Thermal stresses of asphalt pavement with temperature-dependent modulus of elasticity

• Autores: Y. Zhong, L. Geng
• Localización: Bearing capacity of roads, railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Champaign, Illinois, USA, June 29-July 2, 2009 / Erol Tutulumluer (dir.), Imad L. Al-Qadi (dir.), Vol. 1, 2009, ISBN 9780415804325, págs. 495-501
• Idioma: inglés
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• Resumen

  • This paper presents an analytical study of thermal stresses of asphalt pavement with temperature-dependent modulus of elasticity. In the analysis, the asphalt pavement is regarded as a multilayered elastic half space axisymmetrical system. First, thermoelastic theory is used to describe thermal stresses of multi-layered system, while the temperaturedependent modulus of elasticity is considered. Then, Laplace transformation and Hankel transformation with respect to time and radial, respectively, are utilized for thermo-elastic equations of equilibrium. Then, the transfer matrix method is applied to derive general solutions for multi-layered problem. Finally, the resulting formulation is applied to calculate thermal stresses in the low temperature cracking problem of asphalt pavement. Thermal stress is calculated and compared with the case that modulus of elasticity supposed to be constant, to show the remarkable impact of temperature-dependent modulus of elasticity on thermal stresses of asphalt pavement.