Analysis of Wind Effects on Tall Buildings of Irregular Cross-Sections Using Numerical Simulation

Abstract

The number of buildings built increased as the population grew, which in turn reduced the amount of available land. As a result of this more and more high-rise structures are being constructed to meet the existing demands. These high-rise structures are more vulnerable than a low-rise structure to dynamic loadings like wind load and earthquake load. The wind loads are such that, its effect increases as height increases. This study uses numerical simulations to examine the impact of wind load on high-rise structures with two alternative "Fish" shapes- Model 1 (S-1) and Model 2 (S-2). CFD simulation software ANSYS is used here. Both the shapes are analysed in isolated condition. Angles of wind incidence ranges from 0° to 180°. The scale used here is 1:100. The coefficient of pressure at different wind incidence angles and velocity streamlines of both models are found in the result part. Both the model shows almost similar variation in Cp in majority of faces under different wind incidence angles. Model 2 exhibited better streamline pattern at every angles.