Embedded Electromechanical Impedance and Strain Sensors for Health Monitoring of a Concrete Bridge

Table 4

Comparisons for natural frequencies between finite element method and the field tests.

Direction	Span	Experiment	FEM
			ANSYS	MIDAS
Vertical	S006-S007	1.91	1.92	1.72
	S007-S008	1.91	1.92	1.72
Longitudinal	S006-S007	0.93	0.87	0.85
	S007-S008	0.88	0.87	0.85