Temperature and stress in concrete cylinder specimen subject to uniform heat flux: a numerical solution

Le, Quang X., Dao, Vinh T. N. and Torero, Jose L. (2015). Temperature and stress in concrete cylinder specimen subject to uniform heat flux: a numerical solution. In: Dilum Fernando, Jin-Guang Teng and Jose L Torero, Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015). International Conference on Performance-based and Life-cycle Structural Engineering, Brisbane, QLD, Australia, (1060-1068). 9-11 December 2015. doi:10.14264/uql.2016.407

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Author Le, Quang X.
Dao, Vinh T. N.
Torero, Jose L.
Title of paper Temperature and stress in concrete cylinder specimen subject to uniform heat flux: a numerical solution
Conference name International Conference on Performance-based and Life-cycle Structural Engineering
Conference location Brisbane, QLD, Australia
Conference dates 9-11 December 2015
Proceedings title Proceedings of the Second International Conference on Performance-based and Life-cycle Structural Engineering (PLSE 2015)
Place of Publication Brisbane, QLD, Australia
Publisher School of Civil Engineering, The University of Queensland
Publication Year 2015
Sub-type Fully published paper
DOI 10.14264/uql.2016.407
Open Access Status File (Publisher version)
ISBN 9781742721477
Editor Dilum Fernando
Jin-Guang Teng
Jose L Torero
Start page 1060
End page 1068
Total pages 9
Collection year 2016
Language eng
Formatted Abstract/Summary
The outbreak of fire in a concrete infrastructure can have disastrous consequences, including severe structural damage, total loss of contents, and loss of life. Adequate structural fire design is therefore critical. Despite significant past studies, our understanding of concrete performance in fire remains inadequate. This paper will first highlight major limitations of conventional testing and accordingly of resulting constitutive models for concrete at elevated temperatures. The paper will then detail results of a thermal stress coupling analysis as part of an ongoing research at The University of Queensland that aims to develop more realistic constitutive models through studying performance of concrete cylinders subject to known consistent heat flux boundary conditions. It is clearly shown that (i) Different levels of incident heat flux causes significantly different evolution of temperature and stress profiles within the specimen; and (ii) Such profiles and their nature may be considerably modified by mechanical loading. Accordingly, heat flux, and temperature gradient by extension, may have non-negligible influence on thermal and structural behaviour of concrete and concrete structures – Such influence has not been captured in currently available models.
Keyword Concrete
Elevated temperature
Fire
Temperature gradient
Heat transfer
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Tue, 22 Dec 2015, 14:58:32 EST by Quang X. Le on behalf of Faculty Of Engineering, Architecture & Info Tech