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 language | English |
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Pages (from-to) | 113-123 |
Journal | ACI Materials Journal |
Volume | 116 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2019 |
Keywords / Materials (for Non-textual outputs)
- reinforced-concrete
- sub-surface crack
- Rayleigh wave
- amplitude
- velocity
- excitation frequency