Experimental Evaluation of the System-Level Seismic Performance and Robustness of an Asymmetrical Reinforced Concrete Block Building
Publication: Journal of Structural Engineering
Volume 142, Issue 10
Abstract
In recent years, research interests in studying the response of different seismic force-resisting systems have been shifting from component-level to system-level studies. Building on the existing knowledge of component-level performance of reinforced masonry shear walls (RMSW), the current study evaluates some similarities and discrepancies between RMSW system-level and component-level responses under seismic loading. The study also focuses on evaluating the system-level seismic robustness of a RMSW building by quantifying key relevant robustness indicators proposed in the literature. To meet the study objectives, an experimental asymmetrical two-story reduced-scale RMSW building was tested to failure under simulated seismic loading. Subsequently, the study first presents a brief summary of the experimental program followed by a discussion of the damage sequence and the load-displacement hysteretic behavior of the RMSW building. In general, the experimental results demonstrated the impact of both the floor slab-induced twist and wall flexural coupling through the floor slabs on the building response, with the latter significantly influencing the building response compared to the former. In addition, the robustness indexes quantified for five key robustness indicators (drift ratio, strength, stiffness, strain energy, and residual drift ratio) can provide a means by which the system-level performance of RMSW buildings can be assessed from different perspectives under a wide range of seismic demands.
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Acknowledgments
Financial support has been provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada and the Canada Masonry Design Centre (CMDC). Additional support has been provided by the Canadian Concrete Masonry Producers Association (CCMPA). Provision of mason time by the Ontario Masonry Contractors Association (OMCA) and the support provided through the McMaster University Centre for Effective Design of Structures (CEDS), funded through the Ontario Research and Development Challenge Fund (ORDCF), are gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Mar 6, 2015
Accepted: Feb 2, 2016
Published online: Apr 26, 2016
Discussion open until: Sep 26, 2016
Published in print: Oct 1, 2016
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