BEHAVIOUR OF CONCRETE COLUMNS WITH GFRP CIRCULAR AND RECTILINEAR CONFINING REINFORCEMENT

摘要

Glass Fibre-Reinforced Polymer (GFRP) bars are becoming a feasible alternative to steel bars to produce corrosion-free reinforced concrete structures. In an effort to assess the effectiveness GFRP spirals and GFRP rectilinear ties as internal reinforcement in columns, an extensive research program is underway at the University of Toronto. Fifteen 356 mm diameter full-scale circular columns and sixteen 305 mm x 305 mm cross-section square columns were constructed and tested under simulated earthquake loading. This extended abstract presents an example comparison of the experimental behaviour of circular and square concrete columns with internal reinforcement comprising of steel longitudinal bars and GFRP lateral spirals or ties. Results are presented in the form of moment vs. curvature response and shear vs. lateral deflection behaviour.