Advances in air-coupled lamb wave scanning

Alex Gibson, Nils Ryden, John S Popovics

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

Abstract

Impact-echo is an effective method for the nondestructive evaluation of in-situ concrete members and has progressively developed over the past 20 years. This study outlines recent advances in the adoption of microphone-based signal acquisition in order to perform rapid non-contact impact echo scanning, in the context of the recently proposed Lamb wave dispersion hypothesis. Various challenges associated with noise control, data acquisition, processing and imaging are addressed. Data obtained from scanning a control slab over a range of source-receiver separations are presented alongside results from traditional point-by-point impact-echo testing. Potential applications of this method include rapid thickness profiling of large structures and identification of flaws in concrete pavements, reinforced concrete pipes, bridge decks, as well as quality assurance of grouting in post-tensioning tendon ducts.

Original languageEnglish (US)
Title of host publicationEnvironmental and Engineering Geophysical Society - 20th, SAGEEP 2007
Subtitle of host publicationGeophysical Investigation and Problem Solving for the Next Generation
Pages146-155
Number of pages10
Volume1
StatePublished - 2007
Event20th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Investigation and Problem Solving for the Next Generation, SAGEEP 2007 - Denver, CO, United States
Duration: Apr 1 2007Apr 5 2007

Other

Other20th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Investigation and Problem Solving for the Next Generation, SAGEEP 2007
CountryUnited States
CityDenver, CO
Period4/1/074/5/07

ASJC Scopus subject areas

  • Geophysics
  • Geotechnical Engineering and Engineering Geology
  • Environmental Engineering

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    Gibson, A., Ryden, N., & Popovics, J. S. (2007). Advances in air-coupled lamb wave scanning. In Environmental and Engineering Geophysical Society - 20th, SAGEEP 2007: Geophysical Investigation and Problem Solving for the Next Generation (Vol. 1, pp. 146-155)