Title: Deformation Regularity of Asphalt Pavement Based on Nonlinear Fatigue Damage Characteristics
Abstract: In order to study the fatigue damage characteristic and deformation regularity of asphalt pavement under vehicle load,by using the general finite element software ABAQUS and the secondary development platform,an asphalt pavement numerical model which considers pavement material nonlinear fatigue damage was established to analyze the spatial distribution/evolution of asphalt pavement structure damages,the spatial distribution/evolution of asphalt pavement structure horizontal normal strains,and the evolution of pavement surface deflection varying with loads under repeated vehicle load.The results show that(1) The pavement structural damage mainly distributes in a specific damage zone located at the bottom of the layer along the middle line between the double wheels.With the increasing of load cycles,the damage degrees at the bottom of the base layer and the sub-base layer increase,and the rate of which gradually increases.(2) The horizontal tensile strain close to the bottom of the pavement layer increases,the rate of which gradually increases,and neutral axis moves upward.(3) The deflection of pavement surface increases with the increase of load cycles,and the rate of which increases gradually.The regularity is in agreement with related measured results.The results can provide a theoretical support for asphalt pavement structure design,maintenance and prediction of the long-term performance.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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