SEISMIC PERFORMANCE AND DESIGN OF CONCRETE COLUMNS CONFINED WITH CFRP GRIDS

This research describes an experimental investigation carried out to verify the use of fiber reinforced polymer (FRP) grids as transverse reinforcement in concrete structures. Emphasis was placed on concrete confinement and seismic performance. Large-scale column specimens were tested under simulated seismic loading. Column reinforcement cages consisted of ordinary steel reinforcement as longitudinal bars and FRP grids as transverse reinforcement. Test parameters included grid spacing and pattern, the volumetric ratio of grid reinforcement, and the level of axial load. Results indicate improved deformability of columns, when confined by properly designed grids. Other findings are also reported and discussed in detail.