Experimental Investigation of Self-Centering Cross-Laminated Timber Walls
Publication: Journal of Structural Engineering
Volume 143, Issue 10
Abstract
Mass timber is an attractive and sustainable alternative structural engineering material to concrete and steel. Despite successful midrise to high-rise timber building projects around the world, such buildings have not been implemented in regions with high seismicity due in part to a lack of research and development on appropriate ductile seismic load resisting systems for heavy timber construction. This paper describes experiments conducted to develop a resilient lateral force-resisting wall system that combines cross-laminated timber (CLT) panels with vertical posttensioning (PT) to provide postevent recentering. Supplemental mild steel U-shaped flexural plate (UFPs) are intended to yield under cyclic loading while the PT and CLT components remain undamaged until large interstory drifts are experienced by the wall. The experiments were designed to explore various limit states for self-centering CLT (SC-CLT) walls, including their dependence on design variables and their effect on performance, and to investigate strength and stiffness degradation at large interstory drifts. It was found that the SC-CLT walls were able to recenter even after large drift cycles and the crushing of the CLT material was the governing limit state for most specimens. A hierarchy of desirable limit states was identified consisting of UFP yielding, CLT splitting, PT yielding, and CLT crushing.
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Acknowledgments
Financial support for this study was provided by the National Science Foundation as part of the George E. Brown Network for Earthquake Engineering Simulation under Award Nos. CMMI: 1344617, 1344646, 1344798, 1344590, and 1344621. The authors would also like to acknowledge the material donations from Weyerhaesuer and the contributions of Marjan Popovski of FPInnovations and Douglas Rammer of the Forest Products Laboratory. Any opinions, findings, conclusions, and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jun 15, 2016
Accepted: May 2, 2017
Published online: Jul 25, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 25, 2017
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