| 荷载与渗压耦合作用下沥青面层层底裂纹扩展分析 |
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| 引用本文： | 吴国雄,谭栋杰,袁传泯. 荷载与渗压耦合作用下沥青面层层底裂纹扩展分析[J]. 重庆交通大学学报(自然科学版), 2012, 31(5): 962-965 |
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| 作者姓名： | 吴国雄 谭栋杰 袁传泯 |
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| 作者单位： | 1. 重庆交通大学土木建筑学院,重庆,400074
2. 重庆市市政设计研究院,重庆,400072 |
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| 基金项目： | 国家自然科学基金项目，教育部博士点基金项目 |
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| 摘 要： | 基于线弹性断裂力学原理和有限元分析方法,对汽车荷载与动水压力耦合作用的面层层底含裂纹的沥青路面进行裂纹扩展规律研究与分析.结果表明:动水压力的作用明显改变了对称荷载与偏荷载作用下沥青面层层底的裂纹扩展规律,并随着动水压力增大,裂纹尖端呈现张拉型扩展与剪切型扩展共同作用的复合形式,从而加速了沥青路面的破坏.
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| 关 键 词： | 沥青路面 汽车荷载 动水压力 耦合作用 裂纹扩展 有限元分析 |
Analysis of Crack Growth on the Understratum of Asphalt Surface under Coupling Effect of Vehicle Load and Seepage Pressure |
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| Wu Guoxiong , Tan Dongjie , Yuan Chuanmin. Analysis of Crack Growth on the Understratum of Asphalt Surface under Coupling Effect of Vehicle Load and Seepage Pressure[J]. Journal of Chongqing Jiaotong University, 2012, 31(5): 962-965 |
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| Authors: | Wu Guoxiong Tan Dongjie Yuan Chuanmin |
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| Affiliation: | 1.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2.Chongqing Municipal Engineering Design & Research Institute,Chongqing 400072,China) |
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| Abstract: | Based on the linear elastic fracture mechanics and the finite element analysis method,this thesis analyzes the crack growth on the understratum with cracks of the surface of the asphalt pavement under coupling effect of vehicle load and hydrodynamic pressure.The result shows that the hydrodynamic pressure significantly changes the crack growth regularity of the understratum of the asphalt surface under symmetrical load and partial load.As the hydrodynamic pressure increases,the crack-tip shows compound forms of stretching growth and shearing growth,which accelerates the damage of the asphalt pavement. |
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| Keywords: | asphalt pavement hydrodynamic pressure vehicle load coupling effect crack growth finite element analysis |
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