TY - GEN
T1 - Modelling the Bond of GFRP Bar and Concrete for the Thermo-mechanical Behaviour of RC Slabs
AU - Veljkovic, Ana
AU - Carvelli, Valter
AU - Rezazadeh, Mohammadali
N1 - Funding Information: The research was developed in the framework of the Marie Curie Initial Training Networks ? ?endure? European Network for Durable Reinforcement and Rehabilitation Solutions, project no: 607851. The third author also acknowledges the support provided by FEDER and FCT funds within the scope of the project StreColesf (POCI-01-0145-FEDER-029485).
PY - 2021/11/27
Y1 - 2021/11/27
N2 - Present study aims to develop a 3D thermo-mechanical numerical model to better understand the influence of elevated temperature on the bond between the GFRP bars and concrete in RC structural elements. The relevant constitutive thermal and mechanical parameters of the bond were calibrated using experimental measurements, including pull-out tests under different elevated temperatures. The accuracy of the numerical thermo-mechanical predictions was first confirmed by pull-out test simulation, then the modelling strategy was transferred to RC thin slabs. Good accordance of experimental and numerically predicted temperature fields was followed by the verification of the complete methodology through comparison of experimental and numerical thermo-mechanical slabs’ response. The relevant laboratory experimental measurements and observations confirmed the accuracy of the developed numerical modelling, emphasizing the importance of proper selection of material parameters and their temperature dependencies. This work contributes to the improvement of simulation strategies for GFRP RC structures in elevated temperature environments and tends to increase the confidence in adopting GFRP reinforcement bars in concrete design.
AB - Present study aims to develop a 3D thermo-mechanical numerical model to better understand the influence of elevated temperature on the bond between the GFRP bars and concrete in RC structural elements. The relevant constitutive thermal and mechanical parameters of the bond were calibrated using experimental measurements, including pull-out tests under different elevated temperatures. The accuracy of the numerical thermo-mechanical predictions was first confirmed by pull-out test simulation, then the modelling strategy was transferred to RC thin slabs. Good accordance of experimental and numerically predicted temperature fields was followed by the verification of the complete methodology through comparison of experimental and numerical thermo-mechanical slabs’ response. The relevant laboratory experimental measurements and observations confirmed the accuracy of the developed numerical modelling, emphasizing the importance of proper selection of material parameters and their temperature dependencies. This work contributes to the improvement of simulation strategies for GFRP RC structures in elevated temperature environments and tends to increase the confidence in adopting GFRP reinforcement bars in concrete design.
KW - Bond
KW - Finite element modelling
KW - GFRP bar
KW - RC slab
KW - Thermo-mechanical behaviour
UR - https://www.scopus.com/pages/publications/85121898665
U2 - 10.1007/978-3-030-88166-5_84
DO - 10.1007/978-3-030-88166-5_84
M3 - Conference contribution
AN - SCOPUS:85121898665
SN - 9783030881658
T3 - Lecture Notes in Civil Engineering
SP - 963
EP - 972
BT - 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021
A2 - Ilki, Alper
A2 - Ispir, Medine
A2 - Inci, Pinar
PB - Springer
T2 - 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021
Y2 - 8 December 2021 through 10 December 2021
ER -