Applications of Fiber Bragg Grating in Strain Measurement of Concrete Bridge

Abstract:

In order to verify the role of fiber bragg grating strain gauge in strain measurement of concrete bridge, and the influence of concrete and steel strain properties by fatigue loading, the relevant experimental researches were carried out. The results indicated that the Fiber Bragg grating strain gauge could reflect the strain regularity of concrete and steel well; for the fiber grating strain rosettes inside the concrete, the pasting equipments of fiber gratings had a certain impact of the measurement effect. The fatigue loading had a certain impact of the properties of concrete and steel, in conditions of the same number of fatigue, the greater the stress amplitude the more obvious the effects. The results analysis shown that, fiber grating strain measurement innovated the means and methods of strain measurement in detailed structure of the concrete bridge, for the strain measurements of concrete bridge under fatigue loading, the FBG could still play very good effect.

• Periodical: Advanced Materials Research (Volumes 368-373)
• Pages: 2286-2290
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.368-373.2286
• Online since: October 2011
• Authors: Xian Xi Tang, Xian Zhou Tang, Yue Xu, Wei Guo
• Keywords: Concrete Bridge, Fatigue Loading, Fiber Bragg Grating (FBG), Strain Measurement

References

[1] Li H.N., Ren L.. Structural health monitoring fiber Bragg grating sensor technology[M]. Beijing: China Building Industry Press, 2008(In Chinese).

[2] Leng J S, Asundi A. NDE of smart structures using multimode fiber optic vibration sensor[J]. NDT and E International, 2002, 35(1):45-51.

DOI: 10.1016/s0963-8695(01)00024-x

[3] Pan S. X., Liu Y. W.. Appl ications of Optical Fiber Sensors to Seismic Precursor Observation of Hydro-geochemistry and Its Prospects[J]. Seismological, 2001, 12: 9-14(In Chinese).

[4] Mendez A, Morse T F, Mendez F. Applications of embedded optical fiber sensors in reinforced concrete buildings and structures[J]. Proc. SPIE, Fiber Optic Smart Structures and Skins II, 1990, 1170: 60-69.

DOI: 10.1117/12.963084

[5] Kuang Q. Q., Liu Y. D., Sang M. H., Nie Y. Y.. The Principle of Fiber Grating Sensor and the Study on Its Utility Key Problem[[J]. Journal of Jiangxi Normal University(Natural Science), 2008, 32(1): 58-61(In Chinese).

[6] Peng B. J., Liao Y. B., Zhang M., Shen Y. Q., Jin H. Z., Lai S. R.. New method of measuring fibers'valid elastic_optic constant[J]. Optical technique, 2005, 31(5):655-658(In Chinese).