Aerodynamic Instability in Cluster Buildings

Abstract

With advancement in Building Construction Techniques and restriction of building construction to Limited area construction of tall building in a group so as to minimize the effect of wind turbulence and to get economical cluster to improve Aerodynamic performance of tall building. These above two requirements can be fulfilled with use of mass damper like Taipei 101 or with aerodynamically balanced structure like Burj Dubai. As the improvement has been made over aerodynamically designs like corner modification which has reduced formation of eddies and has reduced the effect of vortex shredding which are the main causes of wind induced oscillations where effects of corner cut, recession and roundness on aero-elastic instabilities such as vortex induced excitation and galloping oscillation were investigated by wind tunnel. Aerodynamic force measurements and wind pressure measurements were conducted for tall building models with various building shapes and the same height and volume. For comparison and discussion of the aerodynamic characteristics of tall buildings tests were performed and as results shows that, with change in direction of wind along with change of height of building surrounding high rise building can result into reduction of drag and drift increasing stability of high rise structure throughout