Study of stress-induced velocity variation in concrete under direct tensile force and monitoring of the damage level by using thermally-compensated Coda Wave Interferometry - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ultrasonics Année : 2012

Study of stress-induced velocity variation in concrete under direct tensile force and monitoring of the damage level by using thermally-compensated Coda Wave Interferometry

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In this paper, we describe an experimental study of concrete behavior under a uniaxial tensile load by use of the thermally-compensated Coda Wave Interferometry (CWI) analysis. Under laboratory conditions, uniaxial tensile load cycles are imposed on a cylindrical concrete specimen, with continuous ultrasonic measurements being recorded within the scope of bias control protocols. A thermally-compensated CWI analysis of multiple scattering waves is performed in order to evaluate the stress-induced velocity variation. Concrete behavior under a tensile load can then be studied, along with CWI results from both its elastic performance (acoustoelasticity) and plastic performance (microcracking corresponding to the Kaiser effect). This work program includes a creep test with a sustained, high tensile load; the acoustoelastic coefficients are estimated before and after conducting the creep test and then used to demonstrate the effect of creep load.

  • Concrete’s behaviors under direct tensile load are studied using ultrasonic method.
  • Thermally-compensated CWI provides accurate stress-induced velocity variation (αF).
  • With αF, we have clear observations of Kaiser effect and acoustoelastic effect.
  • Effective acoustoelastic coefficient β is estimated as a nonlinear parameter.
  • β shows a higher sensitivity to the creep damage of concrete than αF.
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hal-01007343 , version 1 (03-03-2017)

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Yuxiang Zhang, Odile Abraham, Frédéric Grondin, Ahmed Loukili, Vincent Tournat, et al.. Study of stress-induced velocity variation in concrete under direct tensile force and monitoring of the damage level by using thermally-compensated Coda Wave Interferometry. Ultrasonics, 2012, 52 (8), pp.1038-1045. ⟨10.1016/j.ultras.2012.08.011⟩. ⟨hal-01007343⟩
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