Effect of corrosion of reinforcement on the mechanical behaviour of highly corroded RC beams

Zhu, Wenjun; François, Raoul; Coronelli, Dario; Cleland, David

doi:10.1016/j.engstruct.2013.04.017

Cited by 118 publications

(44 citation statements)

References 19 publications

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“…The results of various experiments performed by François (2014, 2015) and Zhu et al (2013) showed that about 1% loss in cross-sectional area of longitudinal reinforcement leads to about 1% decrease in relative yield strength and 0.85% reduction in ultimate capacity. However, this was found to be the result of the concrete crushing.…”

Section: Driftmentioning

confidence: 99%

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Kashani

Maddocks

Dizaj³

2019

J. Bridge Eng.

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The current paper provides a comprehensive review of experimental studies on corrosion damaged reinforced concrete (RC) components, and the ability of current state-of-the-art numerical models to predict the residual capacity of these corroded RC components. The experimental studies on corroded RC components are classified into five different categories including: (i) beams in flexure, (ii) beams in shear, (iii) columns under pure axial compression, (iv) circular columns in flexure, and (v) rectangular columns in flexure. For each group, a summary of all the previous research are provided. Through the regression analyses, the experimental results of each abovementioned groups are used to examine the adverse effect of corrosion on ductility and, flexural, shear, and axial capacity loss of the corroded RC components. Finally, the observed results of the previous experimental studies are compared with the predicted values using the state-of-the-art numerical models currently available in the literature. The summarised experimental results show that corrosion has much more adverse impact on ductility of the RC columns than strength. However, the effect of corrosion on ductility and strength reduction of RC beams is the same. Moreover, results of cross-sectional moment-curvature analyses using the state-of-the-art corrosion damage models show a good correlation between the predicted residual flexural capacity and observed experimental results. Finally, the existing shortcomings in the literature and open issues to be addressed in the future research are discussed, and some recommendations are provided.

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Section: Driftmentioning

confidence: 99%

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Kashani

Maddocks

Dizaj³

2019

J. Bridge Eng.

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“…The beam considered in this paper belongs to Group B. Detailed information on the corroded beams is available in previous papers about this programme (Vidal, Castel, & Franc ois, 2007;Zhang, Castel, & Franc ois, 2009;Zhu, Franc ois, Coronelli, & Cleland, 2013), thus, only a very short introduction will be presented in the sequence. The non-corroded beams were treated as control beams (non-corroded beams), which were cast at the same time and kept under the same service load but not stored in the chloride environment.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Prediction of the residual load-bearing capacity of naturally corroded beams using the variability of tension behaviour of corroded steel bars

Zhu

François

2015

Structure and Infrastructure Engineering

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This paper shows the residual behaviour of a highly corroded beam stored under sustained load in a chloride environment for 28 years. A non-corroded beam of the same age was also kept under sustained loading but in a non-aggressive environment as a control beam. Both beams were subjected to a three-point bending experiment until failure. The lower tensile reinforcement was extracted so that the tension properties of the corroded bars could be investigated. The yield strength, ultimate strength and ultimate strain of the corroded bars followed a normal distribution. Both the average value and the characteristic value of the yield strength, ultimate strength and ultimate strain were used to predict the residual mechanical performance of the beams. The changes in yield capacity and ultimate capacity of the corroded beam in comparison with the non-corroded beam are discussed in relation to the damage to the steel reinforcing bars. According to the variability of the residual behaviour of steel bars in tension experiment, it is possible to predict the variability in the load-bearing capacity of the corroded beams which fail due to the rupture of the tension bars.

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“…To obtain the accurate corrosion rate of the reinforcements embedded in the corroded RC column, the specimen was further broken down and the reinforcement cage in it was taken out after the bearing capacity test. According to the standard ASTM G1-03, the corrosion products were thereafter removed by mechanical and chemical cleaning, the mass of each corroded reinforcement was weighed, and the actual corrosion rate generally defined as the weight loss percentage of the original state was calculated per Equation (3) [45], where ∆m is the weight loss, and m i and m f are the mass of the reinforcement before and after corrosion, respectively:…”

Section: Corrosion Of Reinforcementsmentioning

confidence: 99%

Acoustic Emission Analysis of Corroded Reinforced Concrete Columns under Compressive Loading

Jin

et al. 2020

Sensors

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In this work, the failure process of non-corroded and corroded reinforced concrete (RC) columns under eccentric compressive loading is studied using the acoustic emission (AE) technique. The results show that reinforcement corrosion considerably affects the mechanical failure process of RC columns. The corrosion of reinforcement in RC columns leads to highly active AE signals at the initial stage of loading, in comparison to the non-corroded counterparts. Also, a continuous AE hit pattern with a higher number of cumulative hits is observed for corroded RC columns. The spatial distribution and evolution of AE events indicate that the reinforcement corrosion noticeably accelerates the initiation and propagation of cracking in the RC columns during compressive loading. The AE characteristics of corroded RC columns are in agreement with the macroscopic failure behaviors observed during the damage and failure process. A damage evolution model of corroded RC columns based on the AE parameters is proposed.

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Effect of corrosion of reinforcement on the mechanical behaviour of highly corroded RC beams

Cited by 118 publications

References 19 publications

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Prediction of the residual load-bearing capacity of naturally corroded beams using the variability of tension behaviour of corroded steel bars

Acoustic Emission Analysis of Corroded Reinforced Concrete Columns under Compressive Loading

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