车辆动载作用下结构参数对水泥混凝土路面力学性能的影响

Influence of structure parameters on pavement mechanical properties under vehicles dynamical load

FWD能较好地模拟动荷载的作用,在对FWD动态弯沉盆的特性分析的基础上,以ANSYS有限元计算软件为工具,对FWD荷载作用于纵缝板边缘中部、板角、板中位置时的动力特性进行了模拟,得到了不同结构层厚度和材料强度的水泥混凝土路面结构在标准动荷载作用下的层间应力以及路表弯沉的变化规律,研究成果为水泥混凝土路面结构设计、了解路面结构在动载作用下的力学响应提供了理论依据和参考。

FWD can simulate dynamic vehicles load with excellent correlation.Based on the characteristic analyze of FWD dynamic deflection basin,the FWD load was simulated with finite element software ANSYS to analyse concrete pavement dynamic response when the load was distributed to longitudinal joint middle margin,slab corner and slab center respectively.The calculation results show the changing rule of dynamic deflection and stress under different structure layer thicknesses and materials strengths.The research result can provide concrete pavement structure design with theory basis and reference,besides it can be used to help understand mechanic responses under dynamic vehicles load.