Application of Semi-analytical Method in Transient Thermal Field of Pavement Structures

Abstract:

The daily temperature change of a pavement structure has an important impact on its crack production and propagation. First of all, a one-dimensional transient mathematical model of heat conduction and a heat convection boundary condition that can take solar radiation and ground radiation into account were established according to the characters of the pavement structure and heat conduction. Secondly all the computational formulae were deduced for the above model utilizing SAM. Finally, the hourly temperature field of a typical pavement structure was calculated using ANSYS and SAM respectively. Results show that SAM solutions at different depths are in good line with ANSYS solutions. Therefore, SAM is an easy-programmed, fast and high precise method, and is deserve to be popular. In addition, the daily temperature changes at different depths were discussed, and some suggestions were provided for the thermal crack control and prevention of the structure

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 1289-1294
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.1289
• Online since: September 2011
• Authors: Fu Liang Mei, Gui Ling Li
• Keywords: Pavement Engineering, Pavement Structure, Semi-Analytical Method (SAM), Thermal Field

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