张志清, 白胜伟, 王贵增, 王文华, 赵文丁. 城市公交港湾路面结构应力分析[J]. 北京工业大学学报, 2010, 36(9): 1248-1252.
    引用本文: 张志清, 白胜伟, 王贵增, 王文华, 赵文丁. 城市公交港湾路面结构应力分析[J]. 北京工业大学学报, 2010, 36(9): 1248-1252.
    ZHANG Zhi-qing, BAI Sheng-wei, WANG Gui-zeng, WANG Wen-hua, ZHAO Wen-ding. Stress Analysis of Pavement Structure on Harbor-shaped Bus Stop of City[J]. Journal of Beijing University of Technology, 2010, 36(9): 1248-1252.
    Citation: ZHANG Zhi-qing, BAI Sheng-wei, WANG Gui-zeng, WANG Wen-hua, ZHAO Wen-ding. Stress Analysis of Pavement Structure on Harbor-shaped Bus Stop of City[J]. Journal of Beijing University of Technology, 2010, 36(9): 1248-1252.

    城市公交港湾路面结构应力分析

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

    • 摘要: 针对北京公交港湾沥青路面严重的早期破坏,通过建立三维有限元模型,对大容量公交进出公交港湾时对路面结构施加的变速移动荷载进行加载模拟.数值分析结果表明,在车辆制动过程中,路面竖向位移、层间剪应力均有所增大,且路面结构层中剪应力正负交替变化;在动荷载的作用下,沥青结构层中最大剪应力的位置发生变化,最容易发生剪切破坏的部位是沥青面层内及面层与基层结合处;进站加速度增大使路面层间剪应力明显增大,竖向位移略有增大.因此,在城市公交港湾路面结构设计时,不仅要提高路面结构层的整体强度,更应重视面层及层间的抗剪强度.

       

      Abstract: 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.

       

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