Structural response of a MRF exposed to travelling fire

Rezvani, Farshad Hashemi and Ronagh, Hamid R. (2015) Structural response of a MRF exposed to travelling fire. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 168 9: 619-635. doi:10.1680/stbu.14.00046

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Author Rezvani, Farshad Hashemi
Ronagh, Hamid R.
Title Structural response of a MRF exposed to travelling fire
Journal name Proceedings of the Institution of Civil Engineers: Structures and Buildings   Check publisher's open access policy
ISSN 1751-7702
0965-0911
Publication date 2015-07-31
Year available 2015
Sub-type Article (original research)
DOI 10.1680/stbu.14.00046
Open Access Status File (Publisher version)
Volume 168
Issue 9
Start page 619
End page 635
Total pages 17
Place of publication London, United Kingdom
Publisher I C E Publishing
Collection year 2016
Language eng
Abstract In this study, structural response of a seismically designed steel moment-resisting frame subjected to travelling fire is investigated. This is to determine the structural strength of a generic frame designed for an extreme load when subjected to fire as another extreme load in addition to quantifying the effect of travelling fire size on its collapse behaviour. In this study, using the concept of travelling fire, and calculating the thermal field applied to structural elements, a generic frame was examined against a family of fires travelling across its first floor. In this regard, the resolved far-field gas temperatures dependent on the distance to the centre of fire were considered in order to calculate the temperature at the unprotected steel members. Analysis results revealed that fire size can deeply affect the total collapse time of a frame so that by reducing the fire size to a half or a quarter, collapse time increases by 19% and 62%, respectively. It was also suggested that columns of such structures should be designed against travelling fire considering the effect of load redistribution by which axial forces of columns might be doubled compared to the nominal loads applied to them prior to fire.
Keyword Beans & girders
Columns
Steel structures
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2016 Collection
 
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