OPTIMAL LOCATION OF STEEL OUTRIGGER BRACING SYSTEM FOR TALL BUILDING

The advancements in engineering and technology, development of high strength structural materials, rise in population and lack of land area available due to the raise in land prices and rapid urbanization have led to the development of high rise buildings in the modern era. The tall buildings are the most susceptible to the lateral loadings due to the wind and seismic forces. The trend of taller and slender structures makes it necessary to develop the structural configuration which can resist the lateral loads effectively with minimum cost. The outrigger bracing system provides the solution to control excessive drift and displacement in such buildings. In this study, the conventional structural model having the central core of reinforced cement concrete and the models with outrigger at different heights of the building are modeled for the 20, 40 and 60 storey building heights. The aim of this paper is to suggest a suitable location of outrigger bracing system to control excessive top storey displacement