Abstract
With the development of bridge Structural Health Monitoring (SHM) technique and digital city concept in recent years, the Cluster Health Monitoring (CHM) system for urban bridges, simultaneously real-time monitoring many important bridges in the city has been come into engineering practice. This paper introduces a CHM system of urban bridges using Digital City VPN Network at the city of Hangzhou, China, which is composed of three parts: remote monitoring center, digital city VPN network, and bridge monitoring stations, seven bridges of different types (1 viaduct, 1 overpass, 3 tied arch bridges, 1 PC cable-stayed bridge, and 1 continuous beam bridge) are being monitored. One-year monitoring data have been collected through this CHM system, it indicates that using VPN (Virtual Private Network) technology to achieve online urban bridges cluster monitoring is a safe, reliable and practical methods.
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