Abstract
Wireless sensor networks provide a lot of advantages for vibration monitoring of bridges. The installation time and implementation cost of the monitoring system are greatly reduced by the adoption of this innovative technology. This paper presents a long-term vibration monitoring of the Hwamyung cable-stayed bridge in Korea using an Imote2-platformed wireless sensor network. First, the wireless vibration monitoring system of the bridge is briefly described by outlining the test history, the design of wireless sensor system, and the sensor deployment. Next, the vibration behaviors of the bridge are experimentally examined with respect to the variation of temperature, the wind loads induced by typhoons, and the change of bridge deck mass caused by pavement.
Highlights
Over the two past decades, the structural health monitoring has become increasingly important for the service life of civil infrastructures
The wireless vibration monitoring system of the bridge is briefly described by outlining the test history, the design of wireless sensor system, and the sensor deployment
The vibration behaviors of the bridge are experimentally examined with respect to the variation of temperature, the wind loads induced by typhoons, and the change of bridge deck mass caused by pavement
Summary
Over the two past decades, the structural health monitoring has become increasingly important for the service life of civil infrastructures. Many researchers have developed wireless sensors based on a variety of sensor platforms [6,7,8,9] By adopting those smart sensors for monitoring in large structures, the costs are greatly reduced and the data processing and information management will be very effective by ways of sensing and onboard computation, wireless transmission, and green energy harvesting. This paper presents a long-term vibration monitoring of the Hwamyung cable-stayed bridge in Korea using an Imote2platformed wireless sensor network. Description (i) Vibration sensor design (ii) Operation software design (i) Sensor placement design (ii) Internet-based remote sensing setup (i) Wireless communication test (ii) Solar power harvesting evaluation (iii) Response signal measurement (iv) Modal analysis and system identification (i) Cable-anchorage monitoring under temperature variation (ii) Effect of dead load (iii) Bridge behavior under typhoons
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