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首页> 外文期刊>Construction and Building Materials >Reflective crack in semi-rigid base asphalt pavement under temperature-traffic coupled dynamics using XFEM
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Reflective crack in semi-rigid base asphalt pavement under temperature-traffic coupled dynamics using XFEM

机译：基于XFEM的温度-交通耦合动力学下半刚性基层沥青路面反射裂缝。

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Reflective crack of asphalt concrete overlays is one of the major distresses in semi-rigid base asphalt pavement. Multiple researches have been carried out to investigate the fracture mechanism of reflective crack. However, most of the researches have payed close attention to reflective crack caused by temperature load or traffic load, respectively. In this paper, reflective crack mechanisms of asphalt pavement under combined loads of temperature and moving traffic have been described using extended finite element method (XFEM). The integrated climatic model, in which solar radiation, surface heat flux, surface radiation were considered, was employed to prospect pavement temperature gradients. The standard biaxial loads including compressive stress and horizontal shear are considered as the moving traffic loads. A fracture mechanics-based XFEM, solving discontinuous problems, was employed for simulating crack initiation and propagation. The stress distribution, crack initiating temperature, crack opening displacement and crack propagating path are investigated in the asphalt pavement with three different overlay thicknesses. The results provided a new insight into mechanisms underlying the development of reflective crack under combined loads of temperature and moving traffic. (C) 2019 Published by Elsevier Ltd.
机译：沥青混凝土外墙的反射裂缝是半刚性基层沥青路面的主要困扰之一。已经进行了多项研究来研究反射裂缝的断裂机理。但是，大多数研究都分别密切关注由温度负荷或交通负荷引起的反射裂缝。本文利用扩展有限元方法（XFEM）描述了温度和移动交通共同作用下沥青路面的反射裂缝机理。考虑太阳辐射，表面热通量，表面辐射的综合气候模型被用来预测路面温度梯度。包括压应力和水平剪切力在内的标准双轴载荷被视为移动交通载荷。基于断裂力学的XFEM解决了不连续的问题，被用来模拟裂纹的萌生和扩展。研究了三种不同覆盖层厚度的沥青路面的应力分布，裂纹萌生温度，裂纹​​张开位移和裂纹扩展路径。结果为在温度和移动流量共同作用下反射裂纹的发展机理提供了新的见解。 （C）2019由Elsevier Ltd.发布

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