A Study on Instantaneous Time-Frequency Methods for Damage Detection of Nonlinear Moment-Resisting Frames

Table 6

Dispersion of intensity level for different damage measures.

𝑥-direction						𝑦-direction
DM	0.2	0.4	0.6	0.8	1.0	0.2	0.4	0.6	0.8	1.0
Frequency	0.56	0.61	0.64	0.45	0.45	0.57	0.66	0.55	0.52	0.52
Amplitude	0.36	0.35	0.37	0.37	0.37	0.36	0.34	0.33	0.30	0.30
Energy	0.36	0.38	0.38	0.38	0.38	0.30	0.30	0.31	0.30	0.30