From: Effective Length of Reinforced Concrete Columns in Braced Frames
Author | Frame desig. | (MPa) | Reinf. steel, f y (MPa) | Reinforcing steel ratio | Slenderness ratio | Col. e/h | Ultimate strength | Tested to computed strength | |||
---|---|---|---|---|---|---|---|---|---|---|---|
ρcol | ρbm | Col. ℓ/h | Beam ℓ/h | Tested strength (kN) | Computed strength (kN) | ||||||
Axial loads | |||||||||||
Breen and Ferguson (1964) | F1 | 27.9 | 349.1 | 0.017 | 0.045 | 30 | 30 | 0.300 | 240.0 | 220.3 | 1.090 |
F2 | 21.0 | 344.8 | 0.017 | 0.044 | 30 | 30 | 0.100 | 262.2 | 266.9 | 0.983 | |
F3 | 26.7 | 344.8 | 0.017 | 0.041 | 15 | 30 | 0.300 | 271.1 | 248.7 | 1.090 | |
F4 | 22.5 | 344.8 | 0.017 | 0.040 | 15 | 30 | 0.100 | 371.1 | 344.9 | 1.076 | |
F5 | 25.9 | 344.8 | 0.017 | 0.044 | 30 | 30 | 0.100 | 320.4 | 328.2 | 0.976 | |
Axial loads | |||||||||||
Furlong and Ferguson (1966) | FF1 | 23.9 | 349.7 | 0.018 | 0.065 | 20 | 17 | 0.116 | 266.7 | 271.3 | 0.983 |
FF2 | 29.7 | 378.6 | 0.018 | 0.065 | 20 | 31 | 0.106 | 273.8 | 316.1 | 0.866 | |
FF3 | 23.0 | 394.5 | 0.018 | 0.065 | 20 | 31 | 0.337 | 176.4 | 177.8 | 0.993 | |
FF4 | 22.3 | 372.4 | 0.018 | 0.065 | 20 | 17 | 0.222 | 233.3 | 195.6 | 1.193 | |
FF5 | 22.3 | 364.1 | 0.018 | 0.065 | 15 | 37 | 0.097 | 246.7 | 302.9 | 0.814 | |
FF6 | 24.5 | 349.0 | 0.018 | 0.065 | 15 | 37 | 0.320 | 202.2 | 201.6 | 1.003 | |
Axial loads | |||||||||||
Blomeier and Breen (1975) | B2 | 62.8 | 385.5 | 0.012 | 0.038 | 15 | 26 | 0.100 | 534.7 | 537.3 | 0.995 |
B3 | 38.7 | 381.4 | 0.012 | 0.038 | 15 | 26 | 0.100 | 443.6 | 374.0 | 1.186 |