DBPapers
DOI: 10.5593/SGEM2016/HB63/S09.054

CONSIDERATIONS ON THE TEMPERATURE STATE OF A STEEL FRAME SUBJECTED TO FIRE

L. Moga, I. Moga
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-79-7 / ISSN 1314-2704, 2 - 5 November, 2016, Book 6 Vol. 3, 419-426pp, DOI: 10.5593/SGEM2016/HB63/S09.054

ABSTRACT
The paper presents a study performed by the Building Physics research staff on the implementation of a computing software called RENESTS used for establishing the spatial temperature state in an inhomogeneous body in unsteady and nonlinear thermal regime. The computer program was used at analysing the temperature state in a metallic body subjected to a heat source (e.g. fire).
Knowing the variable temperature distribution in time in a structural steel element, allows the determination of the stress-strain state in each computing moment for the analysed component. When determining the spatial temperature state the thermal properties of the steel element (i.e. thermal conductivity, specific heat, thermal strain) have values variable with temperature. Thus, for each computing time the energy balance equation will be rewritten with the new physical and contour properties. The paper also presents the impact of the obtained results for the nonlinear case compared with the ones obtained in the linear computing hypothesis when the thermal properties of the steel elements are constant, having typical design values.

Keywords: steel structure, heat transfer, thermal properties, fire temperature, simulation

PAPER DOI: 10.5593/SGEM2016/HB63/S09.054, CONSIDERATIONS ON THE TEMPERATURE STATE OF A STEEL FRAME SUBJECTED TO FIRE

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