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Kim, Jae Hong
Research Group for Concrete Structures and Materials
Research Interests
  • Mechanics of Concrete, Rheology, Structural Analysis, Construction Performance
  • Rheological investigation for the flow of fresh concrete
  • Multiscale material characterization of suspension

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Improved Rayleigh wave velocity measurement for nondestructive early-age concrete monitoring

Cited 19 times inthomson ciCited 18 times inthomson ci
Title
Improved Rayleigh wave velocity measurement for nondestructive early-age concrete monitoring
Author
Shin, Sung WooYun, Chung BangPopovics, John S.Kim, Jae Hong
Keywords
continuous wavelet transform; finite-element wave-propagation simulation; nondestructive compressive strength monitoring; one-sided technique; Rayleigh wave velocity measurement in concrete; structural health monitoring
Issue Date
2007-01
Publisher
TAYLOR & FRANCIS INC
Citation
RESEARCH IN NONDESTRUCTIVE EVALUATION, v.18, no.1, pp.45 - 68
Abstract
A modified one-sided technique is proposed for Rayleigh wave (R-wave) velocity measurement in concrete. Wave scattering from material heterogeneity and near-field effects may disrupt sensed R-wave signals in concrete, which is manifested as signal dispersion. Conventional one-sided measurement techniques for concrete do not consider dispersion of R-waves. In this study, the maximum energy arrival concept is adopted to determine the wave velocity by employing continuous wavelet transform. Experimental and numerical studies are performed to show the effectiveness of the proposed method. The method is applied to monitor the strength development of early-age concrete exposed to various curing conditions. Results reveal that the proposed method can be effectively used to measure the R-wave velocity in concrete structures and further to monitor the development of compressive strength in early-age concrete, regardless of the concrete moist curing condition.
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DOI
10.1080/09349840601128762
ISSN
0934-9847
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UEE_Journal Papers
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