Behavior of concrete columns confined by carbon composite tubes

Hong, Won‐Kee; Kim, Hee-Cheul

doi:10.1139/l03-078

Cited by 58 publications

(27 citation statements)

References 8 publications

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“…In addition, a group of unbonded-wrapped specimens tested by Harries and Carey [8], Mirmiran et al [9], Mastrapa [10] and Matthys et al [11] were grouped under the category of tube-encased specimens in the database. Furthermore, except for the datasets from Saafi et al [12], Hong and Kim [13] and Ozbakkaloglu and Vincent [14], all the datasets included in the database tables were obtained from specimens that were confined by FRP shells (wraps or tubes) manufactured using a manual hand lay-up technique. The specimens of Ozbakkaloglu and Vincent [14] and Hong and Kim [13], on the other hand, were confined by FRP tubes that were manufactured using an automated filament winding technique; and the specimens of Saafi et al [12] were confined with FRP tubes supplied by a manufacturer, with no specific manufacturing method reported in the source document.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, except for the datasets from Saafi et al [12], Hong and Kim [13] and Ozbakkaloglu and Vincent [14], all the datasets included in the database tables were obtained from specimens that were confined by FRP shells (wraps or tubes) manufactured using a manual hand lay-up technique. The specimens of Ozbakkaloglu and Vincent [14] and Hong and Kim [13], on the other hand, were confined by FRP tubes that were manufactured using an automated filament winding technique; and the specimens of Saafi et al [12] were confined with FRP tubes supplied by a manufacturer, with no specific manufacturing method reported in the source document. These datasets are marked with a superscript 'fm' in Table 7 to highlight the fact that the FRP shells of these specimens were manufactured using an automated manufacturing method rather than a manual one.…”

Section: Introductionmentioning

confidence: 99%

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Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

Ozbakkaloglu

Lim

2013

Composites Part B: Engineering

336

131

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

Ozbakkaloglu

Lim

2013

Composites Part B: Engineering

336

131

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“…A number of such studies have been reported in the literature. However, the majority of these studies have been concerned with circular CFFTs (Mastrapa 1997;Saafi et al 1999;Tegola and Manni 1999;Mirmiran et al 2001;Moss 2001;Mandal et al 2005;Zhu et al 2005;Li 2006;Mohamed and Masmoudi 2010;Park et al 2011), and only a few studies have investigated the axial compressive behavior of square and rectangular CFFTs Hong and Kim 2004;Fam et al 2005;Ozbakkaloglu and Oehlers 2008a).…”

Section: Introductionmentioning

confidence: 99%

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

Ozbakkaloglu

2013

J. Compos. Constr.

144

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This paper presents results of an experimental study on the behavior of square and rectangular high-strength concrete (HSC)-filled fiber reinforced polymer (FRP) tubes (HSCFFTs) under concentric compression. The effects of the tube thickness, sectional aspect ratio and corner radius on the axial compressive behavior of concrete-filled FRP tubes (CFFTs) were investigated experimentally through the tests of 24 CFFTs that were manufactured using unidirectional carbon fiber sheets and high-strength concrete (HSC) with 78 MPa average compressive strength. As the first experimental investigation on the axial compressive behavior of square and rectangular HSCFFTs, the results of the study reported herein allows a number of significant conclusions to be drawn. First and foremost, test results indicate that sufficiently confined square and rectangular HSCFFTs can exhibit highly ductile behavior. The results also indicate that confinement effectiveness of FRP tubes increases with an increase in corner radius and decreases with an increase in sectional aspect ratio. It is also observed and discussed that HSCFFTs having tubes of low confinement effectiveness may experience a significant strength loss at the point of transition on their stress-strain curves. Furthermore, it is found that the behavior of HSCFFTs at this region differ from that of normal-strength CFFTs and it is more sensitive to the effectiveness of confining tube. Examination of the test results have also lead to a number of important observations on the influence of the key confinement parameters on the development and distribution of the hoop strains on the tubes of CFFTs, which are presented and discussed in the paper.

