In this work a non-linear cyclic modelling approach for moment resisting wooden frames is presented. In this kind of structures, steel tubes can be used to connect the column and the beam element, in this way achieving a semi-rigid connection characterized by high ductility. The experimental tests carried out at Delft University, in the Netherlands, on this type of joint have been modelled numerically with a non-linear, elasto-plastic rotational spring element. The properties of the spring have been calibrated on the experimental results by minimising the difference between experimental and numerical total energy values. The spring has then been used to model 2D wooden frames with different number of bays and storeys. The potentialities of this approach are presented, showing results from static and dynamic analyses including the evaluation of the behaviour factor. The developed model is of a great importance for a correct estimation of the seismic capacity and vulnerability of moment-resisting wooden frames.