Determination and extraction of Rayleigh-waves for concrete cracks characterization based on matched filtering of center of energy

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Surface Rayleigh wave (R-wave) has been used to detect and characterize defects in concrete due to its unique propagation properties. However, the determination of R-wave component is still ill-defined. In the present paper, a finite difference wave equation is employed for the numerical simulations of a transient point source interacting with a surface-opening crack on concrete. The compression wave (P-wave) and R-wave components were extracted and identified based on a new algorithm that utilizes matched filtering of center of energy (MFCE) concept to correlate wave parameters with crack depth. Experimental excitation and acquisition of R-waves was then carried out on concrete block specimens with artificial surface-opening crack to verify the correlations obtained via simulations. Experimental results are found to be in good agreement with the numerical ones, justifying the feasibility of the proposed method to determine and extract R-wave components for use in estimating depths of concrete crack.

Original languageEnglish
Pages (from-to)303-315
Number of pages13
JournalJournal of Sound and Vibration
Volume363
DOIs
Publication statusPublished - 17 Feb 2016

Keywords

  • Compression wave
  • Concrete
  • Matched filtering of center of energy
  • Surface Rayleigh wave
  • Surface-opening crack

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