Out-of-Plane Buckling of Ductile Reinforced Structural Walls due to In-Plane Loads
Publication: Journal of Structural Engineering
Volume 143, Issue 3
Abstract
Reinforced structural walls are often implemented as a lateral force resisting system in multistory buildings, designed to deform elastically under wind loads and form plastic hinges at their base under seismic excitation. Past research suggests plastic tensile demands and subsequent load reversals can cause a plastic, localized lateral instability in walls. Although lateral stability is addressed by some building codes, plastic buckling is rarely directly addressed. In 2010 and 2011, New Zealand experienced earthquakes that damaged many structural wall buildings, and plastic buckling was observed. This paper re-examines two existing local buckling models using a range of data sources. A review of prior experimental work assesses the models’ accuracy at predicting plastic buckling capacities. A parametric study on a range of walls examines the variables most influential to affect plastic buckling capacities. Additionally, three nonlinear time history analyses of buildings subjected to the 2010 and 2011 New Zealand earthquakes are presented and compared with field observations to assess each buckling model’s accuracy. The findings’ impacts are discussed and revisions to the buckling models are suggested. Recommendations are provided for future research on local instability of structural walls.
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Acknowledgments
The authors acknowledge the contributions of Professors James Nau, Rudolf Seracino, Murthy Guddati, and Sri Sritharan, as well as the many graduate student researchers from North Carolina State University in advising and providing guidance and assistance throughout the research program. The authors would also like to recognize Christine N. Nguyen and Jason M. Hite for their assistance in reviewing and advice on data analysis and presentation. The authors would also like to acknowledge the support of the Department of Civil, Construction, and Environmental Engineering of North Carolina State University.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 3 • March 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Mar 15, 2015
Accepted: Jul 28, 2016
Published online: Sep 26, 2016
Discussion open until: Feb 26, 2017
Published in print: Mar 1, 2017
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