Structural performance of shear-critical RC deep beams with corroded longitudinal steel reinforcement

Azam, Rizwan; Soudki, Khaled

doi:10.1016/j.cemconcomp.2012.05.003

Cited by 38 publications

(30 citation statements)

References 8 publications

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“…In the recent few years, a significant number of researchers have employed analytical and nonlinear finite element analysis approaches (Coronelli and Gambarova 2004, El Maaddawy et al 2005b, Kallias 2011, for structural performance evaluation of corroded RC components. Azam (2010) and Alaskar (2013) have used modified compression field theory (MCFT) to estimate the shear strength of uncorroded and corroded RC beams. More recently, Di Carlo et al (2017a,b) have employed 3D continuum finite element modelling approaches for nonlinear structural and seismic performance assessment of corroded RC bridge piers subject to cyclic loading.…”

Section: Modelling Nonlinear Flexural Behaviourmentioning

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: Modelling Nonlinear Flexural Behaviourmentioning

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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“…Despite the high corrosion level of the steel bars, with maximum loss reaching 50% of the initial cross section, the ultimate capacity of deep beams was slightly decreased, as also recorded by Khan et al (2014) on naturally corroded beams or Azam and Soudki (2012) on beams undergoing accelerated corrosion. The change in load transfer mechanism and failure mode could explain these results.…”

Section: Resultsmentioning

confidence: 77%

Shear behaviour and load capacity of short reinforced concrete beams exposed to chloride environment

Dang

François

Coronelli

2015

European Journal of Environmental and Civil Engineering

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The effect of corrosion of reinforcement on the behaviour of deep, reinforced concrete beams was investigated. Long-term corrosion (27 years) in an accelerated climate process using a chloride environment close to natural corrosion resulted in a high level of heterogeneous loss of cross section on both longitudinal reinforcement and transversal reinforcement (stirrups). Control beams of the same age kept in a non-aggressive environment were also tested as controls. Tension reinforcement did not have special anchorage since the rebars had straight edges. For deep beams, the behaviour during bending tests involved a combination of arch action and beam action, which could be affected by corrosion in different ways, such as anchoring capacity, stirrup corrosion and resulting transversal cracks and loss of cross section in the tension reinforcement. Nevertheless, and despite the high corrosion level of the steel bars, the ultimate capacity of deep beams was only slightly decreased. The changes in load transfer mechanism and failure mode could explain these results.

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“…Shear strength is affected by corrosion particularly when stirrups reinforcing area is reduced as reported in Kahn et al [19] and El-Sayed [20] and highlighted in fib bulletin 10 (bond of reinforcement in concrete) [21]. However, in absence of shear reinforcement as for slabs, when corrosion takes place and a substantial change in failure mechanism takes place after longitudinal splitting, an increase in both structural capacity and ductility could be registered [22]. is is mainly due to an arch-tie action that could enhance the structural performance of the RC element.…”

Section: Introductionmentioning

confidence: 98%

A Model for the Analysis of Ultimate Capacity of RC and PC Corroded Beams

Recupero

Spinella

Tondolo

2018

Advances in Civil Engineering

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Corrosion of steel in reinforced and prestressed concrete beams is very common for structures and infrastructures. It can drastically reduce the resisting section of rebar, modify the mechanical response of the steel rebar, and also determine cracking of the surrounding concrete because of the volume expansion effect of rust. Moreover, it heavily influences the bond between steel rebar and concrete. Few experimental tests are available in the literature, where the structural behavior of reinforced and prestressed concrete beams, in presence of corrosion of longitudinal and transversal reinforcement, is analyzed. A reduction of the bearing performance is observed with an increasing level of rebar corrosion. Indeed, a changing collapse mechanism is evidenced through the tests and may be addressed to the not obvious consequences of corrosion. In this paper, a physical model based on a consistent equilibrium and ultimate strength theory is employed in order to explain the residual capacity of corroded beams. e model is based on limit analysis, and it is able to take into account the interaction between shear, bending moment, and axial forces.

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Structural performance of shear-critical RC deep beams with corroded longitudinal steel reinforcement

Cited by 38 publications

References 8 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

Shear behaviour and load capacity of short reinforced concrete beams exposed to chloride environment

A Model for the Analysis of Ultimate Capacity of RC and PC Corroded Beams

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