Assessment of reinforced concrete surface breaking crack using Rayleigh wave measurement

Foo Wei Lee, Hwa Kian Chai*, Kok Sing Lim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

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.

Original languageEnglish
Article number337
JournalSensors (Switzerland)
Volume16
Issue number3
DOIs
Publication statusPublished - 5 Mar 2016

Keywords / Materials (for Non-textual outputs)

  • Amplitude index
  • Excitation frequency
  • Reinforced concrete
  • Surface breaking crack
  • Surface Rayleigh wave
  • Velocity index

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