Analysis on Mechanical Response for Three Kinds of Asphalt Pavement Under Discontinuous Interlayer Condition

Abstract

Semi-rigid asphalt pavement, compound base asphalt pavement and flexible base asphalt pavement are three main structures in China. Each asphalt pavement differs at the structure of base. In order to further analyze the stress characteristic, the paper took base as the starting point of study, set interlayer binding condition as not fully continuous and considered the horizontal load and vertical load under heavy load combining with our national, then made calculation in the full thickness range of pavement with the use of shell designing software Bisar3.0, so the worst distribution area for three kinds of asphalt pavement were obtained. The results showed that discontinuous interlayer binding condition made flexible strain and flexible stress show discontinuous distribution during structure height; the maximum flexible strain all appeared on the bottom of surface layer for three kinds of asphalt pavement, while the maximum flexible stress appeared in different structure layer; impose of double-double made shear stress on the surface of pavement stand greatly high degree; asphalt stabilized crushed stone of compound pavement must be designed to both anti-fatigue and anti-reflection crack; it’s suggested that designed indexes matching mechanical destroy mode should be chosen to guide pavement design.