Restoring Force Model of an Energy-Dissipation Joint in Hybrid Frames: Simplified Skeleton Curve and Hysteretic Rules

Table 9

Parameters optimized by the GA.

Parameters	x 1	y 1	x 2	y 2	x 3	y 3	x 4	y 4
Optimized value	0.0035	23.5089	0.0028	−26.6329	−0.0032	21.513	−0.0032	−26.6855
Upper bound	0.004	25	0.004	−23	−0.002	25	−0.003	−23
Lower bound	0.003	21	0.002	−29	−0.004	21	−0.004	−29