Le potenzialità della “FNA” nell’analisi dinamica non lineare di strutture dotate di sistemi avanzati di protezione sismica

This paper presents the basic concepts and the analytical formulation of the “FNA” (Fast Nonlinear Analysis) method for the solution of dynamic computational problems with a small number of nonlinear elements, as in the case of building structures incorporating special seismic protection technologies. The method is then applied to an experimental single-story steel frame and a multi-story reinforced concrete frame building, both equipped with dissipative braces incorporating “ADAS” or fluid-viscous devices. The results of these applications are finally compared to the ones of the same analyses carried out by a step-by-step integration method.