Numerical Analysis of Two I-shaped GFRP Composite Bridge with Corrugated Webs

Table 7

Natural vibration frequencies with the width changes.

Mode no.	Shape	Frequencies (Hz)
		Width
		10 mm	15 mm	20 mm	25 mm	30 mm
1	Flexure	7.43	7.24	7.09	6.999	6.919
2	Torsion	14.03	13.93	13.82	13.73	13.67
3	Flexure	26.23	25.66	25.21	24.88	24.64
4	Torsion	34.86	34.73	34.42	34.18	33.99