Table 4 Specifications of specimens.
Test group | Symbol | Section dimensions (mm × mm) | Longitudinal reinforcement | Transverse reinforcement dimensions (mm × mm) | Transverse reinforcement type | Size of transverse reinforcement | S (mm) | f’’c (MPa) | ρt (%) | ρl (%) | N (kN) | P0 (kN) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | R4T8-72 | 250 × 180 | 4Ф12 | 220 × 150 | Ties | Ф8 | 72 | 23.0 | 1.121 | 1.005 | 1256 | 1026 |
R4C8-72 | 250 × 180 | 4Ф12 | 220 × 150 | RSR | Ф8 | 72 | 23.0 | 1.130 | 1.005 | 1395 | 1026 | |
2 | S4T6-50 | 200 × 200 | 4Ф12 | 170 × 170 | Ties | Ф6 | 50 | 26.4 | 1.128 | 1.131 | 1263 | 1043 |
S4C6-50 | 200 × 200 | 4Ф12 | 170 × 170 | RSR | Ф6 | 50 | 26.4 | 1.131 | 1.131 | 1465 | 1043 | |
3 | S4T6-50d | 200 × 200 | 4Ф12 | 170 × 170 | Ties | Ф6 | 50 | 24.9 | 1.128 | 1.131 | 1216 | 992 |
S4C6-50d | 200 × 200 | 4Ф12 | 170 × 170 | RSR | Ф6 | 50 | 24.9 | 1.131 | 1.131 | 1394 | 992 | |
4 | S4T6-100 | 200 × 200 | 4Ф12 | 170 × 170 | Ties | Ф6 | 100 | 25.8 | 0.565 | 1.131 | 1242 | 1022 |
S4C6-100 | 200 × 200 | 4Ф12 | 170 × 170 | RSR | Ф6 | 100 | 25.8 | 0.570 | 1.131 | 1295 | 1022 | |
5 | S4T8-75 | 200 × 200 | 4Ф12 | 170 × 170 | Ties | Ф8 | 75 | 27.5 | 1.140 | 1.131 | 1349 | 1080 |
S4C8-75 | 200 × 200 | 4Ф12 | 170 × 170 | RSR | Ф8 | 75 | 27.5 | 1.149 | 1.131 | 1460 | 1080 | |
6 | S4T12-170 | 200 × 200 | 4Ф12 | 170 × 170 | Ties | Ф12 | 170 | 24.4 | 1.128 | 1.131 | 1206 | 975 |
S4C12-170 | 200 × 200 | 4Ф12 | 170 × 170 | RSR | Ф12 | 170 | 24.4 | 1.131 | 1.131 | 1268 | 975 | |
7 | S8T6-85 | 200 × 200 | 8Ф8 | 170 × 170 | Ties | Ф6 | 85 | 23.1 | 1.133 | 1.005 | 1242 | 917 |
S8C6-85 | 200 × 200 | 8Ф8 | 170 × 170 | RSR | Ф6 | 85 | 23.1 | 1.135 | 1.005 | 1236 | 917 |
