| 表面含裂缝沥青路面低温收缩断裂分析 |
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| 引用本文： | 詹永祥,姚海林,卢正.表面含裂缝沥青路面低温收缩断裂分析[J].长沙交通学院学报,2010,26(3):20-24. |
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| 作者姓名： | 詹永祥 姚海林 卢正 |
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| 作者单位： | 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,湖北,武汉,430071 |
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| 基金项目： | 国家西部交通建设科技项目 |
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| 摘 要： | 考虑沥青混合料的感温特性,应用ABAQUS的瞬态热分析和热-力耦合求解技术,采用奇异单元及断裂力学理论,对沥青路面在低温大温差作用下的温度应力表面裂缝问题进行了数值分析.分析结果表明：外界环境温度变化对沥青路面面层的影响最大,其次是基层;低温收缩产生的温度拉应力在裂尖附近急剧增大,导致材料损伤,致使裂缝进一步扩展;降温幅度对应力强度因子KⅠ的影响显著,大温差是高寒地区沥青路面损伤的重要原因.
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| 关 键 词： | 沥青混凝土路面 表面裂缝 低温收缩 温度应力 断裂力学 |
Fracture mechanic analysis of the asphalt concrete pavement structure with surface crack under low-temperature shrinkage |
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| ZHAN Yong-xiang,YAO Hai-lin,LU Zheng.Fracture mechanic analysis of the asphalt concrete pavement structure with surface crack under low-temperature shrinkage[J].Journal of Changsha Communications University,2010,26(3):20-24. |
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| Authors: | ZHAN Yong-xiang YAO Hai-lin LU Zheng |
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| Institution: | ZHAN Yong-xiang,YAO Hai-lin,LU Zheng(State Key Laboratory of Geomechanics , Geotechnical Engineering,Institute ofRock , Soil Mechanics,Chinese Academy of Science,Wuhan 430071,China) |
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| Abstract: | Considering the asphalt mixture temperature characteristics,by using the techniques of thermal instantaneous analysis and thermal-structure coupling resolution in ABAQUS,the surface crack developed by temperature stress was analyzed with the singularity isoparametric elements and fracture mechanics theory under big temperature change at low temperature.The results show that the asphalt pavement surface layer is the greatest impact on the outside ambient temperature change,followed by pavement base.Temperatu... |
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| Keywords: | asphalt concrete pavement surface crack low-temperature shrinkage temperature stress fracture mechanics |
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