Optimisation of Longitudinal Seismic Energy Dissipation System for Straddle-type Monorail-Cum-Road Long-Span Cable-Stayed Bridge

Table 2

Niutianyang Bridge dynamic characteristics.

Mode	ANSYS-FEM frequency (Hz)	MIDAS CIVIL-FEM frequency (Hz)	Mode shape description
1	0.101	0.101	Main beam longitudinal drift
2	0.216	0.215	Main beam lateral bending
3	0.329	0.328	Main beam lateral bending
4	0.337	0.336	Main beam vertical bending
5	0.350	0.349	Main tower longitudinal bending
6	0.572	0.570	Main beam vertical bending
7	0.612	0.610	Main tower lateral bending
8	0.629	0.627	Main tower lateral bending