Exact Dynamic Characteristic Analysis of Steel-Concrete Composite Continuous Beams

Table 3

A comparison of the fundamental frequencies for Case 2 and Case 3.

K (MPa)	Fundamental frequencies ()
	Case 2 ()			Case 3 ()
	ANSYS FEA	Present method	Relative errors	ANSYS FEA	Present method	Relative errors
Infinite	11.38	11.48	0.88	10.82	10.92	0.92
150	10.69	10.77	0.75	10.15	10.23	0.79
100	10.42	10.5	0.77	9.88	9.96	0.81
50	9.75	9.8	0.51	9.23	9.28	0.54
30	9.12	9.16	0.44	8.63	8.67	0.46
20	8.57	8.6	0.35	8.11	8.14	0.37
10	7.66	7.67	0.13	7.26	7.27	0.14
5	6.92	6.91	−0.14	6.56	6.55	−0.15