Abstract
The increase in the population is at an exponential rate, and the available land is in the form of irregular shapes. That is why irregular shapes are very commonly built. Wind load increases with respect to height, so wind load evolution is necessary for such high-rise structures. Wind forces majorly depend on the plan's cross-sectional shape. Therefore, for an irregular shape, an investigation is needed for tall buildings. This paper demonstrates a detailed study on velocity stream line, external pressure coefficients, pressure distribution on the surfaces of the building and the turbulence kinetic energy for the Y-shaped plan for tall buildings under wind excitation for wind incidence angles of 0o to 180o. k- turbulence model is utilized to solve the problem using computational fluid dynamics techniques in ANSYS for terrain category II as per IS: 875 (Part3), 2015. Wind ward faces in all building models show positive pressure distribution, while the leeward faces are under the effect of negative pressure distribution. Wind load can be reduced on building models by modifying the corners, such as chamfering, rounding, and double recessed. The variation of pressure distribution on different faces of a "Y" plan shaped tall building for 0° and 180° is investigated using ANSYS CFX, and the pressure contours are plotted for all the faces of different "Y" shaped buildings to compute the effect of corner modification on pressure distribution. In this research, it was found that building models with rounded corners are highly efficient in resisting the wind load. Doi: 10.28991/CEJ-2022-08-02-06 Full Text: PDF
Highlights
At present times, due to urbanization, the available land area is not expanding while the population is growing at an exponential rate, in urban areas
This paper focuses on the variation of pressure coefficients at various faces of a "Y" plan shape building and evaluates the wind flow pattern around the building model
The Domain i.e., the virtual wind tunnel environment, is set up according to Franke et al (2007) [28] guidelines, which state that the inlet and side wall of the domain are at 5H and the outlet is at 15H from the building location, while the top is at 6H from the ground, where H is the height of the building model
Summary
Due to urbanization, the available land area is not expanding while the population is growing at an exponential rate, in urban areas. Verma et al (2015) [5] studied the variation of wind pressure on different surfaces of an Octagonal shaped building using ANSYS Fluent for different wind incidence angles of 0o to 30 o at an interval of 15o and a comparison of numerical results with experimental data was presented in both isolated as well as interference conditions. Kumar and Raj (2021) [25] numerically investigated the pressure distribution on an irregular octagonal plan oval shape building model and a detailed analysis of wind effects is provided in the form of pressure contours. Pal and Raj (2021) [27] evaluated the wind induced interference effects on square and fish plan shape building model under various interference conditions and the experiment were carried out in boundary layer wind tunnel test at a length scale of 1:300.
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