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

Figure 9

(a) Perturbation for effective stiffness. (b) Contour graph for effective stiffness. (c) Predicted vs. actual values for effective stiffness. (d) 3D graph for effective stiffness.

(a)

(b)

(c)

(d)