International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 01 | Jan 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 595 Analysis of Wind Load on Tall Building of Various Aspect Ratios Barkha Verma 1 , Bhavika Baghel 2 , Aditi Chakradhari 3 , Abhishek Agrawal 4, Prince Wanjari 5 1 B.E Assistant Professor, Department of Civil Engineering, SSIPMT College Raipur, Chhattisgarh, India 2,3,4,5 B.E Student, Department of Civil Engineering, SSIPMT College Raipur, Chhattisgarh, India ---------------------------------------------------------------------***---------------------------------------------------------------------- ABSTRACT - The rapid increase in the population in developing countries such as India has an acute shortage of land and space. To get rid of all these problems, people have resorted to multi-story or tall buildings both for commercial as well as for residential purposes. As the weight of the building increases wind flow is an important consideration for the designers. Tall building considering categories like relative height, proportion, and structural design. Under the Relative height categories, we call a building is tall depending upon the height relative to the surrounding structures. Most importantly from the structural design point of view, those buildings which are subjected to gravity loads are not considered as tall buildings only those which are additionally subjected to lateral loads like wind loads, etc. are referred to as tall buildings. But when we go higher wind excitation becomes one of the most precarious forces acting on the surface of the structure and if the plan geometry is irregular Also direction of wind plays a very vital role in the behavior of the structure. In this Research paper, we study the various types of the spect ratios of the building and the effect of wind forces on the building and also we study about, four-building models having different Horizontal Aspect ratios viz. 1, 2.25, 4 & 9 and height of the building is 96m. Key Words: Aspect Ratio, Horizontal Aspect Ratio, Wind Load, Tall Building, Wind Pressure 1. INTRODUCTION The major effects of wind on buildings can be generalized to some degree because of the bracketed range of characteristics that coverall conditions in shape, resulting in various aerodynamic responses. Some buildings have stiff structures, resulting in a limited range of variations of the structure. The wind being fluid is composed of circular eddies of varying sizes and rotational characteristics. These eddies give gusty or turbulent character to the wind which causes a significant effect on the object that comes in its way. The building surface resists the flow of the fluid over them. The fluid exits reaction force on the building which is called drag. The wind also creates vortex shedding in the building in the opposite direction of the wind flow which creates and tremendous load on the building and it differs with the shape of the body that the fluid encounters. The Reynolds number for when having turbulent flow characteristics will be approximately around this value and we know for the same fluid velocity of the drag, or the resistance is much higher in the non-streamlined body shapes like cubes and cylinders. Thus, while designing tall structures engineers take into consideration the shape of the building and for a few shapes having lesser Drag coefficient. The Tall building RCC structures’ construction, high-speed wind forces are known to be causing vibrations and oscillations in the structures. All structures undergo several shape changes under loading. 1.1 ASPECT RATIO Aspect ratios are of two types of horizontal aspect ratio and vertical aspect ratio. In our research paper, we work on the horizontal aspect ratio. Horizontal aspect ratio is the ratio of L/B which is length L to the base B. The horizontal Aspect Ratio is also called the plan aspect ratio. Fig 1.1.1 horizontal aspect ratio 1.2 OBJECTIVES  To study the behavior of tall high-rise buildings which is subjected to wind loads.  To study the effect of the shape of the building in the plan on the behavior of the structure.  To study the various aspect ratio of the building of the same area.  To determine the effect of wind force on various parameters like maximum displacements, maximum story drift, shear force, a bending moment in the building.  To define the best suitable Aspect ratio in tall buildings that can provide sound wind loading by observing the comparative studies.  To make high rise structure in Software which is used for the structural design called ETABS.