Table 4 Summary of the test results.
Group | Specimen Designation | \(f\)(MPa) | Normalized ultimate load PU (kN) | Ratio of ultimate loads (%) | Deflection at ultimate load (mm) | Fracture energy (kN-m) | Energy Ductility Index | Initial stiffness (kN/mm) | Stiffness Increase (%) |
|---|---|---|---|---|---|---|---|---|---|
SA | SA0* | 43.7 | 49 | - | 14.58 | 0.563 | - | 4.6 | - |
SA-H15-A | 36.5 | 59.6 | 21.63% | 11.763 | 0.3935 | 0.7 | 5.58 | 20.9% | |
SA-H15-O | 36.5 | 62.94 | 28.44% | 11.84 | 0.4466 | 0.79 | 6.32 | 37.03% | |
SA-H20-A* | 32.4 | 69.16 | 41.14% | 13.15 | 0.752 | 1.34 | 7.232 | 56.8% | |
SA-C15-A* | 38.3 | 69.7 | 42.24% | 10.94 | 0.813 | 1.44 | 7.14 | 54.8% | |
SB | SB0 | 33.6 | 93.57 | - | 11.77 | 0.711 | - | 9.81 | - |
SB-H15-A | 36.5 | 98.9 | 5.7% | 10.09 | 0.566 | 0.796 | 10.742 | 9.5% | |
SB-H15-O | 30 | 108.25 | 15.7% | 11.6 | 0.729 | 1.03 | 11.324 | 15.4% | |
SB-H20-A | 36.5 | 100.35 | 7.25% | 10.16 | 0.597 | 0.84 | 11.7 | 19.25% | |
SB-H15(2)-A | 35 | 102.43 | 9.47% | 11.32 | 0.6972 | 0.98 | 11.48 | 17% | |
SB-C15-A | 41.5 | 117.01 | 25% | 11.07 | 0.7166 | 1 | 10.89 | 11.12% |