Performance-based vulnerability assessment of multi-story reinforced concrete structures exposed to pre- and post-earthquake fire

Behnam, Behrouz and Ronagh, Hamid (2014) Performance-based vulnerability assessment of multi-story reinforced concrete structures exposed to pre- and post-earthquake fire. Journal of Earthquake Engineering, 18 6: 853-875. doi:10.1080/13632469.2014.914454


Author Behnam, Behrouz
Ronagh, Hamid
Title Performance-based vulnerability assessment of multi-story reinforced concrete structures exposed to pre- and post-earthquake fire
Journal name Journal of Earthquake Engineering   Check publisher's open access policy
ISSN 1363-2469
1559-808X
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1080/13632469.2014.914454
Open Access Status
Volume 18
Issue 6
Start page 853
End page 875
Total pages 23
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor and Francis Ltd.
Collection year 2015
Language eng
Subject 1909 Geotechnical Engineering and Engineering Geology
2205 Civil and Structural Engineering
2215 Building and Construction
Abstract Post-earthquake fire can potentially bring about much more damage than the earthquake itself. Performing a vulnerability assessment for a structure that has already sustained damage in an earthquake and is then exposed to fire is therefore of importance. This paper describes a performance-based investigation in which applied loads to a structure are appropriately quantified. To do so, a sequential structural analysis is performed on the Life Safety performance level of a three-story reinforced concrete frame selected from a building. For the analysis to be more realistic, the slab is also included in the frame analysis through the concept of effective length. The frame is first subjected to an earthquake load with the PGA of 0.30 g followed by a fire analysis, using the ISO834 fire curve and the iBMB fire curve. The time needed for the structure weakened by the earthquake to collapse under fire is then calculated. As a benchmark, fire-only analysis is also performed for the undamaged frame. Moreover, the effect of thermal spalling is considered in the slabs. The selected frame is evaluated under various failure criteria such as load capacity, displacement, and rate of displacement. The results show that no failure is observed when the frame is exposed to fire alone, either when using the ISO curve or the iBMB curve under various failure criteria. It is also shown that while the PEF resistance based on load capacity criteria under the ISO curve is around 120 minutes, it reduces to about 95 min under the iBMB curve. However, considering the rate of deflection failure criteria, the PEF resistance is around 103 min and 75 min under the ISO and the iBMB curves, respectively. It is then concluded that in the PEF analysis, the iBMB curve is more compatible with the concept of performance-based design than the ISO curve is. Copyright
Keyword Fire resistance
Ibmb fire curve
Fire curve
Life safety
Performance based design
Post earthquake fire
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 2015 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 22 Jul 2014, 02:19:18 EST by System User on behalf of School of Civil Engineering