Investigation on Effect of Reflective Coating on Temperature Field of CRTS Ⅱ Slab Ballastless Track under Sunlight

The internal temperature variation of ballastless track is very complicated under the effect a sunlit environment, and there are serious transverse vertical gradients, which will cause cracking deformation structure. In this paper, an ANSYS analysis model for track, considering box girder structure, established based on environmental information bridge characteristics structural system. considers influence solar radiation intensity, wind speed, air temperature, geographical location, orientation, material parameters, other factors boundary conditions, can meet needs daylight response calculation any complex On basis, applicability reflective coating cooling studied. results showed that calculated finite element agree well with measured results. Under high-temperature conditions in summer, sunlight ambient mainly have significant effects gradient slab, maximum reaches 74.48 °C/m. significantly reduce slab’s gradient, reduction 34%. slab be reduced by up to 54% further application side coating. This study promote coatings high-speed railway structures.