Vibration-Based Damage Detection of a Steel-Concrete Composite Slab Using Non-Model-Based and Model-Based Methods

Table 7

Comparison of the identified and tested modal parameters in Case 1 and Case 2.

	Case 1				Case 2
Mode	Exp. Freq. (Hz)	Updated Freq. (Hz)	Diff. (%)	MAC	Exp. Freq. (Hz)	Updated Freq. (Hz)	Diff. (%)	MAC
1^st	18.27	16.04	12.21	0.89	—	—	—	—
2^nd	23.91	22.42	6.23	0.96	24.70	23.70	4.05	0.97
3^rd	30.76	29.61	3.74	0.86	31.71	31.13	1.83	0.83
6^th	84.43	73.47	−12.98	0.60	73.93	76.01	2.81	0.89

Note. , f_e1 is the experimental frequency in Case 1 or Case 2, and f_u1 is the frequency of the updating model in Case 1 or Case 2.