The flexural performance of concrete-encased concrete-filled steel tubes (CFSTs) was investigated. A finite-element analysis (FEA) model is developed to analyse the flexural behaviour of the composite member and a set of test data used to verify the FEA modelling. Full-range analysis of the moment–curvature relation, the stress distributions across the composite section and the interactions between steel and concrete was carried out. It was found that thin-walled steel tubes can be used in concrete-encased CFSTs and develop full plastic strength without local buckling before reaching the ultimate state. A strut-and-tie model is proposed for the load transfer mechanism of a concrete-encased CFST member under bending. Finally, the paper presents a parametric study to derive simplified formulas for predicting the flexural capacity of concrete-encased CFST sections.
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March 2014
Research Article|
March 01 2014
Flexural performance of concrete-encased concrete-filled steel tubes Available to Purchase
Yu-Feng An;
Yu-Feng An
PhD Candidate, Department of Civil Engineering, Tsinghua University, Beijing, China
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Lin-Hai Han;
Lin-Hai Han
Professor, Department of Civil Engineering, Tsinghua University, Beijing, China
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Charles Roeder
Charles Roeder
Professor, Department of Civil Engineering, University of Washington, Seattle, WA, USA
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Publisher: Emerald Publishing
Revision Received:
September 28 2013
Revision Requested:
November 11 2013
Accepted:
November 18 2013
Online ISSN: 1751-763X
Print ISSN: 0024-9831
ICE Publishing: All rights reserved
2014
Magazine of Concrete Research (2014) 66 (5): 249–267.
Article history
Revision Received:
September 28 2013
Revision Requested:
November 11 2013
Accepted:
November 18 2013
Citation
An Y, Han L, Roeder C (2014), "Flexural performance of concrete-encased concrete-filled steel tubes". Magazine of Concrete Research, Vol. 66 No. 5 pp. 249–267, doi: https://doi.org/10.1680/macr.13.00268
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