Functionality analysis of an urban water supply network after strong earthquakes

An urban water supply network (WSN) is a crucial lifeline system that helps to maintain the normal functioning of modern society. However, the hydraulic analysis of a significantly damaged WSN that suffers from pipe breaks or leaks remains challenging. In this paper, a probability-based framework is...

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Bibliographic Details
Published in:Earthquake Engineering and Engineering Vibration 2021-04, Vol.20 (2), p.291-302
Main Authors: Jichao, Li, Qingxue, Shang, Guanjie, Hou, Quanwang, Li, Tao, Wang
Format: Article
Language:English
Subjects:
Civil Engineering
Control
Direct reduction
Dynamical Systems
Earth Sciences
Earthquake damage
Earthquakes
Geotechnical Engineering & Applied Earth Sciences
Ground motion
Nodes
Pressure
Probability theory
Recent progress in evaluation and improvement on seismic resilience of engineering structures
Seismic activity
Special Section: Recent progress in evaluation and improvement on seismic resilience of engineering structures
Vibration
Water flow
Water shortages
Water supply
Wireless sensor networks
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Summary:An urban water supply network (WSN) is a crucial lifeline system that helps to maintain the normal functioning of modern society. However, the hydraulic analysis of a significantly damaged WSN that suffers from pipe breaks or leaks remains challenging. In this paper, a probability-based framework is proposed to assess the functionality of WSNs in the aftermath of powerful earthquakes. The serviceability of the WSN is quantified by using a comprehensive index that considers nodal water flow and nodal pressure. This index includes a coefficient that reflects the relative importance of these two parameters. The demand reduction (DR) method, which reduces the water flow of nodes while preventing the negative pressure of nodes, is proposed. The difference between the negative pressure elimination (NPE) method and the DR method is discussed by using the example of a WSN in a medium-sized city in China. The functionality values of the WSN are 0.76 and 0.99 when nodal pressure and nodal demands are used respectively as the index of system serviceability at an intensity level that would pertain to an earthquake considered to occur at a maximum level. When the intensity of ground motion is as high as 0.4 g, the DR method requires fewer samples than the NPE method to obtain accurate results. The NPE method eliminates most of the pipes, which may be unrealistic.
ISSN:1671-3664
1993-503X
DOI:10.1007/s11803-021-2020-0