3 April 2012 Structural behavior of concrete box bridge using embedded FBG sensors
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Abstract
For the structural monitoring of railway bridges, electromagnetic interference (EMI) is a significant problem as modern railway lines are powered by high-voltage electric power feeding systems. Fiber optic sensing systems are free from EMI and have been successfully applied in civil engineering fields. This study presents the application of fiber Bragg grating (FBG)-based sensing systems to precast concrete box railway bridges. A 20 m long full-scale precast concrete box railway girder was fabricated and tested in order to identify its static performance. The experimental program involved the measurement of the nonlinear static behavior until failure. Multiplexed FBG strain sensors were embedded along the length of steel rebar and a strain-induced wavelength shift was measured in order to monitor internal strains. The measured values from the FBG-based sensors are compared with the results using electric signal-based sensors. The results show that the FBG sensing system is promising and can improve the efficiency of structural monitoring for modern railway bridges.
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Wonseok Chung, Donghoon Kang, "Structural behavior of concrete box bridge using embedded FBG sensors", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83451X (3 April 2012); doi: 10.1117/12.920946; https://doi.org/10.1117/12.920946
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KEYWORDS
Fiber Bragg gratings

Sensors

Bridges

Fiber optics sensors

Sensing systems

Multiplexing

Electromagnetic coupling

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