The effect of transverse and flexural reinforcement on deflection and cracking of GFRP bar reinforced concrete beams

Khorasani, AmirMahyar; Esfahani, M. Reza; Sabzi, Javad

doi:10.1016/j.compositesb.2018.12.127

Cited by 41 publications

(24 citation statements)

References 20 publications

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“…8. Similar results were reported by Khorasani et al [13]. They showed that there was no significant change in the failure mode of concrete components with the normal-strength by increasing the amount of GFRP bars in the tension region.…”

Section: Effects Of Frp Bars' Diameter On the Stress Distribution And Failure Mode Of Concrete Componentssupporting

confidence: 90%

“…Of all FRP composite materials, the GFRP flexural bar [12] has drawn the attention of researchers owing to its corrosion resistance feature. Regarding this, the behaviour of concrete specimens strengthened with steel transverse reinforcement and GFRP flexural reinforcement was assessed with Khorasani et al [13,14]. They showed that the ultimate load of GFRP strengthened concrete increased by increasing the level of concrete strength and the GFRP reinforcement ratio.…”

Section: Introductionmentioning

confidence: 99%

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Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves

Kazemi

Harehdasht

et al. 2020

Structures

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The low-quality bond between fibre reinforced polymer (FRP) bars and surrounding concrete has drawn the attention of many researchers. The use of high-strength materials such as the grout in the intersection of FRP bars and surrounding concrete can effectively prevent any slippage once they are in contact and subsequently increase the bond quality. Therefore, this study was numerically focused on the flexural behaviour of concrete beams reinforced with glass fibre reinforced polymer (GFRP) and carbon fibre reinforced polymer (CFRP) bars, grouted only in the pure bending zone and along the whole beam length. The numerical outputs revealed that the grouted GFRP bars propagated the maximum principal stress in high-strength concrete beams, but not as much as that in normal-strength concrete specimens. In addition, the stress distribution in the grout, created only in the pure bending zone, was nearly constant at the ultimate moment.For the grout, developed along the whole beam length, this stress increased by approaching the mid-span of the concrete beam. Furthermore, at the ultimate moment, the tensile stress of 12-mm diameter CFRP bars was about 3.5 times more than that of the 16-mm diameter CFRP bars, leading to the generation of difference between failure modes of concrete specimens reinforced with various diameters of CFRP bars.

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Section: Effects Of Frp Bars' Diameter On the Stress Distribution And Failure Mode Of Concrete Componentssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves

Kazemi

Harehdasht

et al. 2020

Structures

View full text Add to dashboard Cite

show abstract

“…Flexural cracks of a reinforced concrete beam blended with fly ash as supplementary material had been studied by Oktaviani et al [17]. Khorasani et al [18] studied flexural cracking behavior of concrete beams reinforced with GFRP bars.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analytical Study on Crack Width of Reinforced Concrete Structures

2021

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This paper presents a comparative study for the cracking limit state according to design codes. It aims mainly to connect research findings with design code equations. Appropriate recommendations are reached and the various factors and parameters influencing crack width investigated. The most appropriate equation for crack width calculation can be found. This is done by creating an analytical and numerical program studied various factors and parameters affecting on the crack width. The Analytical study includes some variables affecting the crack width such as steel stress, concrete cover, flexural reinforcement ratio and rebar arrangement. A 3-D finite element analysis by ABAQUS were used to model and idealize the problem. The numerical results were compared with the analytical results. It was concluded that some codes did not take into account the impact of some major variables and cases on the crack width. Also, it was found that some codes are not clear in the region concerning the position of the crack width calculation and the values obtained for the crack width. For calculating crack width values, JSCE (2007) equation is the most appropriate equation as it takes into account the main parameters that affect crack width. Doi: 10.28991/cej-2021-03091720 Full Text: PDF

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“…Therefore, in the past decades several studies are performed on different aspects of FRP applications in reinforced concrete (RC) structures. For instance, various researchers investigated effect of externally bonded FRP on performance of RC beams [22,46,56]. The application of FRP sheets for strengthening wall-like structures was considered by different investigators [50].…”

Section: Introductionmentioning

confidence: 99%

Proposition of new applicable strength models for concrete columns confined with fiber reinforced polymers

2019

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In the present paper, several well-known existing design-oriented relations for circular and rectangular columns confined with fiber reinforced polymers (FRP) are reviewed and their accuracy are compared using a comprehensive database set up by the experimental results extracted from the previous research works. The main motivation for this study is the fact that despite several performed studies to develop practical models for predicting compressive strength of concrete confined with fiber reinforced polymer wraps in the past two decades, which some of them are reviewed in the present paper, it is not known clearly that which model has the most accuracy and applicability. In addition to the performed review and evaluation, new and more accurate relations are proposed using nonlinear regression techniques and their accuracy verified using same experimental data. Based on the attained results, the new proposed relationships displayed better accuracy than the existing FRP confined concrete strength models. The average values of error for the proposed relations correspond to circular and square cross sections were about 13.0 and 15.5%, respectively.

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The effect of transverse and flexural reinforcement on deflection and cracking of GFRP bar reinforced concrete beams

Cited by 41 publications

References 20 publications

Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves

Non-linear behaviour of concrete beams reinforced with GFRP and CFRP bars grouted in sleeves

Comparative Analytical Study on Crack Width of Reinforced Concrete Structures

Proposition of new applicable strength models for concrete columns confined with fiber reinforced polymers

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