WIND-INDUCED EFFECTS ON HIGH-RISE BUILDINGS WITH VARIED CROSS-SECTIONAL SHAPES

Abstract

High-rise structures are susceptible to dynamic wind effects, which can significantly impact their safety and serviceability. Predicting wind loads on tall buildings is a complex problem that involves numerous variables, such as wind speed, direction, turbulence, and the building's shape, size, and orientation. Additionally, interference effects between adjacent buildings can further complicate the problem. While some research efforts have been made to address this issue, there is still a lack of data available in international standards for predicting wind loads on complex building shapes and interference situations. This study focuses on the analysis of wind effects and interference on an asymmetrical building with varying dimensions but the same height and width of 60m. Using computational fluid dynamics (CFD) simulations in ANSYS CFX 2022 R2 and AutoCAD, we compute the wind effects for wind incidence angles ranging from 0 to 180 degrees with a 15-degree interval, using a mesh size of 0.005mm and 100 iterations. The Power Law equation is used to determine the wind speed profile within the atmospheric boundary layer. The pressure contours on the building's surface are analyzed to determine the pressure distribution, and we observe that the shape and size of the face are independent of the pressure distribution. We compare graphs of drag force, drag moment, lift force, and lift moment to identify critical faces for different wind incidence angles. The present study establishes blockage by placing twin-building models in various orientations at a distance of 10% of the model's height, i.e., 60 mm. The study provides valuable insights into dynamic wind effects and can inform the design of safe and efficient high-rise structures. This research project is crucial in helping architects and engineers better understand the dynamic wind effects on high-rise structures, which is an essential factor in designing safe and sustainable buildings. This study contributes to the field of wind engineering by providing a comprehensive analysis of the along-wind effects and interference on high-rise structures. The results can be used to improve the design of tall buildings, ensuring their safety and serviceability in the face of dynamic wind effects.