Zhou Wei, Dou Yingying, Chen Chupeng, Yang Yi, Xu Xinquan, Li Lintao, Xiao Jiangyin, Chen Feng
Guangdong Provincial Transportation Industrial Investment Co., Ltd., Guangzhou 510623, China.
Guangdong Hualu Transport Technology Co., Ltd., Guangzhou 510420, China.
Materials (Basel). 2025 Jul 16;18(14):3335. doi: 10.3390/ma18143335.
Traditional ultra-thin asphalt wearing course designs often oversimplify wheel loads as uniform pressures, neglecting critical non-uniform effects. This study establishes a 3D finite element model incorporating realistic non-uniform tire loading to reveal its mechanistic influence on pavement responses. Results demonstrate that non-uniform loading significantly alters stress states in ultra-thin layers, substantially elevating critical stresses compared to uniform assumptions. A novel Non-uniform Load Influence Factor (NLIF) accounting for thickness effects is developed to quantify these deviations. The analysis provides a foundation for revising material strength specifications and fatigue design criteria, contributing to improved performance and durability of ultra-thin pavement systems.
传统的超薄沥青磨耗层设计常常将车轮荷载过度简化为均匀压力，而忽略了关键的非均匀效应。本研究建立了一个包含实际非均匀轮胎荷载的三维有限元模型，以揭示其对路面响应的力学影响。结果表明，与均匀假设相比，非均匀荷载显著改变了超薄层中的应力状态，大幅提高了临界应力。开发了一种考虑厚度效应的新型非均匀荷载影响因子（NLIF）来量化这些偏差。该分析为修订材料强度规范和疲劳设计标准提供了基础，有助于提高超薄路面系统的性能和耐久性。
