Performance of Special-Shaped Concrete-Filled Square Steel Tube Column under Axial Compression

Table 1

Specimens in detail.

Specimen	Steel grade	H (mm)	D (mm)	H/D	t (mm)	λx0	λy0	α	ξ	NuT (kN)	NuFEA (kN)	NuFEA/NuT
L-1	Q235	600	200	3	4	9	12	0.18	1.4	2620	2363	0.90
L-2	Q355	600	200	3	4	9	12	0.18	2.1	3288	2999	0.91
L-3	Q235	600	200	3	6	9	12	0.29	2.3	3055	2909	0.95
L-4	Q235	900	200	4.5	4	13	18	0.18	1.4	2403	2211	0.92
L-5	Q235	1200	200	6	4	17	24	0.18	1.4	2239	2151	0.96
T-1	Q235	900	300	3	4	11	16	0.18	1.4	3140	3159	1.00
T-2	Q355	900	300	3	4	11	16	0.18	2.0	3808	3978	1.04
T-3	Q235	900	300	3	5	11	16	0.23	1.8	3817	3734	0.98
T-4	Q235	1200	300	4	5	15	21	0.23	1.8	3580	3521	0.98
T-5	Q235	1500	300	5	5	19	26	0.23	1.8	3350	3297	0.98