Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge

Table 7

Natural frequencies and mode shapes derived from impact loading.

Mode	Natural frequency			MAC values
	Eigenvalue (Hz)	Impact (Hz)	Error (%)
1	2.480	2.472	0.32	0.9957
2	4.024	4.006	0.45	0.9902
3	5.695	5.609	1.51	0.6270