Structural Evaluation of Full-Scale FRP-Confined Reinforced Concrete Columns
Publication: Journal of Composites for Construction
Volume 15, Issue 1
Abstract
The external confinement of RC columns by means of externally bonded fiber-reinforced polymer (FRP) laminates is a well established technique for strengthening and retrofitting purposes. This paper presents a pilot research that includes laboratory testing of full-scale square and rectangular RC columns externally confined with glass and basalt-glass FRP laminates and subjected to pure axial load. Specimens that are representative of full-scale building columns were designed according to a dated American Concrete Institute (ACI) 318 code (i.e., prior to 1970) for gravity loads only. The study was conducted to investigate how the external confinement affects peak axial strength and deformation of a prismatic RC column. The results showed that the FRP confinement increases concrete axial strength, but it is more effective in enhancing concrete strain capacity. The discussion of the results includes a comparison with the values obtained using existing constitutive models.
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Acknowledgments
The writers gratefully acknowledge the support of the NSF Industry/University Cooperative Research Center for “Repair of Buildings and Bridges with Composites” at the University of Miami, of the “REte dei Laboratori Universitari di Ingegneria Sismica” (RELUIS) at the University of Naples “Federico II,” of Mapei S.p.A., and of Fyfe Co. LLC. Special thanks are extended to Derek Schesser, undergraduate researcher at the University of Miami; to the Fritz Engineering Laboratory at Lehigh University, in particular to Mr. Frank Stokes and Mr. Gene Matlock; and to the Building and Fire Research Laboratory at the National Institute for Standards and Technology (NIST), in particular to Mr. Steven Cauffman and Mr. Frank Davis, for the assistance in planning and conducting the tests.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 1 • February 2011
Pages: 112 - 123
Copyright
© 2011 ASCE.
History
Received: Jan 4, 2010
Accepted: Jun 29, 2010
Published online: Jun 30, 2010
Published in print: Feb 2011
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