| 摘要: |
| 为研究原路面加铺沥青混合料层后的整体疲劳性能，在模拟原路面的AC-16沥青混合料上加铺SMA-13沥青混合料制备复合小梁，对其进行弯曲试验，并使用数字图像相关（DIC）技术对复合小梁的不同层位进行细观分析.结果表明：复合小梁的疲劳寿命与试验温度、应力比、老化程度呈负相关关系；原路面为主要抵抗荷载的部分，加铺层则主要改善路面的功能性；复合小梁疲劳开裂过程可分为3个阶段，即损伤初始阶段、损伤发展阶段与损伤破坏阶段. |
| 关键词: 加铺路面 小梁弯曲试验 数字图像相关 宏-细观力学 |
| DOI：10.3969/j.issn.1007-9629.2023.01.012 |
| 分类号:U414 |
| 基金项目:国家自然科学基金资助项目（52168063）；自治区直属高校基本科研业务费项目（JY20220297，JY20220413） |
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| Analysis of Macroscopic and Mesoscopic Fatigue Characteristics of Asphalt Mixture Composite Small Beam |
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CUI Yanan1,2, ZHANG Qiang1,2, ZHANG Xiang1,2
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1.School of Civil Engineering， Inner Mongolia University of Technology， Hohhot 010051， China;2.Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region， Inner Mongolia University of Technology， Hohhot 010051， China
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| Abstract: |
| In order to study the overall fatigue performance of the original pavement with asphalt mixture overlayer， composite small beams were prepared by adding SMA-13 asphalt mixture over AC-16 asphalt mixture simulating the original pavement. The bending experiments were conducted and the mesoscopic scale analysis of different layers of the composite small beams was carried out using the digital image correlation（DIC） technique. The results show that the fatigue life of composite small beams is negatively correlated with the experimental temperature， stress ratio， and degree of aging. The original pavement is the main part to resist the load， and the overlayer improve mainly the functionality of the pavement. The fatigue cracking process of composite small beams can be divided into three stages， which are the initial damage stage， the damage development stage， and the damage destruction stage. |
| Key words: overlay pavement small beam bending experiment digital image correlation （DIC） macroscopic and mesoscopic mechanics |
