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本文在分析了三层连续体系中层弯拉应力的解析解和常见路面结构层厚度和模量范围的基础上,建立了三层连续体系中层弯拉应力显式计算的回归数学模型;并在对常见路面结构大量回归逼近计算的基础上,合理选用了分段回归的技术,成功地求得了常见路面结构弯拉应力的回归公式,分析表明其精度优于现行的查图法,与解析解比较误差也很小,完全满足工程精度要求。
Based on the analysis of analytical solution of bending stress in three-layer continuous system and the thickness and modulus range of common pavement structure layer, a regression mathematical model for explicit calculation of bending stress in three-layer continuous system is established. On the basis of a large number of common pavement structures regression approximation calculation, the regression regression formula of common pavement structure was successfully obtained by using the technique of piecewise regression reasonably. The analysis shows that the accuracy of the regression equation is better than the existing chart method and compared with the analytical solution The error is also very small, fully meet the requirements of engineering accuracy.