Extreme wind speeds analysis using extended wind rose based on statistic methods

The extreme wind speed is a big problem in the design of buildings and structures, especially for unique building and structures. But modern Russian building codes prescribe taking into account regular winds only. Meanwhile, exactly extreme wind speed cost the most damage to constructions. The paper offers a statistic extreme wind speed analyses with Methodology for testing the statistical significance between different wind speeds and directions. At the first step the presence of a relationship between extreme wind speeds and directions is investigated based on the chi-square statistic. If there is this type of correlation, the extended wind rose for the extreme wind speed is being built. Two examples of using this technique for two different Russian regions (Moscow were extreme wind speeds are rare, and Far East of Russia were extreme wind speed are regular). The recommendation for building stage at this regions was given.