A Study of Wind Pressure on Tall Buildings and Its Aerodynamic Modifications against Wind Excitation

  Shyam Baby,  Jithin P N,  Anna M Thomas

Bluff body aerodynamics plays a critical role in the determination of the principal response of a high-rise building. Tall buildings can be susceptible to excessive motion during wind events that can cause occupant discomfort and reduce the overall appeal of the structure. Furthermore, these excessive motions can create high base loads, which can increase the cost of the structure. Structural engineers generally opt for optimizing the structural system or increasing modal mass to reduce wind-induced motion .This paper presents an overview of a proposed tall building design platform that has the aim of determining the optimal external shape and structural system for tall buildings subject to aerodynamic loads. The platform is intended to bridge the gap between the traditionally manual conceptual design stage and the more automated detailed design stage in an attempt to define a new generation of innovative tall buildings. The project work deals with the analysis of tall buildings with ANSYS Computational Fluid Dynamics (CFD). The model provided by ANSYS is used to find the behavior of building when subjected to wind load. A comparison is made between the effect of building shape on the wind-induced response of a structure through a comprehensive investigation of the building of different cross section based on the CFD results. Finally, the significance of aerodynamic modifications against wind excitation, which include modifications of building’s cross-sectional shape and its corner geometry, sculptured building tops, vertical openings through-building, are done.

Keywords- Tall Building, shape effects, Finite Volume Analysis, Drag Coefficients, ANSYS, Computational Fluid Dynamics (CFD), Shape optimization of building ,Aerodynamic Modifications, Corner modification

Unique Identification Number - IJEDR1504003
Page Number(s) - 1-10
Pubished in - Volume 3 | Issue 4 | October 2015
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Shyam Baby,  Jithin P N,  Anna M Thomas,   "A Study of Wind Pressure on Tall Buildings and Its Aerodynamic Modifications against Wind Excitation", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.3, Issue 4, pp.1-10, October 2015, Available at :http://www.ijedr.org/papers/IJEDR1504003.pdf