Journal
SENSORS
Volume 20, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/s20144031
Keywords
coda wave interferometry; acoustoelastic modulus; Kaiser effect; stress recovery in concrete; nondestructive testing
Funding
- WiSys Applied Research Funding programs (AR-WiTAG 2018)
- MOT. P. R. China [2013-318-223-040]
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This article presents an experimental study of estimating stresses in concrete by applications of coda wave interferometry to establish an acoustoelastic modulus database. Under well-controlled laboratory conditions, uniaxial load cycles were performed on three groups of 15 x 15 x 35-cm concrete prisms, with ultrasonic signals being collected continuously. Then, the coda wave interferometry technique, together with acoustoelastic and Kaiser theories, are utilized to analyze the stress-velocity relations for the distinct ranges before and after historical maximum loads, forming an acoustoelastic modulus database. When applied to different concrete samples, their stresses are estimated with a high degree of accuracy. This study could be used to promote the development of novel nondestructive techniques that aid in structural stress monitoring.
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