A practical approach for modeling FRP wrapped concrete columns

Koksal, Hasan; Doran, Bilge; Turgay, T.

doi:10.1016/j.conbuildmat.2008.07.008

Cited by 31 publications

(16 citation statements)

References 15 publications

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“…In many occasions, the laboratory results cannot be explained because some physical mechanisms and stress distribution are hard to visualize during the experiment. So far, there have been attempts of modeling the FRP-confined concrete columns using 3D nonlinear finite element analysis Shahawy et al, 2000;Teng et al, 2007;Koksal et al, 2009;Yu et al, 2010) The results from the proposed models agreed well with the experiments and could be used for strength prediction.…”

Section: Introductionsupporting

confidence: 59%

Finite Element Modeling of Concrete Specimens Confined with Metal Sheet Strips

Boonpichetvong¹,

Pannachet²,

Pinitkarnwatkul³

2016

IJTech

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This paper introduced a nonlinear finite element model using Msc.MARC to study behavior of concrete columns partially confined with metal sheet strips under uniaxial compression. The concrete and the metal sheet parts were modeled using the linear Mohr-Coulomb yield criterion and the Von-Mises yield criterion, respectively. Behaviors of the interface (bonding) material, both in the normal direction and the parallel direction to the interface, were modeled as a bilinear function based on the cohesive energy and the crack widths. The columns in this study had circular cross sections with the diameter of 15 cm and the height of 75 cm, wrapped around by 5 cm metal sheet strips. The results from 3D finite element modeling were analyzed for internally induced stresses and strains. The predicted column behavior was compatible with observed experimental data. The detailed mechanisms that were difficult to visualize during the laboratory experiments could be obtained from the analysis. It was revealed that the area of confinement and the number of applied metal sheet layers were important factors to the strength increase. The discrete confinement system was shown to be a promising alternative to the onepiece full-wrap system.

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Section: Introductionsupporting

confidence: 59%

Finite Element Modeling of Concrete Specimens Confined with Metal Sheet Strips

Boonpichetvong¹,

Pannachet²,

Pinitkarnwatkul³

2016

IJTech

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“…Employing a realistic and practical failure model of concrete which needs only cylindrical compressive strength, the cohesion and the internal friction parameters of Drucker-Prager criterion have been adjusted through a parametric study. Therefore, the Drucker-Prager cone approximates the whole compression meridian of the concrete up to the failure point of hydrostatic pressure predicted by the model [27,28]. The comparison between the predictions of this study and the experimental results of 30 single RC column specimens tested by seven different researchers [14][15][16][17][18][19]21] are to be made for the validation of this approach.…”

Section: Introductionmentioning

confidence: 98%

“…In the light of the previous works, Drucker-Prager yield criterion is used in this study, as the smooth surface representation of the Drucker-Prager yield criterion in principal stress space results in easy implementation of the criterion in computer programs [26]. Following the general theoretical formulation discussed in the companion paper [27], 3D NLFEA of conventional RC columns loaded in the axial direction is investigated here. The emphasis is kept on the evaluation of the material parameters of Drucker-Prager criterion in order to predict the axial stress-strain behavior.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of conventional RC columns under concentric loading

Doran

2009

Materials & Design

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“…Stress acting on the core concrete (cover concrete is neglected) calculated using Koksal's model. Koksal's model has also been utilized through the 3D finite element analysis of RC and FRP-confined concrete columns [11,13] successively. Figure 3(a) demonstrates the typical axial stress-strain curves recommended by Saenz for a concrete member [12].…”

Section: Simulation Of Flexural Behavior and Moment Curvature Relationsmentioning

confidence: 99%

Modeling aspects concerning the axial behavior of RC columns

Koksal¹,

Turgay²,

Karakoç³

et al. 2011

Materials Characterisation V

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This paper is concerned with the axial behavior of the RC columns. Stress-strain relationships of experimentally tested RC columns under concentric loading are compared with the predictions of the Koksal model. Moment-curvature analyses of RC sections are also performed employing the same model in a self-developed moment-curvature program for confined concrete. Results are compared with the output of EXTRACT which uses the Mander concrete model.

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A practical approach for modeling FRP wrapped concrete columns

Cited by 31 publications

References 15 publications

Finite Element Modeling of Concrete Specimens Confined with Metal Sheet Strips

Finite Element Modeling of Concrete Specimens Confined with Metal Sheet Strips

Numerical simulation of conventional RC columns under concentric loading

Modeling aspects concerning the axial behavior of RC columns

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