Post-earthquake fire resistance of CFRP strengthened reinforced concrete structures

Behnam, Behrouz and Ronagh, Hamid R. (2014) Post-earthquake fire resistance of CFRP strengthened reinforced concrete structures. Structural Design of Tall and Special Buildings, 23 11: 814-832. doi:10.1002/tal.1084


Author Behnam, Behrouz
Ronagh, Hamid R.
Title Post-earthquake fire resistance of CFRP strengthened reinforced concrete structures
Journal name Structural Design of Tall and Special Buildings   Check publisher's open access policy
ISSN 1541-7794
1541-7808
Publication date 2014-08-10
Year available 2013
Sub-type Article (original research)
DOI 10.1002/tal.1084
Open Access Status
Volume 23
Issue 11
Start page 814
End page 832
Total pages 19
Place of publication Bognor Regis, West Sussex, United Kingdom
Publisher John Wiley & Sons
Collection year 2014
Language eng
Abstract Post-earthquake fire (PEF) presents a high risk to buildings that have been partially damaged in a prior earthquake, particularly in urban areas. As most standards and criteria ignore the possibility of fire after earthquake, buildings are not adequately designed for that possibility, and thus, PEF is a high-risk load needed to be scrutinized further, codified and become part of a routine design. An investigation based on sequential analysis inspired by FEMA356 is performed here on two RC frames, of three and five stories, at the Life Safety performance level and designed to the ACI 318-08 code, after they have been subjected to a spectral peak ground acceleration of 0.35g. A fire analysis of the weakened structures follows, from which the time it takes for the damaged structures to collapse is determined. As a point of reference, the fire resistance is also determined for undamaged structures and before the occurrence of earthquake. The results show that structures previously damaged by the earthquake and exposed to PEF are considerably more vulnerable than those that have not been damaged previously. A method using carbon fiber-reinforced polymer as a means of relocation of plastic hinges away from the column faces towards the beams is introduced as a function of the time required for fire extinguishment or evacuation. This is carried out to increase the structural load-carrying capacity, thus reducing the potential damage for the anticipated earthquake and thereby improve the PEF resistance. The results show a considerable improvement in the PEF resistance of the frames. While the investigation and the proposition relate to a certain class of structures (ordinary buildings, intermediate RC structures, three and five stories) and the results can therefore be applied only to the cases investigated, it is hoped that this study paves the way for further research into this very important phenomenon and leads to an eventual revision of codes.
Keyword Carbon fiber-reinforced polymer (CFRP)
Fire-resistance rating
Hinge relocation
Life safety performance level
Post-earthquake fire
Sequential analysis
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 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 04 Apr 2013, 09:47:46 EST by Julie Hunter on behalf of School of Civil Engineering