Study on Mechanical Properties of Concrete-Filled Steel Tubular Members under Axial Tension

Table 1

Specimen parameter.

Number	Diameter (mm)	Tube thickness (mm)	α	fcu·k (MPa)
1	89	3.5	0.178	40
2	114	3.5	0.135	40
3	139	3.5	0.109	40
4	114	3.5	0.135	30
5	114	3.5	0.135	50
6	114	3.5	—	—