Development of a Bridge Weigh-in-Motion System Based on Long-Gauge Fiber Bragg Grating Sensors
Publication: Journal of Bridge Engineering
Volume 23, Issue 9
Abstract
Monitoring the weight of vehicles is essential for policymakers to maintain the condition of bridges. In the group of methods for weighing vehicles, bridge weigh-in-motion (B-WIM) systems are among the most prominent and have several advantages, such as convenience and no interruption to traffic. However, they still have one drawback in that, for most systems, a vehicle’s velocity and wheelbase need to be given in advance. Currently, this problem is usually solved by adding an axle detector, which leads to higher costs. Under such circumstances, this paper presents an alternative B-WIM system to measure a vehicle’s velocity, wheelbase, and axial and gross weight merely based on a single set of long-gauge fiber Bragg grating (FBG) sensors without additional devices. To test the effectiveness of this method under various conditions, a vehicle-bridge interaction (VBI) system simulation was performed based on the result of an indoor experiment. Also, an in situ test on an expressway bridge was performed to initially verify its feasibility. The results showed that this method can achieve its function with good accuracy under various conditions.
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Acknowledgments
The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Nos. 51525801, 51708106, and 51708112), the Fundamental Research Funds for the Central Universities (No. 2242017k30002), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (No. 1105007002).
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 9 • September 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Oct 27, 2017
Accepted: Mar 30, 2018
Published online: Jul 9, 2018
Published in print: Sep 1, 2018
Discussion open until: Dec 9, 2018
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