Influence of Cross-Sectional Shapes on Wind Loads on Tall Buildings

Abstract

Present paper describes the details of the experimental study carried out on the models of tall buildings with varying cross-sectional shapes under both standalone condition as well as interference condition. Two cross-sectional shapes namely square and triangular are considered. Both force and pressure measurements are made on the models. Rigid models of tall buildings are made of timber for force measurement and of Perspex sheet for pressure measurement. The models are tested in an open circuit boundary layer wind tunnel. Twisting moment developed due to wind is measured in addition to base shear and base moment in along-wind direction as well as across-wind direction. Effect of wind incidence angle on wind loads is studied in case of isolated condition. In case of interference condition, effect of distance between object building and interfering building on wind loads is studied.