钢桥面环氧沥青铺装层动水压力数值仿真分析

Numerical Simulation of Hydrodynamic Pressure of Epoxy Asphalt Pavement on Steel Bridge Deck

针对行车荷载下铺装层表面动水压力对铺装层的影响,研究钢桥面环氧沥青混凝土铺装水损害现象,量化分析行车荷载下钢桥面环氧沥青铺装层的动水压力。采用有限元软件ABAQUS建立轮胎-钢桥面环氧沥青铺装层模型,获取流体计算域中轮胎的形状及尺寸;基于计算流体力学建立钢桥面正交异性板铺装复合有限元模型,采用FLUENT数值仿真轮胎在有水铺装层表面上行驶时产生的动水压力;分析行车速度、水膜厚度、轮胎花纹深度等因素对动水压力的影响,得到动水压力的最不利工况。

For the influence of dynamic hydraulic pressure on the pavement layer surface under the vehicle load, the water damage to the epoxy asphalt pavement on the steel bridge deck and its hydraulic pressure are studied in the paper. The finite element software ABAQUS is adopted to establish the tire-deck paving interaction model of the epoxy asphalt pavement to obtain tire shape and size of the fluid computational domain. The orthotropic composite finite element model of the steel bridge deck is established based on hydromechanics, and the dynamic water pressure generated by the tires traveling on the pavement surface is numerically simulated by FLUNET. Finally, the impact of such factors as driving speed, water film thickness and tire tread depth on the hydraulic pressure is analyzed and the most unfavorable condition is obtained.