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“…Hence, columns in Lillistone and Jolly (1997), Mastrapa (1997), Jolly and Lillistone (1998b), Tegola and Manni (1999) and Hong and Kim (2004) have been disregarded.…”

Section: Selection Criteria Of the Cfft Databasementioning

confidence: 99%

“…It also serves as a formwork and prevents ingress of harmful chlorides and salts, and hence slows down the deterioration in the strength and ductility of concrete columns (Lillistone and Jolly 2000). The influence of different aspects of circular CFFT columns including tube thickness, diameter of the tube, tube height to diameter ratio, unconfined concrete strength, cross sectional shape, orientation of fibres, fibre type, tube manufacturing method, specimen end condition and loading (Axial, flexural and seismic) conditions on the strength and strain enhancement ratios of CFFT columns were investigated by Jolly (1997, 2000), Mastrapa (1997), Jolly and Lillistone (1998a, b), Samaan et al (1998), Matthys et al (1999), Saafi et al (1999), Tegola and Manni (1999), Rizkalla (2001a, b, 2002), Harries and Carey (2002), Hong and Kim (2004), Cole and Fam (2006), Ozbakkaloglu and Saatcioglu (2006), Li and Ou (2007), Mohamed and Masmoudi (2008a, b), Ozbakkaloglu and Oehlers (2008a), Park et al (2011), Ozbakkaloglu (2013a, Ozbakkaloglu and Vincent (2013), Idris and Ozbakkaloglu (2013), Vincent and Ozbakkaloglu (2013a, b), Hadi et al (2015Hadi et al ( , 2016.…”

Section: Introductionmentioning

confidence: 99%

Axial compressive behaviour of circular CFFT: Experimental database and design-oriented model

Khan¹,

Sheikh²,

Hadi³

2016

Steel Compos. Struct.

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Concrete Filled Fibre Reinforced Polymer Tube (CFFT) for new columns construction has attracted significant research attention in recent years. The CFFT acts as a formwork for new columns and a barrier to corrosion accelerating agents. It significantly increases both the strength capacity (Strength enhancement ratio) and the ductility (Strain enhancement ratio) of reinforced concrete columns. In this study, based on predefined selection criteria, experimental investigation results of 134 circular CFFT columns under axial compression have been compiled and analysed from 599 CFFT specimens available in the literature. It has been observed that actual confinement ratio (expressed as a function of material properties of fibres, diameter of CFFT and compressive strength of concrete) has significant influence on the strength and ductility of circular CFFT columns. Design oriented models have been proposed to compute the strength and strain enhancement ratios of circular CFFT columns. The proposed strength and strain enhancement ratio models have significantly reduced Average Absolute Error (AAE), Mean Square Error (MSE), Relative Standard Error of Estimate (RSEE) and Standard Deviation (SD) as compared to other available strength and strain enhancement ratios of circular CFFT column models. The predictions of the proposed strength and strain enhancement ratio models match well with the experimental strength and strain enhancement ratios investigation results in the compiled database. (Received April 21, 2016, Revised June 22, 2016, Accepted June 23, 2016 Abstract. Concrete Filled Fibre Reinforced Polymer Tube (CFFT) for new columns construction has attracted significant research attention in recent years. The CFFT acts as a formwork for new columns and a barrier to corrosion accelerating agents. It significantly increases both the strength capacity (Strength enhancement ratio) and the ductility (Strain enhancement ratio) of reinforced concrete columns. In this study, based on predefined selection criteria, experimental investigation results of 134 circular CFFT columns under axial compression have been compiled and analysed from 599 CFFT specimens available in the literature. It has been observed that actual confinement ratio (expressed as a function of material properties of fibres, diameter of CFFT and compressive strength of concrete) has significant influence on the strength and ductility of circular CFFT columns. Design oriented models have been proposed to compute the strength and strain enhancement ratios of circular CFFT columns. The proposed strength and strain enhancement ratio models have significantly reduced Average Absolute Error (AAE), Mean Square Error (MSE), Relative Standard Error of Estimate (RSEE) and Standard Deviation (SD) as compared to other available strength and strain enhancement ratios of circular CFFT column models. The predictions of the proposed strength and strain enhancement ratio models match well with the experimental strength and strain enhancement ratios investigation res...

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Behavior of concrete columns confined by carbon composite tubes

Cited by 58 publications

References 8 publications

Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

Axial compressive behaviour of circular CFFT: Experimental database and design-oriented model

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