Damage Assessment of Reinforced Concrete Beams Under Flexural Failure Mode Using Acoustic Emission Testing 


Vol. 38,  No. 2, pp. 36-43, Apr.  2023
10.14346/JKOSOS.2023.38.2.36


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  Abstract

In this study, a four-point bending test was conducted to assess and detect the damage to reinforced concrete structures using the acoustic emission (AE) technique. Based on the crack investigation results, flexural failure was classified into four stages and compared with the characteristic analysis results of AE parameters. The parametric characterization indicated that the activity of the primary AE signal was high in the early stage, and that of the second signal increased after the flexural cracks stabilized. Because the secondary AE signal included noise generated by friction, parameter-based analysis for damage assessment was performed using the primary signal; the secondary signal was used as complement. The activity analyses of the primary and secondary signals effectively classified crack propagation; however, determining the macrocracks and yielding of reinforcing bars had certain limitations. Nevertheless, applying the damage index with cumulative AE energy is a complementary technique for detecting and assessing structure damage that well detects the occurrence of macrocracks.

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  Cite this article

[IEEE Style]

김다위, 이성로, 박원석, "Damage Assessment of Reinforced Concrete Beams Under Flexural Failure Mode Using Acoustic Emission Testing," Journal of the Korean Society of Safety, vol. 38, no. 2, pp. 36-43, 2023. DOI: 10.14346/JKOSOS.2023.38.2.36.

[ACM Style]

김다위, 이성로, and 박원석. 2023. Damage Assessment of Reinforced Concrete Beams Under Flexural Failure Mode Using Acoustic Emission Testing. Journal of the Korean Society of Safety, 38, 2, (2023), 36-43. DOI: 10.14346/JKOSOS.2023.38.2.36.

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