In the numerical analysis of engineering problems, it is often necessary to properly model the behavior and effects of discontinuities and interfaces. The parameters of the experimental and analytical programs were the concrete compressive strength and shear span-depth ratio. Discrete and smeared ways of analysis of the bond link element were used. Effort has been given using non-linear 3D FEM program to predict the punching shear failure mechanism and the crack pattern of open sandwich slabs. Based on the analytical