Evaluating the impact of wind effects on tall buildings with various plan shapes

Abstract

Tall building is playing important role in the growth of urbanization and has resulted in developing to the vertical rise of the structure. The data available for the designing of the tall building is not sufficient or need some modification up to very limited extent in the present scenario. In this study a rectangular shape having L: B ratio as 1.15 and octagonal plan shape are selected to investigate the wind loads on building. The area of both models is nearly equal for the comparison of the results. Pressure effects are the main concern of considered building model. When it comes to predicting wind-related events on buildings or other structures, computational fluid dynamics (CFD) is a reliable and quicker option. CFD analysis is carried out using a software program called (ANSYS-CFX). This paper presents pressure contours that are calculated at the front, back & adjacent sides of the individual tall buildings. The results clearly show that based upon the building shape, the pressures generated can be either positive pressure or negative which can be either beneficial or can have adverse effects. The result on both the building model shows that the pressure on wind ward face is more or less the same and it does not depend on the shape of the building. In the case of a symmetrical building, the leeward face will always be subjected to the suction effect, while the side faces will always exhibit an equal pressure distribution.