Dynamic simulation of a flexible pavement layers considering shakedown effects and soil-asphalt interaction
Dynamic simulation of a flexible pavement layers considering shakedown effects and soil-asphalt interaction
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DOI：
10.1016/j.trgeo.2016.04.003
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发表时间：
2016-06-01
影响因子：
5.3
通讯作者：
Rosano, Michele
中科院分区：
文献类型：
--
作者：
Ghadimi, Behzad;Nikraz, Hamid;Rosano, Michele
研究了安定和土沥青相互作用对柔性层状路面结构动力模拟的影响。在一种新开发的评估方法中，安定概念被用于沥青混凝土下的颗粒层。在这种评估下，颗粒材料的行为随着加载循环次数的增加而从塑性转变为弹性。相互作用力是通过放置在基层和沥青层之间的接触元件来考虑的。利用弹性域的非线性应力依赖模型和塑性域的Mohr-Coulomb本构模型来模拟颗粒层的行为，模拟结果与先前发表的文献进行了验证。对单轮胎双轴在哈弗辛循环载荷下的静态仿真和三种不同的动态仿真进行了比较。第一次动态模拟假设了Mohr-Coulomb塑性，第二次模拟考虑了安定效应，第三次模拟计算了土沥青相互作用力。(C) 2016 Elsevier Ltd.版权所有。
This research evaluates the effects of shakedown and soil asphalt interaction on the dynamic simulation of flexible layered pavement structure. In a newly developed assessment methodology the shakedown concept is implemented for the granular layer under asphalt concrete. Under this assessment granular material behaviour changes from plastic to elastic as a function of the number of loading cycles. Interactional forces are considered through contact elements placed between the base and the asphalt layer. A nonlinear stress dependent model in the elastic domain and the Mohr-Coulomb constitutive model in the plastic domain are utilised to simulate the behaviour of granular layers and the results of the simulation are validated with previously published literature. One static simulation and three different dynamic simulations under cyclic Haversine loading of a single tyre dual axle are then compared with each other. The first dynamic simulation assumes Mohr-Coulomb plasticity, the second simulation considers the shakedown effects and the third simulation calculates soil asphalt interactional forces. (C) 2016 Elsevier Ltd. All rights reserved.