DYNAMIC BEHAVIOUR OF TALL CHIMNEYS

Babu, B. Jose Ravindraraj, R. Ram Kumar, R. Saranya

Abstract: Chimneys are very important structures for the emission of poisonous gases in power plants. After realising the urgent need to restrict the pollution levels, chimney height is being rapidly increased. So most of the chimneys are tall slender structures which fail due to wind excitation The present study discusses the dynamic behaviour of tall chimneys. Reinforced concrete chimney of 275m high, which is located in warora, Maharastra is taken for the present study. The objective of this project is to study the change in the stress pattern due to presence of flue holes and also to carry out the influence of along wind and across wind effects on the height of chimney for different wind speed and location. The analyse of chimney is carried out by developing a three dimensional model created with plate elements using STADD Pro. The stress concentrations in the flue duct in the chimney have been studied.

Keywords: Tall Slender, Warora, Maharastra, Flue Holes, STADD Pro, Stress Concentration.

DOI: https://doi.org/10.15623/ijret.2016.0503055