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Title: Numerical analysis of plain and steel fiber reinforced concrete filled steel tubular slender column
Authors: Ukanwa K.U.
Clifton C.G.
Lim J.B.P.
Hicks S.
Sharma, Umesh Kumar
Published in: Advanced Steel Construction
Abstract: Concrete filled steel tube columns (CFST) have many potentials which include; high seismic resistance, high load bearing capacity, and fire resistance without external protection. Some major projects worldwide has adopted the use of this type of column member extensively, for columns in both the gravity systems and the seismic resisting systems. Experimental tests performed on concrete filled steel tube columns at ambient temperature indicates that, the use of steel fibre reinforced concrete infill affects the crack width propagation of the concrete. This paper presents an advanced 3D numerical model which predicts the behaviour of a CFST column filled with steel fibre reinforced concrete, taking into account the increased tensile strength of the concrete which affects the column ductility. For columns subjected to compression loading only, it is recommended to use a high strength concrete, and also increase the thickness of the steel tube rather than using a steel tube with a higher yield strength. For slender square columns loaded under large eccentricity, it is recommended to use an e/D (eccentricity/depth) ratio value less than 0.5 for design purposes, to avoid the premature fracture of the loaded end of the column having smaller steel tube thickness. ¬© 2018, Hong Kong Institute of Steel Construction. All rights reserved.
Citation: Advanced Steel Construction(2018), 14(2): 308-323
Issue Date: 2018
Publisher: Hong Kong Institute of Steel Construction
Keywords: Composite column
Concrete filled tubular columns
Finite element analysis
Square hollow steel section
Steel fibre reinforced concrete
ISSN: 1816112X
Author Scopus IDs: 57194383496
Author Affiliations: Ukanwa, K.U., Department of Civil Engineering, The University of Auckland, Auckland, New Zealand
Clifton, C.G., Department of Civil Engineering, The University of Auckland, Auckland, New Zealand
Lim, J.B.P., Department of Civil Engineering, The University of Auckland, Auckland, New Zealand
Hicks, S., New Zealand Heavy Engineering Research Association, HERA House, Auckland, New Zealand
Sharma, U.K., Department of Civil Engineering, India Institute of Technology, Roorkee, India
Funding Details: The authors wish to express gratitude to the Heavy Engineering Educational & Research Foundation (HEERF) for their scholarship support. The authors also acknowledge the contribution of NeSI high-performance computing facilities to the results of this research. NZ's national facilities are provided by the NZ eScience Infrastructure and funded jointly by NeSI's collaborator institutions and through the Ministry of Business, Innovation & Employment's Research Infrastructure programme.
Corresponding Author: Ukanwa, K.U.; Department of Civil Engineering, The University of AucklandNew Zealand; email:
Appears in Collections:Journal Publications [CE]

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