Characterization of inclined surface crack in steel reinforced-concrete by multichannel R-wave measurements

F. W. Lee, H. K. Chai, K. S. Lim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A non-destructive methodology for evaluating concrete surface breaking crack is developed using multichannel measurements of surface Rayleigh waves (R-waves). Numerical simulations were carried out to understand and analyse propagation behaviour of R-waves in steel-reinforced concrete containing a surface crack with varying depths and degree of inclinations. The change in wave parameters, namely velocity and amplitude were examined and quantified to obtain correlations with the depth and inclination of crack. Experimental measurement on a concrete block specimen was then conducted to validate the effectiveness of the methodology, particularly in cases of crack where the generated R-wave wavelength was greater than the crack depth. Experimental assessment results are found to be in decent agreement with the analytical ones, indicating feasibility of the proposed method to acquire elastic wave data and characterize concrete surface crack by analyzing the change of R-waves parameters.

Original languageEnglish
Title of host publication Emerging Technologies in Non-Destructive Testing VI: Proceedings of the 6th International Conference on Emerging Technologies in Non-Destructive Testing (Brussels, Belgium, 27-29 May 2015)
EditorsS. Vanlanduit, T.P. Philippidis, A. Anastasopoulos, D.G. Aggelis, D. Van Hemelrijck
PublisherCRC Press/Balkema
Pages49-54
Number of pages6
ISBN (Print)9781138028845
Publication statusPublished - 24 Nov 2015
Event6th International Conference on Emerging Technologies in Nondestructive Testing, ETNDT 2016 - Brussels, Belgium
Duration: 27 May 201529 May 2015

Conference

Conference6th International Conference on Emerging Technologies in Nondestructive Testing, ETNDT 2016
Country/TerritoryBelgium
CityBrussels
Period27/05/1529/05/15

Keywords

  • Amplitude
  • Excitation frequency
  • Inclination
  • Steel reinforced-concrete
  • Surface crack depth
  • Surface Rayleigh waves
  • Velocity

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