Static and Dynamic Mechanical Properties of Long-Span Cable-Stayed Bridges Using CFRP Cables

Table 7

Dynamic characteristics of CFRP cable-stayed bridge with different numbers of auxiliary piers.

No auxiliary pier		1 auxiliary pier		2 auxiliary piers		3 auxiliary piers		Modal characteristics
Order	Frequency (Hz)	Order	Frequency (Hz)	Order	Frequency (Hz)	Order	Frequency (Hz)
1	0.1023	1	0.1067	1	0.1067	1	0.1076	Longitudinal floating + vertical bending of pylon
2	0.1121	2	0.1286	2	0.1292	2	0.1351	First lateral bending
3	0.1151	3	0.1673	3	0.2046	3	0.2094	First vertical bending
7	0.3578	7	0.3762					Second vertical bending + side-span first vertical bending
9	0.4243							Side-span synchrony first lateral bending
12	0.4639							Side-span reverse first lateral bending
18	0.5628	15	0.5625	13	0.5625	13	0.5632	First torsion + lateral bending
21	0.5956	17	0.5946	15	0.5949	15	0.5980	First torsion