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Dr. Gehan Abd-el-Rahman Ahmed Hamdy :: Publications:

Title:
Performance of FRP-Strengthened Reinforced Concrete Beams in Fire
Authors: Osama O. El-Mahdy, Gehan A. Hamdy, Moustafa A. Refaei
Year: 2017
Keywords: Fire; fire performance; thermal insulation; numerical modeling; fiber reinforced polymers (FRP); reinforced concrete beams; flexural strengthening
Journal: 16th European Conference on Fire Retardancy and Protection of Materials FRPM 2017, 3 – 6 July, 2017 Manchester, UK
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: 16th European Conference on Fire Retardancy and Protection of Materials FRPM 2017, 3 – 6 July, 2017 Manchester, UK
Local/International: International
Paper Link: Not Available
Full paper Gehan Abd-el-Rahman Ahmed Hamdy_2017-FRPM17-Performance of FRP-Strengthened Reinforced Concrete Beams in Fire.pdf
Supplementary materials Not Available
Abstract:

FRP strengthening systems are mainly used to retrofit existing and deficient structural members. The performance of such strengthened structures at elevated temperatures is a critical issue that threatens the safety of the structure. Published research includes experimental testing of reinforced concrete beams strengthened using FRP and subjected to fire tests. However, there is a need for numerical tools that simulate the performance of these FRP-strengthened elements in case of fire. This research work presents numerical modeling and nonlinear analysis conducted to assess the performance of reinforced concrete beams strengthened with externally bonded carbon FRP sheets when subjected to standard fire conditions. Finite element model using the general purpose software ANSYS 12.1 is developed and validated with experimental results published in the literature by other researchers. The developed finite element model achieved good correlation with the experimental results. Further, application of the validated finite element model is extended into a parametric study to explore the influence of different variables on the performance of the FRP system when subjected to fire. Different aggregate types, moisture contents, concrete cover thickness, insulation material types and insulation material thickness are included in the study. The developed finite element model is thus regarded a valid and economical alternative to experiments for prediction of the performance of FRP strengthened and insulated RC beams under fire conditions. Additionally, it can be used for estimation of the fire rating of such structures as well as for design of adequate fire protection layers.

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