D-Shaped Concrete-Filled Steel Tube Structure in Bridge Engineering

Table 1

Values of different parameters.

Parameter	Steel yield strength (MPa)	Concrete compressive strength	Tube wall width-to-thickness ratio (B/t)	Sectional leg width-to-thickness ratio	Slenderness ratio	Section form
Value	235	C30	30	(B/bl)	0–150	L200 series
	345	C40	37.5	2		L250 series
	390	C60	50	2.5		L300 series