Axial Compression Behavior of Circular Concrete-Filled High-Strength Thin-Walled Steel Tubular Columns with Out-of-Code D/t Ratios

Table 2

Results of the parametric study.

Specimen	D (mm)	D/t	L (mm)	fc (MPa)	fy (MPa)	Nnom (kN)	NFE (kN)	NFE/Nnom
CFST-1	140	70	525	40	690	1179	1513	1.283
CFST-2	140	70	525	80	690	1760	2026	1.151
CFST-3	140	70	525	120	690	2341	2574	1.099
CFST-4	180	90	675	40	690	1745	2082	1.193
CFST-5	180	90	675	80	690	2718	3015	1.109
CFST-6	180	90	675	120	690	3691	3991	1.081
CFST-7	220	110	825	40	690	2411	3010	1.248
CFST-8	220	110	825	80	690	3877	4361	1.125
CFST-9	220	110	825	120	690	5342	5809	1.087
CFST-10	260	130	975	40	690	3177	3794	1.194
CFST-11	260	130	975	80	690	5236	5708	1.090
CFST-12	260	130	975	120	690	7295	7681	1.053
CFST-13	300	150	1125	40	690	4044	4748	1.174
CFST-14	300	150	1125	80	690	6797	7428	1.093
CFST-15	300	150	1125	120	690	9550	10201	1.068
CFST-16	140	70	525	80	460	1561	1769	1.133
CFST-17	140	70	525	80	550	1639	1868	1.139
CFST-18	140	70	525	80	890	1934	2249	1.163
CFST-19	180	90	675	80	460	2461	2720	1.105
CFST-20	180	90	675	80	550	2561	2838	1.108
CFST-21	180	90	675	80	890	2942	3267	1.111
CFST-22	220	110	825	80	460	3562	3965	1.113
CFST-23	220	110	825	80	550	3685	4118	1.117
CFST-24	220	110	825	80	890	4151	4702	1.133
CFST-25	260	130	975	80	460	4863	5267	1.083
CFST-26	260	130	975	80	550	5009	5446	1.087
CFST-27	260	130	975	80	890	5560	6070	1.092
CFST-28	300	150	1125	80	460	6366	6931	1.089
CFST-29	300	150	1125	80	550	6535	7136	1.092
CFST-30	300	150	1125	80	890	7172	7814	1.090
CFST-31	300	75	1125	40	460	4390	5369	1.223
CFST-32	300	50	1125	40	460	5155	6578	1.276
CFST-33	300	75	1125	80	690	7924	9190	1.160
CFST-34	300	50	1125	80	690	9035	11022	1.220
CFST-35	300	75	1125	120	890	11346	12761	1.125
CFST-36	300	50	1125	120	890	12749	15149	1.188