Computer-aided seismic reliability analysis of critical infrastructure: smart water network

Abstract

In this study, a probabilistic seismic reliability model was proposed to evaluate the performance of an urban water transmission network. The proposed reliability model consists of an input seismic generation module including probabilistic seismic hazard analysis and a hydraulic analysis module using EPANET. The hydraulic analysis module involves the deterioration of the pipeline, the numerical modeling of the water network facilities, and the interdependency between water and electric power network. For numerical simulations, a MATLAB code has also been developed to enable the EPANET analysis with pressure driven analysis and numerical modeling of network systems. In order to verify the proposed seismic reliability model, a real water network was adopted and the location and magnitude of the earthquake were determined by the probabilistic seismic hazard analysis. In addition, two performance indices (system serviceability index, nodal serviceability index) were introduced for the network performance evaluation. As a result of the numerical analysis, a water network was found to be significantly influenced by not only the magnitude of the earthquake but also the deterioration of pipeline and interdependency of an electric power network.