Effect of Turbulence Parameters on Alongwind Response of Tall Rectangular Buildings

Alongwind and acrosswind response of tall rectangular buildings have attracted the attention of researchers in the last 50 years or so resulting in many useful findings. In order to get a deeper insight into the phenomenon related to tall building aerodynamics, experimental investigations on the model of a 240 m high rectangular multi-storey building with plan dimensions [width (b) × depth (D)] 24 m × 48 m (b/D = 2.0) and H/√(bD) = 7.07 have been carried out to study its response in two types of terrains, viz. city outskirt (α  = 0.18) and city-centre (α = 0.30). The response of the model has also been studied in three grid generated flow conditions, to investigate the effect of ‘turbulence’ parameters. The results reported particularly bring out the effect of flow parameters like Turbulence Intensity ‘I_u’ and Integral Length Scale ‘L_ux’, on the building response.