CRFP contribution to shear capacity of strengthened RC beams

Li, Alex; Diagana, Cheikhna; Delmas, Yves

doi:10.1016/s0141-0296(01)00035-9

Cited by 63 publications

(24 citation statements)

References 6 publications

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“…It was assumed that, at such strain levels, the load recorded was close to the ultimate capacity (P u ) of the tested shear span as observed in similar beams tested by Guadagnini et al [5,6]. On the other hand, the diagonal cracking load (P cr ) was experimentally determined as the load at the onset of diagonal cracking.…”

Section: Shear Capacity and Observed Failurementioning

confidence: 76%

“…Moreover, experimental results on FRP RC beams [4,5] also indicate that the development of diagonal cracking can result in additional deformations (up to 30% of the total deflection as shown later) that need to be taken into account. Despite of this, relatively few studies have examined in detail the shear behaviour of FRP RC beams (e.g.…”

Section: Introductionmentioning

confidence: 93%

“…Despite of this, relatively few studies have examined in detail the shear behaviour of FRP RC beams (e.g. [1,[5][6][7]). …”

Section: Introductionmentioning

confidence: 99%

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A practical method for determining shear crack induced deformation in FRP RC beams

Imjai

Guadagnini

Garcia

et al. 2016

Engineering Structures

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This article proposes a practical semi-empirical method for determining shear crack-induced deformations in Glass Fibre Reinforced Polymer (GFRP) Reinforced Concrete (RC) beams. Current design guidelines neglect shear and shear crack-induced deformations in the calculation of deflections of GFRP RC beams. However, shear-induced deformations can be up to 30% of the total beam deflection due to the lower stiffness of GFRP bars compared to steel. To calculate the component of deflection due to shear action and crack opening, the proposed model uses a 'single fictitious inclined crack' with a width equal to the sum of the individual effective shear crack widths. Twelve shear tests were conducted on six RC beams reinforced internally with GFRP bars considering different reinforcement types and test parameters. The additional deformation due to shear cracks calculated by the proposed model is then used to predict the overall deformations of such beams up to failure. It is shown that, in comparison to current design guidelines, the proposed model predicts more accurately the total deflection of FRP RC beams at both service and ultimate loads. This article contributes towards the development of more accurate models to assess the overall shear deflection behaviour of FRP RC beams so as to balance the performance, serviceability and economic viability of structures.

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Section: Shear Capacity and Observed Failurementioning

confidence: 76%

Section: Introductionmentioning

confidence: 93%

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A practical method for determining shear crack induced deformation in FRP RC beams

Imjai

Guadagnini

Garcia

et al. 2016

Engineering Structures

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show abstract

“…For this purpose, they applied GFRP plates on all beam surfaces with and without anchorage (Raghu et al 2000). Li et al (2001) tested the beams with insufficient shear reinforcement in the study they performed. The effect of the amount of GFRP used to strengthened beams on beam shear strength was researched (Li et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Li et al (2001) tested the beams with insufficient shear reinforcement in the study they performed. The effect of the amount of GFRP used to strengthened beams on beam shear strength was researched (Li et al 2001). Ali et al (2001) studied on separation mechanisms in the reinforcement of the beams in terms of bending and shear in the study they performed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Anchorage Number on Behavior of Reinforced Concrete Beams Strengthened with Glass Fiber Plates

Kaya

Kankal

2015

International Journal of Concrete Structures and Materials

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Reinforced concrete beams with insufficient shear reinforcement were strengthened using glass fiber reinforced polymer (GFRP) plates. In the study, the effect of the number of bolts on the load capacity, energy dissipation, and stiffness of reinforced concrete beams were investigated by using anchor bolt of different numbers. Three strengthened with GFRP specimens, one flexural reference specimen designed in accordance to Regulation on Buildings Constructed in Disaster Areas rules, and one shear reinforcement insufficient reference specimen was tested. Anchorage was made on the surfaces of the beams in strengthened specimens using 2, 3 and 4 bolts respectively. All beams were tested under monotonic loads. Results obtained from the tests of strengthened concrete beams were compared with the result of good flexural reference specimen. The beam in which 4 bolts were used in adhering GFRP plates on beam surfaces carried approximately equal loads with the beam named as a flexural reference. The amount of energy dissipated by strengthened DE5 specimen was 96 % of the amount of energy dissipated by DE1 reference specimen. Strengthened DE5 specimen initial stiffness equal to DE1 reference specimen initial stiffness, but strengthened DE5 specimen yield stiffness about 4 % lower than DE1 reference specimen yield stiffness. Also, DE5 specimen exhibited ductile behavior and was fractured due to bending fracture. Upon the increase of the number of anchorages used in a strengthening collapsing manner of test specimens changed and load capacity and ductility thereof increased.

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Bau des Betongartens BUGA 2015 abgeschlossen

2015

Bautechnik

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CRFP contribution to shear capacity of strengthened RC beams

Cited by 63 publications

References 6 publications

A practical method for determining shear crack induced deformation in FRP RC beams

A practical method for determining shear crack induced deformation in FRP RC beams

Effect of Anchorage Number on Behavior of Reinforced Concrete Beams Strengthened with Glass Fiber Plates

Bau des Betongartens BUGA 2015 abgeschlossen

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