Seismic Performance of Beam-Column Joints Reinforced With GFRP Headed Bars Mohamed H. Hasaballa PhD Candidate, Dept. of Civil Eng., University of Manitoba, Winnipeg, MB, Canada Ehab F. El-Salakawy Canada Research Chair Professor, Dept. of Civil Eng., University of Manitoba, Winnipeg, MB, Canada ABSTRACT Concrete beams, slabs and recently columns reinforced with Fibre-Reinforced Polymers (FRP) reinforcements have shown considerable deformability under monotonic and fatigue loading. The behaviour of FRP bars under tension-compression load reversals in reinforced concrete (RC) beam-column joints and frame structures has not been fully investigated yet. Furthermore, concerns still remain regarding the ability of FRP-RC frame structures to dissipate energy in seismic loading events due to the elastic-linear behaviour of the FRP reinforcement. This paper attempts to partially fulfill this gab by investigating the structural performance and ultimate capacity of concrete beam-column connections reinforced with glass FRP bars. Two full-scale exterior beam-column joint (T-shaped) prototypes were constructed and tested under simulated seismic load conditions. The main test parameter is the detailing of the beam longitudinal bars within the joint by using either straight-headed bars or bent bars. Test results are presented in terms of load-drift ratio and load-strains in longitudinal reinforcement relationships. The experimental results showed a superior performance for the straight-headed bars over the bent ones. KEYWORD Seismic performance, beam-column joints, GFRP headed bars, GFRP bent bars, drift ratio F1B01