Abstract: This paper addresses the evaluation of the dependence of bridge-deck flutter derivatives to the extraction parameters used in wind tunnel tests. The studied parameters are the model scale, model velocity and amplitude of motion. The measurements of flutter derivatives for the Great Belt Bridge were done through forced-vibration tests. This research shows that the flutter derivatives measured for different model scales have similar trends. Some derivatives show a dependence with respect to the amplitude. When studied in their dimensional form, the flutter derivatives H*5, A*5, H*2 and A*2 exhibit nonlinearities for the velocity. Therefore, the study of a new nondimensionalization for the flutter derivatives based on the velocity would be interesting for the development of a new time-domain formulation of self-excited forces.