Cyclic Testing of Concrete-Filled Double-Skin Steel Tubular Column to Steel Beam Joint with RC Slab

Table 5

Ductility coefficients and energy dissipation of the specimens.

Specimen	(mm)	(mm)	θy (rad)	θu (rad)			E
SBJ1 (+)	28.50	60	0.0144	0.0304	2.11	0.302	1.895
SBJ1 (−)	28.44	60	0.0144	0.0304	2.11
CBJ1 (+)	28.96	62	0.0147	0.0314	2.14	0.284	1.782
CBJ1 (−)	27.05	57.5	0.0137	0.0291	2.13
CBJ2 (+)	32.09	66	0.0163	0.0334	2.06	0.282	1.772
CBJ2 (−)	30.80	61.5	0.0156	0.0311	2.00
CBJ3 (+)	18.69	53	0.0095	0.0268	2.83	0.311	1.957
CBJ3 (−)	19.37	56	0.0098	0.0284	2.89
CBJ4 (+)	30.26	66	0.0153	0.0334	2.18	0.311	1.954
CBJ4 (−)	30.99	64	0.0157	0.0324	2.07