Experimental Research on Span Direction Effect of Vortex-Induced Vibration of Bridge Main Girder Based on Symmetric Algorithm

Table 5

Comparison of the estimated and experimental values of the first-order vertical bending vortex amplitude.

Measuring point	Normalized coordinates	Normalized mode shape function	Test	Convert	Relatively error
	x/l		Dimensionless vertical amplitude	Dimensionless vertical amplitude
1/8	0.021	0.251	0.02415	0.01542	−5.65%
1/2	1.120	0.320	0.01253	—	—
1/6	0.524	0.452	0.12032	0.04512	0.35%
1/4	0.588	0.620	0.21530	0.12532	2.21%