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Response Analysis of Asphalt Pavement under Dynamic Loadings: Loading Equivalence

机译：动态载荷下沥青路面响应分析：装载等价

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摘要

This paper establishes the equivalent relationships between the half-sinusoidal load, triangular load, vertical stepwise load, and moving traffic load. The governing equation was established for analyzing the dynamic responses of pavement, and half-sinusoidal load, triangular load, and vertical stepwise load functions were transformed into Fourier series expressions. The partial differential governing equations were simplified as ordinary differential equations and the analytical solutions were obtained. Further, the solutions were validated through comparing the theoretical results with numerical simulated results. Calculation results revealed that, for unchanged load periods, increasing the amplitudes of the three loads by 1.06, 1.31, and 1.35 times can better simulate the moving traffic loads. For unchanged load function amplitudes, increasing the function periods by 1.07, 2.23, and 2.1 times (for half-sinusoidal, triangular, and vertical stepwise loads, resp.) can improve the simulation performance. The fatigue life of asphalt pavements under the moving traffic load agrees with that of the three load simulations, indicating that the fatigue life of asphalt pavements is only associated with the load amplitude but not the load patterns.
机译：本文建立了半正弦载荷，三角载荷，垂直逐步负载和移动交通负荷之间的等效关系。建立了控制方程，用于分析路面的动态响应，半正弦载荷，三角形载荷和垂直逐步载荷函数转化为傅里叶级数表达。将部分差分控制方程被简化为常规方程，并获得分析溶液。此外，通过将理论结果与数值模拟结果进行比较来验证解决方案。计算结果表明，对于不变的负载周期，将三个负载的幅度增加1.06,1.31，1.35倍，可以更好地模拟移动的交通负荷。对于不变的负载功能幅度，将功能周期增加1.07,2.23和2.1次（对于半正弦，三角形，垂直逐步负载，REAC。）可以提高模拟性能。移动交通负荷下沥青路面的疲劳寿命同意三个负载模拟，表明沥青路面的疲劳寿命仅与负载幅度相关但不是负载模式相关联。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第16期|7020298.1-7020298.15|共15页
  • 作者

    Gao Lian-sheng; Dan Han-cheng; Li Liang;

  • 作者单位

    Cent S Univ Sch Civil Engn 22 Shaoshan South Rd Railway Campus Changsha 410075 Hunan Peoples R China;

    Cent S Univ Sch Civil Engn 22 Shaoshan South Rd Railway Campus Changsha 410075 Hunan Peoples R China;

    Cent S Univ Sch Civil Engn 22 Shaoshan South Rd Railway Campus Changsha 410075 Hunan Peoples R China;

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