Diagonal Compression Testing of FRP-Retrofitted Unreinforced Clay Brick Masonry Wallettes
Publication: Journal of Composites for Construction
Volume 15, Issue 5
Abstract
To address concerns regarding the seismic vulnerability of New Zealand unreinforced masonry (URM) buildings, a research program was undertaken to investigate the effectiveness of fiber-reinforced polymer (FRP) systems as a seismic retrofit intervention for in-plane loaded URM walls that are prone to fail in a shear mode during earthquakes. Seventeen URM wallettes were retrofitted with either externally bonded (EB) glass FRP fabrics, EB pultruded carbon FRP (CFRP) plates, or near-surface mounted pultruded CFRP rectangular bars. The wallettes were tested by the application of a diagonal compressive force, and data were recorded for applied force and corresponding wall drift. Results were compared with five nominally identical unretrofitted wallettes. It was determined that the FRP systems substantially increased the shear strength of the wallettes. Significant increases in the pseudoductility and the toughness were also obtained, which are all considered to be important goals of any seismic retrofit intervention.
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Acknowledgments
The authors wish to acknowledge the financial support of the New Zealand Foundation for Research, Science and Technology (FRST), the Building Research Association of New Zealand (BRANZ), and the Higher Education Commission of Pakistan (HEC). The authors also wish to thank Fyfe Co., LLC, and Sika AG for donating FRP; Golden Bay Cement for their donation of cement; and Alistair Russell and Ronald Lumantarna for their help during the experimental program and allowing the authors to include their test results. Support provided by Building Chemical Supplies and Contech New Zealand pertaining to supply and installation of FRP is also gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 5 • October 2011
Pages: 810 - 820
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jun 10, 2010
Accepted: Feb 9, 2011
Published online: Feb 11, 2011
Published in print: Oct 1, 2011
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