Effect of Severe Environmental Exposures on CFRP Wrapped Concrete Columns

El‐Hacha, Raafat; Green, Mark F.; Wight, Gordon

doi:10.1061/(asce)cc.1943-5614.0000074

Cited by 42 publications

(10 citation statements)

References 2 publications

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“…Moreover, the results show that the stiffness of concrete cylinders wrapped with CFRP and GFRP reinforcements is not affected by freeze-thaw environmental conditions. -Hacha et al (2010) studied the influence of extreme temperature variations on the behaviour of axially loaded plain concrete cylinders confined with FRP reinforcement. The authors tested 36 plain concrete cylinders measuring 150mm in diameter and 300mm in height.…”

Section: Axially Loaded Frp-confined Circular Concrete Columnsmentioning

confidence: 99%

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Gora

Jaganathan

Amwar

et al. 2019

WJE

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Purpose Advanced fibre-reinforced polymer (FRP) composites have been increasingly used over the past two decades for strengthening, upgrading and restoring degraded civil engineering infrastructure. Substantial experimental investigations have been conducted in recent years to understand the compressive behaviour of FRP-confined concrete columns. A considerable number of confinement models to predict the compressive behaviour of FRP-strengthened concrete columns have been developed from the results of these experimental investigations. The purpose of this paper is to present a comprehensive review of experimental investigations and theoretical models of circular and non-circular concrete columns confined with FRP reinforcement. Design/methodology/approach The paper reviews previous experimental test results on circular and non-circular concrete columns confined with FRP reinforcement under concentric and eccentric loading conditions and highlights the behaviour and mechanics of FRP confinement in these columns. The paper also reviews existing confinement models for concrete columns confined with FRP composites in both circular and non-circular sections. Findings This paper demonstrates that the performance and effectiveness of FRP confinement in concrete columns have been extensively investigated and proven effective in enhancing the structural performance and ductility of strengthened columns. The strength and ductility enhancement depend on the number of FRP layers, concrete compressive strength, corner radius for non-circular columns and intensity of load eccentricity for eccentrically loaded columns. The impact of existing theoretical models and directions for future research are also presented. Originality/value Potential researchers will gain insight into existing experimental and theoretical studies and future research directions.

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Section: Axially Loaded Frp-confined Circular Concrete Columnsmentioning

confidence: 99%

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Gora

Jaganathan

Amwar

et al. 2019

WJE

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“…Carbon fiber-reinforced polymers (CFRP) are lightweight, high-strength, and excellent corrosion resistance materials that have been used as an alternative material to strengthen structures and serve as barrier elements to carbon dioxide, chloride, and moisture ingress that promotes corrosion reactions in harsh marine environments [3,4]. Several researchers have investigated the behavior of concrete members encased with CFRP sheets that were subjected to harsh environmental conditions such as temperature variations [5,6], wet-dry cycles [7][8][9], freezing and thawing cycles [10][11][12][13], temperature extremes [14][15][16], and high chloride concentrations [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Activity on CFRP-Strengthened RC Piles of High-Pile Wharf in a Simulated Marine Environment

Zhuang

Zhou

et al. 2017

Advances in Materials Science and Engineering

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We report test results from an experimental study to investigate the effectiveness of carbon fiber-reinforced polymer (CFRP) against reinforcing steel bar corrosion. Twelve reinforced-concrete pile specimens of 180 mm square by 1,600 mm long were cast. Three pile specimens were corroded to 5% steel mass loss and then strengthened with CFRP sheets; four specimens were strengthened by using CFRP sheets, whereas the remaining five specimens were not strengthened. The specimens were placed in a simulated marine environment, and corrosion was induced by an impressed current technique. At different theoretical corrosion degrees, nondestructive tests were performed to investigate the corrosion activity of the pile specimens, and destructive tests were performed to determine reinforcing steel bar mass loss. Based on the findings, the effectiveness of the CFRP-strengthened RC piles under aggressive marine environmental conditions was established.

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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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Effect of Severe Environmental Exposures on CFRP Wrapped Concrete Columns

Cited by 42 publications

References 2 publications

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Corrosion Activity on CFRP-Strengthened RC Piles of High-Pile Wharf in a Simulated Marine Environment

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

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