Performance Investigation Of FRP Strengthened Reinforced Concrete Circular Columns Under Axial Compressive Loading

Aiming at the problem of improving the performance of concrete member withcorroded rebar, the article focuses on reinforced corroded concrete member with FRPand conducts experimental study and theoretical analysis. The main research contentsin this experiment are as follows:（1）Mechanical properties of fourteen FRP sheets are tested under normaltemperature and the impacts of categories and layers of FRP sheet on mechanicalproperties are analyzed. The research results show that the elastic modulus of CFRPis considerably higher than that of GFRP while elongation of CFRP is lower undernormal temperature.（2）Twenty-eight reinforced corroded reinforcement concrete columns withFRP are tested. Longitudinal deformation shapes and transverse deformation shapesunder cylindrical load, transverse deformation shapes under FRP load are studied andthe influences of the categories and layers of fibers or rust corrosion rate of steel barson concrete columns are analyzed. The results are given: reinforced concrete columnswrapped with fiber fabric improve the bearing capacity of concrete columns to acertain extent and reinforcement effect of CFRP is superior to that of GFRP； Thebearing capacity of concrete columns is not significantly decreased and fiber fabricweakened the influence caused by rebar corrosion.（3）Based on the results of experiments, a model is established to calculateaxial compression capacity of reinforced corroded reinforcement concrete columnswrapped with FRP with degradation caused by reinforcement corrosion considered.