CFRP-Confined Square RC Columns. I: Experimental Investigation

Wang, Zhenyu; Wang, Daiyu; Smith, Scott T; Lü, Dagang

doi:10.1061/(asce)cc.1943-5614.0000245

Cited by 183 publications

(114 citation statements)

References 26 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 majority of studies on the effect of FRP confinement involve axially loaded concrete cylinders or short columns that are mainly circular shape. Larger-sized square-sectioned RC columns confined with carbon fiber reinforced polymers (CFRP) wrap showed that the CFRP confinement enhanced the axial strain capacity with much higher rate than axial stress capacity [14]. Similarly, experimental study on axially loaded full-scale square and rectangular RC columns confined with glass and basalt-glass FRP laminates showed that the FRP confinement increases concrete axial strength, but it is more effective in enhancing concrete strain capacity [7].…”

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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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%

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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“…However, most of the available studies on the behavior of FRP confined concrete columns have concentrated on circular shaped columns with normal strength. The data available for columns of square or rectangular cross sections have increased over recent years but are still limited [10][11][12][13][14]. Also the validation of these results and their applicability to large-scale RC columns is of great practical interest.…”

Section: Introductionmentioning

confidence: 99%

Structural behaviour of square RC columns confined with CFRP wraps

et al. 2018

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Abstract. Loading capacity and strains of square reinforced concrete (RC) columns, strengthened with external carbon fiber reinforced polymer (CFRP) sheets, were tested and evaluated. The experimental parameters include: number of wrap layers, concrete strength and the slenderness of the columns (L/a). All test specimens were loaded to failure in axial compression. Compressive stress, axial and hoop strains have been recorded to evaluate the stress-strain relationship, ultimate strength, stiffness, and ductility of the specimens. Results clearly demonstrate that composite wrapping can enhance the structural performance of RC columns in terms of both maximum strength and ductility. The effects of test parameters are evidenced and compared.

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“…Confinement of concrete with externally bonded FRP is an important application of FRP composites. Numerous experimental studies have been conducted to examine the performance of FRP composites in retrofitting existing concrete columns [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Recently, research efforts have been directed towards the applications of FRP in new column constructions; concrete-filled FRP tubes (CFFTs) have been used as high-performance composite columns in construction of earthquake-resistant structures [19][20][21][22][23][24][25][26][27][28][29].…”

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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CFRP-Confined Square RC Columns. I: Experimental Investigation

Cited by 183 publications

References 26 publications

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

Structural behaviour of square RC columns confined with CFRP wraps

Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

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