Seismic Design Parameters for Special Masonry Structural Walls Detailed with Confined Boundary Elements
Publication: Journal of Structural Engineering
Volume 140, Issue 10
Abstract
In this paper, the results from a test program focusing on the behavior of eleven fully grouted reinforced masonry (RM) structural walls containing confined boundary elements are analyzed and presented according to force, displacement, and performance-based seismic design considerations. To be consistent with current force-based seismic design codes, analysis is presented to predict the strength, stiffness, displacements, and ductility-related force modification factors using the eleven test specimens. A new estimate of the plastic hinge region for displacement calculations is also proposed which considers the inherent planes of weakness in masonry mortar joints as well as the angle of inclination of shear cracks. Finally, within the context of performance-based design methodologies, the occurrence of specific damage states is identified. A methodology is proposed to estimate crack width in the walls based on curvature measurements which is also verified using digital image correlation analysis. The paper presents key seismic design parameters that are expected to contribute to the adoption of RM walls with boundary elements in the next-generation of North American seismic design codes.
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Acknowledgments
Financial support has been provided by the McMaster University Centre for Effective Design of Structures (CEDS) funded through the Ontario Research and Development Challenge Fund (ORDCF) as well as the Natural Sciences and Engineering Research Council (NSERC) of Canada. Provision of mason time by Ontario Masonry Contractors Association (OMCA) and Canada Masonry Design Centre (CMDC) is appreciated. The supply of half-scale blocks by the Canadian Concrete Masonry Producers Association (CCMPA) is gratefully acknowledged.
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Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 10 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 12, 2012
Accepted: Oct 24, 2013
Published online: May 12, 2014
Published in print: Oct 1, 2014
Discussion open until: Oct 12, 2014
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