Shape Effects of Wind Induced Response on Tall Buildings Using CFD

Sanket Lohade, Dr. Sanjay Kulkarni

High rise Structures are in demand due to scarcity of land in urban areas, economic growth, technological advancement, etc. Wind effect is very important for high rise structures and provides significant contribution to overall loading and serviceability. In order to provide design load and predict dynamic response, wind tunnel testing is an essential component in designing high rise building. As the wind tunnel testing is generally very expensive and time consuming, the use of CFD as an alternative to wind tunnel testing is studied. Different RCC buildings of varying shapes and aspect ratios are studied. An attempt is made to study the effect of different geometric configurations like flared, swastika, circular and tetragon of tall buildings having same plan area on Force coefficient. To study the wind effect, overturning moments, drag forces and torsional moments at base of the structures using Computational Fluid Dynamics(CFD) that is nothing but ANSYS FLUENT workbench. Then the numerical computation has been executed to validate the results of the same.