Aerodynamic performance of CAARC standard tall building model by various corner chamfers

This paper takes CAARC standard tall building as example to investigate the effects of corner chamfers on the aerodynamic performance of tall buildings. Five rigid tall building models including CAARC standard tall building as benchmark model and four corner chamfered models with different modification rates from 5% to 20% are tested for pressure measurements in a boundary layer wind tunnel. Based on the experimental results, wind pressure coefficients, local wind force coefficients, base moment coefficients and their power spectral densities from the five models are compared and discussed. The results show that the aerodynamic performance of the tall building models can be effectively improved as the corner chamfer rate increases. The correlation factors for base moment coefficients and power spectral densities are proposed to assess the aerodynamic performance improvement. This paper aims to provide useful information for the wind-resistant optimal design of rectangular tall buildings.