Stress Analysis of Pavement Structure on Harbor-shaped Bus Stop of City

To solve he problem of serious premature damage of asphalt pavement structure of Harbor-shaped Bus Stop road of Beijing,a finite element model is built by using software ANSYS to stimulate the speed-varying braking and loading of large-scale bus stop roads.The results show that during vehicle braking,the road vertical displacement and horizontal shearing stresses of superficial pavement layer is increasing,and the horizontal shearing stresses of pavement layers alternate between positive and negative changes.The location of maximum shear stress of pavement layers varies under the moving load,and the most likely shear failure occures in the part of asphalt layer and at the location of combination asphalt layer with base course.The horizontal shearing stresses increase obviously and the vertical displacement increases little with increasing braking acceleration.Therefore,attention should be paid to enchancing the strength of structure layers and to improving the shear strength in design of Harbor-shaped Bus Stop asphalt pavement under frequent braking and loading.