TY - JOUR
T1 - Non-linear finite-element investigation of the parameters affecting externally-bonded FRP flexural-strengthened RC beams
AU - Godat, Ahmed
AU - Chaallal, Omar
AU - Obaidat, Yasmeen
N1 - Funding Information:
The authors express their appreciation to the Research Affairs Office at the United Arab Emirates University for financial support of the project under fund grant 31N375 .
Publisher Copyright:
© 2020 The Author(s)
PY - 2020/12
Y1 - 2020/12
N2 - This paper presents a three-dimensional non-linear finite-element model developed to simulate the behaviour of reinforced-concrete (RC) beams strengthened in flexure with carbon fibre-reinforced polymers (CFRP). The model is used to identify the parameters that have a significant influence on the behaviour of FRP flexural-strengthened beams. The parameters investigated are the width, length, thickness, and elastic modulus of the FRP laminate, as well as the number of FRP layers. The effect of two flexural-strengthening schemes is studied: a beam with two FRP plates at the soffit of the beam beneath the longitudinal steel, and a beam with a double layer of CFRP plates on the bottom face of the beam. The accuracy of the finite-element model is validated against published experimental data. Comparisons between numerical predictions and test results show very reasonable accuracy in terms of ultimate load-carrying capacities, load-deflection relationships, and failure modes. Results of the parametric study indicate that for some parameters, there is a threshold for the contribution of FRP laminates. The effect of the two flexural-strengthening schemes on the behaviour of FRP flexural-strengthened beams is also demonstrated.
AB - This paper presents a three-dimensional non-linear finite-element model developed to simulate the behaviour of reinforced-concrete (RC) beams strengthened in flexure with carbon fibre-reinforced polymers (CFRP). The model is used to identify the parameters that have a significant influence on the behaviour of FRP flexural-strengthened beams. The parameters investigated are the width, length, thickness, and elastic modulus of the FRP laminate, as well as the number of FRP layers. The effect of two flexural-strengthening schemes is studied: a beam with two FRP plates at the soffit of the beam beneath the longitudinal steel, and a beam with a double layer of CFRP plates on the bottom face of the beam. The accuracy of the finite-element model is validated against published experimental data. Comparisons between numerical predictions and test results show very reasonable accuracy in terms of ultimate load-carrying capacities, load-deflection relationships, and failure modes. Results of the parametric study indicate that for some parameters, there is a threshold for the contribution of FRP laminates. The effect of the two flexural-strengthening schemes on the behaviour of FRP flexural-strengthened beams is also demonstrated.
KW - Fibre-reinforced polymers (FRP)
KW - Finite-element analysis
KW - Flexural strengthening
KW - Flexural-strengthening schemes
KW - Parametric study
KW - Reinforced-concrete (RC) beams
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U2 - 10.1016/j.rineng.2020.100168
DO - 10.1016/j.rineng.2020.100168
M3 - Article
AN - SCOPUS:85090925878
SN - 2590-1230
VL - 8
JO - Results in Engineering
JF - Results in Engineering
M1 - 100168
ER -