The main Firemen Station of Naples is a steel-concrete composite building structure, that is peculiar due to its suspended configuration and to the seismic devices installed at the time of construction. The latters represents one of the first Italian applications of vibration control systems and the as-sessment of seismic performance according to current codes is strongly needed. The installation of a static and dynamic monitoring system of the structure and the performing of a rising test of one seismic bearing could al-low to better understand the structural behaviour and to determine the best choice of seismic retrofit intervention of the building. A simplified structural model is developed to be used for predicting and evaluating the experimental results of dynamic shaking tests with vibrodine.