Structural performance and moment redistribution of basalt FRC continuous beams reinforced with basalt FRP bars

Abushanab, Abdelrahman; Alnahhal, Wael; Farraj, Murad

doi:10.1016/j.engstruct.2021.112390

Cited by 26 publications

(15 citation statements)

References 46 publications

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“…Hybrid RC‐slabs with higher load–deflection slopes showed higher moment redistribution and vice versa. This may be attributed to the rotational capacity and ductility of the slabs 27 . For example, slabs CH‐1, CH‐7, and CH‐10 achieved a hogging moment redistribution of 6%, 8%, and 12.32% and a sagging moment redistribution of 4%, 5%, and 7.42%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This may be attributed to the rotational capacity and ductility of the slabs. 27 For example, slabs CH-1, CH-7, and CH-10 achieved a hogging moment redistribution of 6%, 8%, and 12.32% and a sagging moment redistribution of 4%, 5%, and 7.42%, respectively. The enhancement of the moment redistribution is not too much because of using the same flexural stiffness at critical sections.…”

Section: Moment Redistributionmentioning

confidence: 95%

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Numerical study on the structural performance of the continuous concrete slabs reinforced with hybrid BFRP/steel bars

Ali

Wang

Abdelaleem

et al. 2023

Structural Concrete

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This study is mainly focused on the behavior of continuous concrete slabs reinforced with hybrid bars. Moment redistribution is a specific phenomenon in statically indeterminate structures due to the existence of redundant constraints and non‐uniform flexural stiffness of the reinforced concrete (RC) members. In this paper, a numerical one‐factor‐at‐a‐time parametric study was conducted using ABAQUS software to intensely understand the impact of several parameters on the performance of the hybrid RC continuous slabs. The investigated parameters were reinforcement type and ratio, FRP‐to‐steel ratio, and arrangement of reinforcement. The analysis results showed that the difference between sagging and hogging axial stiffness is the most influential parameter on the moment redistribution of hybrid‐RC continuous slabs. In addition, increasing the amount of reinforcement ratio at the mid‐span section is more effective in enhancing the load capacity of the slabs than over middle support section. Based on the obtained numerical results, some modifications to the Tarek et al. equations were proposed to be valid for hybrid‐RC continuous slabs. The presented modifications yielded good agreement with the numerical results predicting the moment redistribution of continuous concrete slabs with hybrid reinforcement.

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Section: Resultsmentioning

confidence: 99%

Section: Moment Redistributionmentioning

confidence: 95%

Numerical study on the structural performance of the continuous concrete slabs reinforced with hybrid BFRP/steel bars

Ali

Wang

Abdelaleem

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…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%

“…Deifalla et al performed an experimental study on the torsion resistance of GFRP reinforced concrete beam and found that the use of GFRP reinforcements showed a significant improvement in terms of strength and toughness [ 32 ]. Abushanab et al investigated the flexural behavior of basalt FRP bars strengthened concrete beam and found the reinforcement ratio was a major contributor to the strength of the beam [ 28 ]. 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 ].…”

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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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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“…They found that an increase in bottom CFRP bar area resulted in an enhancement in the ultimate load of the beams while the top CFRP bars had negligible influence on the load-carrying capacity of continuous beams. Abushanab et al [25] tested a total of 10 two-span continuous RC beams with either basalt FRP (BFRP) or steel bars. Their tests showed that BFRP RC beams exhibited larger cracking width, deflection and strain than steel RC beams.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of Two-Span Continuous CFRP RC Beams

Pang

Shi

et al. 2021

Materials

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This paper investigates the feasibility of replacing steel bars with carbon-fiber-reinforced polymer (CFRP) bars in continuous reinforced concrete (RC) beams. A numerical model is introduced. Model predictions are compared with the experimental results that are available in the literature. A comprehensive numerical investigation is then performed on two-span CFRP/steel RC beams with ρb2 = 0.61–3.03% and ρb1/ρb2 = 1.5, where ρb1 and ρb2 are tensile bar ratios (ratios of tensile bar area to effective cross-sectional area of beams) over positive and negative moment regions, respectively. The study shows that replacing steel bars with CFRP bars greatly improves the crack mode at a low bar ratio. The ultimate load of CFRP RC beams is 89% higher at ρb2 = 0.61% but 7.2% lower at ρb2 = 3.03% than that of steel RC beams. In addition, CFRP RC beams exhibit around 13% greater ultimate deflection compared to steel RC beams. The difference of moment redistribution between CFRP and steel RC beams diminishes as ρb2 increases. ACI 318-19 appears to be conservative, and it leads to more accurate predictions of moment redistribution in CFRP RC beams than that in steel RC beams.

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Structural performance and moment redistribution of basalt FRC continuous beams reinforced with basalt FRP bars

Cited by 26 publications

References 46 publications

Numerical study on the structural performance of the continuous concrete slabs reinforced with hybrid BFRP/steel bars

Numerical study on the structural performance of the continuous concrete slabs reinforced with hybrid BFRP/steel bars

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

Flexural Behavior of Two-Span Continuous CFRP RC Beams

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