Abstract: A finite element model for simulating the opening and closing of joints in jointed structures is presented in this paper. The initial pressure and resistance to the tensile strengh at the interface are considered. It can be formed easily and used widely.Some nonlinear finite element formulas are carried out, and corresponding nonlinear finite element programme is compiled. A contact problem of two contact blocks and nonlinear dynamic response of a plane arch are calculated, different jointed parameters, initial pressure and whether having joints or not between the structure and foundation are considered, Some conclusions are given.