基层对层间连续路面应力强度因子影响的研究

应用权函数理论，推导出了层间完全连续路面裂缝的权函数和应力强度因子计算方法，并通过所编制的程序分析了层间连续沥青路面应力强度因子与基层参数的关系，分析表明：增加基层模量可以降低沥青层应力强度因子，但会增加基层应力强度因子；增加基层厚度可以降低沥青层和基层应力强度因子，但基层厚度大时对沥青层应力强度因子的影响较小，裂缝长度对应力强度因子影响较明显，增加胎压也会显著增加应力强度因子。

Influence of Base Layer on the Stress Intensity Factor of Pavement with Continual Layers

The weight function of the internal crack in the pavement with continual layers is derived according to the weight function theory and the relations between the stress intensity factor of the pavement calculated by the self-made programmin g, and the granular base layer are also analyzed. It can be concluded that the higher the modulus of the base layer's modulus is, the lower the KⅠ valu e of the asphalt layer is, but the higher the KⅠ value of the base layer will be, and that the KⅠ value of both the asphalt layer and the base layer w ill reduce if the modulus of base layer reduces, but the decrement of the K Ⅰ value of the asphalt layer is small when the height of the base layer is hi gh. Result can also be obtained that the crack length influences the KⅠ v alue greatly and that the KⅠ value will increase greatly when increasing the p ressure of tyre.