ABSTRACT
Eight large-scale columns were manufactured. The confined-concrete columns were subjected to axial loading. The test parameters of the wrapped columns are given in Tables 1a, b. The columns had a total length of 2m, a longitudinal steel reinforcement ratio of 0.9% and 8mm diameter stirrups spaced every 140mm. Extra stirrup reinforcement was provided at the column ends. All columns have a 400mm circular cross-section. Except for columns K6 and K7, the FRP is applied over the total area (full wrapping) in a circular way, providing 200mm overlap length in the circumferential direction (no overlap was provided in the longitudinal direction). For columns K6 and K7 partial wrapping is applied, either in a circular way with a clear spacing of 200mm (K6) or in a helicoidal
way with a pitch of 400mm and a clear spacing of 200mm (K7).
