An Experimental Study on Shear Resisting Mechanism of RC Beams with Corroded Reinforcement

Matsuo, Tetsuji; Sakai, Michiya; Matsumura, Takuro; Kanazu, Tsutomu

doi:10.3151/crt1990.15.2_69

Cited by 18 publications

(7 citation statements)

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“…Finally, verification of the analytical approach was attempted by using the experimental data of Matsuo et al (2004) on corroded RC beam experiments. The three RC beams with sectional dimension of 20 cm by 40 cm with two 22 mm reinforcing bars were used.…”

Section: Analysis Of Rc Section With Multiple Reinforcementsmentioning

confidence: 99%

Simulation of Coupled Corrosive Product Formation, Migration into Crack and Propagation in Reinforced Concrete Sections

Toongoenthong

Maekawa

2005

ACT

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This paper aims to numerically simulate corrosion induced cracking, its propagation over sections of reinforced concrete members and the penetration of corrosive gel product into crack gaps. A coupled steel core and surrounding corrosion product are mechanically represented by a fictitious growing composite, with which the corrosive cracking initiation and subsequent propagation are simulated by 2D nonlinear crack analysis. The injection of corrosive gels into evolving cracks is substantiated in cases where corrosive cracks stably propagate such as large covers and/or comparatively small diameters of steel, and the coupled system of gel formation, migration and crack propagation is newly presented. The simulation scheme was verified through RC sections subjected to accelerated corrosion by electric current with regard to crack patterns and critical corrosion rates when cracks reach the outer surface of members.

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Section: Analysis Of Rc Section With Multiple Reinforcementsmentioning

confidence: 99%

Simulation of Coupled Corrosive Product Formation, Migration into Crack and Propagation in Reinforced Concrete Sections

Toongoenthong

Maekawa

2005

ACT

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“…The relevant experimental data of published research (Sato et al 2003;Matsuo et al 2004;Hashimoto et al 2003, Inoue et al 2004, Xue and Seki 2005 are introduced to verify the proposed equation. The scope of all the experimental data is specified as follows: Shear-span-to-effective-depth-ratio a/d: 2.5~4.0 Percent average mass loss of longitudinal bars C m : 0~18% The validation results are shown in Fig.…”

Section: Validity Of the Proposed Modified Equationmentioning

confidence: 99%

“…Because cross-section loss can generally be considered just an influence on flexural behavior, published studies have mainly focused on the latter two effects. It is agreed that the latter two effects may result in a decrease in stiffness of RC beams due to the deterioration in tension-stiffness effects and the deficit in integrity of concrete (Sahamitmongkol et al 2008;Sato et al 2003;Matsuo et al 2004;Hashimoto et al 2003). Furthermore, several studies have suggested that the deterioration in bond strength might result in the transition of load-carrying mechanism, and thus cause a change in load capacity (Sato et al 2003;Matsuo et al 2004;Hashimoto et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Influence of Longitudinal Bar Corrosion on Shear Behavior of RC Beams

Xue

Seki

2010

ACT

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There have been few reports on the shear behavior of reinforced concrete (RC) beams with corroded longitudinal bars, and the influence of longitudinal bar corrosion has yet to be quantified. Given this background, experimental investigations were conducted to investigate the shear behavior of RC beams with corroded longitudinal bars, in which parameters such as corrosion level and shear-span-to-effective-depth-ratio were taken into consideration. Analytical investigations were also performed to evaluate the load-carrying mechanism of these specimens. The investigational results indicate that the shear behavior of RC beams is influenced not only by the corrosion level of the longitudinal bars but also by the shear-span-to-effective-depth-ratio (a/d). Based on these experimental results, a modified equation capable of calculating the shear capacity of RC beams with corroded longitudinal bars was proposed and its validity was proved.

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“…Uomoto 1984) but few past studies on wall members which are frequently used in nuclear facilities. An examination of RC box culverts consisting of four faceplates (wall members) was reported by Matsuo et al (2008). However, it examined the problem with the out-of-plane bending shear on the walls and, as a result of the examination using linear-element beam members, reported that the decrease in shear strength as a structure is low even under the condition where corrosion weight loss exceeded 10%.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Study of Structural Performance of RC Shear Walls with Corroded Reinforcement

Oyamoto

Nimura

Okayasu

et al. 2017

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In this study, we made examinations by means of experimental and analytical methods for the purpose of grasping the shear characteristics of RC walls with corroded reinforcement and verified the validity of analytical models and constitutive laws by making comparisons between the analysis results and the test results. First of all, we conducted two kinds of element tests on the bond strength of reinforcement greatly affected by corroded reinforcement and tension stiffening of concrete around the reinforcement. Regardless of the diameter of the reinforcement, we found that the bond strength could be assessed using past equations and, for tension stiffening, proposed an equation in consideration of the effect of corrosion weight loss by obtaining data of constitutive laws for FEM analyses. Then, we conducted in-plane shearing tests on the RC walls with corroded reinforcement and found that the effect of the corrosion weight loss of reinforcement on the shear strength of the walls was low. Finally, we found that the analyses almost follow the test results through FEM analyses of the RC shear walls with corroded reinforcement using the constitutive laws obtained through element tests and past constitutive laws.

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An Experimental Study on Shear Resisting Mechanism of RC Beams with Corroded Reinforcement

Cited by 18 publications

References 0 publications

Simulation of Coupled Corrosive Product Formation, Migration into Crack and Propagation in Reinforced Concrete Sections

Simulation of Coupled Corrosive Product Formation, Migration into Crack and Propagation in Reinforced Concrete Sections

Influence of Longitudinal Bar Corrosion on Shear Behavior of RC Beams

Experimental and Analytical Study of Structural Performance of RC Shear Walls with Corroded Reinforcement

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