Field Test and Numerical Analysis of In-Service Railway Bridge

Table 2

Ballast modelling parameters.

Parameter	Value
With rail cushion stiffness (N/m)	1.0 × 10^8
With rail cushion damping ratio (N·s/m)	7.5 × 10^4
Ballast bed density (kg/m^3)	1.8 × 10^3
Ballast bed modulus (Pa)	1.1 × 10^8
Ballast bed damping coefficient (N·s/m)	5.88 × 10^4
Ballast bed shear damping (N·s/m)	8.0 × 10^4
Ballast bed thickness (m)	0.45
Roadbed modulus (Pa)	9.0 × 10^7
Roadbed damping coefficient (N·s/m)	3.115 × 10^4