Damage Localization of Cable-Supported Bridges Using Modal Frequency Data and Probabilistic Neural Network

Table 1

Comparison between computed and measured modal frequencies of Tsing Ma Bridge (TMB).

Mode type and order	Computed (Hz)	Measured (Hz)	Difference (%)
Predominantly lateral mode
1st	0.0686	0.070	−2.00
2nd	0.1611	0.170	−5.24
3rd	0.2546	0.254	0.24
4th	0.2820	0.301	−6.34
Predominantly vertical mode
1st	0.1154	0.114	1.23
2nd	0.1420	0.133	6.75
3rd	0.1836	0.187	−1.82
4th	0.2350	0.249	−5.62
Predominantly torsional mode
1st	0.2584	0.270	−4.30
2nd	0.3014	0.324	−6.97
3rd	0.4942	0.486	1.69
4th	0.5660	0.587	−3.58