Research Article
Seismic Behavior Experimental Study on the Joint of Circular Tubed Steel-Reinforced Concrete Columns
Table 4
Ductility index of specimens.
| | Specimen | Displacement ductility coefficient | Interlaminar deformation angle and ductility coefficient | | φy (rad) | φu (rad) | μφ = φu/φy |
| | SH-1 | Positive | 4.28 | 0.00905 | 0.0388 | 4.29 | | Reverse | 4.77 | 0.00703 | 0.0335 | 4.77 |
| | SH-2 | Positive | 5.76 | 0.00679 | 0.0391 | 5.76 | | Reverse | 5.20 | 0.00658 | 0.0342 | 5.20 |
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