Investigation of wind effects on star shape building model

Abstract

Building construction in India has been on rise since last two decades. More recently construction of tall buildings ranging from 10 to 50 stories have been proposed in many cities. For these buildings, wind analysis is as important as earthquake analysis, since in taller buildings, wind loads are dominant than earthquake loads at greater heights. There is a rising demand for tall structures to fulfil the occupancy requirements in congested metropolitan areas. In India, wind analysis is done according to IS 875(Part III):2015. generally engineers rely on wind tunnel experiments to understand the behaviour of winds on structures. However, for arriving at the best orientation several tests have to be conducted which is a tedious job. In this project, a necessity to adopt a different approach such as Computational Fluid Dynamics (CFD) simulation is proposed. The objective of this project is to study the effect of wind on a statement design model which is computed using AutoCAD 3D and ANSYS CFX (using CFD methodology). The modelling of building is done on AutoCAD (3D Modelling) software. The building is consisting of two cross – sections – square (at the lower portion) and plus (in the upper portion) of the building. Various contours and streamlines and their interpretation are discussed in detail.