Usually, the combined response of track and structure is analysed by standard finite element analysis software. Generally, such effects occur in continuously welded rails, which are currently being used in high speed railway tracks because of their superior maintainability and passenger comfort. The rail stress may even be high enough to cause its rupture. These studies refer to the stresses and deformations in the rail-deck system, which may reach unsafe values and can affect the serviceability of the track. Since the 1980s, the track-structure interaction in railway bridges has been the subject of research, especially since the beginning of the high speed railway traffic in Europe. A comparison with ABAQUS calculations shows a very good result correlation and compliance with the standard’s specifications. This method can be implemented in any programming language or analysis software. For its solution, an iterative optimisation algorithm is used. It is based on the calculation of deformation states in single DOF element models that satisfy the boundary conditions. The authors developed an alternative analysis method, which they call the relative displacement method. The track-structure interaction effects are usually analysed with conventional FEM programs, where it is difficult to implement the complex track-structure connection behaviour, which is nonlinear, elastic-plastic and depends on the vertical load.
0 kommentar(er)
