Variação de pressão do vento em nova edificação considerando o efeito da vizinhança via software CFD

Abstract

In recent years, due to the verticalization of buildings become narrow and more flexible in constructions area has made the engineers fascinated in studying the structure area in study of the wind in civil construction. The evolution of materials, new forms and architectural proportions result in structures being subject to the dynamic actions of the wind. The taller the building, the more susceptible to action of the wind, however especially in the urban region where the building is found in the middle of many buildings could suffer from neighborhoods interference in which way may cause changing pressure to the nearby building. This present study analyzed neighborhood effect before and after the insertion of the building in the values of pressure and speed. Very first, presentation of normative methodology (NBR 6123/19) for the determination of forces due to wind in building; then, were addressed the theory of wind behavior once interact with the obstacles (building); subsequently, we slightly discussed about comparison between the use of wind tunnel and CFD about Experimental study of Wind Pressure Distribution on the High-Rise Building in the Shape of an Equilateral Acute Triangle; finally, analyzing two different scenarios, a zero-degree wind. The result obtained was presented in two and tridimensional in static pressure and speed profile form. The result of the simulation was compared to the values obtained as indicated by the NBR 6123/1988 standard. Finally, the results obtained with the CFD software proved to be reasonable compared approached the result calculated with the Ciclone.