Comparison of CFRP and Alternative Seismic Retrofitting Techniques for Bare and Infilled RC Frames
Publication: Journal of Composites for Construction
Volume 15, Issue 4
Abstract
The opportunities provided by the use of modern repair schemes for the seismic retrofit of existing RC structures were assessed on a comparative experimental study of carbon fiber-reinforced polymer (CFRP) and more-conventional seismic retrofitting techniques for the repair of reinforced concrete members and masonry walls of bare and infilled RC frames, respectively, damaged because of cyclic loading. Four 1-story, one-bay, one-third-scale frame specimens are tested under cyclic horizontal loading up to a drift level of 4%—two bare frames with spirals or stirrups as shear reinforcement, respectively, and two infilled frames with weak infills and spirals or stirrups as shear reinforcement, respectively. The applied repair techniques are mainly based on the use of thin epoxy resin infused under pressure into the crack system of the damaged RC joint bodies or on the additional use of CFRP plates to the surfaces of the damaged structural RC members as external reinforcement and the use of a polymer modified cement mortar or two-sided diagonal CFRP fabrics for the damaged infill masonry walls. After repair, specimens were retested in the same way. Conclusions concerning the comparison of the effectiveness between conventional and CFRP seismic retrofitting applied techniques on the basis of maximum cycles load, loading stiffness, and hysteretic energy absorption capabilities of the tested specimens are drawn.
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Acknowledgments
The author would like to thank the Research Committee of Technological Educational Institution of Serres for funding this research project.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 4 • August 2011
Pages: 565 - 577
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 25, 2010
Accepted: Dec 14, 2010
Published online: Dec 16, 2010
Published in print: Aug 1, 2011
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