Table 4.
Flexural strength test results for Hwangtoh concrete beams.
| Specimens | Pcr (kN) | ∆cr (mm) | Py (kN) | ∆y (mm) | Pu (kN) | ∆u (mm) | Ductility Index(∆u/∆y) | Relative Ductility Index |
|---|---|---|---|---|---|---|---|---|
| Control | 42.5 | 0.84 | 112.1 | 4.09 | 129.56 | 29.6 | 7.24 | 1 |
| SC | 50.8 | 0.94 | 121.1 | 4.03 | 129.95 | 26.1 | 6.48 | 0.90 |
| KH | 45.5 | 0.82 | 120.2 | 4.29 | 130.54 | 26.4 | 6.15 | 0.85 |
| CH | 46.8 | 0.77 | 117.6 | 4.16 | 129.16 | 38.6 | 9.28 | 1.28 |
| KHS | 43.9 | 1.02 | 118.2 | 4.35 | 131.52 | 27.1 | 6.23 | 0.86 |
| CHS | 45.3 | 1.18 | 112.5 | 4.17 | 126.62 | 31.5 | 7.55 | 1.04 |
| KHSP | 42.9 | 0.76 | 117.2 | 4.29 | 140.00 | 59.8 | 13.94 | 1.93 |
| CHSP | 49.4 | 0.79 | 118.8 | 4.27 | 146.60 | 63.4 | 14.85 | 2.05 |
| RPET | 49.0 | 0.74 | 117.0 | 4.11 | 152.39 | 59.8 | 14.55 | 2.01 |
Notes: P and ∆ are the load and deflection of the member, respectively; cr is the initial crack condition; y and u are the yield and ultimate conditions, respectively.