Firewalls and post-earthquake fire resistance of reinforced-concrete frames

Behnam, Behrouz and Ronagh, Hamid Reza (2016) Firewalls and post-earthquake fire resistance of reinforced-concrete frames. Proceedings of the Institution of Civil Engineers-Structures and Buildings, 169 1: 20-33. doi:10.1680/stbu.14.00031

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Author Behnam, Behrouz
Ronagh, Hamid Reza
Title Firewalls and post-earthquake fire resistance of reinforced-concrete frames
Journal name Proceedings of the Institution of Civil Engineers-Structures and Buildings   Check publisher's open access policy
ISSN 0965-0911
Publication date 2016-01
Year available 2015
Sub-type Article (original research)
DOI 10.1680/stbu.14.00031
Open Access Status File (Publisher version)
Volume 169
Issue 1
Start page 20
End page 33
Total pages 14
Place of publication London, United Kingdom
Publisher ICE Publishing
Collection year 2016
Language eng
Abstract Post-earthquake fire (PEF) contributes significantly to loss of life and property following large earthquakes in urban regions. In the absence of adequate PEF provisions in the codes and criteria, an investigation is performed on a reinforced concrete portal frame, divided into two unequal parts by a firewall. Acknowledging that firewalls could break down after earthquake, three fire exposure scenarios are assumed: only the left part exposed, only the right part exposed and the entire frame exposed. In the first two scenarios, the firewall remains intact, whereas in the third it is assumed to be broken down. The building is first pushed to displacement corresponding to the life safety level of performance based on FEMA 356 code. Then, using a natural fire curve, fire analysis is performed. Fire-alone analysis is performed to provide a point of reference. No failure occurs in any of the fire-alone scenarios, or when exposing the smaller part of the building to the PEF. In contrast, exposing the larger part and the entire frame to PEF makes the frame fail at around 50  min and 25  min, respectively. This shows the importance of firewalls to reduce vulnerability of reinforced concrete buildings in case of PEF. The approach used allows designers to choose the position and configuration of firewalls to best protect a building against PEF.
Keyword Buildings structures & design
Concrete structures
Disaster engineering
Pushover analysis procedure
Performance-based behavior
Seismic performance
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Published online 18 December 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 07 Feb 2016, 00:27:44 EST by System User on behalf of Learning and Research Services (UQ Library)