Study on Mechanical Behavior of Fully Encased Composite Slender Columns with High-Strength Concrete Using FEM Simulation

Table 11

Effect of structural steel shape on the axial load capacity of FEC column with s = 50 mm.

Group	Column ID	Structural steel	Concrete fck, (MPa)	S (mm)	Peak axial load (P)	Percent difference (%)
Group 1	Control RHC1	—	90	50	7734.38	—
	HC1CS	Circular	90		8620.64	11.46
	HC1IS	I-shaped	90		8315.56	7.51
	HC1RS	Rectangular	90		7956.81	2.88
Group 2	Control RHC2	—	100	50	8148.87	—
	HC2CS	Circular	100		9086.14	11.50
	HC2IS	I-shaped	100		9024.55	10.75
	HC2RS	Rectangular	100		8406.18	3.16
Group 3	Control RHC3	—	120	50	9164.90	—
	HC3CS	Circular	120		10104.70	10.25
	HC3IS	I-shaped	120		9998.76	9.10
	HC3RS	Rectangular	120		9495.37	3.61