Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

Wang, Lei; Jing, Yi; Zhang, Jiwang; Chen, Wu; Fu, Feng

doi:10.3390/ma14020467

Cited by 15 publications

(6 citation statements)

References 33 publications

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“…Ahmed et al conducted a comparison study on flexural resistance of two types of FRP (carbon-fiber-reinforced polymer (CFRP) and GFRP) strengthened geopolymer beams and found that the performance of the beams with CFRP bars showed better results in terms of ultimate load capacity and mid-span deflection compared to the GFRP bars [ 30 ]. Similar conclusions were made by [ 38 ], where CFRP bars were shown to have excellent performance for coral concrete beams. Bakar et al reviewed the failure mechanisms and common analytical models for evaluating the flexural strength of concrete beams reinforced by CFRP bars [ 31 ].…”

Section: Introductionsupporting

confidence: 88%

“…Compared to steel, FRP composites are not only immune to corrosion but also offer extraordinary tensile resistance [ 18 , 19 ]. It is therefore finding use as fiber-reinforced concrete structures [ 20 , 21 , 22 , 23 ], strengthening jacket systems [ 24 , 25 , 26 , 27 ], or reinforcing bars [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ] in infrastructure. Special attention should be given to FRP bars reinforced concrete, where the majority of the tensile load is expected to be carried by FRP bars.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Zhou

Guo-juan

et al. 2022

Polymers

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In response to resource shortage and carbon dioxide emissions, an innovative type of sustainable concrete containing LC3, seawater, sea sand, and surface-treated recycled aggregates is proposed in this study to replace traditional concrete. To understand the bond properties between the sustainable concrete and CFRP bars, an investigation was conducted on the bond behavior between sand-coated CFRP bars and advanced sustainable concrete. Pull-out tests were carried out to reveal the failure mechanisms and performance of this bond behavior. The results showed that the slip increased monotonically along with the increase in confinement. The bond strength increased up to approximately 15 MPa, and the critical ratio of C/D was reached. The critical ratio approached 3.5 for the Portland cement groups, while the ratio was determined as approximately 4.5 when LC3 was introduced. When the proportion of LC3 reached 50%, there was a reduction in bond strength. A multisegmented modified bond–slip model was developed to describe the four-stage bond behavior. In terms of bond strength and slip, the proposed advanced concrete exhibited almost identical bond behavior to other types of concrete.

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Section: Introductionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Zhou

Guo-juan

et al. 2022

Polymers

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“…e flexural stiffness of components can be increased by raising the moment of inertia of cross section or by choosing the material with a higher modulus of elasticity. Stiffness is the line's slope that connects the origin of the load-lateral displacement curves and a point corresponding to a deflection of L/250 (L is the beam's span length) [33]. On the other hand, the stiffness of each phase was calculated as the ratio of the maximum load and its corresponding displacement k i [34].…”

Section: Average Flexural Stiffness (Afs)mentioning

confidence: 99%

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Rajab

Ali

Mahmoud

et al. 2022

Journal of Engineering

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The enhancement of concrete structures’ performance can easily be achieved. However, the main challenge is how to achieve this performance with respect to the economy and sustainability. The aim of this research is to examine the flexural strength, ductility, stiffness, and toughness of RC hollow one-way slabs that are voided by plastic bottles. A new technique of hollowing has been used in this work, where a steel mesh tube was prepared previously and filled manually with blank waste plastic bottles to form a light tube. This technique has some advantages including ease of installation and adequate bonding for the main steel reinforcements. Five RC one-way slabs were cast and tested in the lab to investigate some variables: the presence of hollow, the ratio of reinforcement, and slab thickness. Briefly, a new technique for voids enhances the flexural behavior with less concrete and weight. The ductility is increased by about 100% for the voided specimens for the same section’s thickness. Also, the rotation in supports had been reduced by about 30% when the thickness of voided slab was increased by about 15%.

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“…In the United States, Canada, and European countries, this creates a huge economic burden during regular maintenance, repair, and restoration [4,5] of reinforced concrete structures, which has prompted an urgent need for alternative reinforcement measures. One of the proposed solutions for these problems is the use of fiber-reinforced polymer (FRP) bars with excellent corrosion resistance to replace steel bars as the novel internal reinforcements for concrete structures [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Bond Performance of Carbon- and Glass-Fiber Reinforced Polymer (CFRP/GFRP) Bars and Steel Strands to Concrete

et al. 2021

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FRP bars and steel strands are widely used in civil engineering. In this study, three different types of high-strength reinforcement materials, carbon fiber reinforced polymer (CFRP) bar, glass fiber reinforced polymer (GFRP) bar, and steel strand, were investigated for their interfacial bond performance with concrete. A total of 90 sets of specimens were conducted to analyze the effects of various parameters such as the diameter of reinforcement, bond length, the grade of concrete and stirrup on the bond strength and residual bond strength. The results show that CFRP bars possess a higher bond strength retention rate than steel bars in the residual section. in addition, with the increase in bond length and diameter of the CFRP bar, the residual bond strength decreases, and the bond strength retention rate decreases. Furthermore, the bond strength retention rate of GFRP bars was found to be higher than that of CFRP bars. With the increase in grade of concrete, the bond strength and residual bond strength between GFRP bars and concrete increases, but the bond strength retention rate decreases. With an increase in bond length and diameter of the GFRP bar, the bond strength starts to decrease. Further, stirrup can also increase the bond strength and reduce the slip at the free end of GFRP bars. Moreover, the bond strength retention rate of the steel strand was found to be lower than CFRP and GFRP bar.

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Short-Term Flexural Stiffness Prediction of CFRP Bars Reinforced Coral Concrete Beams

Cited by 15 publications

References 33 publications

Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Experimental Investigations on Bond Behavior between FRP Bars and Advanced Sustainable Concrete

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Experimental Study on Bond Performance of Carbon- and Glass-Fiber Reinforced Polymer (CFRP/GFRP) Bars and Steel Strands to Concrete

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