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Bora wind load upon structures

Alica Bajić ; Državni hidrometeorološki zavod, Zagreb

Sažetak

Wind action, together with the earthquake action, represents dominant horizontal action on structures in his lifetime. Special significance of this action is that it is changing over time and its intensity varies depending on the meteorological characteristics of each area, and cannot be unified. In existing Eurocodes wind load calculation is based on the reference wind speed defined as a maximum 10-minutes average wind speed to be expected in a 50 years period. Wind with the reference wind speed results with so called static wind load. However, in 10 minutes wind speed varies significantly. That is particularly case during the severe and turbulent
bora wind. Due to its gusty character and extreme turbulence, estimates of wind load in the bora region have to include the dynamical wind load caused by bora turbulence. This is confirmed during the example situation of strong bora wind conditions by the values of the exposure coefficient of 4 times greater than the exposure coefficient obtained using only static wind load.

Ključne riječi

bora; turbulence intensity; dynamical load

Hrčak ID:

133920

URI

https://hrcak.srce.hr/133920

Datum izdavanja:

6.2.2015.

Podaci na drugim jezicima: hrvatski

Posjeta: 2.197 *