混凝土路面上沥青加铺层的半解析分析

Semi-Analytical Finite Element Analysis of Asphalt Overlay on Existing Concrete Pavements

本文通过建立半解析单元力学模型，计算分析了旧混凝土路面上沥青加铺层的三维荷载应力，探讨加铺层产生反射裂缝的机理，为合理地设计沥青加铺层提供理论依据和实用计算方法．

A mechanistic model with semi-analytical finite element is developed for analysing the deflections and stresses in asphalt overlay on existing concrete pavements. It is indicated that the 3-D semi-analytical solution shows the same deflection and stress paterns as those from the plane strain solution,but it has much lower magnitttdes, that means the 2-D solution highly overestimates the loading stresses in asphalt overlays. The impacts of thickness and stifflless of overlay, and the bonding condition between layers on loading, stresseg have also been discussed in this paper.