Serviceability evaluation of water supply networks under seismic loads utilizing their operational physical mechanism  

作　　者：Miao Huiquan Li Jie 

机构地区：[1]Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education,Beijing University ofTechnology,Beijing 100124,China [2]State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China [3]Department of Structural Engineering,Tongji University,Shanghai 200092,China

出　　处：《Earthquake Engineering and Engineering Vibration》2022年第1期283-296,共14页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant No.5210082055;China Postdoctoral Science Foundation under Grant No.2021M690278。

摘　　要：The serviceability of water supply networks(WSNs)under seismic loads has significant importance for estimating the probable losses and the impact of diminished functionality on affected communities.The innovation presented in this paper is suggesting a new strategy to evaluate the seismic serviceability of WSNs,utilizing their operational physical mechanism.On one hand,this method can obtain the seismic serviceability of each node as well as entire WSNs.On the other hand,this method can dynamically reflect the propagation of randomness from ground motions to WSNs.First,a finite element model is established to capture the seismic response of buried pipe networks,and a leakage model is suggested to obtain the leakage area of WSNs.Second,the transient flow analysis of WSNs with or without leakage is derived to obtain dynamic water flow and pressure.Third,the seismic serviceability of WSNs is analyzed based on the probability density evolution method(PDEM).Finally,the seismic serviceability of a real WSN in Mianzhu city is assessed to illustrate the method.The case study shows that randomness from the ground motions can obviously affect the leakage state and the probability density of the nodal head during earthquakes.

关 键 词：water supply networks seismic serviceability nodal water pressure stochastic ground motions probability density evolution method 

分 类 号：TU991.33[建筑科学—市政工程]