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Non-contact assessment of thermal damage of concrete using a nonlinear wave modulation technique
Author(s): Yuning Wu; Jun Chen
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Paper Abstract

In this paper, development of a nonlinear vibro-acoustic modulation technique based on non-contact piezoelectric sensors was investigated to detect the crack progression of concrete cracking caused by thermal treatments. Experimental results show that defined ultrasonic nonlinear parameter is in agreement with the accumulation of thermal crack. The phase velocity of Rayleigh wave and resonance frequency of vibrations were measured and compared with ultrasonic nonlinear parameter to validate the sensitivity of developed method. X-ray Computed Tomography (CT) technique is applied to visualize microstructure of thermal damage. The CT images show that proposed nonlinear parameter is reliable and well correlated with the microstructural defects of concrete specimen. Due to the advantage of removable characteristic of non-contact ultrasonic measurements, the developed non-contact nonlinear wave modulation method could be promising for quick and convenient damage assessment of concrete structures in engineering practice.

Paper Details

Date Published: 1 April 2019
PDF: 11 pages
Proc. SPIE 10971, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII, 109710R (1 April 2019); doi: 10.1117/12.2513995
Show Author Affiliations
Yuning Wu, Beihang Univ. (China)
Jun Chen, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 10971:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII
Andrew L. Gyekenyesi, Editor(s)

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