Strengthening and repair of circular RC slabs with openings using CFRP strips under repeated loading

Al-Sulayvani, Bayar J.; Al-Talabani, Diyar N.

doi:10.1016/j.conbuildmat.2015.03.058

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…To achieve significant improvements in bending strength, the retrofitting of high-polymer composite materials has been explored [ 8 , 9 , 10 , 11 ]. Notably, the application of carbon fiber sheets as reinforcement on the underside of test specimens during flexural tests has demonstrated substantial enhancements in flexural strength [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Geopolymer and Carbon Fiber-Reinforced Polymer for Repairing Reinforced Concrete Deck Soffit

Hao

Syu

et al. 2023

Materials

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This study aimed to assess the feasibility of utilizing geopolymer for repairing reinforced concrete beams. Three types of beam specimens were fabricated: benchmark specimens without any grooves, rectangular-grooved beams, and square-grooved beams. The repair materials employed included geopolymer material, and epoxy resin mortar, while carbon fiber sheets were used as reinforcement in select cases. The repair materials were applied to the rectangular and square-grooved specimens, with the carbon fiber sheets attached to the tension side of the specimens. To evaluate the flexural strength of the concrete specimens, a third-point loading test was conducted. The test results indicated that the geopolymer exhibited higher compressive strength and shrinkage rate compared to the epoxy resin mortar. Furthermore, the specimens reinforced with carbon fiber sheets demonstrated even greater strength than the benchmark specimens. In terms of flexural strength under cyclic third-point loading tests, the carbon fiber-reinforced specimens exhibited the ability to withstand over 200 cycles of repeated loading at 0.8 times the ultimate load. In contrast, the benchmark specimens could only withstand seven cycles. These findings highlight that the use of carbon fiber sheets not only enhances compressive strength but also improves resistance to cyclic loading.

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Section: Introductionmentioning

confidence: 99%

Use of Geopolymer and Carbon Fiber-Reinforced Polymer for Repairing Reinforced Concrete Deck Soffit

Hao

Syu

et al. 2023

Materials

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“…It was observed that with the increase in the number of load cycles, the corresponding deflection at ultimate load, number, and width of the cracks were increased. An experimental study was carried out in 2015 by Al-Sulayvani [3]. He tested thirteen two way slab specimens under repeated loading.…”

Section: Introductionmentioning

confidence: 99%

Influence of Loading Pattern Regime on Behavior of Self Compacting Concrete Voided Slab Strips under Repeated Load

Al-Shaarbaf¹,

Ali²,

Ahmed³

2020

ETJ

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This study presents an experimental approach to investigate the structural behavior of normal and moderately high strength Self Compacted Concrete (SCC) voided slab strips under repeated loading system. The experiments were carried out on eight one-way simply supported slabs. Four of them have been tested under two types of repeated loading regime. The required number of cycles of the first load pattern (R1) to achieve permanent damage in the slab is more than 40 cycles, while the second type of repeated loading regime (R2) requires more than 20 cycles to achieve complete damage in the slab for the selected loading scheme. The remaining four additional slabs were tested under monotonically increasing loads. The loading techniques have been applied under the displacement control scheme. The experimental results show that for moderately thick reinforced SCC one way slab having (3 voids, dia. =75mm) under repeated load R1, the ultimate load is reduced by about 10% relative to the reference solid. In this research, the number of cycles required to achieve permanent damage is decreased by about 7% and the mid-span deflection at ultimate load is increased by about 3.4% relative to the reference solid slab. The ultimate load for slab having (3 voids, dia. =75mm) under repeated load R2 is decreased by about 6%, the deflection at ultimate load and the number of cycles are decreased by about 6.1%and 16.7% respectively concerning SCC reference solid slab.

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Punching behavior of strengthened and repaired RC slabs with CFRP

Gherdaoui

Guenfoud

Madi

2018

Construction and Building Materials

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Strengthening and repair of circular RC slabs with openings using CFRP strips under repeated loading

Cited by 10 publications

References 3 publications

Use of Geopolymer and Carbon Fiber-Reinforced Polymer for Repairing Reinforced Concrete Deck Soffit

Use of Geopolymer and Carbon Fiber-Reinforced Polymer for Repairing Reinforced Concrete Deck Soffit

Influence of Loading Pattern Regime on Behavior of Self Compacting Concrete Voided Slab Strips under Repeated Load

Punching behavior of strengthened and repaired RC slabs with CFRP

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