Out-of-Plane Behavior of URM Walls Strengthened with Fabric-Reinforced Cementitious Matrix Composite
Publication: Journal of Composites for Construction
Volume 18, Issue 4
Abstract
The use of unreinforced masonry (URM) walls is common practice in different types of construction, such as interior or exterior walls. URM walls are typically deficient in flexural capacity when subjected to out-of-plane loading caused by high wind pressure or earthquakes. Retrofitting masonry walls with novel materials, such as fiber-reinforced polymer (FRP) composites, has shown enhancement of the flexural capacity and pseudoductility. This study evaluates the feasibility of fabric-reinforced cementitious matrix (FRCM) as an alternative external strengthening technology to improve out-of-plane behavior of URM walls. This paper reports experimental results on flexural capacity of nine clay brick walls of which six were strengthened with two different amounts of FRCM, namely one and four reinforcement fabrics. Experimental evidence shows significant improvements in the structural performance in terms of flexural capacity and stiffness of the strengthened walls. An analysis, disregarding arching effect, is conducted, and its results are compared with the experimental database. From here, the design limits are discussed. Finally, experimental data from other research programs using FRP are reported to show that when flexural capacity is related to a calibrated reinforcement ratio, the two technologies are equivalent.
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Acknowledgments
The authors acknowledge the National Science Foundation (NSF) for the support provided to the Industry/University Center for Integration of Composites into Infrastructure (CICI) at the University of Miami under grant IIP-0933537 and its industrial member Ruredil S.p.A., San Donato Milanese, Italy. The authors also thank Titan America Inc., Medley, Florida, for their support to this project. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF.
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Information & Authors
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Published In
Journal of Composites for Construction
Volume 18 • Issue 4 • August 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 22, 2013
Accepted: Nov 12, 2013
Published online: Dec 20, 2013
Discussion open until: May 20, 2014
Published in print: Aug 1, 2014
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