倒装式基层沥青路面结构力学行为分析

Mechanical Behavior Analysis of Asphalt Pavement Structure with an Inverted Base Layer

采用有限元法,对倒装式基层沥青路面结构的力学行为进行分析.结果显示:倒装式基层沥青路面结构面层的底面受拉应力作用,随着轴载的增大,拉应力近似呈线性递增;倒装式基层沥青路面结构的底面拉应力明显小于典型半刚性基层沥青路面结构的底面拉应力,因而具有更好的抗裂性;级配碎石层底面始终处于受压状态.

The finite element method was used to analyze the mechanical behavior of structure with an inverted base layer. Results show that the tensile stress takes effect at asphalt pavement the bottom of surface layer for inverted base layer structure and with increase in load, the stress becomes linear increase ap- proximately. The tensile stress at the bottom of base layer for inverted base layer structure is much smaller than that for typical semi-rigid base layer structure, that means the inverted base layer structure has a better crack resistance than typical semi-rigid base layer structure. Pressure stress always takes effect at the bottom of macadam layer.