Research on Tensile Mechanical Properties of GFRP Rebar after High Temperature

Fu, Yucheng; Zhao, Jun; Li, Ya Li

doi:10.4028/www.scientific.net/amr.181-182.349

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Experimental data showing the reduction in tensile strength of CFRP, GFRP and AFRP with temperature from 15 sources have been reported in the literature 14 .In an attempt to evaluate the response of FRP reinforced concrete members subjected to fire, researchers 15 measured the tensile strength of CFRP and GFRP rods at elevated temperatures up to 700 o C. The ultimate tensile strength of CFRP sheets at elevated temperatures has also been measured [16][17][18] . Researchers have also investigated the effect of temperature on the tensile strength of GFRP rebars [19][20][21][22][23] and GFRP sheets…”

Section: Tensile Strength and Modulus Of Elasticity Of Frps At Elevat...mentioning

confidence: 99%

“…Its variation with temperature has also been studied by a wide range of researchers. Experimental results regarding its variation in CFRP 14,15,18,25,26 , GFRP 14,15,[19][20][21][24][25][26] and AFRP 14,25 specimens have been reported meticulously in the literature. Table 1 shows the tested temperature range in the different experimental series.…”

Section: Tensile Strength and Modulus Of Elasticity Of Frps At Elevat...mentioning

confidence: 99%

See 1 more Smart Citation

Fiber-Reinforced Polymer-Strengthened/Reinforced Concrete Structures Exposed to Fire: A Review

Maraveas¹,

Miamis²,

Vrakas³

2012

Structural Engineering International

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The fire resistance of concrete members reinforced or strengthened with fiber reinforced polymer (FRP) materials is an extremely crucial area that needs to be investigated prior to implementing FRP composites in buildings and other structures vulnerable to fire. A review on the fire performance of fiber-reinforced polymer (FRP) materials and FRP-strengthened / reinforced concrete members is presented. The review includes the mechanical properties of various types of FRP materials at elevated temperatures (based on experimental results). The behavior of bond adhesive epoxies and the bond of FRP reinforcement are investigated under elevated temperature effects. Experimental (fire test) results and numerical studies for unprotected concrete members strengthened or reinforced with FRPs (beams, columns, slabs) including failure patterns, as well as respective results for insulated concrete members, together with the type of insulation materials are also presented. The measured evolution of temperature at distinct locations within the cross-section of the tested element and the role of insulation are discussed. Factors that significantly influence the fire resistance of FRP strengthened or FRP reinforced systems are discussed and preliminary guidelines for the efficient design of such systems in a fire environment are provided.

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Section: Tensile Strength and Modulus Of Elasticity Of Frps At Elevat...mentioning

confidence: 99%

Section: Tensile Strength and Modulus Of Elasticity Of Frps At Elevat...mentioning

confidence: 99%

Fiber-Reinforced Polymer-Strengthened/Reinforced Concrete Structures Exposed to Fire: A Review

Maraveas¹,

Miamis²,

Vrakas³

2012

Structural Engineering International

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“…In the test, the aging days of the GFRP rebars in alkali solution are 100 days, 300 days, and 660 days, which are normal immersion periods considered in the accelerated aging test. Also, two levels of preheating temperature conditions (120 ∘ C, 200 ∘ C) are considered as similar to the temperature ranges adopted in the previous "postheating tension test" [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Such type of test is called "hot tension test." Another testing type is "postheating tension test" [9][10][11][12]. In postheating tension tests the GFRP bars are firstly exposed to temperatures between 100 ∘ C and 400 ∘ C for 0.5 to 3 hours.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Effects of Concrete Alkalinity on Tensile Properties of Preheated Structural GFRP Rebar

Roh

Park

Moon

2017

Advances in Materials Science and Engineering

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The combined effects of preexposure to high temperature and alkalinity on the tensile performance of structural GFRP reinforcing bars are experimentally investigated. A total of 105 GFRP bar specimens are preexposed to high temperature between 120 ∘ C and 200 ∘ C and then immersed into pH of 12.6 alkaline solution for 100, 300, and 660 days. From the test results, the elastic modulus obtained at 300 immersion days is almost the same as those of 660 immersion days. For all alkali immersion days considered in the test, the preheated specimens provide slightly lower elastic modulus than the unpreheated specimens, showing only 8% maximum difference. The tensile strength decreases for all testing cases as the increase of the alkaline immersing time, regardless of the prehearing levels. The tensile strength of the preheated specimens is about 90% of the unpreheated specimen for 300 alkali immersion days. However, after 300 alkali immersion days the tensile strengths are almost identical to each other. Such results indicate that the tensile strength and elastic modulus of the structural GFRP reinforcing bars are closely related to alkali immersion days, not much related to the preheating levels. The specimens show a typical tensile failure around the preheated location.

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A Comparison of Residual Tensile Properties of GFRP Reinforcing Bar at High Temperature and after Exposure to High Temperature

Kim¹,

Moon²

2015

Journal of the Korean Society of Civil Engineers

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Tensile tests were conducted on the GFRP reinforcement exposed to high temperature. The exposure condition for this study was below 200°C for about 3 minutes. This conditioning is minor compared with that presented in experimental program conducted by other researchers. The residual tensile strength and elastic modulus of GFRP reinforcing bars at high temperature and after exposure to high temperature were compared. In results, tensile properties were decreased at high temperatures, but those after exposure to high temperature were recovered to pre-heating level almost completely. These results could be valuable for evaluating GFRP reinforced structure damaged by fire accident.

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Research on Tensile Mechanical Properties of GFRP Rebar after High Temperature

Cited by 3 publications

References 1 publication

Fiber-Reinforced Polymer-Strengthened/Reinforced Concrete Structures Exposed to Fire: A Review

Fiber-Reinforced Polymer-Strengthened/Reinforced Concrete Structures Exposed to Fire: A Review

Experimental Investigation of the Effects of Concrete Alkalinity on Tensile Properties of Preheated Structural GFRP Rebar

A Comparison of Residual Tensile Properties of GFRP Reinforcing Bar at High Temperature and after Exposure to High Temperature

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