Development of a Multilayer Analysis Model for Tie/Ballast Track Structures


A multilayer analysis model for tie/ballast track structures has been developed. The model includes the effects of rail bending, rail fastener stiffness, tie bending, variable ballast and subgrade material type, and variable tie spacing and ballast depth. Predicted results from the model are compared with experimental results and excellent agreement is shown. The model offers the advantages of simplicity of use and reduced computer run time compared with current finite element codes.