Viscoelastic Analysis of Hot Mix Asphalt Pavement Structures
Viscoelastic Analysis of Hot Mix Asphalt Pavement Structures
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. G.;M.;G. M.
中科院分区：
文献类型：
--
作者：
M. G.;M.;G. M.
提出了一种基于改进材料特性的力学路面设计分析新方法，能更准确地反映材料的疲劳开裂和永久变形性能。该方法的关键组成部分包括：(a)耗散能量疲劳准则，其中沥青材料中耗散的累积能量与疲劳损伤成正比；(b)粘弹性材料表征；(c)使用有限元方法进行路面分析，以确定对重复车轮加载的响应。沥青材料随温度变化的性质是该过程的一个关键特征，使用热流模型提供了温度条件。该程序的输出包括在各种载荷应用下的疲劳损伤百分比和车辙深度的预测。
A new method of analysis for mechanistic pavement design has been developed based on improved material characteristics, which more accurately reflects fatigue cracking and permanent deformation performance. The key components of the method involve the (a) dissipated energy fatigue criterion in which the cumulative energy dissipated in asphaltic materiaIS is directly proportional to fatigue damage, (b) viscoelastic materials characterization, and (c) pavement analysis using the finite-element method for determining response to repeated wheel loading. The changing properties of asphaltic materials with temperature are a key feature of the procedure with temperature conditions being provided by using a heat flow model. Output of the program includes predictions of percentage fatigue damage and rut depth at various numbers of load applications.