Behavior of Concrete-Filled Steel Tube Columns Subjected to Axial Compression

Table 5

List of columns for CFST columns with foundation.

Specimens	D (mm)	h (mm)	n (n = h/D)	Steel tube (mm)
Z1P1	100	300	3	1
Z1P2	100	300	3	0
Z2P1	100	400	4	1
Z2P2	100	400	4	0
Z3P1	100	500	5	1
Z3P2	100	500	5	0

Notation: Z1: rock-socketed depth is 300 mm; Z2: rock-socketed depth is 400 mm; Z3: rock-socketed depth is 500 mm; P1: steel tube is 1 mm; P2: steel tube is 0 mm; : rock-socketed depth; : ratio of rock-socketed depth, n = h/D.