Comfort Evaluation of Double-Sided Catwalk for Suspension Bridge due to Wind-Induced Vibration

Table 1

Modal frequencies and shapes.

Mode number	Characteristics of modal shapes	Modal frequency (Hz)
1	1st symmetric lateral bending	0.06629
2	1st antisymmetric vertical bending	0.12705
3	1st antisymmetric vertical bending + 1st antisymmetric torsion	0.13171
4	1st antisymmetric vertical bending + 1st symmetric torsion	0.13435
5	1st right span antisymmetric vertical bending	0.16159
6	1st symmetric vertical bending	0.18639
7	1st lateral bending of left side span	0.18682
8	1st antisymmetric torsion	0.19459
9	1st symmetric torsion	0.19763
10	2nd antisymmetric torsion	0.21966