Seismic Behavior of Elliptical Concrete-Filled Steel Tubular Columns under Combined Axial Compression and Cyclic Lateral Loading

Table 4

Load bearing capacity and ductility of test specimens.

Specimens		Pu (kN)	(mm)	Py (kN)	(mm)	μ
E1.0-C45-0.2	Positive direction	119.35	^a>48.05	103.02	14.78	>3.27
	Negative direction	126.49	^a>48.06	107.02	18.88	>2.55
	Average	122.92	^a>48.06	105.02	16.83	>2.91
E1.3-C45-0.2	Positive direction	108.43	80.30	94.17	17.47	>4.60
	Negative direction	115.05	69.00	99.65	18.15	3.81
	Average	111.74	74.65	96.91	17.81	4.21
E1.8-C45-0.2	Positive direction	89.03	75.72	75.95	12.37	6.14
	Negative direction	98.48	70.70	81.74	14.16	5.05
	Average	93.75	73.21	78.84	13.26	5.59
E2.3-C45-0.2	Positive direction	84.53	40.06	71.07	13.14	3.05
	Negative direction	77.35	40.08	67.73	11.59	3.46
	Average	80.94	40.07	69.40	12.37	3.26
E1.8-C60-0.2	Positive direction	94.22	53.66	80.44	12.35	4.38
	Negative direction	108.08	53.66	93.58	13.96	3.85
	Average	101.15	53.66	87.01	13.16	4.12
E1.8-C75-0.2	Positive direction	97.09	61.51	81.42	14.00	4.41
	Negative direction	89.78	76.72	72.22	13.87	5.61
	Average	93.44	69.11	76.82	13.93	5.01
E1.8-C100-0.2	Positive direction	99.32	45.88	84.14	13.18	3.48
	Negative direction	107.70	35.71	94.10	13.00	2.75
	Average	103.51	40.79	89.12	13.09	3.12
E1.8-C45-0.1	Positive direction	100.10	90.05	85.01	14.75	6.12
	Negative direction	102.10	90.01	86.94	14.77	6.11
	Average	101.10	90.03	85.97	14.76	6.11
E1.8-C45-0.3	Positive direction	86.70	48.01	74.22	12.27	3.92
	Negative direction	94.50	45.54	79.93	13.36	3.41
	Average	90.60	46.77	77.08	12.82	3.66
E1.8-C45-0.2m	Positive direction	47.58	78.14	45.97	25.00	3.13
	Negative direction	54.64	49.83	51.93	30.00	1.66
	Average	51.11	63.99	48.95	27.50	2.39
E1.8-C45-0.2l	Positive direction	32.00	99.78	28.82	40.19	2.48
	Negative direction	31.20	95.19	29.13	35.50	2.68
	Average	31.60	97.49	28.97	37.85	2.58
E1.8-C45-0.2b	Positive direction	54.70	56.68	48.00	22.57	2.51
	Negative direction	52.00	66.26	45.94	21.39	3.10
	Average	53.35	61.47	46.97	21.98	2.81
E1.8-C45-0.3b	Positive direction	48.50	44.35	47.08	21.00	2.11
	Negative direction	45.60	46.70	39.63	22.06	2.12
	Average	47.05	45.52	43.36	21.53	2.12

^aThe loading procedure of E1.0-C45-0.2 was not completed due to the abrupt failure of the instrument.