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Sensors 2016, 16(3), 337; doi:10.3390/s16030337

Assessment of Reinforced Concrete Surface Breaking Crack Using Rayleigh Wave Measurement

1
Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
2
Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 8 December 2015 / Revised: 1 March 2016 / Accepted: 2 March 2016 / Published: 5 March 2016
(This article belongs to the Section Physical Sensors)

Abstract

An improved single sided Rayleigh wave (R-wave) measurement was suggested to characterize surface breaking crack in steel reinforced concrete structures. Numerical simulations were performed to clarify the behavior of R-waves interacting with surface breaking crack with different depths and degrees of inclinations. Through analysis of simulation results, correlations between R-wave parameters of interest and crack characteristics (depth and degree of inclination) were obtained, which were then validated by experimental measurement of concrete specimens instigated with vertical and inclined artificial cracks of different depths. Wave parameters including velocity and amplitude attenuation for each case were studied. The correlations allowed us to estimate the depth and inclination of cracks measured experimentally with acceptable discrepancies, particularly for cracks which are relatively shallow and when the crack depth is smaller than the wavelength. View Full-Text
Keywords: reinforced concrete; surface breaking crack; surface Rayleigh wave; velocity index; amplitude index; excitation frequency reinforced concrete; surface breaking crack; surface Rayleigh wave; velocity index; amplitude index; excitation frequency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lee, F.W.; Chai, H.K.; Lim, K.S. Assessment of Reinforced Concrete Surface Breaking Crack Using Rayleigh Wave Measurement. Sensors 2016, 16, 337.

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