The stress-induced surface wave velocity variations in concrete

Agustin Spalvier, James Bittner, Sai Kalyan Evani, John S. Popovics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This investigation studies the behavior of surface wave velocity in concrete specimens subjected to low levels of compressive and tensile stress in beams from applied flexural loads. Beam specimen is loaded in a 4-point-load bending configuration, generating uniaxial compression and tension stress fields at the top and bottom surfaces of the beam, respectively. Surface waves are generated through contactless air-coupled transducers and received through contact accelerometers. Results show a clear distinction in responses from compression and tension zones, where velocity increases in the former and decreases in the latter, with increasing load levels. These trends agree with existing acoustoelastic literature. Surface wave velocity tends to decrease more under tension than it tends to increase under compression, for equal load levels. It is observed that even at low stress levels, surface wave velocity is affected by acoustoelastic effects, coupled with plastic effects (stress-induced damage). The acoustoelastic effect is isolated by means of considering the Kaiser effect and by experimentally mitigating the viscoelastic effects of concrete. Results of this ongoing investigation contribute to the overall knowledge of the acoustoelastic behavior of concrete. Applications of this knowledge may include structural health monitoring of members under flexural loads, improved high order modelling of materials, and validation of results seen in dynamic acoustoelasticity testing.

Original languageEnglish (US)
Title of host publication43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36
EditorsLeonard J. Bond, Dale E. Chimenti
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414747
DOIs
StatePublished - Feb 16 2017
Event43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2016 - Atlanta, United States
Duration: Jul 17 2016Jul 22 2016

Publication series

NameAIP Conference Proceedings
Volume1806
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2016
CountryUnited States
CityAtlanta
Period7/17/167/22/16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Spalvier, A., Bittner, J., Evani, S. K., & Popovics, J. S. (2017). The stress-induced surface wave velocity variations in concrete. In L. J. Bond, & D. E. Chimenti (Eds.), 43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 36 [080010] (AIP Conference Proceedings; Vol. 1806). American Institute of Physics Inc.. https://doi.org/10.1063/1.4974635