To investigate the mechanical behaviour and moisture transport of pavement concrete under fatigue load and hydrodynamic coupling, a three-dimensional nonlinear numerical model was proposed and the distribution and change of the internal stress, strain and humidity were analysed at different concrete layers with the loading cycles. Furthermore, the proposed coupling model was validated by experimental results and the effect of stress level and loading frequency on the mechanical response of concrete were explored. The results showed that severer coupling conditions accelerate the deterioration of the concrete structure. After the stage, I loading, the water retained in the upper layer tends to transfer to the middle layer. 0.5 stress level can be seen as the threshold for pavement concrete from the elastic stage to the plastic stage. With the 0.7 stress level, the peak stress at the upper layer of the concrete is positively correlated with the loading frequency.

为研究疲劳荷载和水动力耦合作用下路面混凝土的力学行为和水分输运，提出了三维非线性数值模型，分析了不同混凝土层的内应力、应变和湿度随加载循环的分布和变化。 . 此外，通过实验结果验证了所提出的耦合模型，并探讨了应力水平和加载频率对混凝土力学响应的影响。结果表明，更恶劣的耦合条件加速了混凝土结构的劣化。在阶段，I加载之后，保留在上层的水倾向于转移到中间层。0.5应力水平可以看作是路面混凝土从弹性阶段到塑性阶段的阈值。与 0。