ABSTRACT
Particular emphasis i s placed to the Eurocode approach which requires to introduce i n any case frame geometrical imperfections i n the analysis. Finally, i n order to evaluate, by means of numerical simulations, the e f f e c t s of these imperfections and therefore the magnitude which could be neglected and the interaction between frame and bar imperfections, some r e s u l t s already achieved i n t h i s f i e l d are presented.
