Non-Linear Seismic Analysis of Reinforced Concrete Chimney

International Journal of Civil Engineering

© 2016 by SSRG - IJCE Journal

Volume 3 Issue 8

Year of Publication : 2016

Authors : Remyasree A R, Megha Vijayan

10.14445/23488352/IJCE-V3I8P103

How to Cite?

Remyasree A R, Megha Vijayan, "Non-Linear Seismic Analysis of Reinforced Concrete Chimney," SSRG International Journal of Civil Engineering, vol. 3,  no. 8, pp. 13-17, 2016. Crossref, https://doi.org/10.14445/23488352/IJCE-V3I8P103

Abstract:

The chimney is a system for venting hot flue gases or smoke from a boiler or furnace to the outside atmosphere. They are typically almost vertical to ensure that the hot flue gases flow smoothly, drawing air into the combustion through the chimney effect. It is essential to determine the wind, seismic and temperature demands of chimney structures to prevent structural problems which lead to collapse of the structure. This study focused the effect of wind load, earthquake load as well as temperature effects on reinforced concrete (RC) chimneys. Wind analysis was carried out by along wind effects by using the Simplified method and seismic analysis by time history analysis for different heights varying from 275m to 400m with three different radius-thickness ratios and for different longitudinal sections such as tapered and partially tapered by using the software SAP2000v14. Analyses were conducted to study the variation of displacement and shell stress for the wind analysis, peak displacement for the seismic analysis and temperature effects. The results indicated that as the radius-thickness ratio increases the displacement values were decreasing. The RC chimney with more height and the partially tapered section will be critical compared to fully tapered chimney for the wind, seismic and temperature effects and fully tapered chimney structure exhibiting minimum displacement.

Keywords:

RC Chimney, Wind Analysis, Seismic Analysis, Temperature effects and SAP2000v14.

References:

[1] B S K Reddy and Srikanth, ―Study of wind load effects on tall RC chimneys, International Journal of Advanced Engineering Technology, June 2012
[2] CED 38(7892), ―Draft Indian Standard Code of Practice for Reinforced Concrete Chimneys, WC April 2013
[3] IS 1893 (Part1):2002 ―Criteria for Earthquake Resistant Design of Structures Bureau of Indian standards, New Delhi.
[4] IS 4998 (Part1):1992―Criteria for the design of reinforced concrete chimneys Second revision, Bureau of Indian standards, New Delhi
[5] IS 875 (Part3):1987, ―Indian Standard Code of Practice for Design Loads for Buildings and Structures, wind loads, BIS, New Delhi
[6] John L Wilson, ―Earthquake response of tall reinforced concrete chimneys Engineering Structures ,June 2003
[7] K R C Reddy, O R Jaiswal and P N Godbole, ―Wind and Earthquake Analysis of Tall RC Chimney, International Journal of Earth Sciences and Engineering (ISSN) Vol. 4, October - 2011
[8] Lokeshwaran N and G A M Pandian, ―Effect of Dynamics Loads on Tall RCC Chimneys of Different Heights with Elliptical and Circular Cross sections, IOSR Journal of Mechanical and Civil Engineering,August 2014
[9] M G Shaikh and Khan,―Governing Loads for Design of A tall RCC Chimney, IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE),2009
[10] Rajkumar and V B Patil, ―Analysis of self supporting chimney, International Journal of Innovative Technology and Exploring Engineering, October 2013
[11] S K Duggal, ―Earthquake Resistant Design of Structures, Oxford University Press,2007
[12] Shelly Thomas, Dr. Jaya V and Manju P M, ―Non-linear Analysis Of Reinforced Concrete Chimney, International Journal Of Civil Engineering And Technology (IJCIET) Volume 5, Issue 12, December 2014
[13] Suhee Kim and Hitoshi Shiohara, ―Dynamic response analysis of a tall RC chimney damaged during 2007