Post-fire residual properties of GFRP reinforced concrete slabs: A holistic investigation

Hajiloo, Hamzeh; Green, Mark F.

doi:10.1016/j.compstruct.2018.06.047

Cited by 27 publications

(16 citation statements)

References 14 publications

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“…e working dimensions of the high temperature furnace are 1500 × 500 × 500 mm 3 . e acceptable temperatures in the furnace range from room temperature to 1000°C with an accuracy of ±1°C.…”

Section: Ermal Treatment and Cooling Of Carbonated Concretementioning

confidence: 99%

“…In recent years, concrete has been increasingly used, and frequent building fires have caused huge damages to concrete structures [1,2]. Concrete is generally an inert material, and short-time elevated temperatures slightly affect the performances of it when initially exposed to fire [3,4]. However, relatively long-time exposure would inevitably change the chemical composition and physical and mechanical properties severely.…”

Section: Introductionmentioning

confidence: 99%

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Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Xie

Zhang

Yin³

et al. 2019

Advances in Materials Science and Engineering

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Fires are always known for seriously deteriorating concrete in structures, especially for those with certain carbonation due to long-time service. In this paper, 75 prism specimens were prepared and divided into four groups (three carbonated groups and one uncarbonated group). Specimens were tested under different temperatures (20, 300, 400, 500, 600, and 700°C), exposure times (3, 4, and 6 hours), and cooling methods (water and natural cooling). Surface characteristics, weight loss rate, and residual mechanical properties (strength, initial elastic modulus, peak, and ultimate compressive strains) of carbonated concrete specimens after elevated temperatures were investigated and compared with that of the uncarbonated ones. Results show that the weight loss rates of the carbonated concrete specimens are slightly lower than that of the uncarbonated ones and that the cracks are increased with raising of temperatures. Surface colors of carbonated concrete are significantly changed, but they are not sensitive to cooling methods. Surface cracks can be evidently observed on carbonated specimens when temperature reaches 400°C. Residual compressive strength and initial elastic modulus of carbonated concrete after natural cooling are generally larger than those cooled by water. The peak and ultimate compressive strains of both carbonated and uncarbonated concrete specimens increase after heating, but the values of the latter are greater than that of the former. Finally, the constitutive equation to predict the compressive behaviors of carbonated concrete after high temperatures was established and validated by tests.

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Section: Ermal Treatment and Cooling Of Carbonated Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Xie

Zhang

Yin³

et al. 2019

Advances in Materials Science and Engineering

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“…There have been numerous experimental and numerical studies on the fire performance of RC slabs [1][2][3][4][5][6][7][8][9][10][11]. However, there are limited studies on the residual load capacity of RC slabs to assess the extent of fire damage and reusability [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, Hajiloo and Green [12], Gao et al [20] and Gooranorimi et al [21] investigated the residual strength of fire-exposed GFRP-RC slabs. Contrary to RC slabs, GFRP-reinforced slabs frequently undergo bond-related failures.…”

Section: Introductionmentioning

confidence: 99%

Post-fire behaviour of continuous reinforced concrete slabs under different fire conditions

Yong

Jiang

Huang

et al. 2021

Engineering Structures

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An experimental investigation of the performance of reinforced concrete continuous slabs is presented in this paper, following the exposure of the slabs to different compartment fires. The influence that several factors, including compartment fire scenarios, reinforcement ratio, and bar arrangement, have on the deflections, strains, crack patterns, and failure modes is analysed. Results that compared to the uniform fire case, localized or extended punching shear failure modes are more likely to occur in the fire-damaged slabs subjected to the traveling fire due to more cracks. The residual structural stiffness and ultimate loads are enhanced with the increasing reinforcing ratio, but the brittle punching failure readily appeared. Finally, the deflection failure criterion (l/50) and the ACI 318-08 punching shear theory are helpful in predicting the residual ultimate loads of the fire-damaged slabs subjected to any fire scenario.

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“…At present, the effects of temperature on building materials are of great interest [14][15]. These investigations are often focused on the fire resistance of composite rebars in concrete that replace conventional steel reinforcements [16][17]. Similar to the present study, an article explores the possibilities of improving the fire resistance of phenol formaldehyde matrix composites through pyrolysis after moulding [18].…”

Section: Introductionmentioning

confidence: 82%

Potential of Glass, Basalt or Carbon Fibres for Reinforcement of Partially Pyrolysed Composites With Improved Temperature and Fire Resistance

Černý¹

2019

Ceramics - Silikaty

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The study considers the mechanical properties and temperature resistance of partially pyrolysed composites reinforced with various fibres. The composites were prepared by pyrolysis at 650 °C, where only partial conversion of the polymer to the inorganic SiOC structure takes place in the matrix. Such a hybrid matrix bears resemblance to polymeric materials in a density and Young's modulus, but oxidation resistance and creep behaviour are closer to silicate glasses. Pyrolysis also ensures that the whole composite material is non-flammable with very low potential for releasing toxic gases during a fire. Three types of glass fibres (E-glass, R-glass, E-CR-glass fibres), two types of basalt fibres, and two types of high-strength (HS) carbon fibres were used as reinforcements. The mechanical properties-Young's and shear moduli, flexural strength, and fracture toughness-were measured at room temperature. Thermogravimetric measurements and creep tests of these composites allowed estimation of their temperature resistance and fire resistance. The results obtained suggest that the materials under investigation can be applied as panels or shells in the building industry and in transportation facilities.

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Post-fire residual properties of GFRP reinforced concrete slabs: A holistic investigation

Cited by 27 publications

References 14 publications

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete

Post-fire behaviour of continuous reinforced concrete slabs under different fire conditions

Potential of Glass, Basalt or Carbon Fibres for Reinforcement of Partially Pyrolysed Composites With Improved Temperature and Fire Resistance

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