Concrete-Filled Square and Rectangular FRP Tubes under Axial Compression
Publication: Journal of Composites for Construction
Volume 12, Issue 4
Abstract
This paper presents results of an experimental study on the behavior of square and rectangular concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) under concentric compression. FRP tubes were designed as column confinement reinforcement and were manufactured using unidirectional carbon fiber sheets with fibers oriented in the hoop direction. The effects of the thickness and corner radius of the tube, sectional aspect ratio, and concrete strength on the axial behavior of CFFTs were investigated experimentally. Test results indicate that FRP confinement leads to substantial improvement in the ductility of both square and rectangular columns. Confinement provided by the FRP tube may also improve the axial load-carrying capacity of the square and rectangular columns if the confinement effectiveness of the FRP tube is sufficiently high. The results also indicate that the confinement effectiveness of FRP tubes is higher in square columns than in rectangular columns, and in both sections the effectiveness of confinement increases with the corner radius. Furthermore, for a given confinement level, improvement observed on the axial behavior of concrete due to confinement decreases with increasing concrete strength.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 4 • August 2008
Pages: 469 - 477
Copyright
© 2008 ASCE.
History
Received: Mar 6, 2007
Accepted: Jul 26, 2007
Published online: Aug 1, 2008
Published in print: Aug 2008
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