In-Plane Seismic Performance of Fully Grouted Reinforced Masonry Shear Walls
Publication: Journal of Structural Engineering
Volume 143, Issue 7
Abstract
Reinforced masonry (RM) shear walls are key structural elements widely used to resist lateral loads in masonry buildings due to their capability to provide lateral strength, stiffness, and energy dissipation. This paper investigates the in-plane seismic performance of fully grouted RM shear walls dominated by shear failure. The experimental work involved assessing the response of five single-story RM shear walls when subjected to in-plane axial compressive stress, cyclic lateral excitations, and top moment. The studied parameters were the horizontal reinforcement ratio, level of axial compressive stress, and shear span to depth ratio. Most of the current provisions in masonry design codes for nominal in-plane shear strength, , for RM shear walls consider a percentage of the yield capacity for the shear resistance provided by the horizontal reinforcement, . Moreover, they limit the effect of the shear span to depth ratio, , to an upper value of 1.0. The test results concluded that the horizontal reinforcement could contribute 100% of its yield capacity toward . In addition, increasing from 1.25 to 1.875 resulted in a significant reduction in the shear strength by 25%, which means that limiting the effect of to an upper value of 1.0 is overestimating of RM shear walls at high values of . However, this reduction is accompanied by higher displacement ductility. On the other hand, increasing the axial compressive stress resulted in a higher with more brittle failure.
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Acknowledgments
This study was supported by the Natural Science and Engineering Research Council of Canada (NSERC) and was conducted in collaboration with the Canadian Masonry Design Centre (CMDC) and the Canadian Concrete Masonry Producers Association (CCMPA).
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©2017 American Society of Civil Engineers.
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Received: May 9, 2016
Accepted: Nov 18, 2016
Published ahead of print: Mar 13, 2017
Published online: Mar 14, 2017
Published in print: Jul 1, 2017
Discussion open until: Aug 14, 2017
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