基于时间硬化蠕变模型的组合式基层沥青路面结构车辙分析

发布时间：2018-04-01 05:34

本文选题：沥青路面　切入点：组合式基层　出处：《公路工程》2015年06期

【摘要】：为了研究组合式基层沥青路面的车辙性能,借助ABAQUS的时间硬化蠕变模型,计算了在连续变温条件下3种不同形式的组合式基层沥青路面结构的温度场和车辙深度。结果表明:通过ABAQUS定义热学参数,接入太阳辐射和路表热对流子程序,能较好地模拟沥青路面结构的温度梯度变化;随着路面深度增加,温度波动滞后时间逐渐增加,路面结构的平均温度在16:00达到最大值;竖向变形最大值位于路表面双轮轮隙中心,横向变形最大值位于中面层中部,由于中面层的横向迁移,在轮迹带两侧产生了隆起变形;通过合理的结构设计,厚式沥青层组合基层结构不会出现严重的车辙现象;ATB下面层、级配碎石上基层和水泥稳定碎石底基层的组合式基层沥青路面结构,其车辙深度最小,且能改善路面内部排水,延缓反射裂缝的产生。
[Abstract]:In order to study rutting performance of combined base asphalt pavement, the time hardening creep model of ABAQUS is used. The temperature field and rutting depth of three different types of composite asphalt pavement structures under continuous variable temperature conditions are calculated. The results show that the thermal parameters are defined by ABAQUS, and the solar radiation and surface heat convection subroutines are connected. With the increase of pavement depth, the lag time of temperature fluctuation increases gradually, and the average temperature of pavement structure reaches the maximum at 16:00. The maximum vertical deformation is located at the center of the double wheel gap on the surface of the road, and the maximum transverse deformation is located in the middle of the middle surface layer. Due to the lateral migration of the middle surface layer, the uplift deformation occurs on both sides of the wheel track. There will be no serious rutting phenomenon in the thick asphalt composite base structure. The composite asphalt pavement structure on graded macadam and cement stabilized macadam base will have the smallest rutting depth and can improve the internal drainage of pavement. Delay the creation of reflective cracks.
【作者单位】：湖南交通职业技术学院;
【基金】：湖南省教育厅科学研究项目(14C0409) 湖南省交通运输厅科技进步与创新项目(201404)
【分类号】：U416.217

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