Specimen | Diameter (mm) | Thickness (mm) | Axial Force (kN) | Axial compression ratio | \( f_{\text{c}}^{\text{s}} \) (MPa) | f cuk (MPa) | f ck (MPa) | Reinforcement(mm2) |
---|---|---|---|---|---|---|---|---|
Tube1 | 500 | 50 | 180 | 0.09 | 28.88 | 38.1 | 25.5 | 1178 (15C10) |
Tube2 | 500 | 100 | 360 | 0.09 | 31.92 | 42.0 | 28.1 | 1257 (16C10) |
Tube3 | 500 | 50 | 434 | 0.20 | 27.36 | 36.0 | 24.1 | 1728 (22C10) |
Tube4 | 500 | 70 | 422 | 0.15 | 34.96 | 46.4 | 31.0 | 1571 (20C10) |