La nuova mappa dei venti estremi italiani

Recovering and extending a series of previous researches, this paper proposes a map of Italian extreme winds assigning the reference velocity, i.e. the wind velocity averaged over 10 minutes, at 10 m height, in a flat open terrain, with 50 years mean return period, depending on the site and the altitude. Furthermore, an objective criterion is formulated by which the actual values of the local wind velocity are given as a function of the reference velocity. The study has been carried out within the activities asked by the Central Technical Service of the Superior Council of the Ministry of Works in view of the revision of the Ministerial Decree dealing with safety and loads and of the introduction of the aeolic Italian map into Eurocode 1. The conclusions discuss some critical observations concerning the design implications that the proposed map could produce.