李智;靖红晨;王子硕;

• 1:华南理工大学土木与交通学院

摘要(Abstract)：

离散元数值仿真技术在沥青混合料数字化设计、体积特性研究方面优势明显,因此基于PFC 5.0离散元平台开发集料混合料模型生成方法,针对沥青混合料体积特性开展多因素多水平研究。以道路工程常用的抗滑层加铺材料UTAC-10为研究对象,设计正交试验,开展UTAC-10粗集料骨架间隙率虚拟仿真试验,分别探究级配、针片状质量分数及棱角性对UTAC-10混合料骨架间隙率的影响及其交互影响。研究表明:基于三维结构光扫描技术得到的集料模型形态准确逼真,集料混合料离散元模型生成效率较高;粗集料级配、棱角性及其交互作用均对骨架间隙率产生显著影响,但棱角性对骨架间隙率的影响更加显著,级配其次,最后为交互作用;9%～15%之内的针片状质量分数变化及与集配、棱角性的交互效应对骨架间隙率影响不显著;级配变细棱角性降低,骨架间隙率值有下降趋势;级配变粗棱角性增加,骨架间隙率呈增加趋势。

关键词(KeyWords)： 沥青混合料;离散元法;多因素;体积特性;交互效应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51378223);; 广东省交通运输厅科技项目(2014-02-003,2016-02-002)

作者(Author): 李智;靖红晨;王子硕;

Email:

DOI: 10.13624/j.cnki.issn.1001-7445.2020.1301

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