Optimal Evaluation of the Rheological Parameters for STF Dampers in Semi-Rigid Joints of Steel Structures Using Response Surface Method

Table 6

Point prediction of the response factors.

Response output	Predicted mean	Predicted median	Std dev	SE mean	95% CI low for mean	95% CI high for mean	95% TI low for 99% pop	95% TI high for 99% pop
Complex viscosity	98.6919	98.6919	22.7266	7.71753	82.9078	114.476	10.6652	186.719
Cd (damping constant)	446.995	446.995	245.544	83.3824	276.459	617.531	−504.07	1398.06
Effective stiffness	449.89	449.89	80.2473	27.2505	394.157	505.624	139.069	760.712