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

Table 9

Mechanical parameters under 5 mm deflection of the friction plate.

Spring	Load times	Energy dissipation Wd (J)	Secant stiffness Ks (kN/mm)	Equivalent damping ratio (%) ξeq
Tension spring S1	1st cycle	308.251	0.219	13.967
	30th cycle	290.152	0.211	13.535
Tension spring S2	1st cycle	385.733	0.336	12.358
	30th cycle	360.266	0.332	11.761