Experimental study on seismic retrofit and repair of circular reinforcement concrete short columns by fiber reinforced plastic

An experimental study was carried out on seismic behavior of reinforcement concrete bridge short column retrofitted and repaired with fiber reinforced plastic. The total of four half-scale circular reinforced concrete columns were tested under reversed cyclic lateral force and constant axial load in double bending configuration. In order to provide a basis for comparison, one as-built column was tested. The other two column samples were tested after being retrofitted with GFRP and CFRP, respectively. The as-built column was repaired after failure. Experimental results showed the as-built column developed an unstable behavior and failed in brittle shear mode. The ductility and energy dissipation ability of all retrofitted and repaired samples were significantly improved.