Fractal characteristics and damage evaluation of corroded beams under four-point bending tests based on acoustic emission techniques

Yonglai Zheng, Yuan Wen, Tanbo Pan*, Yongcheng Liu, Yujue Zhou, Ruizhi Li, Yubao Zhou

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This study investigated the relationship between the acoustic emission (AE) signals parameter sequence fractal characteristics and the damage evolution information of corroded reinforced concrete (RC) beams under four-point bending. Strength deterioration behavior and AE data can be obtained by coupling the four-point bending test and the AE monitoring. The results show that AE ringing counts of corroded and uncorroded beams had prominent fractal characteristics. The fractal dimension values of corroded RC beams all showed a fluctuating rise to a peak and then a sharp drop before the failure. The damage index corresponding to the peak point decreases with the increase of corrosion degree. Fractal dimension peak point could be used as an early warning point for corroded RC beams' failure. Moreover, the AE fractal dimension analysis can effectively reflect the pattern of crack development, which have an important value for evaluating the process of corroded RC beams rupture.

Original languageEnglish
Article number111792
JournalMeasurement: Journal of the International Measurement Confederation
Volume202
DOIs
Publication statusPublished - 2022

Keywords

  • Acoustic emission
  • Concrete fracture monitoring
  • Damage assessment
  • Fractal Characteristics
  • Steel corrosion

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