Finite Element Model Updating in Bridge Structures Using Kriging Model and Latin Hypercube Sampling Method

Table 2

Comparison of testing results and FE model results (unit: Hz).

Measured frequency	FEM frequency	Error (%)	Position	Modal description
0.5911	0.4894	17.21	Arch rib	1st order symmetrical lateral bending
1.1804	1.0322	12.56		2nd order antisymmetrical lateral bending
1.8387	1.6145	12.19		3rd order symmetrical lateral bending
2.5883	2.3091	10.79		4th order antisymmetrical lateral bending
3.4136	2.9343	14.04		5th order symmetrical lateral bending
4.3012	3.8008	11.63		6th order antisymmetrical lateral bending
5.1021	4.5375	11.07		7th order symmetrical lateral bending
2.0143	2.0799	−3.26	Girder and arch rib	1st order antisymmetrical vertical bending
2.9367	3.0691	−4.51		2nd order symmetrical vertical bending
3.2499	3.5905	−10.48		3rd order symmetrical vertical bending
3.8289	4.2221	−10.27		4th order antisymmetrical vertical bending
4.7944	4.4713	6.74		5th order symmetrical vertical bending
4.9524	5.0990	−2.96		6th order antisymmetrical vertical bending
3.9760	3.2979	17.05	Girder	1st order antisymmetrical lateral bending
4.6262	5.2794	−14.12		2nd order symmetrical lateral bending
4.4507	4.6486	−4.45	Arch rib	1st order torsional
5.4851	5.5923	−1.95		2nd order torsional