Adequately FRP confined reinforced concrete columns under axial compressive monotonic or cyclic loading

Rousakis, Theodoros; Karabinis, Athanasios I.

doi:10.1617/s11527-011-9810-1

Cited by 109 publications

(50 citation statements)

References 32 publications

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“…In a few cases, as also observed in the LSRA specimen, FRP rupture was close to one of the corners. In contrast with the observations done here, studies, such as Ilki et al [3], Wang and Wu [25], Wu and Wei [26] and Rousakis and Karabinis [27], report the common FRP rupture location as corner regions of square and rectangular cross-sections. The difference may be attributed to the configuration of the pin supports of the compressometer.…”

Section: Residual Capacity Testscontrasting

confidence: 99%

The Effects of Loading Rate and Duration on the Axial Behavior of Low-Strength and Medium-Strength Noncircular Concrete Members Confined by Fiber-Reinforced Polymer Sheets

et al. 2014

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Abstract:In this study, 36 concrete specimens with square cross-sections and different concrete qualities were tested either under uniaxial compression at different loading rates or subjected to sustained uniaxial stresses after externally jacketing with carbon fiber-reinforced polymer (CFRP) sheets. The main test parameters were the loading rate and the applied sustained stress level. Among these parameters, the loading rate varied in the range of 0.0002 and 0.04 strain/min. In the case of short-term creep tests under sustained loads, three stress levels (between 0.73 f' cc and 0.90 f' cc or 2.76 f' cc and 3.37 f' cc ) for low-strength and four stress levels (between 0.69 f' cc and 0.92 f' cc or 0.89 f' co and 1.20 f' co ) for medium-strength prisms were applied. The test results showed that the stress-strain behavior of CFRP-confined concrete was affected by the change in loading rate, and external CFRP confinement enhanced the creep performance of concrete significantly. For low-strength concrete specimens, higher strain rates did not bring higher strength values; however, an increase in strength was obvious for medium-strength prisms. On the other hand, for both concrete qualities, the specimens loaded at slower strain rates exhibited better deformability. None of the specimens of the medium-strength concrete failed during the short-term creep tests; however, three of the low-strength concrete prisms failed during the tests. The results of residual strength tests showed that sustained loading did not cause a strength or ultimate deformation capacity loss, but affected the residual strain capacities. OPEN ACCESSPolymers 2014, 6 1686

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Section: Residual Capacity Testscontrasting

confidence: 99%

The Effects of Loading Rate and Duration on the Axial Behavior of Low-Strength and Medium-Strength Noncircular Concrete Members Confined by Fiber-Reinforced Polymer Sheets

et al. 2014

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“…However, for closely spaced transverse bars, the behaviour was found to be more ductile. Rousakis and Karabinis (2012) focused on premature buckling of FRP confined columns supported by transverse steel subject to load-unload cyclic loading. The results found significant variations in the behaviour of confined FRP columns and is an area which warrants further research.…”

Section: Ductilitymentioning

confidence: 99%

Active confinement of weakened concrete columns

Holmes¹,

Niall²,

O’Shea³

2014

Mater Struct

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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%

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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Adequately FRP confined reinforced concrete columns under axial compressive monotonic or cyclic loading

Cited by 109 publications

References 32 publications

The Effects of Loading Rate and Duration on the Axial Behavior of Low-Strength and Medium-Strength Noncircular Concrete Members Confined by Fiber-Reinforced Polymer Sheets

The Effects of Loading Rate and Duration on the Axial Behavior of Low-Strength and Medium-Strength Noncircular Concrete Members Confined by Fiber-Reinforced Polymer Sheets

Active confinement of weakened concrete columns

Compressive Behavior of Concrete Confined with GFRP Tubes and Steel Spirals

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