Wind load Optimisation by Aerodynamic Mitigation Techniques for Tall Buildings – A Review

Abstract

The modern age tall buildings are extremely susceptible to dynamic wind loads that severely
affect serviceability. These super tall structures are man-made bluff-bodies. The wind-induced excitations
due to the building shapes bluffness cannot be neglected for a bluff body. For a typical tall building with
an increase in height and flexibility, the building behaves adversely under wind loading. Tall buildings
are prone to vibration due to wind action, which translates to building motion. Aerodynamic mitigation at
the design stage could significantly control the adverse reaction of tall buildings under wind loads. The
aerodynamic mitigation techniques are very efficient in controlling vortex shedding and wake region flow
characteristics. This paper explores the aerodynamic modification mitigation approaches in practice and
discusses the efficiency of each approach. This paper reviews major and minor aerodynamic modification
techniques to curb wind loads employing geometrical modification over a brief period.