Numerical Investigation of Rc Beams Strengthened With Prestressed CFRP

Daugevičius, Mykolas

doi:10.3846/2029882x.2017.1381044

Cited by 1 publication

(3 citation statements)

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“…(4) Prestressed BFRP has better ductility in comparison to prestressed CFRP, yet a higher load-carrying capacity can be achieved using prestressed CFRP. (5) The cohesive bond represents the experimental model more accurately than the fixed bond in terms of considering the deboning mode of failure; furthermore, the fixed bond overestimates the ultimate load-carrying capacity of the model.…”

Section: Discussionmentioning

confidence: 99%

“…A numerical expression developed by Hognestad that treats the ascending part as a parabola and the descending part as a straight line [9] is used to drive the material property of concrete. The concrete property in compression is derived by using Equation (5). Advances in Civil Engineering…”

Section: Validation Of the Nlfeamentioning

confidence: 99%

“…Meanwhile, a higher prestressing level leads to a higher material utilization of BFRP [1]. Experimental studies for BFRP and numerical studies for carbon fiber show the bond between FRP and concrete surface, prestressing level, and thickness of FRP have a great influence on the flexural response of the beam [3,5]. Increasing the level of prestress in the CFRP from 50% to 75% reduced the strength of the beam because the highly prestressed laminates had little strain capacity remaining and the CFRP presented premature failure [6].…”

Section: Introductionmentioning

confidence: 99%

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Flexural Response of Prestressed FRP Strengthened Reinforced Concrete Beam under Static Load

Worabo Woju,

Ambachew Asres

2023

Advances in Civil Engineering

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The motive of building sustainable structures and strengthening the structural members is important to overcome the problems associated with poor initial design and/or construction, accidental events, and degradation related to the environment. This paper aims to assess the flexural behavior of a prestressed basaltic fiber-reinforced polymer- (FRP-) strengthened reinforced concrete (RC) beam under static load through the finite-element method using ABAQUS CAE that is validated with experimental results from relevant literature. To achieve the desired objective, 18 models were prepared based on prestressing level, thickness of basalt FRP (BFRP), width of BFRP, length of BFRP, bond between concrete and BFRP, and type of FRP as study parameters. The results indicate that the use of prestressed BFRP is efficient in strengthening the flexural strength of the RC beam. Compared to nonstrengthened specimens, the flexural capacity of the specimens strengthened with BFRP at prestressing levels of 0%, 15%, 35%, and 45% show enhancement of 6.09%, 9.17%, 13.89%, and 17.57%, respectively. While increasing the width, length, and thickness of the prestressed BFRP section, increased yielding and ultimate load capacity of the specimen have been obtained; however, the ductility has been reduced up to 13.87% with increasing the BFRP thickness. The result also shows that the specimen strengthened with prestressed BFRP has better ductility than the prestressed carbon FRP (CFRP)-strengthened specimen; however, the model strengthened with prestressed CFRP has shown higher load-carrying capacity. It is also noticed that a cohesive bond better suited the experimental specimen than the fixed interference of the concrete surface, and relative to the cohesive bond, the fixed interference has shown a 17.4% higher ultimate load carrying capacity.

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Section: Discussionmentioning

confidence: 99%

Section: Validation Of the Nlfeamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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