Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform

Table 2

Variations of damage index with damage severity.

Damage severity	1%	2%	5%	10%	20%	40%
DI (seismic excitation)	2.625	5.223	13.017	26.004	51.960	103.814
DI (sinusoidal excitation)	5.172	10.344	25.857	51.704	103.369	206.579
DI (impulse excitation)	1.256	2.519	6.309	12.623	25.244	50.457