Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

Abdel-Mohti, Ahmed; Shen, Hui

doi:10.3390/fib4010003

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…In contrast, the deflection value in the mid-span for ultimate loads decreased by (53.9 and 46.3) % for corroded damage beams (RM10) and (RM15), respectively, relative to the control beam (RM0). This was compatible with that obtained by Abdel Mohti and Shen [29], Hu et al [11], Mahmood and Lateef [14], and Zhang et al [12], [25], [30]. The prominent behavior afterward of the deflection of the beam (RM15) tends to increase slightly than the beam (RM10) until failure.…”

Section: Load-deflection Relationshipsupporting

confidence: 91%

The effect of Corroded Longitudinal Steel Bars on Flexural Behavior of Reinforced Concrete Beams

Salah¹,

Mansoor²,

Mohammed³

2022

AJES

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This study aims to examine the relationship between the corrosion rate of longitudinal tensile steel bars and the maximum flexural strength of reinforced concrete RC beams. The study's methodology is designed to show the structural behavior of corroded and non-corroded RC beams, such as ultimate load, deflection, stiffness, crack patterns, and failure mode. Three rectangular beams were cast with dimensions (150× 200 ×1200) mm, and all specimens have the same amount of longitudinal and transverse reinforcement and the same concrete strength. The major parameter is the theoretical mass loss level due to corrosion (0, 10, 15) %. Electrochemical technique was used to accelerate the corrosion in the longitudinal tensile bars. All RC beams were tested under four-point monotonic loading. The test results confirm that the cracking load in corroded beams decreased by 25% comparative to the non-corroded beam. The increase of the percent of corrosion experimental mass loss by 8.25 and 14.15 % decreased the ultimate load by about 14 % and 27%, respectively. This reduction coincided with the decrease in deflection values in mid-span for the ultimate load, which decreased by 53.9% and 46.3%. However, the flexural stiffness was reduced by 13.4 and 15.6% for corroded beams with mass loss (8.25 and 14.15), respectively, compared to the control beam (non-corroded RC beam).

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Section: Load-deflection Relationshipsupporting

confidence: 91%

The effect of Corroded Longitudinal Steel Bars on Flexural Behavior of Reinforced Concrete Beams

Salah¹,

Mansoor²,

Mohammed³

2022

AJES

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“…The level of corrosion was measured by means of measuring the amount of mass loss after the test was completed. More details about the corrosion process can be found in AbdelMohti and Shen [27]. Five levels of corrosion were targeted including 10%, 20%, 32%, 40%, and 50%.…”

Section: Casting Of Reinforced Concrete Beamsmentioning

confidence: 99%

Performance of Strengthened Non-Uniformly Corroded Reinforced SCC-RAP Members

Abdel-Mohti

Shen

2016

Fibers

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This research examines the performance of strengthened non-uniformly corroded reinforced self-consolidating concrete (SCC) members. This paper focuses on three aspects of concrete including corrosion, concrete cover loss, and repair technique. Up to a 50% corrosion level is considered in this study. Corrosion was experimentally induced and was simulated in other cases. Twenty-six reinforced concrete (RC) members with various corrosion levels or simulated corrosion levels were constructed and investigated. The beams with corrosion problems including those that had experimentally induced corrosion or simulated corrosion, with or without concrete cover, were repaired using carbon fiber reinforced polymer (CFRP) sheets and U-wraps. Two line loads were applied to all of the non-repaired and repaired beams constructed in this study until failure. It was found that it is conservative to model the actual corrosion by simulating the equivalent area of steel reinforcing for up to a 20% level of corrosion. For corrosion levels over 20%, the simulated corrosion over predicts the load capacity of the actual corrosion cases. When the concrete cover was lost and for a corrosion level larger than 10%, the repaired beam did not reach similar performance to that of a repaired beam with a concrete cover that was still intact. It appears that using two layers of CFRP sheet did not improve the load capacity further, but rather improved the ductility of the deteriorated RC member.

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“…In general, fiber-reinforced polymers (FRPs) have already been largely applied for the strengthening of deficient RC structural members in the form of FRPs as additional external flexural or shear reinforcement. Specifically, FRP sheets, strips, laminates, rods, or ropes have been extensively applied for the repairing and strengthening of RC beam-column joints [1][2][3], columns [4], frames [5,6], beams [7][8][9][10], deep beams [11], corroded beams [12], and slabs [13].…”

Section: Introductionmentioning

confidence: 99%

Reinforced Concrete Beams with Carbon-Fiber-Reinforced Polymer Bars—Experimental Study

Karayannis

Kosmidou

Chalioris

2018

Fibers

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Innovative reinforcement as fiber-reinforced polymer (FRP) bars has been proposed as alternative for the substitution of the traditional steel bars in reinforced concrete (RC) structures. Although the advantages of this polymer reinforcement have long been recognised, the predominantly elastic response, the reduced bond capacity under repeated load and the low ductility of RC members with FRP bars restricted its wide application in construction so far. In this work, the behavior of seven slender concrete beams reinforced with carbon-FRP bars under increasing static loading is experimentally investigated. Load capacities, deflections, pre-cracking and after-cracking stiffness, sudden local drops of strength, failure modes, and cracking propagation have been presented and commented. Special attention has been given in the bond conditions of the anchorage lengths of the tensile carbon-FRP bars. The application of local confinement conditions along the anchorage lengths of the carbon-FRP bars in some specimens seems to influence their cracking behavior. Nevertheless, more research is required in this direction. Comparisons of experimental results for carbon-FRP beams with beams reinforced with glass-FRP bars extracted from recent literature are also presented and commented. Comparisons of the experimental results with the predictions according to ACI 440.1R-15 and to CSA S806-12 are also included herein.

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Strengthening of Corroded Reinforced SCC-RAP Members with CFRP

Cited by 3 publications

References 16 publications

The effect of Corroded Longitudinal Steel Bars on Flexural Behavior of Reinforced Concrete Beams

The effect of Corroded Longitudinal Steel Bars on Flexural Behavior of Reinforced Concrete Beams

Performance of Strengthened Non-Uniformly Corroded Reinforced SCC-RAP Members

Reinforced Concrete Beams with Carbon-Fiber-Reinforced Polymer Bars—Experimental Study

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