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

Author

Listed:
  • Xiankai Quan

    (School of Civil Engineering, Central South University, Changsha 410075, China)

  • Wenhua Guo

    (School of Civil Engineering, Central South University, Changsha 410075, China)

  • Jun Tian

    (School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China)

  • Weiguo Zhang

    (School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China)

Abstract

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

Suggested Citation

  • Xiankai Quan & Wenhua Guo & Jun Tian & Weiguo Zhang, 2023. "Investigation on Effect of Reflective Coating on Temperature Field of CRTS Ⅱ Slab Ballastless Track under Sunlight," Sustainability, MDPI, vol. 15(2), pages 1-19, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:2:p:915-:d:1024813
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    References listed on IDEAS

    as
    1. Bin Yan & Ruiqi Cheng & Haoran Xie & Xiangmin Zhang, 2022. "Vertical Nonlinear Temperature Gradient and Temperature Load Mode of Ballastless Track in China," Mathematics, MDPI, vol. 10(1), pages 1-15, January.
    2. Hae-Chang Cho & Sun-Jin Han & Inwook Heo & Hyun Kang & Won-Hee Kang & Kang Su Kim, 2020. "Heating Temperature Prediction of Concrete Structure Damaged by Fire Using a Bayesian Approach," Sustainability, MDPI, vol. 12(10), pages 1-17, May.
    3. J. Riley Edwards & Kirill A. Mechitov & Ian Germoglio Barbosa & Arthur de O. Lima & Billie F. Spencer & Erol Tutumluer & Marcus S. Dersch, 2021. "A Roadmap for Sustainable Smart Track—Wireless Continuous Monitoring of Railway Track Condition," Sustainability, MDPI, vol. 13(13), pages 1-16, July.
    4. Sana Ullah & Rita Branquinho & Tiago Mateus & Rodrigo Martins & Elvira Fortunato & Tahir Rasheed & Farooq Sher, 2020. "Solution Combustion Synthesis of Transparent Conducting Thin Films for Sustainable Photovoltaic Applications," Sustainability, MDPI, vol. 12(24), pages 1-15, December.
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