Robustness assessment of a generic steel fire-protected moment-resisting frame under travelling fire

Rezvani, Farshad Hashemi, Behnam, Behrouz, Ronagh, Hamid R. and Jeffers, Ann E. (2016) Robustness assessment of a generic steel fire-protected moment-resisting frame under travelling fire. European Journal of Environmental and Civil Engineering, 1-18. doi:10.1080/19648189.2016.1179679


Author Rezvani, Farshad Hashemi
Behnam, Behrouz
Ronagh, Hamid R.
Jeffers, Ann E.
Title Robustness assessment of a generic steel fire-protected moment-resisting frame under travelling fire
Journal name European Journal of Environmental and Civil Engineering   Check publisher's open access policy
ISSN 1964-8189
2116-7214
Publication date 2016-05-12
Year available 2016
Sub-type Article (original research)
DOI 10.1080/19648189.2016.1179679
Open Access Status Not Open Access
Start page 1
End page 18
Total pages 18
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2017
Language eng
Abstract Due to their vulnerability to high temperatures, steel structures are typically protected against fire by insulation materials, as recommended by fire codes. The fire resistance rating of a protected member is determined based on a standard fire test, which simulates post-flashover fire conditions. Empirical evidence has shown that fires in large open-plan compartments do not burn uniformly, and a method called “traveling fire” has been introduced in previous research to simulate the effects of spreading fires. An investigation is performed here to examine the robustness of a generic four-story moment-resisting steel structure with one-hour fire resistance rating subjected to travelling fire. Various fire sizes are considered: 12.5, 25, 50 and 100% of the floor area. The results show that while no collapse occurs during the 12.5, 50 and 100% fire sizes, the structure collapses under the 25% fire size at 85 min due to the inability of the system to transfer the load after one of the columns buckles. This seems to be in contradiction with traditional belief that a fire covering a larger portion of the floor plan would reduce the safety margin. The investigation performed underlines that the fire protection of structures based on the standard time-temperature curve does not necessarily provide adequate resistance under travelling fires. With the lack of adequate fire regulations codified for large compartments, more research is required before arriving at a better understanding of the application of travelling fire to large compartments
Keyword Fireproofing
Robustness
Standard fire curves
Steel structures
Travelling fire
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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