Research Article
Effect of Bridge-Pier Differential Settlement on the Dynamic Response of a High-Speed Railway Train-Track-Bridge System
Table 1
Parameters of FEM model and the proposed model.
| | Structure | Parameter (unit) | Value | | FEM model | The proposed model |
| | Steel rail | Elastic modulus (N/m2) | 2.1059 × 1011 | | Inertia moment (m4) | 3.1217 × 10−5 | | Linear density (kg/m) | 60.64 |
| | Fastener | Stiffness (N/m) | 6.0 × 107 | | Damping (kN s/m) | — | 75 |
| | Track slab | Width (m) | 2.4 | | Thickness (m) | 0.19 | | Elastic modulus (N/m2) | 3.5 × 1010 | | Poisson’s ratio | 0.2 | — | | Density (kg/m3) | 2500 |
| | CA mortar | Stiffness (N/m) | — | 1.25 × 109 | | Damping (kN s/m) | — | 34.58 | | Elastic Modulus (N/m2) | 200 × 106 | — | | Poisson’s ratio | 0.31 | — | | Density (kg/m3) | 1800 | — |
| | Concrete base | Width (m) | 2.88 | | Thickness (m) | 0.25 | | Elastic modulus (N/m2) | 3.0 × 1010 | | Poisson’s ratio | 0.2 | — | | Density (kg/m3) | 2500 |
| | Bridge beam | Elastic Modulus (N/m2) | 3.55 × 1010 | | Poisson’s ratio | 0.2 | — | | Density (kg/m3) | 2500 |
| | Bridge bearing | Stiffness (N/m) | 7.5 × 108 | | Damping (kN s/m) | — | 7.5 × 104 |
|
|
