Assessment of Reinforced Concrete Surface Breaking Crack Using Rayleigh Wave Measurement

作者：Lee Foo Wei; Chai Hwa Kian^*; Lim Kok Sing

来源：Sensors (Switzerland), 2016, 16(3): 337.

DOI：10.3390/s16030337

• excitation frequency
• surface Rayleigh wave
• velocity index
• surface breaking crack
• amplitude index
• reinforced concrete

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.

• 出版日期2016-3