Control Parametric Analysis on Improving Park Restoring Force Model and Damage Evaluation of High-Strength Structure

Table 8

Influence of the five control parameters of the modified Park restoring force model on structural responses.

Control parameter	Shear value (kN)	Moment ratio	Displacement (mm)	Acceleration (mm/s^2)	Total energy dissipation (kN⋅m)	Total damage value
Stiffness degradation parameter	★★	★★	★	★	★★	★
Slip or fracture closure parameter	★	★	★★	★★	★	★
Energy degradation parameter	★★★	★★★	★★★	★★★	★★★	★★★
Energy-based strength degradation parameter	★★★	★★★	★★★	★★★	★★★	★★★
Ductility-based strength degradation parameter	★★	★	★	★★	★★★	☆

Note: “★★★”: relatively significant influence; “★★”: moderate influence; “★”: relatively insignificant influence; “☆”: no or little influence.