Attenuation of the unsteady loading on a high-rise building using feedback control

The unsteady wind loading on high-rise buildings has the potential to influence strongly their structural performance in terms of serviceability, habitability and occupant comfort. This paper investigates numerically flow structures around a canonical building immersed an atmospheric boundary layer, using wall-resolved large eddy simulations. switching between two vortex shedding modes is explored, layer suppressing symmetric identified. It shown that antisymmetric mode prevalent near wake behind building, with strong coherence periodic fluctuations side force demonstrated. Two feedback control strategies, exploiting this idea, are designed alleviate aerodynamic side-force fluctuations, pressure sensing just single wall. sensor response synthetic jet actuation along ‘leading edges’ characterised system identification. Both linear controller least mean square adaptive attenuate successfully when implemented exhibits better performance, its effect field delay formation dominant vortices increase extent recirculation region. Feedback requires smaller area then comparable achieved attenuation loading. study could motivate future attempts understand exposed oncoming variations.