Performance Evaluation of Q690 High-Strength Concrete-Filled Thin-Walled Steel Tubular Columns under Compression-Bending Coupling

Table 1

Summary of test specimens.

Number	Specimen	D; (mm)	t; (mm)	(MPa)	D/t; ratio	(MPa)	n	Axial load P; (kN)
1	HCFTST-1-1-1	140	2	722.64	70	43.5	0.1	104.68
2	HCFTST-1-2-2	140	2	722.64	70	49.1	0.2	221.80
3	HCFTST-1-3-3	140	2	722.64	70	78.6	0.3	431.00
4	HCFTST-1-4-4	140	2	722.64	70	97.6	0.4	659.09
5	HCFTST-2-1-2	180	2	722.64	90	43.5	0.2	307.24
6	HCFTST-2-2-1	180	2	722.64	90	49.1	0.1	164.04
7	HCFTST-2-3-4	180	2	722.64	90	78.6	0.4	875.65
8	HCFTST-2-4-3	180	2	722.64	90	97.6	0.3	762.77
9	HCFTST-3-1-3	220	2	722.64	110	43.5	0.3	632.75
10	HCFTST-3-2-4	220	2	722.64	110	49.1	0.4	906.43
11	HCFTST-3-3-1	220	2	722.64	110	78.6	0.1	309.26
12	HCFTST-3-4-2	220	2	722.64	110	97.6	0.2	725.00
13	HCFTST-4-1-4	260	2	722.64	130	43.5	0.4	1106.30
14	HCFTST-4-2-3	260	2	722.64	130	49.1	0.3	895.84
15	HCFTST-4-3-2	260	2	722.64	130	78.6	0.2	829.43
16	HCFTST-4-4-1	260	2	722.64	130	97.6	0.1	489.49

Note. The notation is , where indicates D/t ratio number, represents concrete strength () number, and stands for axial compression ratio (n) number.