Experimental and Numerical Investigation on the Reinforcement Cover to Concrete Surface Using Eddy Current

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, University of Birjand, Birjand, Iran.

2 Department of Mechanical Engineering, University of Birjand, Birjand, Iran

3 School of Mechanical Engineering, Iran University of Science and Technology

Abstract

Non-destructive testing is one of the techniques which is used to ensure the health in concrete structures. To reinforce a concrete column, it is necessary to know the number of embedded reinforcements in the concrete and the reinforcement cover to the concrete surface. In the present paper, the finite element method was employed to obtain the reinforcement cover to the concrete surface in a concrete column using Maxwell commercial software. Then, a measuring probe was designed and fabricated. In the presence of a coil with a ferrite core, the conductive reinforcement interacts with low[1]frequency electromagnetic waves. The location of the reinforcement could be estimated measuring effects of these waves on the concrete surface. The designed probe was investigated in different distances and frequencies. The reinforcement cover to the concrete surface could be estimated through variations of inductance and ohmic resistance of a coil in a constant frequency and voltage. The full factorial design of experiments method was applied to investigate influences of the reinforcement cover to concrete surface and frequency on ohmic resistance and inductance of the measurement probe and a regression model was proposed for effective parameters. Finally, a neural network was used to estimate the reinforcement cover to concrete surface based on the frequency and ohmic resistance of the measuring probe.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 10
January 2021
Pages 2791-2808

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