弹性地基上复合路面结构轴对称问题荷载应力分析

LOAD STRESS ANALYSIS OF AXISYMMETRICAL DEFORMATION FOR COMPOUND PAVEMENT STRUCTURE ON THE ELASTIC FOUNDATION

提出一个分析复合路面荷载应力的一般方法，阐明了由于拉奇耦合效应的存在．复合路面几何中面不是中性面。由几何中面向下平移某一个距离后，可得到近似足够的中性面，以中性面为参考面的挠曲方程在形式上与单层路面的相应方程相同，只是抗弯刚度由平移刚度代替。已有关于挠度的解析结果可直接引用．各层应力极易地由各自的应力应交关系求出。

In this paper, a general method of stress analysis is developed for compound pavement structure. It has been clarified that the geometrical middle plane of compound parement structure isnot a neutral plane, owing to the couple effect between stretching and bending deformation. Aftertranslating downward some distance from middle plane, we can get an approximating neutralplane. Refering to this neutral plane, the equation of deflection has the same form with single plypavement, but the translating axial rigidity must be used in stead of the flexural rigidity. Thus,the solution Of deflection equation can be got directly from known result. The stress of individualply can be calculated easily from the stress-strain relation.