Fig 1.
Cross-section of double-line ballasted railway with concrete box subgrade.
Fig 2.
Longitudinal elevation of concrete box subgrade.
Table 1.
Fig 3.
Three-dimensional finite element model.
Fig 4.
Main modelling procedure.
Fig 5.
Comparison of vertical dynamic stresses in subgrade [39].
Fig 6.
Comparison of lateral dynamic displacements in subgrade.
Table 2.
Comparison of vertical acceleration in subgrade.
Fig 7.
Dynamic stress distribution and attenuation curves with depth at the subgrade centerline.
Fig 8.
Transverse distribution of dynamic displacement along the subgrade surface.
Fig 9.
Acceleration distribution curves with depth at the subgrade centerline.
Fig 10.
Transverse distribution of dynamic stress on the roof’s top.
Fig 11.
Transverse distribution of dynamic stress on the roof’s bottom.
Fig 12.
Transverse distribution of dynamic stress on the floor’s top.
Fig 13.
Transverse distribution of dynamic stress on the floor’s bottom.
Fig 14.
Dynamic stress distribution curves along the depth at the centers of various vertical webs.
Fig 15.
Dynamic stress distribution curves along the depth at the locations of various rail tracks.
Fig 16.
Transverse distribution of dynamic displacement on the roof’s top of the concrete box subgrade under the three operational conditions.
Fig 17.
Dynamic displacement profiles along the top and bottom of the roof.
Fig 18.
Dynamic displacement profiles along the top and bottom of the floor.
Fig 19.
Dynamic displacement distribution curves along the depth at the centers of various vertical webs.
Fig 20.
Dynamic displacement distribution curves along the depth at the locations of various rail tracks.
Fig 21.
Peak acceleration curves at various measurement points on the roof surface under the three operational conditions.
Fig 22.
Variation distribution of peak acceleration across different structural layers of the concrete box subgrade.
Fig 23.
Depthwise acceleration distribution at the centers of different vertical webs.
Fig 24.
Acceleration distribution curves along the depth at the locations of various rail tracks.