THE INFLUENCE OF LOW TEMPERATURE ON THE FATIGUE DAMAGE PROCESS OF CRACKED ASPHALT PAVEMENT

Abstract eng:
A finite element analysis is developed for the influence of temperature on the fatigue damage process of cracked asphalt pavement based on the theory of continuum damage mechanics. The pavement with surface cracks and reflected cracks, which is selected from Shen-Da Expressway - the first highway in China, is modeled as an inhomogeneous, laminate structure. The elastic modulus is assumed to be temperature-dependent and the temperature field to be a non-liner one. The numerical results demonstrate an interesting behavior that the maximum stress exists not in the crack tips but in the interface between damage zone and non-damage field. The theoretical prediction on the fatigue damage life indicates the results in reasonable agreement with that of the observation.

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