Post-earthquake hydraulic analyses of urban water supply network based on pressure drive demand model

This study develops a simulation method of water supply network against earthquakes based on pressure drive demand model. For this purpose, Monte Carlo method is used for the probabilistic seismic simulations and the mean system serviceability is obtained as the final analysis result. In each simulation, a post-earthquake water supply network hydraulic model comes into being as a result of random selection of pipelines status, then the system serviceability is calculated through hydraulic analysis based on pressure drive demand model. In case analysis, we use the developed method and GIARFFE software developed by professor O’Rourke from Cornell University to analyze an urban water supply network performance under different earthquake intensities. The results show that: the results between the developed method and GIRAFFE have the same trends, the developed method needs less number of Monte Carlo simulation than GIRAFFE, and less operation time than the GIRAFFE in a single simulation; a damaged pipeline reduces both of upstream and downstream nodes serviceability in the analysis based on pressure drive demand model.