Axial Capacity of Circular Concrete Columns Reinforced with GFRP Bars and Spirals

Afifi, Mohammad Z.; Mohamed, Hamdy M.; Benmokrane, Brahim

doi:10.1061/(asce)cc.1943-5614.0000438

Cited by 241 publications

(122 citation statements)

References 8 publications

Supporting

Mentioning

109

Contrasting

Unclassified

Order By: Relevance

“…Few experimental studies were conducted to investigate the influence of replacing steel bars with FRP bars on the behaviour of square and circular concrete columns under concentric loads [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Axial load-axial deformation behaviour of circular concrete columns reinforced with GFRP bars and helices

Karim

Sheikh

Hadi

2016

Construction and Building Materials

118

View full text Add to dashboard Cite

Fibre Reinforced Polymer (FRP) bars has attracted a significant amount of research attention in the last three decades to overcome the problems associated with the corrosion of steel reinforcing bars in reinforced concrete members. A limited number of studies, however, have investigated the behaviour of concrete columns reinforced with FRP bars. Also, available design standards either ignore the contribution of or do not recommend the use of GFRP bars in compression members. This study reports the results of experimental investigations of concrete specimens reinforced with GFRP bars and GFRP helices as longitudinal and transverse reinforcement, respectively. A total of five circular concrete columns of 205 mm in diameter and 800 mm in height were cast and tested under axial compression. The experimental results showed that reducing the spacing of the GFRP helices or confining the specimens with CFRP sheet led to improvements in the strength and ductility of the specimens. Also, an analytical model has been developed for the axial loadaxial deformation behaviour of the circular concrete columns reinforced with GFRP bars and helices. The model has been validated with the experimental results.

show abstract

Section: Introductionmentioning

confidence: 99%

Axial load-axial deformation behaviour of circular concrete columns reinforced with GFRP bars and helices

Karim

Sheikh

Hadi

2016

Construction and Building Materials

118

View full text Add to dashboard Cite

show abstract

“…Numerical studies make it possible to observe changes in the nature of the stressed state, to identify areas of stress concentration, to estimate the influence of the percentage of reinforcement on the stress state of the elements, for example, a sample with a diameter of 150 mm (Table 1). Transbud-2017 8 Thus, it can be stated that the investigated glass-composite reinforcement works in compressed elements similarly to metal. In connection with the fact that the initial modulus of elasticity is higher than that of concrete, it takes on a part of the stresses in proportion to its modulus of elasticity.…”

Section: Numerical Studies Of the Stress-strain State Of Compressed Cmentioning

confidence: 93%

“…Nevertheless, as it was shown in [8,9], the compressive strength of composite reinforcement should not be neglected.…”

Section: Analysis Of the Recent Studies And Publicationsmentioning

confidence: 99%

“…Transbud-2017 8 The values of Poisson's ratios are obtained as follows 0.02 and 0.033 and relative shortening at a destructive load of 1.02% and 0.69% for rods with a diameter of 10 and 25 mm, respectively. A linear relationship between stresses and strains is established up to failure, the modulus of elasticity at compression (47.9 GPa -Ø10, 48.7 GPa -Ø25) is less than in tension (51 GPa -Ø10.52 GPa -Ø25) by 6%.…”

Section: Fig 1 Schemes Of Testing Composite Samples For Axial Comprmentioning

confidence: 99%

“…Measurement of longitudinal and transverse deformations of concrete was carried out similarly to concrete samples. In order to measure the longitudinal deformations of the ACGR reinforcement, strain-gages with a base of 10 mm were glued at 120 0 along the Transbud-2017 8 circumference of the rods in the middle part of the samples in amount of 6 pieces (Fig. 5).…”

Section: Experimental Studies Of Compressed Concrete Elements With Comentioning

confidence: 99%

See 2 more Smart Citations

Study of the stress-strain state of compressed concrete elements with composite reinforcement

et al. 2017

View full text Add to dashboard Cite

Abstract. The efficiency analysis of the application of glass composite reinforcement in compressed concrete elements as a load-carrying component has been performed. The results of experimental studies of the deformation-strength characteristics of this reinforcement on compression and compressed concrete cylinders reinforced by this reinforcement are presented. The results of tests and mechanisms of sample destruction have been analyzed. The numerical analysis of the stress-strain state has been performed for axial compression of concrete elements with glasscomposite reinforcement. The influence of the reinforcement percentage on the stressed state of a concrete compressed element with the noted reinforcement is estimated. On the basis of the obtained results, it is established that the glass-composite reinforcement has positive effect on the strength of the compressed concrete elements. That is, when calculating the load-bearing capacity of such structures, the function of composite reinforcement on compression should not be neglected.

show abstract

Behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns with glass fiber‐reinforced polymer cages

Ali

Sheikh

Hadi

2021

Structural Concrete

View full text Add to dashboard Cite

In this study, the behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns reinforced with glass fiber‐reinforced polymer (GFRP) bars and helices was investigated. Ten ambient‐cured geopolymer concrete columns of 160 mm diameter and 640 mm height were cast and tested under concentric axial loads. The behavior of the columns was investigated under the effect of the type of reinforcement (steel vs. GFRP), pitch of the GFRP helices (40, 75, 100 mm), and addition of nonmetallic fibers, that is, glass fiber and polypropylene fiber. It was found that GFRP bar reinforced geopolymer concrete column achieved less axial load, confinement efficiency, and ductility compared to the geopolymer concrete column reinforced with the same amount of the steel reinforcement. Overall, the reduction in the pitch of the GFRP helices enhanced the confinement efficiency, post‐peak behavior, and ductility of the plain and fiber‐reinforced geopolymer concrete columns. Also, the addition of fibers significantly improved the ductility of the GFRP bar reinforced geopolymer concrete columns.

show abstract

Axial Capacity of Circular Concrete Columns Reinforced with GFRP Bars and Spirals

Cited by 241 publications

References 8 publications

Axial load-axial deformation behaviour of circular concrete columns reinforced with GFRP bars and helices

Axial load-axial deformation behaviour of circular concrete columns reinforced with GFRP bars and helices

Study of the stress-strain state of compressed concrete elements with composite reinforcement

Behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns with glass fiber‐reinforced polymer cages

Contact Info

Product

Resources

About