Reducing the potential seismic damage of reinforced concrete frames using plastic hinge relocation by FRP

Due to its distinct properties, Fibre reinforced polymer (FRP) has become the product of choice in many retrofitting applications of existing reinforced concrete structures. Relocation of potential plastic hinges using FRP can greatly improve the seismic resistant capacity of reinforced concrete structures and results in lower damage levels comparing to un-retrofitted frames if subjected to similar earthquake excitations. The aim of the current study is to quantify the effect of plastic hinge relocation on the potential damage of a reinforced concrete frame subjected to different seismic levels based on current seismic designs. The paper presents the reduced damage indices and quantifies the positive change on the damage states of the frame. The limitation of the technique is also discussed.