Effects of wrap thickness and ply configuration on composite-confined concrete cylinders

Parvin, Azadeh; Jamwal, Aditya S.

doi:10.1016/j.compstruct.2004.02.002

Cited by 43 publications

(23 citation statements)

References 8 publications

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“…These above studies have shown that FRP-confined concrete behaves differently from steel-confined concrete [6], so design recommendations developed for steel-confined concrete columns (or cylinders) cannot be applied to FRP-confined columns despite the apparent similarity between these two types of columns or cylinders. Prawin and Jamwal [10] investigated the behavior of small-scale FRP wrapped concrete cylinders under uniaxial compressive loading using nonlinear finite element analysis. They considered two parameters for the numerical study: the FRP wrap thickness, and the ply configuration.…”

Section: Introductionmentioning

confidence: 99%

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Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

Almusallam

2007

Composites Part B: Engineering

122

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Section: Introductionmentioning

confidence: 99%

“…These studies are mainly conducted on the compressive strength and stress-strain behavior of FRP-confined concrete, e.g. [1][2][3][4][5][6][7][8][9][10][11][12]. Demers and Neale [3] investigated the effectiveness of FRP wrapping for strengthening of plain concrete cylinders.…”

Section: Introductionmentioning

confidence: 99%

Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

Almusallam

2007

Composites Part B: Engineering

122

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“…The results showed substantial increase in the axial compressive strength and ductility of the FRP-confined concrete cylinders as compared to the unconfined ones. The cylinders with "hoop-angle-hoop" ply configuration in general exhibited higher axial stress and strain capacities as compared to the cylinders with the "angle-hoop-angle" ply configuration [12]. Likewise, the performance of axially loaded FRP-confined concrete columns with three different wrap thicknesses, wrap ply angle configurations of 0°, ±15°, and 0°/±15°/0° with respect to the circumferential direction, and concrete strength values of 20.7 to 41.4 MPa was investigated.…”

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

“…Confinement effectiveness improves with the increase in the corner radius [3]. Recent studies show that application of FRP materials in the hoop or lateral direction can effectively increase the load carrying capacity and concrete strain capacity of columns under axial loading [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The effect of "hoop-angle-hoop" and "angle-hoop-angle" ply configurations (shown in Figure 2) for FRP-wrapped concrete cylinders under uniaxial compressive loading have also been considered.…”

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

Self Cite

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This paper provides a review of some of the progress in the area of fiber reinforced polymers (FRP)-strengthening of columns for several loading scenarios including impact load. The addition of FRP materials to upgrade deficiencies or to strengthen structural components can save lives by preventing collapse, reduce the damage to infrastructure, and the need for their costly replacement. The retrofit with FRP materials with desirable properties provides an excellent replacement for traditional materials, such as steel jacket, to strengthen the reinforced concrete structural members. Existing studies have shown that the use of FRP materials restore or improve the column original design strength for possible axial, shear, or flexure and in some cases allow the structure to carry more load than it was designed for. The paper further concludes that there is a need for additional research for the columns under impact loading senarios. The compiled information prepares the ground work for further evaluation of FRP-strengthening of columns that are deficient in design or are in serious need for repair due to additional load or deterioration.

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“…Parameters such as wrap thickness and ply configuration, as examined in the study, show that hoop-angle-hoop wrap configuration can be recommended [14]. Guoqiang L. et al [15] have studied the effect of thickness, stiffness, and fibre orientation of FRP layers, as well as the interfacial bonding between the FRP wraps and concrete.…”

mentioning

confidence: 99%

Investigation of GFRP strengthened RC non-slender columns under eccentric loading

Vesmawala¹,

Kodag²

2017

JCE

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An experimental analysis of reinforced-concrete columns was conducted in the paper to evaluate the effectiveness of circular, rectangular and square cross sections strengthened with the glass fibre reinforced polymer (GFRP) when subjected to eccentric loading. Parameters analysed in the paper are the type of cross section and eccentricity values. It was established that, due to uniform loading, the strength increase of circular sections is greater compared to square and rectangular sections. In addition, the strength and ductility of columns increase with the fibre reinforced polymer wrapping. Analiza ekscentrično opterećenih kratkih ab stupova ojačanih polimerom armiranim staklenim vlaknima U radu je provedena eksperimentalna analiza armiranobetonskih stupova kako bi se odredila učinkovitost kružnih, pravokutnih i kvadratnih poprečnih presjeka ojačanih polimerom armiranim staklenim vlaknima (GFRP), pod utjecajem ekscentričnog opterećenja. Parametri koji se analiziraju su vrsta poprečnog presjeka i vrijednosti ekscentričnosti. Dobiveno je da se kod kružnih presjeka zbog jednolikog opterećenja postiže veće povećanje čvrstoće u usporedbi s kvadratnim i pravokutnim presjecima. Također se čvrstoća i duktilnost stupova povećavaju ojačanjem presjeka polimerom armiran vlaknima. (1) and (2) are used to calculate the axial compressive strength of a non-slender, normal weight concrete member confined with an FRP jacket. For nonprestressed members with existing steel spiral reinforcement:For non-prestressed members with existing steel-tie reinforcementAccording to available literature, many axial compressive strength tests have been conducted on circular specimens, while just a small number of tests were conducted on noncircular reinforced concrete specimens confined with FRP. The existing strength model for FRP-confined concrete assumes the following form [9]:where f' cc and f' co are compressive strengths of the confined and unconfined concrete, respectively, while k 1 is the confinement effectiveness coefficient. The confinement effectiveness coefficient k 1 is calculated according to Eq. (4) [18]..

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Effects of wrap thickness and ply configuration on composite-confined concrete cylinders

Cited by 43 publications

References 8 publications

Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

Investigation of GFRP strengthened RC non-slender columns under eccentric loading

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