Behavior of CFRP-confined concrete cylinders with a compressive steel reinforcement

Tamužs, Vitauts; Valdmanis, Vilis; Gylltoft, Kent; Tepfers, Ralejs

doi:10.1007/s11029-007-0019-x

Cited by 22 publications

(10 citation statements)

References 5 publications

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“…Tao et al (2004), Fitzwilliam & Bisby (2010) and Bisby & Ranger (2010) tested FRP-confined RC columns with a length/diameter ratio up to 20. Tamuzs et al (2007a) also tested FRP-confined RC columns with a length/diameter ratio of 4, but little slenderness effect existed in these columns as a result of their relatively small slenderness and end conditions. In addition, De Lorenzis et al (2004) and Tamuzs et al (2007b and2008) tested slender FRP-confined concrete columns without steel reinforcement subjected to concentric compression to investigate the solidity of these columns.…”

Section: Introductionmentioning

confidence: 99%

Confinement of concrete columns with unplasticized Poly-vinyl chloride tubes

Gupta

2013

Int J Adv Struct Eng

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An effective form-finding method for form-fixed spatial network structures is presented in this paper. The adaptive formfinding method is introduced along with the example of designing an ellipsoidal network dome with bar length variations being as small as possible. A typical spherical geodesic network is selected as an initial state, having bar lengths in a limit group number. Next, this network is transformed into the ellipsoidal shape as desired by applying compressions on bars according to the bar length variations caused by transformation. Afterwards, the dynamic relaxation method is employed to explicitly integrate the node positions by applying residual forces. During the form-finding process, the boundary condition of constraining nodes on the ellipsoid surface is innovatively considered as reactions on the normal direction of the surface at node positions, which are balanced with the components of the nodal forces in a reverse direction induced by compressions on bars. The node positions are also corrected according to the fixed-form condition in each explicit iteration step. In the serial results of time history, the optimal solution is found from a time history of states by properly choosing convergence criteria, and the presented form-finding procedure is proved to be applicable for form-fixed problems.

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Section: Introductionmentioning

confidence: 99%

Confinement of concrete columns with unplasticized Poly-vinyl chloride tubes

Gupta

2013

Int J Adv Struct Eng

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“…On the experimental side, Tao et al (2004), Fitzwilliam and Bisby (2010) and Bisby and Ranger 2010) tested FRP-confined RC columns with a height-to-diameter ratio up to 20.4. Tamuzs et al (2007a) also tested FRP-confined RC columns with a height-to-diameter ratio of 4, but little slenderness effect existed in these columns as a result of their relatively small slenderness and end conditions. In addition, De Lorenzis et al (2004) and Tamuzs et al (2007bTamuzs et al ( , 2008a tested slender FRP-confined concrete columns without steel reinforcement subjected to concentric compression to investigate the stability of these columns.…”

Section: Introductionmentioning

confidence: 99%

Behavior and Design of Slender FRP-Confined Circular RC Columns

Tao

Teng

2013

J. Compos. Constr.

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Strengthening of reinforced concrete (RC) columns through lateral confinement using fiber-reinforced polymer (FRP) jackets is now a widely accepted technique. While extensive research has been conducted on the behavior of such strengthened columns, only a very limited amount of work has examined the slenderness effect in these columns. To correct this deficiency, the present paper presents a systematic study on the subject and proposes the first ever design method for slender FRP-confined circular RC columns. A simple theoretical column model for such columns is first described in the paper. Numerical results obtained from this theoretical model are then presented to examine the behavior of these columns to identify the key parameters of influence. A design method based on numerical results from the column model and following the nominal curvature approach is next formulated. The accuracy and safety of the proposed design method is demonstrated through comparison with existing experimental results.

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“…The final failure of FRP-confined concrete corresponding to the rupture of FRP is very sudden and explosive because of the linear elastic tensile stress-strain behavior of FRP, thus, relatively high compression strength as well as high ductility are expected for concrete under combined FRP-SR confinement, i.e., in FRP-SR confined concrete. Few tests have been performed to investigate the behavior of concrete confined with both transverse steel reinforcement (TSR) and FRP [32][33][34][35][36][37][38][39][40][41][42]. Moreover, most of these tests were conducted to examine the performance of FRP jackets in retrofitting existing reinforced concrete (RC) columns that contained small amounts of TSR, which did not influence the behavior of FRP confined concrete.…”

Section: Introductionmentioning

confidence: 99%

“…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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Behavior of CFRP-confined concrete cylinders with a compressive steel reinforcement

Cited by 22 publications

References 5 publications

Confinement of concrete columns with unplasticized Poly-vinyl chloride tubes

Confinement of concrete columns with unplasticized Poly-vinyl chloride tubes

Behavior and Design of Slender FRP-Confined Circular RC Columns

Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

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