Cumulative Ductility and Hysteretic Behavior of Small Buckling-Restrained Braces

Table 3

Hysteretic energy and cumulative ductility factor (η) of SBRBs.

Specimen; ()	Hysteretic energy; kN-mm (×10^3)			First yield force; kN; ()	First yield deformation; mm; ()	Cumulative ductility factor; η; ()
	Bilinear; ()	Menegotto-Pinto; ()	Experiment; ()
SBRB-1	28.53	23.60	24.59	89.67	0.61	450
SBRB-2	19.51	15.47	14.08	65.66	0.92	233
SBRB-3	18.67	14.81	18.72	66.67	1.11	253
SBRB-4	23.67	20.19	27.52	90.90	1.52	199