| 温度场作用下的反射裂纹应力场分析 |
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| 引用本文： | 董玉凯,苗雨,万云冬.温度场作用下的反射裂纹应力场分析[J].土工基础,2008,22(5):59-61,64. |
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| 作者姓名： | 董玉凯 苗雨 万云冬 |
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| 作者单位： | 1. 漯河市公路管理局,河南漯河,462000;华中科技大学,武汉,430074
2. 华中科技大学,武汉,430074 |
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| 摘 要： | 考虑了沥青混合料的热粘弹特性，结合热传导理论，通过有限元数值模拟，研究在温度场作用下反射裂纹的应力场。分析表明，在较低温度环境下，会使基层裂纹附近存在高应力区，当其应力值大于沥青的抗拉强度时，会导致裂纹的产生并扩展到路面形成路面裂纹。提出了采用聚酯纤维增强型沥青的阻裂方案，通过数值模拟验证了其有效性。
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| 关 键 词： | 聚酯纤维 反射裂纹 温度应力 有限元法 |
Numerical Simulation of Temperature Field for Reflective Crack of Asphalt Pavement |
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| DONG Yu kai,MIAO Yu,WAN Yun dong.Numerical Simulation of Temperature Field for Reflective Crack of Asphalt Pavement[J].Soie Engineering and Foundation,2008,22(5):59-61,64. |
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| Authors: | DONG Yu kai MIAO Yu WAN Yun dong |
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| Affiliation: | DONG Yu kai, MIAO Yu, WAN Yun dong (1. Luohe Highway Administration, Luohe henan 462000; 2. Huazhong University of Science ＆ Technology, Wuhan 430074, China) |
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| Abstract: | Based on theories of visco-elasticity and heat transfer, the stress field of reflective crack under the temperature field is studied by finite element simulation. The influence of variation stress fields and road design parameters for the temperature stress of crack are discussed. It shows that the surface stress near the crack is larger than the tensile strength of asphalt, which leads to the crack propagation. The scheme of crack prevention, in which the polyfibre geogrid is used, is presented. Numerical results show the validity of it. |
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| Keywords: | polyester fibers reflective crack temperature stress finite element method |
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