Couple-Field Analysis of Steel Chimney

Chimneys are required to carry vertically and discharge, gaseous products of combustion, chemical waste gases, and exhaust air from an industry to the atmosphere. Chimneys are tall structures and the major loads acting on these are self-weight of the structure, wind load, imposed load due to lining and other mountings, thermal load, earthquake load. In this paper a steel chimney will be designed considering dead load and wind load. The Bureau of Indian Standards (BIS) design codes procedures will be used for the design of the chimney. The chimney was considered as a cantilever beam with annular cross section. A simplified model of chimneys with various thicknesses like 6mm, 8mm, 10mm, and 12mm were modelled and analyzed using ANSYS and found that the chimney is more stable at the lower thickness of 6mm, so the chimney can be made cost effective at the lower thickness. In this paper the coupled-field analysis (thermal stress calculations) of the steel chimney with 6mm thickness was carried out and checks whether the stress distribution of the model exceeds the yield strength of the material or not.