Compression Behavior of CFST Stub Columns with Holes

Table 1

Parameters of the tested CFST column.

Sectional type	No.	Specimen	B (D)  ×  t (mm)	L	h	d	l	Nue (kN)		SI		DI		Eurocode 4 (2004)
		label		(mm)	(mm)	(mm)	(mm)	Measured	Average	Measured	Average	Measured	Average	NEC4/kN	NEC4/Nue
Square	1	s1-1	□-200   ×   2.92	600				3074	3100	0.992	1.000	1.224	1.217	2914	0.948
	2	s1-2	□-200  ×  2.92	600				3125		1.008		1.209		2914	0.932
	3	s2-1	□-200  ×  2.92	600	100	80	50	2894	2898	0.934	0.935	1.155	1.154	2621	0.906
	4	s2-2	□-200  ×  2.92	600	100	80	50	2901		0.936		1.152		2621	0.903
	5	s3-1	□-200  ×  2.92	600	200	80	50	2805	2852	0.905	0.920	1.133	1.136	2621	0.934
	6	s3-2	□-200  ×  2.92	600	200	80	50	2899		0.935		1.138		2621	0.904
	7	s4-1	□-200  ×  2.92	600	300	80	50	2736	2782	0.883	0.897	1.113	1.119	2621	0.958
	8	s4-2	□-200  ×  2.92	600	300	80	50	2827		0.912		1.124		2621	0.927
	9	s5-1	□-200  ×  2.92	600	200	160	50	2300	2291	0.742	0.739	1.118	1.105	2329	1.013
	10	s5-2	□-200  ×  2.92	600	200	160	50	2282		0.736		1.092		2329	1.021
	11	s6-1	□-200  ×  2.92	600	200	80	100	2749	2682	0.887	0.865	1.113	1.099	2407	0.876
	12	s6-2	□-200  ×  2.92	600	200	80	100	2615		0.844		1.086		2407	0.920
	13	sh4-1	□-200  ×  2.92	600	300	80		786	773	0.254	0.249	1.094	1.083	—
	14	sh4-2	□-200  ×  2.92	600	300	80		759		0.245		1.071
	Mean														0.941
	Standard deviation														0.089
Circular	15	c1-1	○-200  ×  2.92	600				2721	2713	1.003	1.000	2.413	2.632	2573	0.946
	16	c1-2	○-200  ×  2.92	600				2705		0.997		2.851		2573	0.951
	17	c2-1	○-200  ×  2.92	600	100	80	50	2452	2433	0.904	0.897	2.046	2.028	2201	0.898
	18	c2-2	○-200  ×  2.92	600	100	80	50	2413		0.889		2.011		2201	0.912
	19	c3-1	○-200  ×  2.92	600	200	80	50	2354	2332	0.868	0.860	1.984	1.910	2201	0.935
	20	c3-2	○-200  ×  2.92	600	200	80	50	2310		0.851		1.836		2201	0.953
	21	c4-1	○-200  ×  2.92	600	300	80	50	2230	2255	0.822	0.831	1.726	1.773	2201	0.987
	22	c4-2	○-200  ×  2.92	600	300	80	50	2280		0.840		1.819		2201	0.965
	23	c5-1	○-200  ×  2.92	600	200	160	50	1849	1843	0.682	0.679	1.593	1.660	1749	0.946
	24	c5-2	○-200  ×  2.92	600	200	160	50	1836		0.677		1.727		1749	0.953
	25	c6-1	○-200  ×  2.92	600	200	80	100	2043	2105	0.753	0.776	1.634	1.597	1941	0.950
	26	c6-2	○-200  ×  2.92	600	200	80	100	2166		0.798		1.560		1941	0.896
	27	ch4-1	○-200  ×  2.92	600	300	80		826	837	0.304	0.308	1.666	1.689
	28	ch4-2	○-200  ×  2.92	600	300	80		847		0.312		1.711
	Mean														0.937
	Standard deviation														0.143