Influences of Rail Creep on the Longitudinal Forces and Displacements of Welded Turnout

Moving wheel loads will cause creep and additional temperature stress in continuously welded rails (CWR). The difference in the structure of frog and frog heel will result in different transmission mechanism of the longitudinal forces in welded turnouts. Therefore, the welded turnouts with different structures have different mechanical properties and deformations. In this paper, a comparative analysis is made of the influences of the transmission mechanisms of longitudinal force of welded turnouts with different structures on the loads and deformations of various components. The analysis results show that raising track resistance and controlling the creeping displacement of the welded turnouts are beneficial to enlargement of the temperature scope for laying welded turnouts.