Low-Cyclic Loading Tests of Self-Centering Variable Friction (SCVF) Brace

Table 5

Performance parameters under various deformation amplitude (SCVF brace with spring S1).

Deflection of the friction plate ω (mm)	Deformation amplitude δmax (mm)	Energy dissipation Wd (J)	Secant stiffness Ks (kN/mm)	Equivalent damping ratio (%) ξeq
5	20	132.216	0.351	15.348
	40	311.712	0.209	14.474
	60	565.674	0.178	13.659
7.5	20	206.145	0.453	18.127
	40	505.497	0.250	18.186
	60	877.523	0.197	18.435