Wind-Induced Aerodynamic Effects on Multiple Side Setback Tall Buildings Using CFD Simulation

The present study considers different types of setback tall building models and compares the aerodynamic study with the 1:1:2 regular-shape tall building model. The setback height is considered at h/2, and 2h/3 levels from the base of the model. The setback distances are arranged on the single side, double side, and around the building at the considered h/2 and 2h/3 levels. This study was conducted by Computational Fluid Dynamics (CFD) method. The drag and lift coefficients of the building due to wind load are correlated. Power spectral density (PSD) at the top and setback roofs are also compared. Finally, this study concludes that the model has setbacks around the building efficiently reducing 89% torsional moment compared to the regular square shaped model. The reduced frequency decrease on the setback model has a setback around it. Finally, this study suggests that setback distance and increase of setback number around the model can easily handle the wind velocity and control the torsional moment due to wind.