沥青路面系统可靠性优化设计方法研究

The Reliability and Optimal Design Method of Asphalt Pavement

将概率和优化的概念引入到沥青路面设计方法中，在保证效益和安全程度的前提下，结合考虑路面结构层厚度和冰冻的要求，以路面结构造价最小为目标函数，建立了沥青路面可靠性优化的数学模型。该模型中考虑了路面的多种失效模式，并用蒙特卡洛法计算路面的系统可靠度。选用ＤＦＰ算法成功地求解了数学模型的最优解，编制了相应的计算机程序。大量计算表明，该法收敛较快，精度较高，可供工程设计参考使用。

This paper analyses the design method of asphalt pavement based on the concept of probability and optimization. The mathematical model is established for reliability and optimal design method. Policies regard not only profit and safety but also the minimum and maximum layer thickness. The objective function is the cost of pavement structures. Multiple failure modes are considered in this model, system reliability is calculated using Monte Carlo method. The optimal solutions were searched successfully and relevant program has been developed. The results show good convergence and accuracy for engineering application.