Assessment of creep rupture and long-term performance of GFRP bars subjected to different environmental exposure conditions under high sustained loads

Esmaeili, Yasin; Mohamed, Khaled; Newhook, John; Benmokrane, Brahim

doi:10.1016/j.conbuildmat.2021.124327

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…Some contrasting findings on the strength and stiffness characteristics of GFRP bars in the alkaline environment have been reported in the earlier studies. For example, Esmaeili et al 43 reported an inverse relationship between the strength loss and diameter of GFRP bars in contradiction to the findings of Arczewska, Polak, and Penlidis 44 and that of Benmokrane et al 45 Similarly, varied findings have been reported with regard to the reduction in elastic modulus of GFRP bars in the alkaline environment at elevated temperature 46,47 . Researchers are not in agreement with regard to the effect of bar embedment length on the bond strength.…”

Section: Introductionmentioning

confidence: 91%

Factors influencing strength loss of glass‐fiber‐reinforced composite bars in highly alkaline environment of concrete

Nassar

Dominguez

Soroushian

et al. 2022

Structural Concrete

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Steel corrosion is a significant problem of concrete‐based infrastructure, and it increases the repair costs of the damage to structures. Glass‐fiber‐reinforced polymer (GFRP) composite bars are corrosion‐proof and exhibit relatively higher strength than ordinary steel reinforcement. However, GFRP bars degrade when exposed to the highly alkaline environment of concrete over extended periods. This study focuses on the effect of the high alkalinity of concrete on the tensile strengths of several types of GFRP bars. Different accelerated aging techniques were employed to evaluate the effects of GFRP characteristics (fiber volume fraction, matrix composition, bar diameter, and presence of protective coating) on the alkali resistance. The test results indicated that the alkali attack significantly decreased the tensile strength of GFRP, increasing with age. The alkali resistance of the GFRP bars increased up to a fiber volume fraction of 50% but decreased when the fiber volume fraction increased to 60% and above. The effects of protective coating on alkali resistance were generally positive but not consistent, and the effects of the matrix type and bar diameter on the alkali resistance of GFRP bars were insignificant. Accelerated aging did not change the bond strength but altered the failure mechanism associated with the bond failure of the specimens.

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Section: Introductionmentioning

confidence: 91%

Factors influencing strength loss of glass‐fiber‐reinforced composite bars in highly alkaline environment of concrete

Nassar

Dominguez

Soroushian

et al. 2022

Structural Concrete

View full text Add to dashboard Cite

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Lifespan prediction of glass fiber reinforced polymers subjected to flexural creep and elevated temperatures using analytical and numerical analyses

Alhayek,

Syamsir,

Supian

et al. 2024

Polymer Composites

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This paper presents the experimental, analytical, and numerical extensive investigation into the flexural creep performance of pultruded glass fiber reinforced polymer (pGFRP) composites at elevated service temperatures. The experimental phase involved a physical testing program on pGFRP coupons in a four‐point bending setup covering a wide range of loads (12%, 24%, and 37% stress levels) and temperature conditions (20, 40, and 60°C) over a long test duration of 720 h. The analytical Burgers model was employed to provide theoretical insights into the time‐dependent deformation behaviors, while the finite element analysis (FEA) simulations using derived reduction factor validated the accuracy of the proposed procedure. Burgers model was able to capture the experimental data very well and reached the ultimate strain failure limit within about 1.4–50 years depending on the case. The proposed simple FEA procedure yielded a pattern closely resembling the one observed from Burgers model in which they resulted in estimated endurance times with a roughly 15% difference between them.Highlights The higher stress and/or temperature, the longer the primary creep stage is. Burgers model is able to capture the experimental data very well in all conditions. Burgers general equation is able to predict failure within about 1.4–50 years. A proposed reduction factor based on Burgers model is utilized in FEA The FEA procedure shows a roughly 15% difference compared to Burgers model.

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Effect of plasma treatment on hygrothermal creep behaviour of flax fibre composite

Hao,

Bardon,

Mertz

et al. 2024

Composites Part A: Applied Science and Manufacturing

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Assessment of creep rupture and long-term performance of GFRP bars subjected to different environmental exposure conditions under high sustained loads

Cited by 7 publications

References 9 publications

Factors influencing strength loss of glass‐fiber‐reinforced composite bars in highly alkaline environment of concrete

Factors influencing strength loss of glass‐fiber‐reinforced composite bars in highly alkaline environment of concrete

Lifespan prediction of glass fiber reinforced polymers subjected to flexural creep and elevated temperatures using analytical and numerical analyses

Effect of plasma treatment on hygrothermal creep behaviour of flax fibre composite

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