Effect of Geometric Parameters on Seismic Performance of RC Chimneys

Volume 9 Issue 2 March - May 2019

Research Paper

Effect of Geometric Parameters on Seismic Performance of RC Chimneys

S. Isha Patel*, B. D. V. Chandra Mohan Rao**

* Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, Telangana, India.

** Professor, Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, Telangana, India.

Patel, S. I., & Rao, B. D. V. C. M. (2019). Effect of Geometric Parameters on Seismic Performance of RC Chimneys, i-manager's Journal on Civil Engineering, 9(2), 46-54. https://doi.org/10.26634/jce.9.2.16150

Abstract

Chimneys are the industrial structures, which are used to exhaust the gases generated during fuel combustion. As the seismic activity has been increasing day by day in the recent days, the analysis of the chimneys has been governed by the lateral loads such as wind and earthquake loads. In the present study, the seismic behaviour of tapered chimneys of different heights (50 m, 65 m, 75 m, and 100 m) with varying Height/ Bottom diameter ratio of the chimney (H/D ratios : 8,10,12,15, and 18) and varying Bottom diameter/ Bottom Shell thickness ratio of the chimney (D/T ratios : 10,15,20,25, and 30) has been investigated using SAP 2000 software. Free vibration analysis has been carried out to obtain the fundamental natural time period and mass participation ratios. Seismic analysis has been carried out using Response spectrum method as per IS 1893 (Part 4):2015. The effect of the geometric parameters of chimneys on dynamic response parameters such as Top displacement, Base shear have been evaluated and some useful conclusions are drawn.