Spatial Finite Element Analysis for Dynamic Response of Curved Thin-Walled Box Girder Bridges

Table 1

Comparison of the frequencies and modes.

Mode number	BEAM188/Hz	The present element/Hz	Error/%	The mode that predominates in dynamic response
1	9.372	9.7099		The first-order mode of vertical bending
2	18.936	18.044		The first-order mode of lateral bending
3	21.717	20.387		The first-order mode of torsion
4	22.177	23.458		The second-order mode of vertical bending
5	37.845	37.803		The second-order mode of torsion
6	40.317	40.458		The second-order mode of lateral bending
7	45.197	41.897		The third-order mode of vertical bending
8	54.686	54.630		The first-order mode of axial deformation