FRP Confinement of Tuff and Clay Brick Columns: Experimental Study and Assessment of Analytical Models
Publication: Journal of Composites for Construction
Volume 14, Issue 5
Abstract
In recent years, fiber-reinforced polymer (FRP) wrapping effectiveness has been clearly confirmed especially with reference to concrete structures. Despite evident advantages of FRP based confinement on members subjected to compressive overloads due to static or seismic actions, the use of such technique in the field of masonry has not been fully explored. Thus, to assess the potential of confinement of masonry columns, the present paper shows the results of an experimental program dealing with 18 square cross sections (listed faced tuff or clay brick) masonry scaled columns subjected to uniaxial compression load. In particular, three different confinement solutions have been experimentally analyzed in order to evaluate and compare the effectiveness of uniaxial glass FRP, carbon FRP, and basalt FRP laminates wrapping. The main experimental outcomes are presented and discussed in the paper considering mechanical behavior of specimens, axial stress-axial strain relationships, and effective strains at failure on the reinforcement. Test results have showed that the investigated confining systems are able to provide significant gains both in terms of compressive strength and ductility of masonry columns. Results of the presented experimental activity along with data available in the literature have been finally used to assess the reliability of the main existing analytical models; refined equations have been then proposed to minimize the scattering between theoretical predictions and experimental available data.
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Acknowledgments
The experimental work has been developed within the activities of the project MACE funded by the Italian Minister for Research and University. The materials used for strengthening the specimens discussed in this paper (GFRP, CFRP, and BFRP systems) have been provided by Mapei, Spa, Milan. The experimental tests were made possible thanks to the expertise and dedication of the senior of the laboratory of the University of Naples, eng. Pino Campanella, as well as of the whole staff of the laboratory.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 5 • October 2010
Pages: 583 - 596
Copyright
© 2010 ASCE.
History
Received: Jun 18, 2009
Accepted: Feb 2, 2010
Published online: Feb 8, 2010
Published in print: Oct 2010
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