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Thermal Analysis of 120m high RC Chimney

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2007
Grafar_Cetkovic_2007_K.pdf (5.063Mb)
Authors
Ćetković, Marina
Najdanović, Dušan
Conference object (Published version)
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Abstract
This paper deals with the thermal analysis of 120m high, RC chimney. The aim of the study is to find the distribution of internal forces caused by thermal loads, resulting from the difference among the ambient and the operating temperature. Namely, during the operating process, the higher temperature regime than those in the main design, has caused the thermo insulation damage, indicating the possible exceeding of ultimate strength in the concrete and reinforcement of chimney wall. It was assumed that temperature variation is uniform over the surface and linearly varying through the thickness of the chimney. Numerical analysis is performed using four-node shell element and the commercial program SAP2000. The finite element model is verified comparing the results of the thermal analysis with the available ones in the literature. The study shows that thermal radial forces and radial moments, obtained by the higher operating temperatures, are greater then the one in the original design. F...urthermore these forces can cause cracks in vertical direction, so appropriate retrofit measures are to be applied.

Keywords:
Reinforced concrete chimney / Thermal Analysis / Finite element model / Internal Forces / Numerical assessment
Source:
Proceedings of the 12-th International Symposium of MASE, Macedonia, 2007, 2007, 645-650
Publisher:
  • Macedonian Association of Structural Engineers, Faculty of Civil Engineering, Macedonia

ISBN: 9989-9785-1-7

[ Google Scholar ]
URI
http://grafar.grf.bg.ac.rs/handle/123456789/1897
Collections
  • Radovi istraživača / Researcher's publications
  • Катедра за техничку механику и теорију конструкција
Institution
GraFar
TY  - CONF
AU  - Ćetković, Marina
AU  - Najdanović, Dušan
PY  - 2007
UR  - http://grafar.grf.bg.ac.rs/handle/123456789/1897
AB  - This paper deals with the thermal analysis of 120m high, RC chimney. The aim of the study is to find the distribution of internal forces caused by thermal loads, resulting from the difference among the ambient and the operating temperature. Namely, during the operating process, the higher temperature regime than those in the main design, has caused the thermo insulation damage, indicating the possible exceeding of ultimate strength in the concrete and reinforcement of chimney wall. It was assumed that temperature variation is uniform over the surface and linearly varying through the thickness of the chimney. Numerical analysis is performed using four-node shell element and the commercial program SAP2000. The finite element model is verified comparing the results of the thermal analysis with the available ones in the literature. The study shows that thermal radial forces and radial moments, obtained by the higher operating temperatures, are greater then the one in the original design. Furthermore these forces can cause cracks in vertical direction, so appropriate retrofit measures are to be applied.
PB  - Macedonian Association of Structural Engineers, Faculty of Civil Engineering, Macedonia
C3  - Proceedings of the 12-th International Symposium of MASE, Macedonia, 2007
T1  - Thermal Analysis of 120m high RC Chimney
EP  - 650
SP  - 645
ER  - 
@conference{
author = "Ćetković, Marina and Najdanović, Dušan",
year = "2007",
url = "http://grafar.grf.bg.ac.rs/handle/123456789/1897",
abstract = "This paper deals with the thermal analysis of 120m high, RC chimney. The aim of the study is to find the distribution of internal forces caused by thermal loads, resulting from the difference among the ambient and the operating temperature. Namely, during the operating process, the higher temperature regime than those in the main design, has caused the thermo insulation damage, indicating the possible exceeding of ultimate strength in the concrete and reinforcement of chimney wall. It was assumed that temperature variation is uniform over the surface and linearly varying through the thickness of the chimney. Numerical analysis is performed using four-node shell element and the commercial program SAP2000. The finite element model is verified comparing the results of the thermal analysis with the available ones in the literature. The study shows that thermal radial forces and radial moments, obtained by the higher operating temperatures, are greater then the one in the original design. Furthermore these forces can cause cracks in vertical direction, so appropriate retrofit measures are to be applied.",
publisher = "Macedonian Association of Structural Engineers, Faculty of Civil Engineering, Macedonia",
journal = "Proceedings of the 12-th International Symposium of MASE, Macedonia, 2007",
title = "Thermal Analysis of 120m high RC Chimney",
pages = "650-645"
}
Ćetković M, Najdanović D. Thermal Analysis of 120m high RC Chimney. Proceedings of the 12-th International Symposium of MASE, Macedonia, 2007. 2007;:645-650
Ćetković, M.,& Najdanović, D. (2007). Thermal Analysis of 120m high RC Chimney.
Proceedings of the 12-th International Symposium of MASE, Macedonia, 2007Macedonian Association of Structural Engineers, Faculty of Civil Engineering, Macedonia., 645-650.
Ćetković Marina, Najdanović Dušan, "Thermal Analysis of 120m high RC Chimney" (2007):645-650

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