Development of a Viscoelastic Finite Element Tool for Asphalt Pavement Low Temperature Cracking Analysis

Development of a Viscoelastic Finite Element Tool for Asphalt Pavement Low Temperature Cracking Analysis
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沥青路面低温裂缝分析粘弹性有限元工具的开发

DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
L. Walubita
L. Walubita
中科院分区：
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文献类型：
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作者：
Sheng Hu;F. Zhou;L. Walubita

文献摘要

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本文提出并开发了一种基于粘弹性二维有限元法的路面低温开裂分析工具VE2D。该工具可以提供准确的温度应力评估和温度裂缝预测，同时考虑整个路面结构，而不仅仅是沥青混凝土层。此外，该工具有四个创新功能：首先，它采用了增强型综合气候模型（EICM），允许全面的路面温度分析作为深度的函数。其次，它可以很容易地执行线性粘弹性材料功能之间的相互转换，从而允许更大的灵活性方面的输入数据的材料性能，如松弛模量，复模量，或蠕变柔量。第三，薄层接触面单元法能很好地模拟路面层间的全粘结、全滑动等各种接触状态。第四，它是快速的，容易的，并且不需要复杂的FE信息作为输入数据。所有这些功能使该工具独一无二，特别适合路面工程师用于常规设计和分析应用。在本研究中，基于与其他分析解决方案和实际现场应用的比较，对VE 2D工具进行了验证，得出了合理的结果。
ABSTRACT This paper proposed and developed a tailored tool, “VE2D” for pavement low temperature cracking analysis based on viscoelastic two-dimensional (2D) finite element (FE) method. The tool can provide accurate thermal stress evaluation and thermal cracking prediction while considering the entire pavement structure rather than just the asphalt concrete layer. Also, this tool has four innovative features: Firstly, it incorporates the Enhanced Integrated Climate Model (EICM) that allows for a comprehensive pavement temperature analysis as a function of depth. Secondly, it can readily perform the interconversion between linear viscoelastic material functions, thus allowing greater flexibility in terms of the input data for the material properties such as relaxation modulus, complex modulus, or creep compliance. Thirdly, it can well simulate variable pavement layer contact conditions (such as fully-bonding, fully-sliding, etc) by using the thin-layer interface elements method. Fourthly, it is fast, easy, and does not require complicated FE information as input data. All these features make this tool unique and specifically suitable for pavement engineers to use for routine designs and analyses applications. Verification of the VE2D tool based on comparisons with other analytical solutions and actual field application yielded plausible results in this study.