Seismic Analysis of Reinforced Concrete Exterior Wide Beam-Column Joints using Fiber Reinforced Polymer

In reinforced concrete structures, beam column joints are considered as most damageable structural element subjected to lateral loads. This research aims to the finite element study of exterior wide beam column joints by using fiber reinforced polymers by considering horizontal cyclic loads. This topic of work was decided as the present scenario of the beam column joints are the most venerable failures due to poor work man ship and lack of detailing of reinforcement. These failures can be rehabilitated by using glass and carbon fiber reinforced polymers at the exterior wide beam column joints. Use of fiber reinforced polymer (FRP) composites for strengthening of beams and columns in RC structures has attracted great attention in recent decades. The free end of the column is subjected to cyclic loading. Three specimen is considered and one is unstrengthened, second one is strengthened with CFRP and third one is strengthened with GFRP were modelled and analysed. An effective re-habitation strategy is in order to increase the ductility of the wide beam column joint and transfer the failure mode to beam or delay the shear failure mode. The stress and deformation results were evaluated and compared their results with strengthened and unstrengthened specimen. The numerical result shows that the beam column joint strengthened with CFRP and GFRP can increase their structural stiffness, strength, ductility and energy dissipation capacity.