Compression Performance of Newly Designed Replaceable Tubular Steel Piers

Table 3

Summary results of axially compressed specimens.

Specimen label	Nominal yield point		Peak point		Extreme point	Py/Pmax	Ductility
	δy (mm)	Py (kN)	δmax (mm)	Pmax (kN)	δu (mm)	ax	μ = δu/δy
I-0	2.02	3250	5.69	3451	11.40	0.94	5.6
I-A	2.53	3250	6.68	3670	11.08	0.89	4.4
II-A-1	1.84	2920	6.16	3284	10.74	0.89	5.8
II-A-2	2.16	3071	6.44	3463	12.42	0.89	5.8
II-A-3	1.89	2988	5.54	3359	11.31	0.89	6.0
III-A-1	2.39	3433	5.35	3840	10.84	0.89	4.5
III-A-2	2.02	3340	4.11	3760	8.24	0.89	4.1
III-B-1	2.50	2927	7.24	3251	14.26	0.90	5.7
III-B-2	3.38	2968	7.91	3302	14.97	0.90	4.4
III-C-1	2.63	2977	8.55	3274	16.0	0.91	6.1
III-C-2	1.75	2977	7.28	3199	20.07	0.93	11.5
IV-A-1	2.37	3697	4.73	4137	12.85	0.89	5.4
IV-A-2	2.21	3363	5.49	3849	12.81	0.87	5.8
IV-A-3	2.02	3340	7.07	3707	22.80	0.90	11.3