Design a non slender circular column with six vertical rebars and circumferential rebar cage, subjected to a factored ultimate loading Vu = 3.78 × 106 N.
The section properties are: concrete, f'c = 27.57 MPa, diameter D = 500 mm; longitudinal steel reinforcement, As = 1, 406.72 mm2, fy = 413 MPa; FRP, f'fu= 3, 800 MPa, ε'fu = 0.0167, tf = 0.30 mm.