Fatigue damage severity assessment of RC beam
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 23 September 2019
Issue publication date: 23 September 2019
Abstract
Purpose
The purpose of this paper is to present the investigation of damage severity of reinforced concrete (RC) beam subjected to increasing fatigue loading using intensity of acoustic emission (AE) signal.
Design/methodology/approach
Together 17 RC beams with dimension of 150 × 150 × 750 mm were prepared. Third point loading fatigue test was performed based on load at the first crack (Pcr) and the ultimate static load (Pult). The frequency of 1 Hz was used with the increasing fatigue loadings, 0.5Pcr (P1), 0.8Pcr (P2), 1.0Pcr (P3), 0.2Pult (P4), 0.5Pult (P5) and 0.6Pult (P6). The damage severity of crack for each phase of loading allowed the identification of the crack modes of the beams, namely, Zone A (no significant emission), Zone B (minor), Zone C (intermediate), Zone D (follow-up) and Zone E (major).
Findings
The intensity analysis indicated clear trend with respect to crack propagation in the beam and, hence, can be used to monitor the crack occurrence in the beam.
Originality/value
The intensity analysis has been carried out for the beam subjected to increasing fatigue loading. The analysis was based on the AE data obtained from channel basis and located event.
Keywords
Acknowledgements
The authors would like to acknowledge the Minister of Higher Education (Malaysia) and RMI, Universiti Teknologi MARA (UiTM) for providing the financial support for this research. The authors would also like to acknowledge all assistant engineers who involved in this research.
Citation
Md Nor, N., Mat Saliah, S.N., Ibrahim, A., Mohd Saman, H. and Muhamad Bunnori, N. (2019), "Fatigue damage severity assessment of RC beam", International Journal of Structural Integrity, Vol. 10 No. 5, pp. 612-620. https://doi.org/10.1108/IJSI-05-2019-0043
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited