| 沥青路面反射裂纹温度应力的数值模拟 |
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| 引用本文： | 苗 雨,万云冬,董玉凯. 沥青路面反射裂纹温度应力的数值模拟[J]. 岩土力学, 2007, 28(Z1): 343-347 |
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| 作者姓名： | 苗 雨 万云冬 董玉凯 |
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| 作者单位： | 1. 华中科技大学 土木工程与力学学院，武汉 430074；2. 华中科技大学 控制结构湖北省重点实验室，武汉 430074； 3. 中国科学院 岩土力学重点实验室，武汉 430071；4. 漯河市公路管理局，河南 漯河 462000 |
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| 基金项目： | 中国科学院武汉岩土力学研究所岩土力学重点实验室开放课题基金资助项目(No. Z110507)。 |
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| 摘 要： | 考虑了沥青的黏弹性，结合传热学理论，通过有限元数值模拟研究了在温度场作用下反射裂纹的应力场，探讨了不同温度场及不同道路设计参数对裂纹温度应力的影响。研究表明，由于气温交替变化，基层裂纹附近应力大于沥青的抗拉强度，进而导致裂纹扩展到路面形成路面裂纹。提出了采用聚合物纤维土工织物阻裂方案，通过数值模拟验证了其有效性。
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| 关 键 词： | 沥青路面 反射裂纹 温度应力 有限元法 |
| 收稿时间： | 2007-04-23 |
Numerical simulation of thermal stress for reflective crack of asphalt pavement |
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| MIAO Yu,WAN Yun-dong,DONG Yu-kai. Numerical simulation of thermal stress for reflective crack of asphalt pavement[J]. Rock and Soil Mechanics, 2007, 28(Z1): 343-347 |
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| Authors: | MIAO Yu WAN Yun-dong DONG Yu-kai |
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| Affiliation: | 1. School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074,China; 2. Hubei Key Laboratory of Control Structure, Huazhong University of Science & Technology, Wuhan 430074,China; 3. Key Lab of Geomechanics, Chinese Academy of Sciences, Wuhan 430071, China; 4. Luohe Highway Administration ,Luohe 462000, China |
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| Abstract: | Based on theory of visco-elasticity and heat transfer, the stress of reflective crack under the thermal variation is studied by finite element simulation. The influence of variation stress fields and road design parameters on the thermal stress of the crack is discussed. It can be show that the surface stress near the crack is larger than the tensile strength of the asphalt, which leads to the crack propagation. The scheme of crack prevention, which uses the polyfibre geogrid, is put forward. Numerical results show that the validity of the present scheme. |
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| Keywords: | asphalt pavements reflective crack thermal stress finite element method |
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