层间接触状态对沥青路面结构力学响应的影响

Effect of Bonding Condition between Asphalt Layer and Semi-Rigid Layer on Structural Mechanics Response of Asphalt Pavement

沥青路面中层间接触状态非常复杂,它对路面的使用性能有直接影响。针对我国当前采用的典型半刚性沥青路面结构,采用GAMES多层弹性体系计算程序,系统分析了层间接触状态对表面弯沉、表面拉应变、面层内剪应力、沥青层底拉应变以及沥青层底剪应力的影响。分析结果表明:层间接触状态的变化对沥青层底的拉应变影响最为显著,其次为基面层间的剪应力,对路表的拉应变和基层底拉应变影响也较为明显;相对而言,路表弯沉、面层内最大剪应力对层间接触状态的变化不敏感。

Bonding condition between adjacent layers is complicated in semi-rigid asphalt pavement, which can directly affect the road performance. By using a multi-layered elastic analysis program （GAMES） superior to BISAR, a study is conducted to analyze the mechanics response when changing the bonding condition between asphalt layer and semi-rigid layer. The results indicate that the bonding condition has the most significant effect on the tensile strain at the bottom of asphalt layer and the shear stress between the asphalt and semi-rigid layer, followed by the tensile strain at the asphalt layer surface as well as the bottom of base layer. Relatively, the shear stress in asphalt layer and the surface deflection are not sensitive to the change of the interlayer （asphalt-semi-rigid） bonding condition.