Effects of Layer Interfacial Bonding Conditions on the Mechanistic Responses in Asphalt Pavements
Effects of Layer Interfacial Bonding Conditions on the Mechanistic Responses in Asphalt Pavements
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DOI：
10.1061/(asce)te.1943-5436.0000184
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Xiaodi Hu;L. Walubita
中科院分区：
文献类型：
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作者：
Xiaodi Hu;L. Walubita
路面层间粘结状况对路面结构的使用性能起着重要的作用。本文采用三维有限元（3D-FE）程序模拟沥青混凝土（AC）层的力学响应（应力和应变），通过模拟两层界面粘结条件，即完全粘结和脱粘（即，层分离但仍考虑摩擦）。3D-FE建模包括实际测量的垂直轮胎-路面接触压力（TPCP）和假设的水平TPCP，包括研究车辆加速和减速的影响。这些计算模型的结果在本文中，并表明，层间粘结条件有显着的影响，一些路面力学响应，如拉伸，压缩和剪切应力/应变AC路面结构。在一般情况下，层界面脱粘（或分离）分析发现，间接加剧路面的困扰，如滑移开裂，疲劳开裂，推挤，剪切变形，车辙，这是不可取的。
The bonding condition between pavement layers plays an important role in the performance of pavement structures. In this paper, a three dimensional finite-element (3D-FE) program was used for modeling the mechanistic responses (stresses and strains) in the asphalt concrete (AC) layers by simulating two layer interfacial bonding conditions, namely fully bonded and debonded (i.e., the layer separated but still considering friction). The 3D-FE modeling incorporated actual measured vertical tire-pavement contact pressure (TPCP) and assumed horizontal TPCP, including investigating the effects of vehicle acceleration and deceleration. The results of these computational modeling are presented in this paper and indicated that the layer interfacial bonding condition has a significant effect on some pavement mechanistic responses such as the tensile, compressive, and shear stresses/strains in AC pavement structures. In general, layer interface debonding (or separation) was analytically found to indirectly exacerbate pavement distresses such as slippage cracking, fatigue cracking, shoving, shear deformation, and rutting, which is undesirable.