Nonlinear Regression Based Health Monitoring of Hysteretic Structures under Seismic Excitation

Table 3

Estimated structural performance parameters from multiphase linear regression analysis.

Half cycle #	Bilinear factor	Yield displacement (mm)	Plastic displacement (mm)
31	0.062	46.7	−64.4
32	0.061	47.3	+104.7
Mean	0.062	47.0	—
Mean error	4.6%	1.1%	—
True values	0.065	46.5	—