Analysis of Loading Stress of UTW

In this paper, loading stress of ultra-thin whitetopping (UTW) pavement is calculated with the finite element of three-dimensional isoparametric element. In the basis of these results, the effects of the interface conditions between whitetopping and existing AC, the thickness and the joint spacing of UTW, ratio of Ec/Es, and the existing AC on the stress are analyzed. Results indicated that the influence of the thickness is correlated with the joint spacing and the ratio Ec/Es. With the increasing of plane size and the ratio of Ec/Es, the influence is more evident. Keeping the interfaces continuous touchiness is favorable to reduce the loading stress of UTW. It is very important for the performance of UTW to ensure sufficient thickness and quality of AC.