Acoustic emission characterization of steel fibre reinforced concrete during bending

D. G. Aggelis; D. V. Soulioti; N. Sapouridis; N. M. Barkoula; A. S. Paipetis; T. E. Matikas

doi:10.1117/12.847396

8 April 2010 Acoustic emission characterization of steel fibre reinforced concrete during bending

D. G. Aggelis, D. V. Soulioti, N. Sapouridis, N. M. Barkoula, A. S. Paipetis, T. E. Matikas

Proceedings Volume 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010; 764912 (2010) https://doi.org/10.1117/12.847396
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

The acoustic emission (AE) behaviour of steel fibre reinforced concrete is studied in this paper. The experiments were conducted in four-point bending with concurrent monitoring of AE signals. The sensors used, were of broadband response in order to capture a wide range of fracturing phenomena. The results indicate that AE parameters undergo significant changes much earlier than the final fracture of the specimens, even if the AE hit rate seems approximately constant. Specifically, the Ib-value which takes into account the amplitude distribution of the recent AE hits decreases when the load reaches about 60-70 % of its maximum value. Additionally, the average frequency of the signals decreases abruptly when a fracture incident occurs, indicating that matrix cracking events produce higher frequencies than fibre pull-out events. It is concluded that proper study of AE parameters enables the characterization of structural health of large structures in cases where remote monitoring is applied.

Citation Download Citation

D. G. Aggelis, D. V. Soulioti, N. Sapouridis, N. M. Barkoula, A. S. Paipetis, and T. E. Matikas "Acoustic emission characterization of steel fibre reinforced concrete during bending", Proc. SPIE 7649, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2010, 764912 (8 April 2010); https://doi.org/10.1117/12.847396

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