考虑层间状态的沥青面层动应变疲劳数值分析

发布时间：2018-07-08 14:22

本文选题：沥青面层 + 层间接触状态　；参考：《西南交通大学学报》2014年04期

【摘要】：为确定沥青层疲劳寿命与层间接触状态、温度和轴载荷等因素之间的关系,运用ABAQUS有限元软件,建立了考虑层间状态的沥青路面结构数值计算模型,分析了这些因素对沥青层底动应变的影响规律;通过引入常用的沥青路面疲劳寿命模型,构建了适用于半刚性沥青路面的沥青层或超薄路面的沥青层在多因素作用下的疲劳方程一般表达式,确立了沥青层疲劳寿命与各影响因素间的作用关系及其最不利点位.研究结果表明:层间结合系数、温度、轴载荷均对沥青面层疲劳寿命具有明显影响,且分析点位不同,影响程度不同;加强层间粘结能显著提高沥青面层疲劳寿命,在最不利分析点位处,当层间结合系数由0.5增大到0.7时,疲劳寿命提高13.6倍.
[Abstract]:In order to determine the relationship between fatigue life of asphalt layer and interlayer contact state, temperature and axial load, a numerical calculation model of asphalt pavement structure considering interlayer state is established by using Abaqus finite element software. The influence of these factors on the dynamic strain of asphalt pavement is analyzed, and the fatigue life model of asphalt pavement is introduced. The general expression of the fatigue equation of asphalt or ultra-thin asphalt pavement for semi-rigid asphalt pavement under the action of many factors is established. The relationship between the fatigue life of asphalt layer and the influencing factors and the most disadvantageous point are established. The results show that the interlaminar bonding coefficient, temperature and axial load have a significant effect on the fatigue life of asphalt surface layer, and the analysis points are different, the influence degree is different, and the strengthening of interlayer bonding can significantly improve the fatigue life of asphalt surface layer. When the interlaminar bonding coefficient is increased from 0.5 to 0.7, the fatigue life is increased by 13.6 times at the most unfavorable point of analysis.
【作者单位】：西南交通大学土木工程学院;四川成德南高速公路有限责任公司;四川省道路工程重点实验室;湖北省交通规划设计院;
【基金】：国家自然科学基金资助项目(51378433) 四川省交通厅科技资助项目(SC2008.1-3-1) 中央高校基本科研业务费专项资金资助项目(SWJTU12ZT05)
【分类号】：U416.217

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