SOME INTERESTING DESIGN ASPECTS FOR TALL RC CHIMNEYS AND BUILDINGS

S. N. Manohar

Abstract: In recent decades, the heights of industrial chimneys and urban residential buildings have increased rapidly. Primarily, the former can be attributed to the need to effectively disperse ever increasing volume of pollutants under stricter pollution norms and the latter because of the steep increase in footprint land costs. As a parallel development, the increase in quality and strength of concrete has led to reduction in member sizes and thereby an increase in slenderness of these structures. While there are important differences between the behaviour of these two types of slender structures, there are also some similarities. This paper emphasizes the behaviour of tall slender chimney structures and presents the impact of dynamic wind effects and enhancement caused by correlation of wind forces due to small protrusions over the chimney height. This paper describes the manner of reducing the dynamic effect of wind on chimneys and how similar effect can be achieved for buildings with the help of architectural features.

Keywords: Chimney, Dynamic Effects, Pollution Dispersion, Tall Chimneys, Turbulence

DOI: https://doi.org/10.15623/ijret.2016.0532013