Post-earthquake fire performance-based behavior of unprotected moment resisting 2D steel frames

Behnam, Behrouz and Ronagh, Hamid Reza (2014) Post-earthquake fire performance-based behavior of unprotected moment resisting 2D steel frames. KSCE Journal of Civil Engineering, 19 1: 274-284. doi:10.1007/s12205-012-0527-7


Author Behnam, Behrouz
Ronagh, Hamid Reza
Title Post-earthquake fire performance-based behavior of unprotected moment resisting 2D steel frames
Journal name KSCE Journal of Civil Engineering   Check publisher's open access policy
ISSN 1226-7988
1976-3808
Publication date 2014-08-20
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s12205-012-0527-7
Open Access Status Not Open Access
Volume 19
Issue 1
Start page 274
End page 284
Total pages 11
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract Post-Earthquake Fire (PEF) can lead to the collapse of buildings that are partially damaged in a prior earthquake that occurred immediately before the fire. The majority of standards and codes for the design of structures against earthquake ignore the possibility of PEF and thus buildings designed with those codes fail prematurely when subjected to PEF. A sequential analysis based on FEMA356 is performed here on the Immediate Occupancy (IO), corresponding to a structure designed as school occupancy, and Life Safety (LS) performance levels, corresponding to a structure designed as reside ntial occupancy, of two steel moment resisting frames. These frames are first subjected to an earthquake load with the PGA of 0.35g. This is followed by a fire analysis, using both the ISO834 model and the Natural fire model. The time it takes for the structure weakened by the earthquake to collapse under fire is then calculated. As a point of reference, fire only analyses are also performed for the undamaged structures. The results show that earthquake weakened structures are more vulnerable to fire than undamaged structures. The results also show that both fire resistance and PEF resistance of the frame designed as school are more than the frame designed as residential. Whilst the investigation is for a certain class of structures (steel moment resisting frames, 5 stories), the results confirm the need for the incorporation of PEF in the process of analysis and design and provides some quantitative measures on the level of associated effects.
Keyword Post earthquake fire
Sequential analysis
Fire resistance
Steel moment resisting structures
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 20 August 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 16 Sep 2014, 19:23:52 EST by Julie Hunter on behalf of School of Civil Engineering