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

Zheng, Yue; Wen, Yuan; Pan, Tanbo; Liu, Yongchen; Zhou, Yujue; Zhou, Yubao; Li, Ruizhi

doi:10.1016/j.measurement.2022.111792

Cited by 19 publications

(7 citation statements)

References 51 publications

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“…However, those stages merged at the 9.3% corrosion level because they occurred simultaneously (Figure 9d). These findings regarding severe corrosion conditions are supported by the results of Zheng et al [18], even using bigger scale RC beams fitted with multiple bars and with three damage stages determined during bending tests. They also found that the damage to the uncorroded and lightly corroded beams occurred mainly in the final stage, while the damage to the severely corroded beam occurred earlier, prior to the final stage.…”

Section: Failure Stages Classification With Maximum Ae Amplitudesupporting

confidence: 73%

“…Nevertheless, few studies have investigated the correlations between corroded and healthy RC beams, applying AE techniques. Zheng et al [18] studied the fractal characteristics and evaluated the damage process of corroded beams subjected to four-point bending tests using AE techniques. The analysis of AE ringing counts showed that the damage of concrete and the recorded AE signals could be closely correlated.…”

Section: Literature Reviewmentioning

confidence: 99%

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Fracture Analysis of Short-Scale Corroded/Healthy Reinforced Concrete Beams under Bending Using Acoustic Emission

Seye,

Kawasaki,

Rahimi

2023

Materials

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In this work, the acoustic emission (AE) technique is used to evaluate the fracture process of corroded and healthy reinforced concrete (RC) beams subjected to a monotonic bending test. In fact, many researchers have conducted laboratory experiments considering different conditions to perform rebar corrosion monitoring in RC structures using the AE method. However, previous studies have not investigated the evolution of the bending performance of RC beams at different corrosion degrees, considering the interaction of single rebar with concrete. In this study, healthy and electrically corroded RC beams are evaluated, considering different corrosion levels. The analysis of the moving average of the AE maximum amplitudes was consistent to distinguish four stages of mechanical behavior that the healthy, and corroded specimens with low and medium corrosion levels of 0.9% and 3.2% experienced up to failure. Three damage stages were identified in the case of a high corrosion level of 9.3%. Then, the AE maximum amplitudes were suitable to establish an efficient clustering, which enabled the classification of the fractures into minor, medium, and major classes. Furthermore, the digital analysis method proposed in this study was suitable to visually reveal the influence of the preexisting corrosion-induced damages on the bending failure process of the RC beams.

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Section: Failure Stages Classification With Maximum Ae Amplitudesupporting

confidence: 73%

Section: Literature Reviewmentioning

confidence: 99%

Fracture Analysis of Short-Scale Corroded/Healthy Reinforced Concrete Beams under Bending Using Acoustic Emission

Seye,

Kawasaki,

Rahimi

2023

Materials

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“…Hausdroff, information and correlation dimensions were commonly used for fracture fractal dimension analysis. − Herein, we chose the correlation dimension to analyze the AE signals because of its wide applications. Taking the acoustic emission count sequence as an object, each sequence corresponds to a data set with the number of n .…”

Section: Methodsmentioning

confidence: 99%

Evolution of Acoustic Emission and Microcrack in Jointed Coal under Loading and Their Correlations

Wang,

Guan,

et al. 2023

ACS Omega

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Understanding of continuous damage and cracking process of compressed jointed coal is critical to predict its stability. Herein, for jointed coal under uniaxial compression with bedding planes perpendicular (sample A) and parallel (sample B) to the loading direction, an acoustic emission (AE) monitoring device and a computed tomography (CT) scanner were employed to study the damage and cracking process. Furthermore, the correlations between the AE signals and internal fracture parameters were analyzed. Results show that (1) shear and tension cracks are respectively main damage forms in samples A and B; (2) there is a drop valley of variations of AE count fractal dimension (D 1) over time before the stress peak, and compared with sample B, the drop valley for sample A are much wider; (3) many fractures between joint planes formed at yielding and postpeak stages, fracture fractal dimensions (D 2) first increase slightly with loading and then increase significantly at yielding and postpeak stages; especially D 2 of sample A is larger than that of sample B; (4) the accumulative value of D 1 (AD 1) increases with D 2 monotonously, and an expression of porosity or connectivity of the compressed jointed coal was developed, by which the porosity and connectivity of jointed coal could be calculated. The study outcomes could contribute to predict coal stability and the variations of water and gas flowing channels in seam in underground coal mines.

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“…Terefore, rebar corrosion detection has received considerable attention due to the increasing awareness about the durability and safety of reinforced concrete structures, particularly rebar. To this day, scholars at home and abroad have conducted a lot of research work in the feld of nondestructive testing (NDT) of concrete reinforcement corrosion by mainly including ultrasonic waves technique [10,11], acoustic emission (AE) [12,13], fber optical corrosion sensors (FOCS) [14], electrochemical impedance spectroscopy [15], eddy current testing (ECT) [16], radiography [17], half-cell potential measurements (HCP) [18], infrared thermograph (IT), and self-magnetic fux leakage (SMFL).…”

Section: Introductionmentioning

confidence: 99%

Grading Evaluation of Overall Corrosion Degree of Corroded RC Beams via SMFL Technique

Zhang

Jiang³

et al. 2023

Structural Control and Health Monitoring

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To accurately evaluate the overall corrosion degree of reinforced concrete (RC) beams, on the basis of the SMFL technology, the overall random corrosion detection experiment of six RC beams was carried out. The relationship between the tangential component By and the normal component Bz of the magnetic induction intensity and corrosion degree was analyzed, and a multidefect magnetic dipole model was established. The correlation between the average corrosion ratio C of the RC beam and the magnetic characteristic index KG was emphatically explored. The results showed that, with the increase in the average corrosion ratio C, the magnetic characteristic index KG showed an increasing trend as a whole. The index KG could weaken the influence of different historical magnetizations, but it had a certain dispersion. On the basis of the correlation and the Naive Bayesian model, the average corrosion ratio C was divided into four grades. The probability of C falling in different value ranges can be quantitatively evaluated using the KG magnetic characteristic index. The reliability is as high as 97.4% and as low as 56.8% so as to realize the quantitative grading evaluation of the corrosion of the rebar in the RC beam.

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

Cited by 19 publications

References 51 publications

Fracture Analysis of Short-Scale Corroded/Healthy Reinforced Concrete Beams under Bending Using Acoustic Emission

Fracture Analysis of Short-Scale Corroded/Healthy Reinforced Concrete Beams under Bending Using Acoustic Emission

Evolution of Acoustic Emission and Microcrack in Jointed Coal under Loading and Their Correlations

Grading Evaluation of Overall Corrosion Degree of Corroded RC Beams via SMFL Technique

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