An Efficient Model for Train-Track-Bridge-Coupled System under Seismic Excitation

Table 2

Properties of TB system.

Notation	Item	Value
Er	Young’s modulus of rail	2.06 × 10^11 N/m^2
Ir	Mass moment of inertia of rail cross section	2 × 3.22 × 10^−5 m^4
	Mass per unit length of rail	2 × 59.66 kg/m
Es	Young’s modulus of slab	3.6 × 10^10 N/m^2
	Poisson’s ratio of slab	0.2
Is	Mass moment of inertia of slab cross section	1.6 × 10^−3 m^4
	Mass per unit length of slab	1.2 × 10^3 kg/m
krs	Spring stiffness of fastener	2 × 5.0 × 10^7 N/m
crs	Damping coefficient of fastener	2 × 3.625 × 10^4 N·s/m
	Spring stiffness of CA layer per unit length	1.5 × 10^9 N/m^2
	Damping coefficient of CA layer per unit length	8.3 × 10^4 N·s/m^2
Eb	Young’s modulus of girder	3.45 × 10^10 N/m^2