| 沥青路面荷载型裂缝的剪切机理与成因分析 |
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| 引用本文： | 李俊,谢军,赖正林.沥青路面荷载型裂缝的剪切机理与成因分析[J].北方交通,2012(4):1-5. |
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| 作者姓名： | 李俊 谢军 赖正林 |
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| 作者单位： | 长沙理工大学交通运输工程学院 |
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| 基金项目： | 国家自然科学基金项目(51008039/E080703);公路工程省部共建教育部重点实验室开放基金资助项目(kfj080107) |
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| 摘 要： | 越来越多的研究表明沥青路面轮迹带附近的荷载型裂缝与沥青面层内较大的应力水平尤其是剪应力有着直接的关系,为了探讨其破坏机理及力学成因,基于弹性层状体系在考虑水平荷载作用下进行半刚性基层路面剪应力有限元分析,分析沥青面层内剪应力分布规律,剪应力峰值变化情况,并对剪应力和拉应力进行对比分析。结合荷载型裂缝产生位置、深度等特点可以认为其产生的主要原因不是拉应力而是剪应力,对进一步研究荷载型裂缝的破坏机理、发展规律有一定的指导意义。
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| 关 键 词： | 沥青路面 有限元分析 剪应力 拉应力:荷载型裂缝 |
The Analysis of Shear Mechanism and Formation of Asphalt Pavement Load Cracking |
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| Institution: | LI Jun and others |
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| Abstract: | More and more evidences showed that asphalt pavement load cracking along wheelpath has direct relation to the high stress level in the asphalt pavement especially the shear stress.For the purpose of studing the shear mechanism of asphalt pavement load cracking,this paper based on elastic layered system make finite element analysis of semi-rigid asphalt pavement shear stress.The shear stress distribution regularities and maximum of shear and its direction are achieved.The locations of the shear stress and tensile stress were compared with load cracking characteristics and the maximum stress was compared with stress strength as well.The analysis shows that the major reason of asphalt pavement load cracking is shear stress not tensile stress.The research conclusions have certain guiding significance for the further study of asphalt pavement load cracking. |
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| Keywords: | Asphalt pavement Finite element analysis Shear stress Tensile stress Load cracking |
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