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Post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes

Title: Post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes
Authors: Yang, H
Liu, F
Gardner, L
Item Type: Journal Article
Abstract: The post-fire behaviour of slender reinforced concrete columns confined by circular steel tubes is investigated experimentally and numerically in this paper. Experiments were performed firstly to explore the fundamental behaviour of steel tube confined reinforced concrete (STCRC) slender columns after exposure to the ISO 834 standard fire, including the cooling phase. Temperature distributions, load versus lateral displacement curves, strains in the steel tube and failure modes were obtained and discussed. Next, a 3D finite element model was developed with the program ABAQUS using a sequentially coupled thermal-stress analysis. After validation of the FE model, parametric studies were carried out to identify the influence of key parameters on the load-bearing capacity and buckling reduction factor of slender STCRC columns. The considered parameters were the heating time, crosssectional dimension, slenderness ratio, material strength, steel tube to concrete area ratio and reinforcement ratio. Finally, a simplified design method was proposed for predicting load-bearing capacity of STCRC slender columns after exposure to standard fires.
Issue Date: 19-Nov-2014
Date of Acceptance: 21-Oct-2014
URI: http://hdl.handle.net/10044/1/49309
DOI: https://dx.doi.org/10.1016/j.tws.2014.10.014
ISSN: 0263-8231
Publisher: Elsevier
Start Page: 12
End Page: 29
Journal / Book Title: Thin-Walled Structures
Volume: 87
Copyright Statement: © 2014 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Engineering, Civil
Engineering
Circular steel tube confined reinforced concrete
Experiments
Post-fire
Residual capacity
Slender column
Testing thermal distribution
FIRE RESISTANCE
TUBULAR COLUMNS
STRENGTH
EXPOSURE
TEMPERATURE
DESIGN
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Civil Engineering
Publication Status: Published
Appears in Collections:Civil and Environmental Engineering
Faculty of Engineering