Paper considers maximum annual values of mean wind velocity in all plain, piedmont and seaside regions of Krasnodar Krai for more than 60-year period of monitoring. Substantial areal differencies of trends of wind velocities change are revealed in north-east, seaside and central zones. Simultaneous analysis of time series of vane and anemometric measurements of mean wind velocities over 1965-2012 allowed to reveal a period of significant increase of wind velocities up to 1977 and detect a gradual decrease of velocities in 1979-2012. Significant areal differencies in wind velocity trends in north-east, seaside and central zones of region are shown. It is shown that time series of wind velocities used for SNKK 20-303-2002 allowed to develop a reliable base for wind loads which provides up to date an annual certainty level 0.98 adopted in the current version of building code SP 20.13330.2016 "Loads and actions".
Keywords: wind loads, actions, local building code, inversion criterion, trend significance, time series
Paper considers maximum annual values of mean wind velocity in all plain and piedmont regions of Krasnodar Krai, which served as the basis for design values of wind loads on buildings in local code SNKK “Loads and Actions. Snow Loads and Wind Actions”. Time series of anemometric measurements of wind velocities are analyzed from the beginning of 1970s to 2012 extended by 13 years as compared to the time series used for developing this code. For detecting the significance of the linear trend of wind velocity maximums inversion criterion was employed. Calculations were performed for the data of anemometric wind velocity measurements on 29 meteorological stations uniformly distributed over a territory of the region. They showed that significant trend of increase of wind velocity with the high level of statistical certainty 0,95 is present only in two cases. In half of the rest cases trend is descending, in another half trend is statistically insignificant as well as mostly descending. Average decrease of wind velocity is 30%.
Keywords: wind loads, actions, local building code, inversion criterion, trend significance, time series
The results of studies of the dependence of the snow load and its security on the altitude above the sea level are presented on the basis of statistical data on the distribution of annual maximums of snow water equivalent obtained at 30 meteorological stations and mountain snow-measuring routes of the Krasnodar region and Adygea. Calculated relations are proposed for determining snow loads with arbitrary periods of one-time exceedance in the flat and mountain zones with altitudes up to 2000 m above sea level.
Keywords: snow load, security, distribution, annual maximums, mean recurrence interval, altitude above sea level