Technical Session 3:

Title:          Wind Pressure Distribution on Tall Buildings - An Experimental Study
Authors:     Malini S. P., Chinmayi H. K.
Abstract:   With increase in population and the rise in urbanization, there is a need for vertical expansion. In the design of tall buildings, wind loads along with vertical loads are very essential as the slenderness increases. This paper tries to understand the real time wind pressure distribution on the structure by conducting, wind tunnel experiment using scaled down (1:500) working model of G+80 storey square plan building of height 240m and area 40mx40m.Varying wind speeds of 33m/s and 44m/s with a wind incidence of 0 0 is employed in the study to determine the wind pressure distribution on the structure. From the study, it is observed that the positive pressure and negative pressure created on the windward side and leeward side of a building affect the drift and the vortex shedding phenomenon. It is also realized that, as the negative pressure created is of lower order there is no danger of vortex shedding failure.

Keywords: Tall building, Wind load, wind tunnel experiment, Pressure distribution, Vortex shedding phenomenon.
Pages:        070-075

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