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| 摘要: |
| 根据建立的集料三维体积级配与二维数量级配关系式,编制了沥青混合料二维数字试件生成程序;结合离散元基本原理,建立了包括沥青混合料离散元模型、离散单元接触模式选择和疲劳失效判断标准在内的一整套沥青混合料虚拟疲劳试验方法;通过沥青混合料小梁虚拟疲劳试验,分析了集料分布特征对混合料疲劳性能的影响.结果表明:沥青混合料虚拟疲劳试验能真实模拟其疲劳过程,虚拟试验结果与真实试验结果相差无几,所建立的虚拟疲劳试验方法可以作为沥青混合料疲劳性能分析的辅助手段;集料分布均匀性对混合料疲劳寿命影响较大,混合料内粗集料分布较为密集的区域是最易疲劳损坏之处. |
| 关键词: 沥青混合料 疲劳性能 虚拟疲劳试验 离散元 集料分布均匀性 |
| DOI： |
| 分类号:TU528.42 |
| 基金项目:国家高技术研究发展计划(863计划)资助项目，江苏省普通高校研究生科研创新计划资助项目? |
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| Research on Influence of Distribution Characteristics of Aggregate on Fatigue Performance of Asphalt Mixture |
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CHEN Jun HUANG Xiao-ming
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| Abstract: |
| The two-dimensional virtual structure fabrication procedure of asphalt mixture was formed based on the theoretical formula which was established to convert the volumetric gradation into the two-dimensional quantity gradation of aggregate.Method of virtual fatigue test was established that comprised the discrete element model of asphalt mixture,contact model of discrete element and fatigue criterion of mixture.The influence of distribution characteristics of aggregate on fatigue performance of asphalt mixtur... |
| Key words: asphalt mixture fatigue performance virtual fatigue test discrete element homogeneity of aggregate |
