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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5478
Title: Behaviour of continuous concrete filled steel tubular columns loaded eccentrically in fire
Authors: Ukanwa K.U.
Lim J.B.P.
Sharma, Umesh KumarK.
Hicks S.J.
Abu A.
Charles Clifton G.
Published in: Journal of Constructional Steel Research
Abstract: Concrete filled steel tubular (CFST) columns used in multi-storey buildings are generally designed as continuous members all over the world. This research has focused on the behaviour of eccentrically loaded continuous columns in fire, through the standard fire furnace testing of twelve CFST square columns of 3.2 m length. The tests covered three different types of infill; plain concrete, bar reinforced concrete and steel fibre reinforced concrete, with the columns subjected to compressive load levels ranging from 0.33 to 0.41. The result shows that, the significant initial expansion of the steel tube relative to the concrete reported by many researchers did not eventuate, due to the restraining effect of the unheated column between the furnace and the end supports. This represents a typical continuous column in a multi-storey building where the column above and below the floor on fire remains cooler. The use of conventional reinforcement increased the FRR of the column compared to using steel fibre or plain concrete infills. Using the experimentally measured fire resistance rating, the axial capacity in fire was calculated in accordance with DR AS/NZS 2327 and EN 1994-1-2 and it was shown that the code is too conservative for all continuous column loaded eccentrically. ¬© 2017 Elsevier Ltd
Citation: Journal of Constructional Steel Research(2017), 139(): 280-287
URI: https://doi.org/10.1016/j.jcsr.2017.09.030
http://repository.iitr.ac.in/handle/123456789/5478
Issue Date: 2017
Publisher: Elsevier Ltd
Keywords: Continuous columns
Eccentric columns
Fibre reinforced concrete
Fire resistance rating
ISSN: 0143974X
Author Scopus IDs: 57194383496
7403452656
57214359120
7102152734
24461072100
57211384282
Author Affiliations: Ukanwa, K.U., Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand
Lim, J.B.P., Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand
Sharma, U.K., Department of Civil Engineering, India Institute of Technology, Roorkee, India
Hicks, S.J., New Zealand Heavy Engineering Research Association, HERA House, Auckland, New Zealand
Abu, A., Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch, New Zealand
Charles Clifton, G., Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand
Corresponding Author: Charles Clifton, G.; Department of Civil and Environmental Engineering, The University of AucklandNew Zealand; email: c.clifton@auckland.ac.nz
Appears in Collections:Journal Publications [CE]

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