Stress-Strain Relationship for FRP Repaired Concrete Columns

External wrapping with fiber-reinforced polymer (FRP) is one of the most efficient and effective techniques for the rehabilitation of reinforced concrete (RC) columns. Rehabilitation of a structure before it has suffered damage is referred to as retrofitting, whereas that undertaken after damage has occurred is called repair. Pre-damage inside a repaired column will affect the stress-strain behavior of the columns. To the best knowledge of the investigator, a stress-strain model for FRP repaired concrete is not available. It is observed that a stress-strain model for FRP retrofitted concrete is usually adopted in the evaluation of an FRP repair scheme, which could lead to misinterpretations or incorrect conclusions.The proposed project aims at developing a stress-strain model for FRP repaired concrete through experimental testing and analytical studies. The developed model will be useful for the evaluation of structural repair schemes.