Effects of Bearing Capacity and Load Transfer Efficiency of Jointed Concrete Pavements on Reflective Cracking in Hot-Mix Asphalt Overlays
Effects of Bearing Capacity and Load Transfer Efficiency of Jointed Concrete Pavements on Reflective Cracking in Hot-Mix Asphalt Overlays
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DOI：
10.1201/9780203865286-35
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发表时间：
2009-06
期刊：
影响因子：
--
通讯作者：
J. Baek;I. Al-Qadi
中科院分区：
文献类型：
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作者：
J. Baek;I. Al-Qadi
反射裂缝是热拌沥青混合料（HMA）加铺层的主要缺陷，由于环境和车辆荷载，在加铺层下方的不连续性附近诱发反射裂缝。研究了接缝式混凝土路面（JCP）上沥青混合料加铺层荷载相关反射裂缝的复合型断裂机理。使用三维有限元模型，联合响应加载进行评估，使用虚拟落锤式弯沉仪（FWD）测试。此外，瞬态移动车辆荷载施加在HMA覆盖表面上。针对JCP的承载力和荷载传递效率（LTE），对反射裂缝的行为进行了研究。利用FWD平均挠度和挠度比研究了反射裂缝的可能性。本研究得出结论：1）接缝处的临界拉应力和剪应力主要取决于路面路基承载力，2）承载力高度影响I型反射裂缝的萌生。
Reflective cracking is a major distress in hot-mix asphalt (HMA) overlays and is induced in the vicinity of discontinuities beneath the overlay due to environmental and vehicular loading. This study investigated the mixed-mode fracture mechanism of load-associated reflective cracking in HMA overlay placed on jointed concrete pavement (JCP). Using a three-dimensional finite element model, the joint response to loading was evaluated using virtual falling weight deflectometer (FWD) testing. In addition, a transient moving vehicular load was applied on the HMA overlay surface. The behavior of reflective cracking was investigated with respect to bearing capacity as well as load transfer efficiency (LTE) of the JCP. Reflective cracking potential was investigated using FWD average deflection and deflection ratio. This study concluded that 1) critical tensile and shear stresses at the joint primarily depend on pavement subgrade bearing capacity and 2) bearing capacity highly affects mode I reflective cracking initiation.