Prediction of Wind Velocity to Raise Vortex-Induced Vibration through a Road-Rail Bridge with Truss-Shaped Girder

Table 2

Frequency parameters.

Experimental cases	Vertical frequency (Hz)	Torsional frequency (Hz)	Frequency ratio (torsional/vertical)
1	1.12	1.238	1.1
2		1.463	1.3
3		1.788	1.6
4		2.244	2.0
5	1.50	1.656	1.1
6		1.956	1.3
7		2.406	1.6
8		3.013	2.0
9	1.89	2.100	1.1
10		2.444	1.3
11		3.006	1.6
12		3.788	2.0