Abstract :
This paper aims at addressing the variation of fundamental period when the ductility and the
damageability criteria varies. In order to investigate the influence of drift limitation on the fundamental period
of vibration a huge parametric study using modal dynamic analysis, composed of 144 designed cases of steel
moment resisting frames has been conducted. These are compared with the code prescribed fundamental period.
It is observed that as the drift limitation varies from the more relax to the most stringent the fundamental period
decreases and therefore the stiffness of the frame increases. The obtained period from the code are in the same
range to the one obtained from the modal analysis when the strict drift limit is employed in the design.
Keyword :
Fundamental period, Eurocode 8, Drift limitations, Moment resisting frames, Behaviour factor