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| 沥青混凝土断裂性能模拟研究 |
| Numerical Study on Fracture Properties of Asphalt Concrete |
| 投稿时间：2020-11-24 |
| DOI：10.16018/j.cnki.cn32-1650/n.202103010 |
| 中文关键词: 沥青混凝土 断裂 内聚力单元法 随机骨料 |
| 英文关键词: asphalt concrete fracture cohesive force element method random aggregate |
| 基金项目:安徽省高校自然科学基金重点项目(KJ2016A286、KJ2016A287、KJ2018A0734)。 |
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| 中文摘要: |
| 沥青混凝土开裂是沥青路面的主要病害之一。采用标准半圆形弯曲梁(SCB)试验及有限元模拟对沥青混凝土断裂机理进行研究。结合内聚力单元法与随机骨料建模技术对沥青混凝土断裂行为进行模拟仿真，通过生成随机骨料模型，探究骨料随机分布对沥青混凝土断裂行为的影响。结果表明:该模拟方法考虑了骨料对裂缝扩展的影响，能够有效地预测沥青混凝土的断裂行为，对沥青路面设计具有指导意义。 |
| 英文摘要: |
| Asphalt concrete cracking is one of the main diseases of asphalt pavement. The fracture mechanism of asphalt concrete was studied by standard semi-circular curved beam(SCB)test and finite element simulation. Combined with cohesive force element method and random aggregate modeling technology, the fracture behavior of asphalt concrete is simulated. By generating random aggregate model, the influence of random distribution of aggregate on the fracture behavior of asphalt concrete is explored. The results show that the simulation method considers the influence of aggregate on crack propagation, can effectively predict the fracture behavior of asphalt concrete, and has guiding significance for asphalt pavement design. |
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