Abstract
Wind load and response are the major factors that govern the most critical condition for designing tall buildings. This study discusses the variability of wind load and pressure on a Y plan shaped tall building due to the change in the building side ratio. The length to width ratio is changed keeping the total plan area same. The numerical study is done by ANSYS CFX. Two turbulence models, k-epsilon and shear stress transport (SST), are used for doing the numerical simulation and the results are compared with the previous wind tunnel results in a similar flow condition. Sample points were selected based on Audze–Eglais Uniform Latin Hypercube (AELH) method and the analytical expressions of force, moment and torsional coefficients of Y plan shaped tall building are proposed. These expressions are fitted very well and the AELH method has given a great set of sample points that have significantly decreased the total computational time. The graphical representations of these expressions for various coefficients are presented and discussed. Then pressure distributions on three different models are compared and the pros and cons of higher and lower values of side ratios are discussed.
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