Damage Detection Technique for Cold-Formed Steel Beam Structure Based on NSGA-II

Table 5

Assumed and identified rotational stiffness for multiple damage case.

	Rotational stiffness at right end of element 1	Rotational stiffness at left end of element 2	Rotational stiffness at right end of element 5	Rotational stiffness at left end of element 6
Assumed values (kN⋅m/rad)	147.60	147.60	147.60	147.60
Identified values (kN⋅m/rad)	165.41	165.41	151.35	146.66
Error (%)	10.16	−12.06	−2.54	0.63