Abstract: Many constructions that are being constructed at present tend to wind-sensitive because of their shapes, slenderness, flexibility, size and lightness. This leads to demands for economical wind resistant designs. In the designs of high-rise buildings, lateral loads like wind and earthquake forces play a significant role in the stability of the structure for. In the present study only wind effects on tall buildings are studied. Wind loading on the basis of wind tunnel tests is carried out on square shaped building model with uniform cross-section along the height given for different building models. In present study, square shape is considered. The present study is carried out under two major heads namely: (i) Experimental study and (ii) Response study.
In the experimental study, the rigid model of the tall buildings with square is tested in boundary layer wind tunnel in order to find mean and fluctuating pressures at various points in different surfaces. Square shape models are tested in open circuit wind tunnel in which small blocks are used as the obstruction to meet the wind tunnel simulation requirement and for the development of turbulent flow for generating the atmospheric surface layer in the 2mX2m cross section at wind tunnel. The effects of shape of the building model on the wind pressures distribution are also discussed. The second part of the present study is to carry out study to obtain response of the building having square shape by using wind loads obtained experimentally in part one. Prototype buildings are assumed to be made of RCC beams and columns with grid size 20mX20m and story height 3.75m (ground floor) and 3.125m (remaining 18 floors).
The buildings are analyses by readily available software package STAADPRO. Mean response including moment about axis, shear force, twisting moment and displacement are obtained under wind incidence angle in order to study the effects of square shape under wind loads.
Keywords: RCC, STAADPRO.
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DOI:
10.17148/IJARCCE.2022.111242
