Evaluation of aerodynamic effects on a tall building with various cross-section shapes having equal area

Abstract

When wind hits a high-rise building, it has a big impact. Due to a lack of available land and an increase in population, the demand for high-rise buildings is growing daily. This necessitates the design of high-rise buildings with an effective wind load. Utilizing pressure and force coefficients, wind loads are calculated. There are numerous international standards that provide the coefficients for common regular shapes. However, in an expanding and competitive world, the architect seeks out complicated and unique building shapes that are aesthetically pleasing and able to endure wind loads that are applied to buildings. Our research focuses on determining how wind affects high-rise structures of seven different regular shapes that have the same base area and height. The ANSYS CFX for Computation Fluid Dynamics studies is used to compute the wind pressure on each face of building models. Scaled at 1:350, each building is represented as a model. For each face, the mean pressure coefficient CP is determined. Additionally, the wind flow pattern is also established using ANSYS CFX. Due to the direct head-on impact, pressure contours indicated positive pressure on the front or windward face. Faces turned sideways and backward displayed suction or negative pressure. On the reverse face, vortices were seen. According to the vertical flow pattern, the wind was blowing in two different directions: upward to a height of one-third of the building model from the top and downward to a height of two-thirds of the building model from the bottom.