Experimental Study on Ultrahigh Strength Concrete Filled Steel Tube Short Columns under Axial Load

Table 5

Comparisons between calculated ultimate strengths and test results.

Group	Specimen		/%	/MPa		/kN	Nominal capacity		Unified strength theory		Limit analysis theory
							/kN	/	/kN	/	/kN	/
S1	S1-1	30.2	14.67%	349	0.608	2205	1496	1.474	1878	1.174	2062	1.069
	S1-2	30.2	14.67%	349	0.608	2245	1496	1.501	1878	1.195	2062	1.089
	S1-3	30.2	14.67%	349	0.608	2254	1496	1.507	1878	1.200	2062	1.093
S2	S2-1	22.9	20.02%	427	1.015	3112	1965	1.584	2546	1.222	2955	1.053
	S2-2	22.9	20.02%	427	1.015	3187	1965	1.622	2546	1.252	2955	1.079
	S2-3	22.9	20.02%	427	1.015	3193	1965	1.625	2546	1.254	2955	1.081
S3	S3-1	20.9	21.98%	352	0.919	5988	4288	1.396	5663	1.057	6342	0.944
	S3-2	20.9	21.98%	352	0.919	5906	4288	1.377	5663	1.043	6342	0.931
	S3-3	20.9	21.98%	352	0.919	6010	4288	1.402	5663	1.061	6342	0.948