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Monitoring of a Steel Plate Girder Railroad Bridge with Fiber Bragg Grating Sensors

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Abstract:

This study investigates an existing steel plate girder railroad bridge in order to monitor static and dynamic responses using fiber Bragg grating (FBG) sensors. This paper also presents an experimental technique to estimate the vertical deflection of the bridge using FBG sensors. Seven FBG sensors are multiplexed in a single optical fiber and installed in parallel pairs along the length of the bridge, with one set on the top flange and the other on the bottom flange. The train passes over the bridge at different speeds, ranging from 10 km/h to 90 km/h, so as to monitor the dynamic response of the bridge. The results show that the proposed instrumentation technique is capable of estimating the deflection of the bridge for various loading conditions, which is crucial in structural monitoring.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

264-267

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.264

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Online since:

October 2006

Authors:

Won Seok Chung, Dong Hoon Kang, Eun Soo Choi, Hyun Min Kim

Keywords:

Deflection, Dynamic, Fiber Bragg Grating (FBG), Multiplexing, Steel Plate Railroad Bridge

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

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1 2 3 4 5 6 -1.

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[1] [2] [3] [4] [5] [6] FBG LVDT FEM Elapsed time (sec).

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5 10 15 20 25 -1.

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[1] [2] [3] [4] [5] [6] Elapsed time (sec) FBG LVDT FEM.

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1 2 3 4 5 6 -1.

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[1] [2] [3] [4] [5] [6] Elapsed time (sec) FBG LVDT.

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10 20 30 40 50 60.

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[1] [2] [3] [4] [5] [6] Deflection (mm) Elapsed time (sec) FBG LVDT.

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