Concrete Sub-surface Crack Characterisation by Means of Surface Rayleigh Wave Method

Foo Wei Lee (Lead Author), Hwa Kian Chai, Kok-Sing Lim, See Hung Lau

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

A multichannel linear array Rayleigh wave (R-wave) methodology is studied for evaluating sub-surface cracks on concrete. Numerical simulations were first conducted to understand the propagation of R-waves in steel-reinforced concrete comprising of sub-surface crack with different depths and lengths followed by a series of experimental measurements on concrete samples with induced artificial sub-surface cracks. The change in R-wave amplitude and velocity were analysed to obtain correlations with the crack depth-to-wavelength/ length-to-wavelength ratio. Results revealed that the difference between the estimated and actual characteristics of sub-surface cracks (crack length and depth) was less than ± 20%, showing a possibility for using R-waves methodology to assess sub-surface cracks in reinforced concrete with the proposed acquisition, extraction and analysis methodology.
Original languageEnglish
Pages (from-to)113-123
JournalACI Materials Journal
Issue number1
Publication statusPublished - 1 Jan 2019

Keywords / Materials (for Non-textual outputs)

  • reinforced-concrete
  • sub-surface crack
  • Rayleigh wave
  • amplitude
  • velocity
  • excitation frequency


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