An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams

Khagehhosseini, A.H.; Porhosseini, R.; Morshed, Reza; Eslami, Abolfazl

doi:10.12989/sem.2013.47.2.247

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…The formulation of the concrete material models relies most of the times on a number of empirical parameters. Over the last years, researchers use these programs to predict the nonlinear response of concrete structures with adequate accuracy [25][26][27][28][29][30]. In the current study, experimental results were verified by theoretical and numerical analysis using ANSYS code [31].…”

Section: Introductionmentioning

confidence: 95%

Investigation of Structural Response of Reinforced Concrete Beams Strengthened with Anchored FRPs

Demakos¹,

Repapis²,

Drivas³

2013

TOBCTJ

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Abstract:The beneficial effect of a composite material anchorage system (CMAS) upon the ductility and load capacity of reinforced concrete (RC) beams strengthened either with glass (GFRP) or carbon (CFRP) fabrics was investigated. The anchorage system consisted of U-shaped GFRP or CFRP strip (U-strip) at end of FRP. The U-strips were bonded around the beam section and further anchored by two tufts of glass fibres, each of them embedded at the opposite beam face and specifically in the region of compression zone of the beam web. Experimental evaluations in simply supported lightly reinforced concrete (RC) beams strengthened with one GFRP or a CFRP sheet anchored at its ends by the composite anchorage have shown that their bending capacity has increased by 8% and 17%, respectively, in relation to the capacity attained in similar RC strengthened beams without anchorage. On the other hand, their ductility was improved by an amount of 94% and 37%, respectively. ANSYS finite element program was also used to numerically verify the response of strengthened RC beams obtained experimentally. The numerical results obtained are in good agreement with the experimental, thus, the calibrated model could now be used to extend the experimental results at lower cost.

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Section: Introductionmentioning

confidence: 95%

Investigation of Structural Response of Reinforced Concrete Beams Strengthened with Anchored FRPs

Demakos¹,

Repapis²,

Drivas³

2013

TOBCTJ

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“…Several studies [1][2][3][4][5][6][7][8] have studied the behaviour of RC beams in torsion, focusing on different aspects such as the effect of reinforcement detailing, concrete strength, aspect ratio, and loading conditions. Experimental [1,[4][5][6][7][8], analytical [1][2]4] and numerical models [3,5] are used for the examination of this behaviour, while other researchers use experimental results to calibrate numerical models and then use these models to further investigate the torsional resistance of beams and the parameters that affect it, such as the strength and quantity of longitudinal and transverse reinforcement [4][5][6][7], the concrete compressive strength [4] and cross-sectional properties [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of FRP strengthened reinforced concrete T-beams in torsion

Constantinos Β. Demakos,

Constantinos C. Repapis,

Dimitrios P. Drivas

et al. 2023

Global J. Eng. Technol. Adv.

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In general, reinforced concrete (RC) members are most commonly influenced by flexural moments, axial and shear forces. However, they may also be subject to torsional moments. Torsion in reinforced concrete (RC) beams is an important phenomenon that affects the structural behaviour of buildings. Both the concrete and steel reinforcement contribute to the torsional resistance of a RC member. However, the contribution of concrete is usually neglected by the modern design codes, due to cracking. Moreover, the subject of maintenance and repair or strengthening of existing RC structures is a significant problem. The last years, fibre reinforced polymer (FRP) is widely used as external reinforcement in flexural and shear strengthening. Nevertheless, its use in torsional strengthening is not so widely investigated. Ιn this paper, the torsional behaviour of RC T-beams reinforced in shear with FRPs is experimentally investigated. Five groups of T-beams subject to pure torsion, two of which are control beams and other three beams are strengthened in shear with U-jacketed FRP fabrics. Experimental results reveal that FRPs can increase the ultimate torsional capacity of the member.

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Numerical verification for concrete beams reinforced with CFRP subjected to pure torsion

Elkheshen¹,

Eltahawy²,

Shedid³

et al. 2022

Engineering Structures

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An experimental and numerical investigation on the effect of longitudinal reinforcements in torsional resistance of RC beams

Cited by 7 publications

References 17 publications

Investigation of Structural Response of Reinforced Concrete Beams Strengthened with Anchored FRPs

Investigation of Structural Response of Reinforced Concrete Beams Strengthened with Anchored FRPs

Experimental investigation of FRP strengthened reinforced concrete T-beams in torsion

Numerical verification for concrete beams reinforced with CFRP subjected to pure torsion

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