Study on the Technical Status of Old Concrete Truss-Arch Bridge Based on Vehicle-Bridge Interaction

Table 6

Bridge properties.

Properties	Size (m)	Moment of inertia (cm^4)
Horizontal linkages beam	0.14×0.55 (rectangle)	1.941 × 10^5
Truss beam	0.27×0.25 (rectangle)	3.516 × 10^4
Damping constant	0.02
Fundamental frequency (model, Hz)	First mode (bending)	4.791
	Second mode (torsion)	6.173