COMPARISON BETWEEN ANALYTICAL METHODOLOGIES OF WIND STANDARDS AND A WIND TUNNEL TEST

Abstract

In Cuba, the construction of slender buildings for the hotel industry has increased, and this has made it necessary to deepen the dynamic analysis of these structures. The dynamic analysis of tall buildings in the face of the effects of the wind is a complex problem, which is why several investigations have been motivated, especially when the buildings are inserted in a built environment that can cause phenomena such as aerodynamic interference. The main objective of this work is: to compare the longitudinal wind forces of an experimental test in a wind tunnel and those calculated analytically taking into account the interference factor by various international standards: Indian standard (IWC), Eurocode (EN1991-1-4), Brazilian (NBR6123) and Australian (AS / NZS1170.2-2011) in a tall building. In addition, the effects and modifications in the horizontal forces in several neighboring low buildings with the presence of the new tall building project were analyzed. In the analysis of the longitudinal equivalent static forces, the calculation methods proposed by the Eurocode (EN1991-1-4) were used. The results of the analysis showed that the equivalent static horizontal forces at the base for the 90 degree direction, by the methodology used in the Eurocode standard (EN1991-1-4) in relation to the wind tunnel was 2.5 times lower,  mainly due to the shielding effect that a tall building creates over the new tall building.