Experimental Study of Concrete Beams Reinforced with GFRP Rebars Exposed to High Temperatures

Daněk, Petr; Rozsypalová, Iva; Ondrej, Karel

doi:10.4028/www.scientific.net/kem.808.177

Cited by 4 publications

(3 citation statements)

References 6 publications

(7 reference statements)

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“…-Good correlation between numerical models and experimentally obtained data was observed, with differences in ultimate bending resistance ranging between 6-28%. It has to be stated, that the conclusions listed above are representative but limited to the test configuration, specimen geometry and properties of the materials used within this numerical study and experimental program presented in [1][2][3]. Further analysis is needed to prove abovementioned statements and allow its wider use in design of FRP reinforcement concrete members exposed to fire.…”

Section: Discussionmentioning

confidence: 97%

“…The presented numerical models correspond to the experimentally investigated concrete beams reinforced with either steel or non-metallic reinforcement, as described in for ex. [1][2][3]. Boundary conditions correspond to the experimental test setup [1] and to behaviour of the simple beams in 4-point bending, with a support span of 1000 mm and load span of 300 mm.…”

Section: Introductionmentioning

confidence: 99%

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Possibilities of using numerical modelling to determine the residual load capacity of concrete elements with composite reinforcement after fire

Prokeš

Rozsypalová

Cairovic

et al. 2022

J. Phys.: Conf. Ser.

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During the service life of a structure, a number of phenomena occur that can affect the ability of the concrete structure to continue to perform its function. In the case of concrete load-bearing elements, fire and its effects represent significant influencing factor. Exposure to fire can, among other things, cause a great reduction of material properties of both concrete and reinforcement itself, but also affect their interaction. After a fire incident, it is necessary to assess the residual load capacity of the reinforced concrete elements. As part of the diagnostic work, material samples are usually taken from the structure after a fire. The purpose of the present paper was to investigate whether the experimentally obtained material characteristics can be used to verify the basic behaviour of concrete structures after fire. The structural material properties were used as input values for simplified numerical models of the structures. ATENA Cervenka Consulting software was chosen to construct a numerical model simulating the behaviour of the structural elements after exposure to fire loads. Finally, the effect of high temperatures on the residual load capacity of the beams determined by the numerical approach was compared with the experimental values of the load capacity of the beams after fire. The behaviour of concrete beams of dimensions 100 × 150 × 1800 mm reinforced with composite reinforcement was investigated. The specimens exposed to temperatures of 1000°C were subjected to mechanical bending tests after cooling to determine their residual load capacity.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Possibilities of using numerical modelling to determine the residual load capacity of concrete elements with composite reinforcement after fire

Prokeš

Rozsypalová

Cairovic

et al. 2022

J. Phys.: Conf. Ser.

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“…1 Autor de corespondencia: Technological Universidad of Havana, "José Antonio Echeverría" (CUJAE) -Havana, CUBA E-mail: iselcarmen@civil.cujae.edu.cu La mayoría de los estudios experimentales o numéricos que se han realizado hasta la fecha en elementos de hormigón armado con PRF expuestos a fuego, se han centrado en el comportamiento a flexión de los mismos (Adam et al, 2015); (Bilotta et al, 2020); (Gao et al, 2016); (Kodur y Agrawal, 2016); (Petr et al, 2019); (Rafi et al, 2011), siendo pocos aquellos dirigidos a evaluar la resistencia a cortante .…”

Section: Introductionunclassified

Simplified methods to determine shear strength in reinforced concrete beams with fiber-reinforced polymers exposed to fire

et al. 2021

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The importance of structural design under fire conditions, together with the uncertainty in the behavior and resistance of reinforced concrete structures with fiberreinforced polymer bars (FRP) at high temperatures, reveal the need for more research along these lines. Although there are studies evaluating the flexural and shear strength of elements exposed to fire, there are no standards nor regulations specifying the procedures thereto. This work proposes methods to calculate shear strength in FRP-reinforced concrete beams, with rectangular cross-section, based on the degradation of the properties of the materials and/or the reduced concrete crosssection, as recommended by (Diab, 2014), Eurocode 2 (EN-1992-1-2, 2004 and (Saafi, 2002). In accordance with the thermal analysis executed with the Super Tempcalc software, these procedures were applied to 13 beams of different dimensions and reinforcements, subjected to standard fire of the ISO-834 standard on three sides, thereby obtaining the shear capacity degradation curves for each case. The results show that the differences between the shear strength values were very small throughout the total fire exposure time.

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Residual load-bearing capacity of fire-exposed concrete beams reinforced with FRP bars

Prokeš

Rozsypalová

Girgle

et al. 2021

SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference

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Experimental Study of Concrete Beams Reinforced with GFRP Rebars Exposed to High Temperatures

Cited by 4 publications

References 6 publications

Possibilities of using numerical modelling to determine the residual load capacity of concrete elements with composite reinforcement after fire

Possibilities of using numerical modelling to determine the residual load capacity of concrete elements with composite reinforcement after fire

Simplified methods to determine shear strength in reinforced concrete beams with fiber-reinforced polymers exposed to fire

Residual load-bearing capacity of fire-exposed concrete beams reinforced with FRP bars

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