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首页> 外文会议>Airfield and highway pavement conference >Finite Element Modeling of Reflective Cracking under Moving Vehicular Loading: Investigation of the Mechanism of Reflective Cracking in Hot-Mix Asphalt Overlays Reinforced with Interlayer Systems
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Finite Element Modeling of Reflective Cracking under Moving Vehicular Loading: Investigation of the Mechanism of Reflective Cracking in Hot-Mix Asphalt Overlays Reinforced with Interlayer Systems

机译：车辆荷载作用下反射裂缝的有限元建模：夹层系统加固的热拌沥青路面反射裂缝的机理研究

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摘要

The fracture mechanism of reflective cracking in hot-mix asphalt (HMA) overlay was investigated using a three-dimensional finite element model utilizing the cohesive zone model. The effectiveness of interlayer systems to abate reflective cracking in overlays was evaluated. A fractured area due to potential reflective cracking was calculated at a region in which cohesive elements were inserted. A represent fracture area (RFA) is introduced as a weighted average value of degradation to calculate the fractured area. Utilizing global and local RFAs, the mechanism of reflective cracking is investigated for HMA overlay with interlayer systems. For various interlayer systems, this study found that different reflective cracking patterns occurred in terms of quantity and distribution. The sand mix interlayer reduces reflective cracking in leveling binder at the beginning; however, steel netting interlayer retards reflective cracking in wearing surface as well as leveling binder.
机译：利用内聚力区域模型，利用三维有限元模型研究了热拌沥青（HMA）覆盖层中反射裂缝的断裂机理。评估了中间层系统减轻覆盖层反射裂纹的有效性。在插入了粘性元件的区域中计算出由于潜在的反射裂纹而引起的断裂面积。引入代表断裂面积（RFA）作为退化的加权平均值，以计算断裂面积。利用全局和局部RFA，研究了具有层间系统的HMA覆盖层的反射裂纹的机理。对于各种夹层系统，这项研究发现，在数量和分布方面，会出现不同的反射裂缝模式。混砂中间层在开始时减少了流平粘结剂中的反射性开裂;但是，钢网夹层可以减缓磨损表面以及流平粘合剂中的反射裂纹。

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