Naslov
Wind barriers on bridges: Effects of wind incidence angle on flow field characteristics

Autori
Kozmar, Hrvoje ; Procino, Lorenzo ; Bartoli, Gianni ; Borsani, Alessandra

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of Seventh Asia-Pacific Conference on Wind Engineering (APCWE-VII) / - Taipei, 2009

Skup
Seventh Asia-Pacific Conference on Wind Engineering (APCWE-VII)

Mjesto i datum
Taipei, Tajvan, 08.11.2009. - 12.11.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bridge; wind barrier; flow field characteristics; wind tunnel tests

Sažetak
Aerodynamic characteristics of wind barriers on two Croatian viaducts were experimentally studied in the CRIACIV boundary layer wind tunnel. Effects of wind incidence angle on flow field characteristics behind the wind barrier were reported. Mean velocity fields and vorticity fields were determined using the Particle Image Velocimetry (PIV). Freestream velocities were measured using the hot-wire velocimetry and the Pitot tube. Results indicate a possibility of wind-induced instability of high-sided vehicles at larger vertical incidence angles, especially in the traffic lane close to trailing edge of the bridge, as velocity fluctuations and mean freestream velocities approach the road surface when increasing the vertical incidence angle. Removing elements from the wind barrier can result in very large local velocities immediately downstream from the barrier. Variations in horizontal incidence angle do not seem to affect flow field characteristics significantly.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Građevinarstvo, Tehnologija prometa i transport

POVEZANOST RADA