水平荷载作用下的路面结构应力

The stress of road structure under horizontal load

从一种新的角度重新研究路面结构层受水平荷载作用时的剪应力这一路面专业的经典课题。采用四边形截面轴对称环状单元的有限元方法 ,给出了单元刚度矩阵公式、单元划分及结点编号方法。结合路面结构实例计算了受水平荷载作用时剪应力沿深度的分布。通过分析计算结果 ,提出水平荷载大小、结构层特性及不同荷载图式等因素对路面结构层中应力产生的作用规律。总结了提高路面抗剪能力应采取的措施。

The shear stress, when vehicle loads is landed on the surface, is a canon subject in highway engineering. This paper deals with it from a new point of view.A special element model, which is axial symmetry and has quadrangle section, is used,and the equation for computing matrix K and the methods of dividing and enumerating of elements are all given. There is an actual pavement structure using this method mentioned above to illustrate the law of stress allocation. Through analyzing the results, The influence of load magnitude, characters of layers and different load patterns on stress in layers are shown. Some methods used for improving the shear resistance are put forward,and they can be taken as the guidance for design and construction.