Strength Enhancement of Rectangular Reinforced Concrete Columns using Fiber-Reinforced Polymer
Publication: Journal of Composites for Construction
Volume 6, Issue 3
Abstract
The strength enhancement of concentrically loaded columns bonded with external fiber-reinforced polymer (FRP) systems arises from two sources. First, the confinement effect of transverse fiber sheets leads to an increase in the uniaxial compressive strength of the confined concrete, resulting subsequently in an increase in the contribution of concrete to the load-carrying capacity of the column. Second, the longitudinal fiber sheets contribute directly to the load-carrying capacity of the column. The confinement effect of the externally bonded FRP systems in rectangular columns is known to be less than that in circular or square columns. This study specifically examines the case of rectangular reinforced concrete columns with a section aspect ratio of 3.65, which are typical in construction of monolithic housing apartments. A total of 52 half-scale, short columns were fabricated and tested to failure under a concentric load to investigate the effect of fiber type and configuration and fiber anchors on the strength enhancement of the columns. The effect of the presence of plaster finishes was also examined. A simple analytical approach is proposed for the evaluation of the axial load capacity of the strengthened columns.
Get full access to this article
View all available purchase options and get full access to this article.
References
American Concrete Institute (ACI) Committee 318. (1999). “Building code requirements for structural concrete and commentary.” Detroit.
American Concrete Institute (ACI) Committee 440. (2002). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures, Detroit, in press.
British Standards Institution (BSI). (1997). “Structural use of concrete. Part 1: Code of practice for design and construction.” BS8110, London.
International Conference of Building Officials (ICBO). (1997). “Acceptance criteria for concrete and reinforced and unreinforced masonry strengthening using fiber-reinforced composite systems.” AC125, Whittier, Calif.
Mander, J. B., Priestley, M. J. N., and Park, R.(1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 114(8), 1804–1826.
Wang, Y. C., and Restrepo, J. I.(2001). “Investigation of concentrically loaded reinforced concrete columns confined with glass fiber-reinforced polymer jackets.” ACI Struct. J., 98(3), 377–385.
Information & Authors
Information
Published In
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jul 11, 2001
Accepted: Jan 14, 2002
Published online: Jul 15, 2002
Published in print: Aug 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.