Experimental Study and Direct Strength Method for Cold-Formed Steel Built-Up I-Sectional Columns under Axial Compression

Table 1

Nominal dimensions of sections.

Specimen	h (mm)	b (mm)	a (mm)	t (mm)	L (mm)	fcrl	fcrd	fcre	λl	λd	λc	λ
DC7510	75	40	10	1	500	186	291.4	783.6	2.05	1.37	0.84	33.31
					1500			122.14	0.81		2.12	99.94
					2000			73.16	0.63		2.74	133.25
DC10008	100	90	10	0.8	500	54	60	1562	5.38	3.03	0.59	15.45
					1500			130.2	1.55		2.06	46.35
					2000			104.4	1.39		2.30	61.79
DC9008	90	50	15	0.8	500	84	204	1131.1	3.67	1.64	0.70	25.78
					1500			177.6	1.45		1.76	77.33
					2000			103.8	1.11		2.30	103.10
DC8008	80	60	10	0.8	500	94.8	120.7	952	3.17	2.13	0.76	22.56
					1500			123.8	1.14		2.11	67.67
					2000			73.9	0.88		2.73	90.23