Seismic Response Analysis of a Reinforced Concrete Block Shear Wall Asymmetric Building
Publication: Journal of Structural Engineering
Volume 141, Issue 7
Abstract
This paper presents detailed analyses of experimental results pertaining to the cyclic behavior of a reduced-scale reinforced masonry (RM) asymmetric building with walls aligned in two orthogonal directions. The current study focuses on analyzing the influence of twist, as a system-level effect, on the displacement and strength demands of the building’s individual seismic force resisting system (SFRS) wall components. The study evaluates the individual wall contributions to the overall building response characteristics within both the elastic and the inelastic response phases. Documentation of the compressive strains at the wall toes is also presented and correlated to the damage levels anticipated for each wall. In addition, the building center of rotation and center of strength are determined and the corresponding twist angles and moments and building torsional stiffness values are evaluated throughout the loading history. Moreover, the trends of stiffness degradation for the walls and for the building are presented, and the relationship between the individual walls’ and building’s stiffness is discussed. Finally, the trends of energy dissipation increase with increased building displacement ductility are established for different system-level ductility levels. The information presented in this paper is expected to provide useful benchmarking data that can contribute to the understanding of RM system-level response and how it compares to the behavior of individual RM SFRS components.
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Acknowledgments
Financial support was provided through the Natural Sciences and Engineering Research Council (NSERC) of Canada. This study forms a part of an ongoing research program in McMaster University Centre for Effective Design of Structures (CEDS) funded through the Ontario Research and Development Challenge Fund (ORDCF) as well as an Early Researcher Award (ERA) grant, both are programs of the Ministry of Research and Innovation (MRI). Provision of mason time by Ontario Masonry Contractors Association (OMCA) and Canada Masonry Design Centre (CMDC) is appreciated. The provision of the scaled blocks through a grant from the Canadian Concrete Masonry Producers Association (CCMPA) is gratefully acknowledged.
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Information
Published In
Journal of Structural Engineering
Volume 141 • Issue 7 • July 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 4, 2013
Accepted: Jun 16, 2014
Published online: Aug 18, 2014
Discussion open until: Jan 18, 2015
Published in print: Jul 1, 2015
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