Wind Pressure Characteristics of the Roof of Jining North Railway Station Under Downburst
Downbursts are extremely destructive weather events that can cause massive damage to build-ings.In order to investigate the influence of downburst on the roof of long-span structures,CFD was used to conduct numerical simulations,and Jining North Railway Station was taken as the prototype to explore the influence of wind angle,radial distance,and moving speed of cloud layer on the roof wind pressure.The results showed that,the upper roof of Jining North Railway Station was under negative wind pressure affect-ed by the action of downburst,and the maximum negative wind pressure occurred in the windward area of the roof.The maximum wind pressure appeared at the front edge of the roof when the wind angle was 0°,and its maximum negative wind pressure coefficient could reach about-2.5.The maximum negative wind pressure of the roof of Jining North Railway Station occurred near the radial distance of 1.25Djet,and the leeward area of the upper roof was less affected by the radial distance.The movement of the jet enhanced the negative wind pressure at the windward area of the roof.
downburstwind pressure characteristicsJining North Railway Stationwind angleradial dis-tance
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