Temperature Features of CRTSII Slab Ballastless Track in Severe Cold Region

Damages, such as slab end warped, gaps of slab and bed, and cracks of track bed, of CRTSII Slab-Ballastless-Track (SBT) in high speed railway were studied for temperature changing significantly in severe cold regions. First, Contact-Thermal-Resistance (CTR) between Concrete-Asphalt (CA) mortars of the SBT and roadbed were defined. Then, the first, second and fourth types of heat transfer boundary conditions' subprograms of SBT changing with environment were programmed, and temperature fields of SBT under extreme weathers conditions in severe cold regions were received. Then, on couple thermal mechanical analysis platform of ABAQUS, the temperature fields are imported into mechanical model of SBT to obtain temperature stresses, slab end warped, and displacements, so that provide a reference for the design and application of CRTSII SBT in severe cold region.