Stress–Strain Behavior of Large-Scale Circular Columns Confined with FRP Composites

Matthys, Stijn; Toutanji, Houssam; Taerwe, Luc

doi:10.1061/(asce)0733-9445(2006)132:1(123)

Cited by 125 publications

(52 citation statements)

References 11 publications

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“…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%

“…The effective strain coefficient which is described as the ratio of circumferential ultimate strain to ultimate strain of FRP is in the range of 0.55 to 0.62 for fully-wrapped circular columns [4]. For rectangular or square shape columns, due to stress concentration and inhomogeneous strains at the corners, there is a substantial reduction in effective strain coefficient [6].…”

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

“…While the FRP amount and tensile strength is responsible for increase in the strength, the enhancement in ductility (ultimate axial strain) is inversely proportional to the stiffness (E-modulus) of the FRP wrap. That means the higher the increase in strength is the lower the increase in ductility is, for a particular FRP wrap [4].…”

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

See 2 more Smart Citations

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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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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Section: Frp Confinement Of Columnsmentioning

confidence: 99%

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

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FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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“…Over the past two decades, a large number of constitutive models were developed for FRP confined concrete [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. However, most of these confinement models are suitable only for concrete confined in a single material, either internal TSR or outer FRP tube.…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

et al. 2015

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This paper presents the experimental results and analytical modeling of the axial compressive behavior of concrete cylinders confined by both glass fiber-reinforced polymer (GFRP) tube and inner steel spiral reinforcement (SR). The concrete structure is termed as GFRP-SR confined concrete. The number of GFRP layers (1, 2, and 3 layers) and volumetric ratios of SR (1.5% and 3%) were the experimental variables. Test results indicate that both GFRP tube and SR confinement remarkably increase the ultimate compressive strength, energy dissipation capacity, and ductility of concrete. The volumetric ratio of SR has a more pronounced influence on the energy dissipation capacity of confined concrete with more GFRP layers. In addition, a stress-strain model is presented to predict the axial compressive behavior of GFRP-SR confined concrete. Comparisons between the analytical results obtained using the proposed model and experimental results are also presented.

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“…The FRP types commonly used for confinement applications are carbon FRP (CFRP), glass FRP (GFRP), aramid FRP (AFRP), and steel FRP (SFRP). There is an ample amount of information available in the literature concerning the behaviour of RC columns wrapped with CFRP, GFRP and AFRP sheet (a few are listed: [1][2][3][4][5][6][7][8][9][10][11][12][13][14]). However, only recently, SFRP sheets have attracted researchers' interest for confinement applications due to the significant enhancement it offers to the RC columns compared to the conventional FRP sheets [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Abd-Elrahman

El‐Hacha

2014

Polymers

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Abstract:Recently, steel fibre reinforced polymers (SFRP) sheets have been introduced for the repair and rehabilitation of concrete structures. Few researchers studied the behaviour of the concrete columns wrapped with SFRP sheets; however, several critical parameters such as the cost and ductility effectiveness of the SFRP wrapped concrete columns have been lightly addressed. Thus, the main objective of this paper is to study the cost and ductility effectiveness of SFRP wrapped concrete columns and compare the results with the conventionally used carbon FRP (CFRP) wrapped concrete columns. In addition, an analytical procedure to predict the cost effectiveness of SFRP wrapped concrete columns is also suggested, from which, a parametric study was conducted. The parametric study investigated the effect of the concrete strength, the number of SFRP layers, and the size and slenderness effects on the cost effectiveness of the concrete columns wrapped with SFRP sheets. The results from the cost and ductility effectiveness study indicated that the SFRP wrapped concrete columns showed enhanced performance over the CFRP wrapped concrete columns. The suggested analytical procedure proved to be a reliable and accurate method to predict the cost effectiveness parameter of SFRP wrapped concrete columns. The parametric study showed the significant impact of the investigated parameters on the cost effectiveness of concrete columns wrapped with SFRP sheets.

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Stress–Strain Behavior of Large-Scale Circular Columns Confined with FRP Composites

Cited by 125 publications

References 11 publications

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

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