Li Pu, Fu Jiahao, Sun Linhao, Yue Jinchao, Zang Quansheng
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China.
Zhengzhou Public Uility Investment and Development Group Co., Zhengzhou 450001, China.
Materials (Basel). 2025 Sep 4;18(17):4153. doi: 10.3390/ma18174153.
Increasing the frequency and duration of extreme heat events significantly compromises asphalt pavement performance, particularly in critical urban infrastructure such as heavily trafficked pavements, BRT lanes, and intersections subjected to slow-moving heavy traffic under extreme temperatures. This study systematically investigates rutting formation mechanisms through integrated theoretical and numerical approaches, addressing significant knowledge gaps regarding rutting evolution under coupled extreme-temperature (70 °C), heavy-load (100 kN-225 kN), and braking conditions (1 m/s-7 m/s). A three-dimensional thermo-mechanical finite element model integrating solar radiation heat transfer with the Bailey-Norton creep law was developed to quantify synergistic effects of axle loads, travel speeds, and braking accelerations. Results demonstrate that when the pavement surface temperature rises from 34 °C to 70 °C, the rutting depth is increased by 4.83 times. When the axle load is increased from 100 kN to 225 kN, the rutting of conventional asphalt pavements under 70 °C is increased by 56.4%. Rutting is exacerbated by braking acceleration; due to prolonged loading duration under low acceleration, the rutting depth is increased by 30-40% compared with that under emergency braking. These findings establish theoretical foundations for optimizing pavement design and material selection in slow-moving heavy-load environments, delivering significant engineering value for transportation infrastructure.
极端高温事件频率和持续时间的增加会显著损害沥青路面性能，特别是在关键的城市基础设施中，如交通繁忙的路面、快速公交专用道以及在极端温度下承受缓慢移动的重型交通的十字路口。本研究通过综合理论和数值方法系统地研究车辙形成机制，解决了在极端温度（70°C）、重载（100 kN - 225 kN）和制动条件（1 m/s - 7 m/s）耦合作用下车辙演变方面的重大知识空白。开发了一个三维热 - 力学有限元模型，该模型将太阳辐射传热与贝利 - 诺顿蠕变定律相结合，以量化轴载、行驶速度和制动加速度的协同效应。结果表明，当路面表面温度从34°C升至70°C时，车辙深度增加4.83倍。当轴载从100 kN增加到225 kN时，70°C下常规沥青路面的车辙增加56.4%。制动加速度会加剧车辙；由于在低加速度下加载持续时间延长，与紧急制动相比，车辙深度增加30 - 40%。这些发现为在缓慢移动的重载环境中优化路面设计和材料选择奠定了理论基础，为交通基础设施提供了重要的工程价值。
