Characteristic velocity of strong wind for wind engineering purposes
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Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland
Poznan University of Technology, Piotrowo 5, 60-965 Poznan, Poland
Firelab, Pretoria, South Africa
Building Research Institute, Filtrowa 1, 00-611 Warszawa, Poland
Building Research Institute, 00-611Warszawa, Poland
Submission date: 2023-03-10
Final revision date: 2023-05-15
Acceptance date: 2023-05-23
Publication date: 2023-09-18
Archives of Civil Engineering 2023;3(3)
Eurocode standard recommends using fundamental basic wind velocity (characteristic velocity) as the design value in civil engineering. There are different approaches to estimate this value depending on the climate features of the given area and the quality of environmental data. The estimation of the characteristic value requires statistical analysis of historical data regarding wind velocities measured throughout the country at meteorological stations. The results of the analysis are probability density distributions of this random variable for each meteorological station. On this basis, values of characteristic wind velocity with a mean return period of 50 years are determined. The zones with uniform velocities are delineated on the map of the country. In the case of Poland the last evaluation of wind zones took place over 15 years ago. Higher quality of measurement data on the one hand, and the introduction of the second generation of Eurocode standards on the other hand, create a need to check and update these zones. This work presents theoretical basis for the estimation of characteristic values of random variables in the context of wind velocity, comprehensively reviews practical methods used for this purpose and summarizes current situation in Poland, finally discusses the issues related to the heterogeneity of wind data, illustrating them with an example.
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