Abstract
The presented contribution deals with evaluation of wind loads on various layouts of plastic and steel mesh fabric. To obtain real wind effects and loads, the experimental measurement in the Boundary Layer Wind Tunnel (BLWT) in Bratislava has been prepared. The goal of an investigation is the determination of wind loads on permeable materials – plastic and steel fabric, using wind load reduction factor k. The mean wind pressure on the permeable material is obtained by multiplying the wind pressure to the impermeable surface by the reduction factor k depending on the Reynolds number. The experimentally determined reduction factor can be applied for design of the safety mesh fabric. Wind loads were obtained from measurement of wind velocity by Hot-Wire anemometry (HWA).
Highlights
Wind effects and wind loads on the structures are given by EN 1991-1-4 [1] and by the National Annex EN 1991-1-4/NA for particular country, taking into account the meteorological conditions of the respective country and the locality where the objects are located
The wind load reduction factor k was determined for individual permeable materials as the mean wind pressure obtained by experimental measurements on the models divided by the mean wind pressure on full wall: k where k is the reduction factor [–], q is the mean wind pressure on measured area behind perforated model, q, is the mean wind pressure on full wall according to Eq (3)
On the basis of the experimental measurements evaluated and given that the materials will be used on high-rise buildings where higher wind speeds are assumed, we recommend the following values of the reduction coefficients k of mean wind load:
Summary
Wind effects and wind loads on the structures are given by EN 1991-1-4 [1] and by the National Annex EN 1991-1-4/NA for particular country, taking into account the meteorological conditions of the respective country and the locality where the objects are located. It takes into account a specific windy situation in every territory. Wind pressure coefficients for atypical shapes and materials depend on solidity ratio φ. The wind pressure distribution on these structures can be obtained by experimental measurements in the wind tunnel
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