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Strain Monitoring of Strengthened RC Beams with Hybrid Fiber Reinforced Polymer(FRP) Laminates by FBG Sensor
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 Title & Authors
Strain Monitoring of Strengthened RC Beams with Hybrid Fiber Reinforced Polymer(FRP) Laminates by FBG Sensor
Hong, Geon-Ho; Shin, Yeong-Soo; Choi, Eun-Gyu;
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The reinforced concrete(RC) structures strengthened with fiber reinforced plastic(FRP) has been accepted by the construction engineering community for rehabilitation. FRP composites can present many advantages like a corrosion resistance, strength-weight ratio, relatively short application time, and cost effectiveness. The beams under design load, however, are cracked and result in degrading the strength. It is difficult to recognize cracks and deflections on the surface of the concrete members retrofitted with FRP through the life cycle. For these reasons, if they result in the effects, which were below the expected strength, we must monitor the state of concrete structures all the time in order to take an appropriate measure. Fiber Bragg Grating(FBG) sensor excel as monitoring of investigating the stress state of the retrofitted beams with FRP. The main objective of this study is to measure strain by experiment and analyze the behavior of RC beams retrofitted with FRP using FBG sensor. The kinds of FRP which were used in research are carbon, glass and improved hybrid FRP(IFRP) that has capacity than any other FRP. Other variables are the length of FRP, the number of sheet.
FRP;CFRP;GFRP;monitoring;FBG sensor;
 Cited by
C. Allen Ross, David M. Jerome, Joseph W. Tedesco, and Mary L. Hughes. 'Strengthening of Reinforced Concrete Beams with Externally Bonded Composite Laminates', ACI Structural Journal, No. 96-S23, 1999, pp.212-220

Kin- Tak Lau, Libo Yuan, Li-Min Zhou, Jingshen Wu, and Chung-Ho Woo, 'Strain Monitoring in FRP Laminates and Concrete Beam using FBG', ELSEVIER, Composite Structure, 2001, pp.9-20

Kin-Tak Lau, Chi-Chiu Chan, Li-Min Zhou, and Wei jin, 'Strain Monitoring in Composite Strengthened Concrete Structures Using Optical Fiber Sensors', ELSEVIER, Composite Structure Part B, 2000, Aug. pp.33-45

Ki-Soo Kim, Ho-Joon Lee, and Jong-Oo Kim, 'Structural Health Monitoring System with Optical Fiber Sensors', Magazine of the Korea Concrete Institute, Vol.12 No.3, 2000, May

O. Rabinovich and Y. Frostig 'Nonlinear High-order Analysis of Cracked RC Beams Strengthened with FRP Strips', Journal of Engineering, 2001, Aug., pp.281-289