Behavior of corrosion damaged circular reinforced concrete columns under cyclic loading

Ma, Ying; Yi, Chunhai; Gong, Jinxin

doi:10.1016/j.conbuildmat.2011.11.002

Cited by 239 publications

(115 citation statements)

References 7 publications

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“…In experimental studies, the corrosion level is generally measured as the percentage of decreased bar weight relative to the prime bar weight [2,10]. However, this method fails to describe the true corrosion status by ignoring the position, the depth and area of corrosion pit.…”

Section: Geometry and Materials Strength Of Corroded Rebarmentioning

confidence: 99%

“…A RC circular column in the experimental study by Ma et al [2] was chosen. The circular column has dimensions as shown in Fig.…”

Section: Details Of Modelling Specimenmentioning

confidence: 99%

“…In experimental studies and engineering investigations on corroded RC, many scholars including Li and Yang [1], Ma et al [2] and Wang and Liang [3] found that the transverse rebar could undergo more severe damage than the longitudinal rebar, and even break at the junction point with the longitudinal rebar. Because of the comparative smaller depth of concrete cover for transverse rebars, the latter are more easily reached by chloride and other corrosion induction chemicals.…”

Section: Introductionmentioning

confidence: 99%

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The corrosion of stirrups and its effect on the seismic fragility of a corroded reinforced concrete column

Zhang

2017

WIT Transactions on State-of-the-Art in Science and Engineering

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As service rates increase, the corroded rebar stands out as a major problem for existing reinforced concrete (RC) columns in a corrosion-inducing environment. The corrosion of stirrups is more serious than that of longitudinal bars, due to smaller clear concrete cover and smaller diameter. It deteriorates the confinement behaviour and thus decreases the shear resistant capacity, potentially changing the failure modes from ductile flexural failure mode to brittle flexural-shear failure mode, or even shear failure mode. Therefore, the evolution of the seismic damage pattern of existing corroded RC columns and its service-year related fragility analysis are becoming heated research topics in the field of structure hazard prevention research. The objectives of this paper will be to focus on how to use FEM software to numerically simulate the seismic behaviour of corroded columns accounting for materials deterioration and bond degradation. Pushover curves shown that a transverse rebar corrosion level above 10% could reduce the seismic capacity of columns by a great extent. In addition, the stiffness, ductility and energy dissipation capacity declines. It also demonstrated the transition of failure mode from flexure failure to shear failure as the corrosion level of stirrups increased. The fragility analysis based on the FEM results indicated that the RC column with corroded stirrups is much more vulnerable.

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Section: Geometry and Materials Strength Of Corroded Rebarmentioning

confidence: 99%

“…A RC circular column in the experimental study by Ma et al [2] was chosen. The circular column has dimensions as shown in Fig.…”

Section: Details Of Modelling Specimenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The corrosion of stirrups and its effect on the seismic fragility of a corroded reinforced concrete column

Zhang

2017

WIT Transactions on State-of-the-Art in Science and Engineering

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“…Past experiences have shown that reinforcement corrosion reduces the beam and column capacity due to steel area losses, bond deterioration, reduction in the effective concrete area, etc. (Li & Li, 2014;Ma, Che, & Gong, 2012;Pantazopoulou, Bonacci, Sheikh, Thomas, & Hearn, 2001). Despite a large body of literature on the influence of reinforcing steel corrosion on the flexural capacity of RC columns, there are few works that have dealt with the reduction in shear capacity of RC columns due to the corrosion of stirrups (Xia, Jin, & Li, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of PET Wrapping on Shear Performance of Corroded Reinforced Concrete Columns

Zhang¹,

Zhao²,

Ueda³

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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In this paper, an experimental study is presented on the influence of PET warping on shear performance, such as diagonal shear cracking load, peak load, and energy dissipation of RC columns with stirrup corrosion before strengthening. The experimental program involved an electrochemical process to accelerate the migration of chlorides from an external electrolyte into the tested columns, a wetting-drying cycle process with a controlled current to speed up the corrosion of the stirrup in the tested columns, the strengthening of corroded columns with PET warping, and a pseudostatic test to determine the shear capacity of the tested beams. The shear performance of PET wrapped RC columns with different corrosion levels in stirrups, including the diagonal cracking strength, the peak strength, the ductility ratio, and the energy dissipation ability, was examined and compared.

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“…In addition, cracks and the galvanic corrosion in the junction of stirrups and longitudinal reinforcement make the stirrups more prone to corrosion. Due to stirrups bearing most of the shear in the shear component, coupled with its small diameter, make stirrups rust off, and then cause brittle fracture of components (Ma et al 2012). In a word, when RC beams have a brittle failure, whose consequences are serious, it is very urgent to study the shear behavior of corroded RC beams.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Shear Behavior of RC Beams with Corroded Stirrups

Zhang

et al. 2017

ACT

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The shear behavior of corroded reinforced concrete (RC) members is an urgent problem to be solved. The study carried out an experimental program on the shear behavior of 21 beams, which included 3 un-corroded RC beams and 18 corroded ones. Both shear span-to-depth ratio and corrosion degree influencing the shear strength as well as failure patterns were discussed in detail. This paper aims to contribute to a better understanding about the effect of corrosion on the shear behavior of corroded RC beams. The test results show that corrosion of stirrups reduces the aggregate interlock capacity of concrete, also the ductility and shear strength of the flexural members. In shear-compression zone, cracks caused by corrosion of stirrup have a predominant influence on shear strength; Failure modes of RC beams depend largely on shear span-to-depth ratio and are little affected by corrosion of stirrups. Based on the results of experiments and the limit equilibrium theory, the calculation model of shear capacity for corroded simply supported RC beams is proposed, which has a simple form and clearly physical conception.

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Behavior of corrosion damaged circular reinforced concrete columns under cyclic loading

Cited by 239 publications

References 7 publications

The corrosion of stirrups and its effect on the seismic fragility of a corroded reinforced concrete column

The corrosion of stirrups and its effect on the seismic fragility of a corroded reinforced concrete column

Effect of PET Wrapping on Shear Performance of Corroded Reinforced Concrete Columns

Experimental Study on the Shear Behavior of RC Beams with Corroded Stirrups

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