Enhancing wind resistance of super high-rise buildings: CFD-FSI coupled simulations and structural performance analysis

Abstract

This study investigates the aerodynamic optimization of super high-rise buildings using CFD and one-way fluid–structure interaction (FSI) simulations in ANSYS. Three building configurations square, helical square, and setback–helical were analyzed to assess the influence of geometric modification on velocity distribution, wake development, pressure coefficient, and structural response. The results show that the helical and setback–helical configurations reduce the surface-averaged pressure coefficient by 12.54% and 23.45%, respectively, compared with the square baseline. The structural analysis further indicates a reduction in the maximum stress response, confirming the beneficial effect of geometric modification on both aerodynamic and structural performance. These findings demonstrate that combined setback and helical strategies can significantly improve the wind resistance of super high-rise buildings. The setback–helical configuration also reduced the maximum equivalent structural stress by 37.74% compared with the square baseline, demonstrating its potential to improve structural safety and wind-resistant design.