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AASHTO2002沥青路面永久变形叠加方法验证

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Keywords: 道路工程,AASHTO,2002,APA,试验验证,永久变形叠加方法,应力历史

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Abstract:

沥青路面的永久变形叠加问题是永久变形研究中的难点。首先对现有的用于沥青路面中的叠加方法进行了分析,指出其不适合于永久变形叠加问题;而后对AASHTO2002柔性路面设计指南中的永久变形叠加方法进行了简要介绍,并采用两种APA试验方法对AASHTO叠加方法进行了验证。验证结果表明,AASHTO方法并不能准确预估永久变形;应力历史对永久变形叠加结果有很大影响,而以应变硬化原理为基础的AASHTO叠加方法不能体现应力历史的影响。因此,AASHTO2002的叠加方法还存在着一些局限,需要进行修订。

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