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A platform for research: civil engineering, architecture and urbanism
GFRP reinforced concrete slabs in fire: Finite element modelling
https://orcid.org/0000-0002-5932-2640
Highlights The FE model predicted the temperatures within the GFRP RC slabs. The heat transfer model can predict temperatures in unexposed anchor zones. Coefficient of thermal expansion is very important in predicting deflections. The tensile stress in GFRP bars increased as temperature increased. The model can be used to reach a fire safe and efficient design in FRP RC structures.
Abstract In a fire incident, service loads are present when the structure is engulfed by the fire. This sequence of structural loading followed by the heat exposure is employed in the finite element (FE) modelling of GFRP reinforced concrete (RC) slabs. The FE model is validated against two sets of full-scale fire tests of GFRP RC slabs and one set of steel RC slabs. The FE model successfully predicts temperature distribution within the elements as well as the rapid thermal bowing deflections due to the temperature gradient within the depth of the slabs. The heat transfer analysis parameters were modified to achieve a realistic heat distribution in the unexposed zones. The paper discusses the various parameters in modelling of reinforced concrete in a fire and identifies the coefficient of thermal expansion (CTE) of the concrete and reinforcing bars as the most significant parameter in predicting the deflection behaviour in a fire. The FE modelling showed that stress in the GFRP reinforcing bars increases rapidly at the beginning of the fire (first 30 min) and becomes steady after that. The model is an effective tool to predict the required concrete cover and the unexposed anchor zones to achieve the desired fire resistance.
GFRP reinforced concrete slabs in fire: Finite element modelling
https://orcid.org/0000-0002-5932-2640
Highlights The FE model predicted the temperatures within the GFRP RC slabs. The heat transfer model can predict temperatures in unexposed anchor zones. Coefficient of thermal expansion is very important in predicting deflections. The tensile stress in GFRP bars increased as temperature increased. The model can be used to reach a fire safe and efficient design in FRP RC structures.
Abstract In a fire incident, service loads are present when the structure is engulfed by the fire. This sequence of structural loading followed by the heat exposure is employed in the finite element (FE) modelling of GFRP reinforced concrete (RC) slabs. The FE model is validated against two sets of full-scale fire tests of GFRP RC slabs and one set of steel RC slabs. The FE model successfully predicts temperature distribution within the elements as well as the rapid thermal bowing deflections due to the temperature gradient within the depth of the slabs. The heat transfer analysis parameters were modified to achieve a realistic heat distribution in the unexposed zones. The paper discusses the various parameters in modelling of reinforced concrete in a fire and identifies the coefficient of thermal expansion (CTE) of the concrete and reinforcing bars as the most significant parameter in predicting the deflection behaviour in a fire. The FE modelling showed that stress in the GFRP reinforcing bars increases rapidly at the beginning of the fire (first 30 min) and becomes steady after that. The model is an effective tool to predict the required concrete cover and the unexposed anchor zones to achieve the desired fire resistance.
GFRP reinforced concrete slabs in fire: Finite element modelling
https://orcid.org/0000-0002-5932-2640
Highlights The FE model predicted the temperatures within the GFRP RC slabs. The heat transfer model can predict temperatures in unexposed anchor zones. Coefficient of thermal expansion is very important in predicting deflections. The tensile stress in GFRP bars increased as temperature increased. The model can be used to reach a fire safe and efficient design in FRP RC structures.
Abstract In a fire incident, service loads are present when the structure is engulfed by the fire. This sequence of structural loading followed by the heat exposure is employed in the finite element (FE) modelling of GFRP reinforced concrete (RC) slabs. The FE model is validated against two sets of full-scale fire tests of GFRP RC slabs and one set of steel RC slabs. The FE model successfully predicts temperature distribution within the elements as well as the rapid thermal bowing deflections due to the temperature gradient within the depth of the slabs. The heat transfer analysis parameters were modified to achieve a realistic heat distribution in the unexposed zones. The paper discusses the various parameters in modelling of reinforced concrete in a fire and identifies the coefficient of thermal expansion (CTE) of the concrete and reinforcing bars as the most significant parameter in predicting the deflection behaviour in a fire. The FE modelling showed that stress in the GFRP reinforcing bars increases rapidly at the beginning of the fire (first 30 min) and becomes steady after that. The model is an effective tool to predict the required concrete cover and the unexposed anchor zones to achieve the desired fire resistance.
GFRP reinforced concrete slabs in fire: Finite element modelling
Hajiloo, Hamzeh (author) / Green, Mark F. (author)
Engineering Structures ; 183 ; 1109-1120
2019-01-06
12 pages
Article (Journal)
Electronic Resource
English
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