Abstract：Submodeling method is presented to compute the stress and deformation of concrete face slab by considering the construction characteristics of concrete-faced rockfill dam and concrete face slab constructed with different stages. A contact friction element without thickness based on Mohr-Coulomb friction model is used to simulate the special boundary between the concrete crushing-type side wall and the concrete face slab. The concrete face slab，concrete crushing-type side wall and toe board are looked as submodel，which is separated from the whole model of CFRD. The calculated displacement in the whole model is applied to the bottom side of the crushing-type side wall，and the water pressure is applied to the surface of the concrete face slab. The advantage of submodeling method is that the construction procedure of cutting and filling of slope can be considered accurately in analysis，which is an essential condition to the simulation of the stress and deformation of concrete face slab. The size of submodel is relatively small，so the concrete face slab can adopt dense mesh to simulate steep stress distribution along thickness，and complex nonlinear constitutive relationship and cracking rule are also employed to simulate stress and deformation of concrete face slab under the transient temperature loading. In addition，the vertical joint and peripheral joint of the concrete face slab are also simulated. The analytical results show that the submodeling method based on contact friction element to compute the stress and deformation of the concrete face slab is feasible.
