Axial Behavior of Rc Columns Retrofitted With FRP Composites

İlki, Alper; Peker, Önder; Karamuk, Emre; Demir, Cem; Kumbasar, Nahit

doi:10.1007/1-4020-4571-9_20

Cited by 17 publications

(5 citation statements)

References 18 publications

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“…An analysis of the test results indicated that GFRP confinement resulted in significant increases in strength and ductility, and that the failure of GFRP confined wall-like columns was controlled by the shape of the cross-section and occurred at a transverse strain of the jacket that was much lower than the ultimate strain of the fibers. Ilki et al [16] studied the uniaxial compressive behavior of 15 RC columns and one plain concrete column jacketed with CFRP sheets. It was observed that the enhancement in deformability was greater for a rectangular cross-section, whereas the enhancement in strength was more pronounced for a circular cross-section.…”

Section: Introductionmentioning

confidence: 99%

Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Wu¹,

Wei²

2010

Engineering Structures

299

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Section: Introductionmentioning

confidence: 99%

Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Wu¹,

Wei²

2010

Engineering Structures

299

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“…A specimen is selected from an experimental study reported by Ilki et al, (NS-R-2-175-3-40) [7]. NS, R, 2, 175, 3, and 40 are representative of normal strength concrete, rectangular cross-section, cross-sectional aspect ratio, distance between transverse reinforcements in the test zone, CFRP layers number, and the corner radius, respectively.…”

Section: Description Of Modelmentioning

confidence: 99%

Finite Element Modeling of Axially Loaded CFRP-Confined Rectangular Reinforced Concrete Columns

Akbarpour

2016

Civ Eng J

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This paper investigates numerically the behaviour of rectangular RC columns strengthened with carbon fiber reinforced polymer (CFRP) composites under uniaxial loading. For this a reason, a parametric study is conducted and the effects of CFRP layers number, compressive strength of unconfined concrete, and fiber orientation on the behaviour of such columns have been studied. The number of CFRP layers has been changed from one to five layers while the fibers are oriented transversely. Compressive strength of unconfined concrete has been increased from 26 MPa to 45 MPa. In addition, three different fiber orientations are considered. The results show that an increase in the number of CFRP layers would enhance the ultimate strength of specimens. Although increasing the number of layers would not increase the ultimate strength of specimens exponentially, but the rate of strength gain would also decrease. Moreover, it is shown that lateral strains increase as the layer number increases. The effect of unconfined concrete strength on the ultimate strength is less for low strength concrete than high strength concrete. Evaluating the effect of fiber orientation shows that the maximum ultimate strength is obtained from transverse orientation and as the angle of orientation increases, the ultimate strength decreases.

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“…Consequently, the equation for determining the axial strength must include this value. Besides that, all researchers unanimously agreed on the fact that confinement is more effective when the concrete compressive strength is reduced [7]. wxi , wyi ith clear distance between two longitudinal bars along the two main directions in the cross-section plane respectively (mm) f'co compressive strength of unconfined concrete (MPa) α coefficient for the minimum eccentricity of applied axial load fl total lateral confining pressure (MPa) α1,α2 concrete strength enhancement factor flf confining pressure provided by FRP wraps (MPa) μ' volumetric ratio of the transverse steel reinforcement fls confining pressure provided by transverse steel reinforcement (MPa) μf FRP reinforcement ratio fyl yield strength of the longitudinal steel reinforcement (MPa) μs ratio of longitudinal steel reinforcement to total cross-section fys yield strength of the transverse steel reinforcement (MPa) μsc the longitudinal steel ratio relative to the concrete core section (Acc)…”

Section: Introductionmentioning

confidence: 98%

“…al. (2001) [6],Wang and Restrepo (2001),Tan (2002),Harajli et al (2006),Ilki et al (2006) [7],Rocca et al (2006) [9],Kumutha et al (2007) [10],Wang and Hsu (2008) [11], El Maaddawy et al (2010) [12], Toutanji et al (2010) [13], Chen et al (2011) [14], Hadi and Widiarsa (2012) [15], Wang et al (2012) [8], De Luca et.al (2013) [16], Raval and Dave (2013) [17], Triantafillou et al (2016) [18], Li et al (2017) [19], Eid and Paultre (2017) [20], Ahmed et al (2017) [4] and Kotp et al (2018) [5] and conducted in the current paper were included in the dataset. Since an evaluation of the performance of an analytical model depends largely on the quality and relevance of experimental data in the database, great care was exercised during the data collection.…”

mentioning

confidence: 99%

Predicting the Strength of Rectangular Reinforced Concrete Columns Confined with FRP Sheets

Tamrazyan

Sayed

2022

KEM

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A complete reorganization about the behavior of rectangular RC columns confined with FRP sheet is very important to predict the axial compressive strength values of the strengthened rectangular RC columns. That is because the process of strengthening RC rectangular column depending on several parameters that role this type of strengthening. These parameters include the characteristics of the used fiber, the grade of concrete and the geometry of the cross section including the rectangularity aspect ratio, corner radius, and size of specimens. Besides that, using a wide scope of experimental data may affect positively to generalize a model that considers the whole parameters affect the value of the axial strength. So, in this paper a review about parameters that affect the axial compressive strength values of rectangular RC columns was conducted. After that, based on the test results regarding FRP-confined rectangular RC columns available in the literature or conducted by the author, some existing confinement models for rectangular RC columns were assessed. Further, a new model is proposed through regression analysis of the database. A new model is proposed through regression analysis of the database. The proposed model was found to be in good agreement with the test results in the database. Finally, based on the results conclusions were drawn.

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Axial Behavior of Rc Columns Retrofitted With FRP Composites

Cited by 17 publications

References 18 publications

Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Effect of cross-sectional aspect ratio on the strength of CFRP-confined rectangular concrete columns

Finite Element Modeling of Axially Loaded CFRP-Confined Rectangular Reinforced Concrete Columns

Predicting the Strength of Rectangular Reinforced Concrete Columns Confined with FRP Sheets

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