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

Abstract

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.

Compressive Performance of Corroded Reinforced Concrete Columns

“…This reduction in the load capacity can be attributed to adverse influence of the corrosion process on the steel bars section, the damage of concrete section, and the drop of the bond between the steel bars and the concrete. This trend of performance in the corroded reinforced concrete columns is to some extent similar trending that stated by other researchers [4], [6].…”

“…The corrosion of steel bars has several adverse impacts: loss the cross section and the ductility of steel reinforcement bars, cracking and spalling in the cover of concrete, weakening the bond between the concrete and reinforcement steel. The serviceability and ultimate capacity of structure member is undesirably affected [4].…”

Aerial robotic technologies for civil engineering: established and emerging practice

“…Visual inspection data can be unreliable as results are reliant on the inspector's own judgement and experience (e.g., McRobbie et al 2015;Bennetts et al 2018;Bolourian and Hammad et al 2020;Popescu et al 2019;Reagan et al 2017;Vaghefi et al 2012). Visual observation of cracks on the surface of structures is often considered a failure condition (or at least a warning of potential failure) (e.g., Kashani et al 2019), and are difficult to detect with the naked eye during inspections (e.g., McRobbie et al 2015;Reagan et al 2017). Usually, photographs are not taken of the entire structure during physical inspections, and hence monitoring changes of bridge condition is difficult (McRobbie et al 2015, Bennetts et al 2021.…”

Corrosion Effect on Bond Loss between Steel and Concrete

“…To this effect, several studies targeted on the relationship between the degree of corrosion of steel reinforcement and the bearing capacity of corresponding reinforced concrete structures [17][18][19]. Recently, Kashani et al [20] presented a state of the art review up to date concerning the current knowledge upon residual capacity of corroded RC elements.…”