山区陡坡水泥混凝土路面的应力分析

根据水泥混凝土路面的受力特点,运用三维有限元方法,分析在标准荷载作用下,不同道路纵坡面层层底最大拉应力、层底最大剪应力的变化规律,以及不同超载率对不同坡度下面层力学指标的影响。分析结果表明,拉应力和剪应力都随道路纵坡的增大而增加。其中,剪应力影响幅度较大,更易使面层开裂;超载情况下,应力指标均显著上升。因此,应尽量提高水泥混凝土面层的抗拉强度和抗剪强度,并严格限制陡坡路段车辆超载。

Stress Analysis of Cement Concrete Pavement of Steep Slope in Mountainous Region

According to the mechanical characters of the cement concrete pavement,the regularity of maximum tensile stress and the maximum shear stress of the pavement of steep slope by the standard load are analyzed by FEM.Then the influence of overload ratios on mechanical index of concrete surface is presented.The result shows the tensile stress and the shear stress increase with longitudinal slope heightening.The shear stress is affected mostly and it makes the surface easier for cracking.The stress index evidentl...