Performance of externally FRP reinforced columns for changes in angle and thickness of the wrap and concrete strength

Parvin, Azadeh; Jamwal, Aditya S.

doi:10.1016/j.compstruct.2005.02.019

Cited by 38 publications

(17 citation statements)

References 9 publications

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“…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. The gain in axial compressive strength in FRP-wrapped columns was observed to be higher for lower strength concrete and the highest in the columns wrapped with the 0° ply angle configuration [13]. Not only the combination of angle and hoop wrap plies configuration, but also their stacking sequence, provide different level of strength and ductility enhancement for the same total wrap thickness.…”

Section: Frp Confinement Of Columnsmentioning

confidence: 93%

“…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%

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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: 93%

Section: Frp Confinement Of Columnsmentioning

confidence: 99%

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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“…However, the axial stress-strain curve of such columns shows softening behavior rather than a hardening behavior after sectional yielding, as illustrated by the stress-strain relationship of CFFT section columns [21][22][23][24][25]. The stress-strain relationship of CFFT columns under axial compression presents bilinear ascending behavior, leading to a load-bearing capacity superior to most previous hybrid column sections [26,27]. In most such columns, the FRP acts primarily as a jacket, confining the inner concrete in the hoop direction to achieve a desired load-bearing capacity [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of concrete-filled square steel tube with FRP-confined concrete core subjected to axial compression

Feng

Shi

Bai

et al. 2015

Composite Structures

330

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“…In a study by Parvin and Jamwal (2006), circular concrete columns were wrapped. Various parameters such as wrap thickness, fibre orientation, and concrete strength were studied.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Behaviour of Square/Rectangular Reinforced Concrete Columns Retrofitted With FRP Jacket / Gelžbetoninių Kvadratinio/Stačiakampio Skerspjūvio Formos Elementų, Sustiprintų Polimeriniu Pluoštu Armuotu Apvalkalu, Elgsenos Tyrimas

Hajsadeghi

Alaee

Shahmohammadi

2011

Journal of Civil Engineering and Management

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The behaviour of fibre reinforced polymer (FRP)-wrapped concrete in circular columns has been extensively studied; however, much less is known about concrete in FRP-confined square/rectangular columns, in which the concrete is non-uniformly confined and the effectiveness of confinement is considerably reduced. This article presents the results of the numerical analysis of square/rectangular reinforced concrete (RC) columns confined with FRP jackets. Two prisms of size 250×250×500 mm and 150×300×500 mm were modelled and analysis was carried out using a non-linear finite element method. Two parameters of wrap thickness and fibre orientation were considered. The finite element analysis results were in good agreement with experimental data presented by other researchers. The numerical analysis results demonstrated significant enhancement in the compressive strength and ductility of the FRP-wrapped square/rectangular RC columns compared to unconfined RC columns. It was observed that the behaviour of the columns was greatly affected by the analysis parameters. Santrauka Apskritojo skerspjūvio armuotų betoninių elementų sustiprintų polimeriniu pluoštu armuotu apvalkalu, elgsena yra išsamiai išnagrinėta. Daug mažiau žinoma apie tokių stačiakampio skerspjūvio elementų elgseną. Tokiuose elementuose betono deformacijos suvaržomos nevienodai, dėl to mažėja sustiprinimo efektyvumas. Straipsnyje pateikiami kvadratinio ir stačiakampio skerspjūvio gelžbetoninių elementų skaitinio tyrimo rezultatai. Taikant baigtinių elementų metodą buvo atlikta dviejų 250×250×500 mm ir 150×300×500 mm prizmių netiesinė analizė. Buvo išnagrinėta po du apvalkalo storio ir pluošto orientacijos atvejus. Baigtinių elementų analizės rezultatai gerai sutapo su eksperimentiniais kitų tyrėjų pateiktais duomenimis. Tyrimo rezultatai parodė, kad sustiprinimas žymiai padidina elementų gniuždomajį stiprį ir stamantrumą lyginant su analogiškais nesustiprintų elementų rodikliais. Buvo pastebėta, kad sustiprėjimo poveikis priklauso nuo apvalkalo rodiklių.

show abstract

Performance of externally FRP reinforced columns for changes in angle and thickness of the wrap and concrete strength

Cited by 38 publications

References 9 publications

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

Mechanical behavior of concrete-filled square steel tube with FRP-confined concrete core subjected to axial compression

Investigation on Behaviour of Square/Rectangular Reinforced Concrete Columns Retrofitted With FRP Jacket / Gelžbetoninių Kvadratinio/Stačiakampio Skerspjūvio Formos Elementų, Sustiprintų Polimeriniu Pluoštu Armuotu Apvalkalu, Elgsenos Tyrimas

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