DYNAMICAL ANALYSIS OF ASPHALT PAVEMENT DUE TO VEHICLE-ROAD INTERACTION

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (4) : 86-89,1.

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DYNAMICAL ANALYSIS OF ASPHALT PAVEMENT DUE TO VEHICLE-ROAD INTERACTION

Haoyu Li1,2 Shaopu Yang2 Shaohua Li2

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Abstract

A three-dimensional vehicle-road-foundation interference system is modeled. A moving vehicle is simplified to a “quarter-vehicle” model. A 3-D model of asphalt pavement is established based on the elastic layered theory. The time-dependent deflection and stress of the asphalt pavement are obtained by linking together the characteristics of a road profile, a moving vehicle, and a multiple layered pavement structure. A detailed model parametric study then follows to show the effect of vehicle velocity, suspension stiffness, suspension damping, tire stiffness, and tire damping on the road dynamic response. The study is conducted with program ANSYS. The results show that in the three-dimensional pressure, the failure of asphalt concrete is mainly caused by shear stress. The maximal horizontal tensile stress and the maximal transverse tensile stress all emerge in joint region of base course and subbase. The influences of the vehicle speed on the pavement dynamic responses is complicated, which should be further discussed considering road profile and vehicle model . The pavement dynamic responses decrease with the increase of suspension stiffness, suspension damping, and tire stiffness .These conclusions may be useful for further analysis of the dynamic responses and damages of road structure, as well as the interference effect between vehicle and road.

Key words

vehicle-road-foundation / asphalt pavement / moving load / finite element analysis

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Haoyu Li;Shaopu Yang Shaohua Li. DYNAMICAL ANALYSIS OF ASPHALT PAVEMENT DUE TO VEHICLE-ROAD INTERACTION [J]. Journal of Vibration and Shock, 2009, 28(4): 86-89,1