Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22840
Title: Stress-strain model for concrete in FRP-confined steel tubular columns
Authors: Teng, JG 
Hu, YM
Yu, T
Keywords: Axial compression
Concrete-filled steel tubes
Confinement
FRP
Modeling
Strengthening
Stress-strain behavior
Issue Date: 2013
Publisher: Pergamon Press
Source: Engineering structures, 2013, v. 49, p. 156-167 How to cite?
Journal: Engineering structures 
Abstract: Concrete-filled steel tubes (CFTs) are widely used as columns in many structural systems. In CFTs, degradation in steel confinement, strength and ductility can result from inelastic outward local buckling. To overcome this deficiency of CFTs, external confinement of CFTs with an FRP jacket has been explored in recent studies. This paper presents a theoretical model in an incremental-iterative form for circular FRP-confined CFTs (CCFTs) under monotonic axial compression, with the focus being on the stress-strain behavior of the confined concrete. The proposed stress-strain model for concrete in CCFTs is based on the same approach as that commonly adopted by existing models for FRP-confined concrete and includes three components: (a) an active-confinement model; (b) a lateral strain equation; and (c) equations for determining the total confining pressure from the steel tube and the FRP jacket. It is shown that the lateral dilation behavior of concrete in CCFTs differs significantly from that of FRP-confined concrete in the initial stage because the former experiences more severe micro-cracking than the latter in the initial stage of loading; this difference is reflected in the proposed model. In general, the predictions of the proposed model are in close agreement with existing test results. The proposed model provides a useful tool for a parametric study on the stress-strain behavior of confined concrete in CCFTs to produce results for the formulation of simple stress-strain model in closed-form expressions for design use.
URI: http://hdl.handle.net/10397/22840
ISSN: 0141-0296
EISSN: 1873-7323
DOI: 10.1016/j.engstruct.2012.11.001
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

29
Last Week
0
Last month
0
Citations as of Jul 28, 2017

WEB OF SCIENCETM
Citations

20
Last Week
0
Last month
0
Citations as of Aug 15, 2017

Page view(s)

39
Last Week
1
Last month
Checked on Aug 21, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.