Structural performance of RC beams under simultaneous loading and reinforcement corrosion

Du, Yingang; Cullen, Martin; Li, Cankang

doi:10.1016/j.conbuildmat.2012.08.010

Cited by 46 publications

(17 citation statements)

References 10 publications

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“…Up to now, many experimental investigations have been carried out to study the effects of reinforcement corrosion on the concrete members. The major available documents of reinforcement corrosion are focusing on mechanism of corrosion, assessment of strength, ductility and failure behaviour of RC beams affected by reinforcement corrosion (e.g., Almusallam et al 1996;Mangat et al 1999;Wojtas 2004;Torres-Acosta et al 2007;Capozucca et al 2003Capozucca et al , 2008Yan et al 2012;Du et al 2013;Ou et al 2013). Capozucca et al (2008) experimentally studied the behaviour of pre-stressed RC beams with compressive concrete subjected to reinforcement corrosion.…”

Section: Raw Materials and Specimensmentioning

confidence: 99%

“…The test results showed that the flexural rigidity was decreased while curvature was increased. Du et al (2013) discussed the ultimate strength, maximum deflection and failure modes of RC beams under simultaneous loading and reinforcement corrosion. It is concluded that the structural performance of RC beams were further deteriorated under simultaneous loading and reinforcement corrosion, compared with RC beams fisted corroded to an expected extent before loaded.…”

Section: Raw Materials and Specimensmentioning

confidence: 99%

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Experimental Investigation on the Dynamic Properties of RC Structures Affected by the Reinforcement Corrosion

Zou

Liu

Qiao

2014

Advances in Structural Engineering

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Reinforcement concrete (RC) structures in service are suffered from environmental attacks, especially the rebar corrosion, which may lead to the deterioration of mechanical characteristics of steel bars, surrounding concrete and bond strength, and therefore jeopardize their performance in earthquake events. In this paper, an electro-chemical accelerated corrosion process was introduced to RC frames and columns, and then the half-cell method, linear polarization method and constant potential step method were performed to monitor the corrosion status. Furthermore, for studying the dynamic properties of RC structures affected by reinforcement corrosion, the dynamic tests were carried out to study the fundamental frequency and damping ratio of control frame and frames which designed steel losses were 10% and 30%, respectively. The experimental results show that the influence of corrosion damage on fundamental frequency and damping ratio is significant. Substantial increases were observed in fundamental frequency and damping ratio after the accelerated corrosion occurred. It indicates that the decreased bond strength or ultimate bearing capacity cannot ensure that the stiffness of healthy member is always greater than that of damaged member. Moreover, the variations of frequency and damping ratio, induced by steel corrosion, are not inconsistent. This investigation provides further insight into the use of fundamental frequency and damping ratio to detect damage of RC structures.

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Section: Raw Materials and Specimensmentioning

confidence: 99%

Section: Raw Materials and Specimensmentioning

confidence: 99%

Experimental Investigation on the Dynamic Properties of RC Structures Affected by the Reinforcement Corrosion

Zou

Liu

Qiao

2014

Advances in Structural Engineering

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“…For the beam CL80-15-2, the under-reinforced beam of brittle failure replace the antic ipated ductile flexural failure. The reduction in ductility of corroded reinforcement and non-uniform corrosion along the length of a corroded bar [13]. In practice, the engineering structures with corroding reinforcements are still being used and playing important role in our society.…”

Section: Structural Performance Under Loading and Corrosionmentioning

confidence: 99%

“…Recently, the effects of load and corrosion on the structural performance have been reported [9][10][11][12][13], these investigations are mainly focused on the behavior of concrete beam at its corrosion propagation, surface cracks, instead of ductility, ultimate strength, and the relationship between loading and corrosion. In addition, the investigations for the simulation of reinforcement corrosion are mainly focus on the middle span [9][10][11][12][13], and the effect of shear reinforcement corrosion were ignored, and the level of sustained loads applied on the beams was only about 8% and 12% of beam ultimate capacity [11][12], which are smaller than that in actual structures. Malumbela at al.…”

Section: Introductionmentioning

confidence: 99%

Flexural experiment and stiffness investigation of reinforced concrete beam under chloride penetration and sustained loading

Liu

Jiang

Deng

et al. 2016

Construction and Building Materials

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This paper presents an experimental study conducted to characterize the effect of corrosion and sustained load on structural behavior of reinforced concrete (RC) beam. The effects of loading level on corrosion of reinforcing steel, the flexural deflection and residual loading capacity of the test beams were investigated. In the first scenario, two non-corroded beams were tested to determine the maximum load levels that were required by the beams to reach their deflection limits and that were also tested for the sustained levels of the applied loads. For the second experiment, the corrosion was accelerated through the application of external direct current whilst the beams were under the load equivalent to 0%, 50%, 65% and 80% of the ultimate load.The results indicate that load levels have a significant effect on the rise of steel corrosion level, the decrease of flexural stiffness and the degradation of flexural capacity. The mechanical properties like the strength and ductility are significantly impaired due to simultaneous effect of loading and corrosion in comparison to the effect of the single parameter at a time. Considering the corrosion situation of different position of steel bar, the formula of the ratios of the different position of steel bar corresponding with different sustained loading levels was given. An equation was deduced to calculate the flexural stiffness of corroded reinforced concrete and can be served as a reference for deflection calculation of corroded reinforced concrete beams.

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“…Some research projects [1, 2] focused on the diffusion of chlorides or CO 2 into the concrete cover, whereas other authors investigated the effect of corrosion on the strength and ductility of the reinforcement [3–5], on the cracking of the concrete cover [6–8] and on the bond between concrete and reinforcement [9–12]. The relationship between the amount of corrosion and the structural performance has been investigated through experimental tests on structures [13–18] that were intentionally deteriorated by applying accelerated corrosion techniques. Experimental tests on naturally corroded beams were performed in a few cases only [19, 20].…”

Section: Introductionmentioning

confidence: 99%

Modelling uncertainties for the loadbearing capacity of corroded simply supported RC beams

Allaix

Carbone

Mancini

2015

Structural Concrete

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The probabilistic assessment of structures damaged by corrosion calls for deterministic models of the degradation of the structural performance and probabilistic models accounting for the uncertainties in material properties, geometry and models used in the reliability analysis. This paper describes the development of a probabilistic model of the uncertainties that arise from the prediction of the loadbearing capacity of reinforced concrete structures damaged by corrosion of the reinforcement. The investigation focuses on the flexural failure of simply supported beams suffering from chloride-induced corrosion. The loss of steel cross-sectional area, the reduction in strength and ductility of the corroded bars, the loss of bond between reinforcement and concrete and the cracking of the concrete cover are taken into account in a non-linear finite element analysis. The comparison between experimental results and numerical predictions of the failure load allows the quantification of the model uncertainty according to the framework proposed by the Joint Committee on Structural Safety. A Bayesian updating methodology is proposed to account for prior knowledge and experimental results.

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Structural performance of RC beams under simultaneous loading and reinforcement corrosion

Cited by 46 publications

References 10 publications

Experimental Investigation on the Dynamic Properties of RC Structures Affected by the Reinforcement Corrosion

Experimental Investigation on the Dynamic Properties of RC Structures Affected by the Reinforcement Corrosion

Flexural experiment and stiffness investigation of reinforced concrete beam under chloride penetration and sustained loading

Modelling uncertainties for the loadbearing capacity of corroded simply supported RC beams

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