Transactions of Nanjing University of Aeronautics & Astronautics
Finite Element Modeling and Parametric Analysis of Pavement Dynamic Responses under Moving Vehicle Load
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Abstract:
This paper intends to develop finite element models that can simulate vehicle load moving on pavement system and reflect the pavement response of vehicle and pavement interaction. We conduct parametric analysis considering the influences of asphalt concrete layer modulus and thickness, base layer modulus and thickness, and subgrade modulus on pavement surface displacement, frequency, and strain response. The analysis findings are fruitful. Both the displacement basin width and maximum value of dynamic surface displacements are larger than those of static surface displacements. The frequency is positively correlated with the pavement structure moduli, and negatively correlated with the pavement structure thicknesses. The shape of dynamic and static tensile strain is similar along the depth of the pavement structure. The maximum value of dynamic tensile strain is larger than that of static tensile strain. The frequency of entire pavement structure holds more significant influence than the surface displacement and strain do. The subgrade modulus has a significant effect on surface displacement, frequency and strain.
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U416
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