Nonlinear finite element modeling of reinforced concrete beam–column joints retrofitted using various plates configurations of carbon fiber-reinforced polymers

• Published in: Computational particle mechanics 2024, Vol.11 (3), p.1329-1344
• Main Authors: Abu-Farsakh, Ghazi A. F. R., Obaidat, Yasmeen Taleb, Al-harahsheh, Hitham
• Format: Article
• Language: English
• Subjects: Beam-columns; Bonded joints; Carbon fiber reinforced concretes; Carbon fiber reinforced plastics; Carbon fiber reinforcement; Classical and Continuum Physics; Computational Science and Engineering; Concrete properties; Configurations; Cyclic loads; Engineering; Failure modes; Fiber reinforced polymers; Finite element method; Joints (junctions); Plates; Polymers; Reinforced concrete; Retrofitting; Theoretical and Applied Mechanics; Thickness
• ISSN: 2196-4378; 2196-4386
• DOI: 10.1007/s40571-023-00690-y

This study examines the behavior of reinforced concrete beam columns joints retrofitted using externally bonded carbon fiber-reinforced polymer plates using a nonlinear finite element model. The internal beam column joint was studied under the monotonic loading. The finite element models were calibrated and verified by comparing the resulted load-drift ratio responses and failure modes with the previous experimental studies. The investigated parameters were as follows: configurations of carbon fiber-reinforced polymer plates. The carbon fiber-reinforced polymer plate thickness and concrete compressive strengths. The results showed that applying monotonic loading instead of cyclic loading and comparing it to the envelopes of experimental curves was considered to be a good alternative approach to represent the cyclic loading. Generally, the finite element model results demonstrated that adding carbon fiber-reinforced polymer plates to the beam column joints increased its loading capacity by 60–139.8%. Increasing the plate thickness of carbon fiber-reinforced polymer slightly enhanced the joint’s loading capacity, but increasing the concrete strength for constant thickness of carbon fiber-reinforced polymer plate had significantly enhanced the joint’s loading capacity. All simulated slabs failed in debonding carbon fiber-reinforced polymer plate.