Shake-Table Tests of a 3-Story Masonry-Infilled RC Frame Retrofitted with Composite Materials
Publication: Journal of Structural Engineering
Volume 139, Issue 8
Abstract
This paper presents a study that investigated the effectiveness of retrofitting unreinforced masonry infill walls with composite materials to enhance the seismic performance of infilled nonductile RC frames. The primary retrofit scheme considered was the use of engineered cementitious composite overlays. Shake-table tests were conducted on a , 3-story, 2-bay, masonry infilled RC frame that had one bottom-story wall retrofitted with engineered cementitious composites. The influence of this retrofit on the performance of the structure was investigated using the experimental observations and results of nonlinear finite element analyses. Furthermore, after walls in the second story of the structure were damaged, they were repaired by injecting epoxy into cracked mortar joints, and strengthened with a glass-fiber reinforced polymer overlay. It has been shown that both retrofit schemes are effective in enhancing the seismic performance of the structure and preventing diagonal shear failures of the RC columns.
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Acknowledgments
The research presented here was supported by National Science Foundation grant No. 0530709 awarded under the George E. Brown, Jr. Network for Earthquake Engineering Simulation Research (NEESR) program. The first and third authors’ doctoral research was partially supported by Graduate Fellowships from UCSD. The input of a professional advisory panel consisting of David Breiholz, John Kariotis, Gregory Kingsley, Joe Maffei, Ron Mayes, Paul Murray, and Michael Valley is gratefully acknowledged. The authors would like to thank the technical staff at the Englekirk Structural Engineering Center of UCSD for their efforts on the shake-table tests, Johnson Western Gunite Company for donating the labor for the application of the ECC overlay on the shake-table specimen, and Fyfe Company for donating the material and technical expertise for the GFRP installation on the specimen. However, opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsor or other contributors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 8 • August 2013
Pages: 1340 - 1351
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 7, 2011
Accepted: Jul 24, 2012
Published online: Aug 11, 2012
Published in print: Aug 1, 2013
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