Mr. Sung-Jin Chang Profile

Sung-Jin Chang

at Pusan National Univ

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Proceedings Article | 22 April 2013 Paper

Development of smart seismic bridge bearing using fiber optic Bragg-grating sensors

Sung-Jin Chang, Nam-Sik Kim

Proceedings Volume 8692, 869228 (2013) https://doi.org/10.1117/12.2009629

KEYWORDS: Sensors, Bridges, Fiber Bragg gratings, Error analysis, Fiber optics sensors, Polyurethane, Fiber optics, Beam shaping, Environmental sensing, Civil engineering

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After a bridge was completed, a faulting at supporting point may occur because of the unexpected loads to bridge bearing. Serviceability of bridges could be impaired by the faulting which had caused structural damage. Therefore, it is needed for a smart bridge bearing which can observe the supporting points continuously. Some of bridge bearings have been developed for measuring vertical load and vertical displacement by installing sensors in the bearing. However in those systems, it is not easy to be replaced with new sensors when repairs are needed. In this study, the smart bridge bearing of which sensors can be replaced has been developed to overcome such a problem. In this study, strain signals were used for measuring both vertical displacements and loads. Smart bridge bearings based on FBG sensors consist of EQS(Eradi Quake System) which has been commercially used for seismic bridge bearings. Experiments were carried out to prove applicability of the smart bridge bearing based on FBG sensors that can measure vertical displacements and loads.

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