hydraulic function in pipes. Thenꎬ projection pursuit method was introduced to project evaluation index linearlyꎬ 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. Finallyꎬ this model was applied to evaluate a water supply networkꎬ and its assessment results were compared with those 第 6 期 李岩峰等: 基于投影寻踪聚类的供水管网地震韧性评估 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.