Table 7 Fire test and residual strength test results (Ryu et al. 2018) compared with number of pixels obtained from the proposed CNN model.
Specimens | Fire test results | Residual strength test results | The number of pixels excluding pore edges from the proposed CNN model | Ratio of pixel numbers to P1-60 | |||
|---|---|---|---|---|---|---|---|
Temperature at mid span (c) | Ratio of temp to P1-60 | Maximum load (kN) | Stiffness (kN/mm) | Ratio of stiffness to P1-60 | |||
P1-60 | 184.7 | 1.00 | 174.6 | 4.05 | 1.00 | 11,683,021 | 1.00 |
P1-120 | 528.9 | 2.86 | 169.9 | 3.28 | 0.81 | 17,638,559 | 1.51 |
P2-60 | 160.8 | 0.87 | 178.8 | 3.69 | 0.91 | 13,619,863 | 1.17 |
P2-120 | 568.8 | 3.08 | 174 | 2.91 | 0.72 | 18,303,122 | 1.57 |
P3-60 | 312.1 | 1.69 | 172.6 | 3.36 | 0.83 | 14,972,710 | 1.28 |