Effect of fire on FRP reinforced concrete members

Saafi, Mohamed

doi:10.1016/s0263-8223(02)00045-4

Cited by 196 publications

(125 citation statements)

References 4 publications

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“…For instance, the effect of fire on the shear behaviour of RC beams exposed to elevated temperatures, and improvement of the strength and the durability of fire-resistant concrete have been reviewed by ElHawary et al and Chung and Consolazio, respectively [21,22]. The nonlinear analyses of reinforced concrete columns and temperature diversity on sections during fire have been investigated, and these were used as heat loads to perform numerical analysis [23][24][25]. Tan et al have studied on fire resistance of reinforced concrete columns subjected to one, two and three surface heating [26].…”

Section: Introductionmentioning

confidence: 99%

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

2010

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SUMMARYConcrete protects the steel inside against several effects of the external environment. One of the most important of these effects is high temperature. Cover plays a critical role in concrete's protection on reinforcement against high temperature. In this study, the changes after high temperatures in mechanical properties of the reinforcement steels placed between 3 and 5 cm covers inside the mortar specimen prepared with CEM I 42.5 R and CEM II/B-M (P-L) 32.5 R cements were investigated. In order to ensure 3 and 5 cm covers 76×76×310 and 116×116×350 mm sized reinforced mortar specimen were prepared. These reinforced mortar specimens were exposed to 20, 100, 200, 300, 500 and 800 • C temperatures and after that on the steels taken out of these mortar specimen tensile strength, tests were applied in order to determine the mechanical properties. With the tensile strength tests performed stress-strain curves of the steel bars exposed to several temperatures were drawn. Besides, the yield and ultimate strengths of the steel bars were determined. The results of the study have shown that the larger the covers, the better the steel bars are protected against high temperatures.

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Section: Introductionmentioning

confidence: 99%

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

2010

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“…Nevertheless, it is difficult to differentiate between the two types of strains. This is worth noting here that steel may have around 60% of its normal strength and stiffness properties left at a temperature of 500 o C (Saafi 2002). The rapid deflection after this temperature during the test is an indication of the effects created by strain due to end restraints, which produced early yielding in the steel, and the beam eventually failed at a bar temperature of around 645 o C when the steel could still have enough strength.…”

Section: Elevated Temperature Testsmentioning

confidence: 97%

Experimental Behaviour of Carbon FRP Reinforced Concrete Beams at Ambient and Elevated Temperatures

Rafi

Nadjai

2008

ACT

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The applications of fibre reinforced polymer (FRP) bars in buildings can provide a potential market for their use. Since buildings may be exposed to elevated temperatures, the behaviour of carbon FRP (CFRP) reinforced concrete (RC) beams was studied at high temperatures and compared with normal temperature behaviour. Steel RC beams were used as control specimens. The failure modes of beams at normal and elevated temperatures were found to be the same. The stiffness of cracked FRP RC was less than steel reinforced concrete at normal temperature whereas FRP reinforced beams were stiffer than steel RC beams at elevated temperatures.

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“…Blontrock et al [12] suggested the tensile strength of carbon fiber reinforced plastic (CFRP) and aramid fiber reinforced plastic (AFRP) remains unaffected up to 100 °C but that of GFRP bars decreased consistently with the increase of the temperature. In this paper, two models proposed by Saafi [13] and Bisby [14] for degradation of GFRP bars at elevated temperatures are considered. Figure 1 compares the strength and elastic modulus degradation for GFRP composites in Saafi and Bisby's models.…”

Section: Materials Behaviour At High Temperaturesmentioning

confidence: 99%

Numerical Study of FRP Reinforced Concrete Slabs at Elevated Temperature

2014

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Abstract:One-way glass fibre reinforced polymer (GFRP) reinforced concrete slabs at elevated temperatures are investigated through numerical modeling. Serviceability and strength requirements of ACI-440.1R are considered for the design of the slabs. Diagrams to determine fire endurance of slabs by employing "strength domain" failure criterion are presented. Comparisons between the existing "temperature domain" method with the more representative "strength domain" method show that the "temperature domain" method is conservative. Additionally, a method to increase the fire endurance of slabs by placing FRP reinforcement in two layers is investigated numerically. The amount of fire endurance gained by placing FRP in two layers increases as the thickness of slab increases.

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Effect of fire on FRP reinforced concrete members

Cited by 196 publications

References 4 publications

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

Experimental Behaviour of Carbon FRP Reinforced Concrete Beams at Ambient and Elevated Temperatures

Numerical Study of FRP Reinforced Concrete Slabs at Elevated Temperature

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