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Discrete element simulation on anti-rutting performance of PAC-13 pavement in urban roads

机译：Discrete element simulation on anti-rutting performance of PAC-13 pavement in urban roads

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摘要

The discrete element software PFC3D was applied to establish a virtual rutting test for PAC-13 porous asphalt pavement and the rutting resistance of porous asphalt pavement was studied. The image processing technology and 3D modeling technology were used to establish a 3D aggregate model library, and the PAC-13 asphalt mixture was simulated. The reliability of the method was verified by comparing the virtual rutting test with the indoor rutting test. In addition, the influence of aggregate gradation and environmental temperature on the rutting resistance of porous asphalt mixture was discussed. The stress response of the pavement structure under the braking load was analyzed, the curve of the internal stress of the pavement structure with the depth under the braking load was obtained, and the position of the maximum deformation was predicted. The influence of aggregate gradation on the deformation of the specimen plate under the braking force was discussed. The results show that the simulation results of the virtual model established by PFC3D fit well with the indoor test, and can simulate the rutting test of the porous asphalt mixture. Coarse aggregate gradation has a significant effect on the anti-rutting performance of porous asphalt mixtures. The effect of temperature on the anti-rutting performance of asphalt mixtures is closely related to the softening point of asphalt. With the increase of acceleration, the road surface will move forward along the direction of travel, and the displacement will gradually increase; while the displacement in the vertical direction will decrease significantly with the increase of acceleration.

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