NUMERICAL STUDY ON THE BEHAVIOUR OF CFRP AND BFRP STRENGTHENED RC BEAM-COLUMN JOINT WITH BEAM OPENING UNDER CYCLIC LOADING

Abstract

Beam-column joint is the most important part of any framed building structure. In many cases due to mechanical, electrical and plumbing needs openings are made in beam column joint at transverse beam section. Many times, these openings are made without checking the strength requirement of joint. Presence of these opening may cause detrimental effect on structure especially considering the effect of seismic loads. Which brings in the requirement of strengthening of the beam-column joint to prevent premature failure resulting in endangering the life of people and structure. The various strengthening techniques used of discussion are; fibre reinforced polymer (FRP) composites, Ferrocement, Steel plate etc. The purpose of this study the efficiency of retrofitting beam column junctions with transverse beam opening a with Carbon Fiber Reinforced Polymer (CFRP) and Basalt Fiber Reinforced Polymer (BFRP). Analysis can be done numerically to assess the performance of the original and improved joint models using nonlinear finite element analysis. The performance has been investigated in terms of load carrying capacity, deflection, failure pattern and displacement ductility. The parameters of study include; Size, shape, distance of opening from joint and thickness of FRP used.