Tests of Inclined Concrete-Filled Steel Tubular Stub Columns under Vertical Cyclic Loading

Table 2

Ductility factor and equivalent viscous damping.

Number	Sample	Ductility in compression			Ductility in tension			Equivalent viscous damping ratio
		(mm)	(mm)	(deg)	(mm)	(mm)	(deg)	Elastic	Inelastic
1	T1.8C0A0	0.25	0.70	2.80	0.30	5.10	17.00	6.5	25.1
2	T1.8C0A4	0.15	1.00	6.67	0.25	4.75	19.00	7.3	23.2
3	T1.8C0A9	0.15	1.40	9.33	0.25	4.90	19.60	4.5	22.2
4	T1.8C20A0	0.6	3.5	5.83	0.2	4.5	22.50	6.9	26.0
5	T1.8C20A4	0.5	5.0	10.00	0.15	5	33.33	5.2	23.1
6	T1.8C20A9	0.35	5.2	14.86	0.15	4.85	32.33	5.9	24.7
7	T1.8C40A0	0.45	2.45	5.44	0.35	2.75	7.86	5.2	14.4
8	T1.8C40A4	0.5	4.25	8.50	0.3	4.6	15.33	5.2	23.6
9	T1.8C40A9	0.5	5.0	10.00	0.3	4.85	16.17	5.7	15.7
10	T3.0C0A0	0.25	1.60	6.40	0.30	4.20	14.00	3.5	24.4
11	T3.0C0A4	0.10	2.4	12.00	0.15	4.15	27.67	3.3	26.3
12	T3.0C0A9	0.20	3.1	15.50	0.15	4.10	27.33	4.1	25.2
13	T3.0C20A0	0.7	3.75	5.36	0.4	4.1	10.25	6.2	28.7
14	T3.0C20A4	0.4	4.4	11.00	0.5	3.5	7.00	4.8	25.5
15	T3.0C20A9	0.4	5.1	12.75	0.4	2.95	7.38	2.3	22.7