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Polymers 2014, 6(5), 1333-1349; doi:10.3390/polym6051333

Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

School of Civil Engineering, Wuhan University, Wuhan 430072, China
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Received: 30 March 2014 / Revised: 1 May 2014 / Accepted: 5 May 2014 / Published: 8 May 2014
(This article belongs to the Special Issue Fiber-Reinforced Polymer Composites in Structural Engineering)
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Abstract

This paper presents the results of an experimental study into the behavior of concrete-filled steel tube columns confined by fiber-reinforced polymer (FRP). Eleven columns were tested to investigate the effects of the FRP layer number, the thickness of the steel tube and concrete strength on their load capacity and axial deformation capacity. The experimental results indicated that the FRP wrap can effectively confine the concrete expansion and delay the local buckling of the steel tube. Both the load capacity and the axial deformation capacity of concrete-filled steel tube columns can be substantially enhanced with FRP confinement. A model is proposed to predict the load capacity of the FRP-confined concrete-filled steel tube columns. The predicted results are generally in good agreement with the experimental ones obtained in this study and in the literature.
Keywords: concrete-filled steel tube (CFST) columns; fiber-reinforced polymer (FRP); axial load; confinement; load capacity concrete-filled steel tube (CFST) columns; fiber-reinforced polymer (FRP); axial load; confinement; load capacity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Lu, Y.; Li, N.; Li, S. Behavior of FRP-Confined Concrete-Filled Steel Tube Columns. Polymers 2014, 6, 1333-1349.

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