The evolution of and the way forward for advanced polymer composites in the civil infrastructure

Hollaway, L.

doi:10.1016/s0950-0618(03)00038-2

Cited by 163 publications

(71 citation statements)

References 13 publications

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“…Fibre Reinforced Polymer (FRP) bars consisting of glass, carbon or aramid fibres encased in a matrix of epoxy, polyester or phenolic thermosetting resins were developed as economical substitute of conventional steel bars to overcome the corrosion problems. FRP materials possess high tensile strength to weight ratio and are nonmagnetic, noncorrosive and nonconductive (Hollaway 2003).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Circular Concrete Columns Reinforced with GFRP Bars and Helices under Different Loading Conditions

2016

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Glass-fiber-reinforced polymer (GFRP) bar has emerged as a preferable alternative to steel bar in reinforced concrete (RC) members in harsh, corrosive, coastal environments in order to eliminate corrosion problems. However, only limited experimental studies are available on the performance and behavior of concrete columns reinforced with GFRP bars under different loading conditions. This study investigates the use of GFRP bars and GFRP helices (spirals) as longitudinal and transversal reinforcement, respectively, in RC columns. A total of 12 circular concrete specimens with 205-mm diameter and 800-mm height were cast and tested under different loading conditions. The effect of replacing steel with GFRP reinforcement and changing the spacing of the GFRP helices on the behavior of the specimens was investigated. The experimental results show that the axial load and bending moment capacity of the GFRP-RC columns are smaller than those of the conventional steel-RC columns. However, the ductility of the GFRP-RC columns was very close to the ductility of the steel-RC columns. It is concluded that ignoring the contribution of the GFRP bars in compression leads to a considerable difference between analytical and experimental results. The experimental results show that the axial load and bending moment capacity of the GFRP-RC columns are smaller than those of the conventional steel-RC columns. However, the ductility of the GFRP-RC columns was very close to the ductility of the steel-RC columns. It Page 2 of 52 is concluded that ignoring the contribution of the GFRP bars in compression leads to a considerable difference between analytical and experimental results.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Circular Concrete Columns Reinforced with GFRP Bars and Helices under Different Loading Conditions

2016

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“…Corrosion of steel reinforcement is a considerable issue in humid and aggressive areas and causes large maintenance cost and the loss of the performance of structural components [2,3]. Different methods such as the use of galvanised or stainless steel bars, epoxy coating and cathodic protection have been used to protect reinforcement from corrosion [4][5][6][7].…”

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

121

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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.

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“…Fiber Reinforced Polymers (FRPs) are attractive materials for civil engineering applications because of their high strength to weight ratio, corrosion resistance and good durability [1][2][3]. When used in bridges, FRP is subjected to significant cyclic stresses due to traffic loads.…”

Section: Introductionmentioning

confidence: 99%

Improving Fatigue Performance of GFRP Composite Using Carbon Nanotubes

Genedy

Daghash

Soliman

et al. 2015

Fibers

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Glass fiber reinforced polymers (GFRP) have become a preferable material for reinforcing or strengthening reinforced concrete structures due to their corrosion resistance, high strength to weight ratio, and relatively low cost compared with carbon fiber reinforced polymers (CFRP). However, the limited fatigue life of GFRP hinders their use in infrastructure applications. For instance, the low fatigue life of GFRP caused design codes to impose stringent stress limits on GFRP that rendered their use non-economic under significant cyclic loads in bridges. In this paper, we demonstrate that the fatigue life of GFRP can be significantly improved by an order of magnitude by incorporating Multi-Wall Carbon Nanotubes (MWCNTs) during GFRP fabrication. GFRP coupons were fabricated and tested under static tension and cyclic tension with mean fatigue stress equal to 40% of the GFRP tensile strength. Microstructural investigations using scanning electron microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy were used for further investigation of the effect of MWCNTs on the GFRP composite. The experimental results show the 0.5 wt% and the 1.0 wt% MWCNTs were able to improve the fatigue life of GFRP by 1143% and 986%, respectively, compared with neat GFRP.

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The evolution of and the way forward for advanced polymer composites in the civil infrastructure

Cited by 163 publications

References 13 publications

Experimental Investigations on Circular Concrete Columns Reinforced with GFRP Bars and Helices under Different Loading Conditions

Experimental Investigations on Circular Concrete Columns Reinforced with GFRP Bars and Helices under Different Loading Conditions

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

Improving Fatigue Performance of GFRP Composite Using Carbon Nanotubes

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