Simulation of fiber Bragg grating sensor for rebar corrosion

Jiang Geng; Jin Wu; Xinming Zhao

doi:10.1117/12.840342

20 October 2009 Simulation of fiber Bragg grating sensor for rebar corrosion

Jiang Geng, Jin Wu, Xinming Zhao

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 74931I (2009) https://doi.org/10.1117/12.840342
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

It is world widely concerned in the durability of reinforced concrete structures. Corrosion of rebar is one of the most important factors which can affect the durability of the concrete structures, and may result in damage to the structures in the form of expansion, cracking and eventually spalling of the cover concrete. In addition, the structural damage may be due to loss of bond between reinforcement and concrete and reduction of reinforcement cross-sectional area, and finally it may cause structure failure. With the advantages of linear reaction, small volume, high anti-erosion capability and automatic signal transmission, the smart sensors made of fiber bragg grating (FBG) to monitor strain, stress, temperature and local crack have got wide application in buildings, bridges and tunnels. FBG can be adhered to the surface of the structure, and also can be embedded into the inner of the structures when the project is being under construction to realize the real-time health monitoring. Based on volume expansion, the fiber bragg grating sensor for rebar corrosion is designed. The corrosion status of the structure can be obtained from the information provided by sensors. With the aid of the finite element software ANSYS, the simulation of the corrosion sensor was carried in this paper. The relationship between corrosion ratio and the shift of wavelength was established. According to the results of the simulation, there were differences between simulated results and measured results. The reason of the differences was also studied in this paper.

Citation Download Citation

Jiang Geng, Jin Wu, and Xinming Zhao "Simulation of fiber Bragg grating sensor for rebar corrosion", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74931I (20 October 2009); https://doi.org/10.1117/12.840342

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