Guided wave analysis of air-coupled impact-echo in concrete slab
- Authors
- Choi, Hajin; Azari, Hoda
- Issue Date
- Sep-2017
- Publisher
- TECHNO-PRESS
- Keywords
- concrete; concrete technology; non-destructive tests (NDT); structural health monitoring (SHM); structural safety
- Citation
- COMPUTERS AND CONCRETE, v.20, no.3, pp.257 - 262
- Journal Title
- COMPUTERS AND CONCRETE
- Volume
- 20
- Number
- 3
- Start Page
- 257
- End Page
- 262
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/39289
- DOI
- 10.12989/cac.2017.20.3.257
- ISSN
- 1598-8198
- Abstract
- 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.
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Collections - College of Engineering > School of Architecture > 1. Journal Articles
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