Gravity Load Collapse Behavior of Nonengineered Reinforced Concrete Columns

Table 3

Summaries of the column specimens test results.

Specimen	12L-0.2	12L-0.6	9L-0.2	9L-0.6
Ultimate strength concrete (MPa)	4.80	3.80	4.00	5.40
Longitudinal reinforcing ratio	0.75	0.75	0.31	0.31
Maximum lateral load (kN)	23.25	16.32	13.80	15.65
Drift at maximum load (%)	1.50	1.26	1.50	0.76
Lateral load at 80% of peak load (kN)	18.60	13.06	11.40	12.52
Drift at 80% of peak load (%)	3.00	1.76	3.08	1.26
Lateral load at axial failure (kN)	0.89	1.20	0.67	0.85
Drift at axial failure (%2)	3.49	1.76	4.06	1.79