Computers and Concrete

  • 제20권3호
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  • Pages.257-262
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  • 2017
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Guided wave analysis of air-coupled impact-echo in concrete slab

  • 투고 : 2017.07.24
  • 심사 : 2017.08.17
  • 발행 : 2017.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study aims to develop a signal processing scheme to accurately predict the thickness of concrete slab using air-coupled impact-echo. Air-coupled impact-echo has been applied to concrete non-destructive tests (NDT); however, it is often difficult to obtain thickness mode frequency due to noise components. Furthermore, apparent velocity in concrete is a usually unknown parameter in the field and the thickness of the concrete slab often cannot be accurately measured. This study proposes a signal processing scheme using guided wave analysis, wherein dispersion curves are drawn in both frequency-wave number (f-k) and phase velocity-frequency ($V_{cp}-f$) domains. The theoretical and experimental results demonstrate that thickness mode frequency and apparent velocity in concrete are clearly obtained from the f-k and $V_{cp}-f$ domains, respectively. The proposed method has great potential with regard to the application of air-coupled impact-echo in the field.

키워드

참고문헌

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피인용 문헌

  1. Deep learning models for bridge deck evaluation using impact echo vol.263, pp.None, 2017, https://doi.org/10.1016/j.conbuildmat.2020.120109
  2. The prediction of compressive strength and non-destructive tests of sustainable concrete by using artificial neural networks vol.27, pp.1, 2017, https://doi.org/10.12989/cac.2021.27.1.021