Experimental and Numerical Investigation on Dynamic Properties and Human-Induced Vibrations of an Asymmetric Steel-Plated Stress-Ribbon Footbridge

Table 4

Dynamic characteristics of the bridge.

Modal no.	Frequency (Hz)		Modal description
	Simulated	Measured
1	0.95	0.95	1^st vertical bending (main span)
2	0.97	—	1^st lateral bending + torsion (main span)
3	1.09	—	2^nd vertical bending (main span)
4	1.65	1.45	3^rd vertical bending (main span) + 1^st vertical bending (side span) + lateral (column)
5	1.71	1.68	3^rd vertical bending (main span) + 1^st vertical bending (side span)
6	2.20	—	1^st torsion (main span)
7	2.27	—	4^th vertical bending (main span)
8	2.89	—	5^th vertical bending (main span)
9	3.15	—	2^nd lateral bending + torsion (main span)
10	3.47	—	6^th vertical bending (main span)