Mode Cross-Over and Ductility of Dowelled LVL and CLT Connections under Monotonic and Cyclic Loading
Publication: Journal of Structural Engineering
Volume 144, Issue 7
Abstract
This paper presents an experimental study on dowelled connections in cross-laminated timber (CLT) and laminated veneer lumber (LVL) using ϕ20-mm mild steel dowels and internal steel plates. Connections designed to fail in brittle row shear and group tear-out were tested under monotonic loading to assess the validity of analytical models from literature and code provisions. Connections designed to provide nonlinearity before failure and thus produce ductility were tested under both monotonic and cyclic loading to study the influence of cyclic loading on ductility and the possibility of mode cross-over. It was found that cross layers in CLT improve ductility. Furthermore, mode cross-over from ductile response to brittle failure was observed in both CLT and LVL connections. Nevertheless, a good amount of ductility was achieved in all layouts (except the LVL connections designed for group tear-out failure) before cross-over to brittle failure occurred.
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Acknowledgments
The authors would like to acknowledge Natural Hazard Research Platform of New Zealand and Department of Civil & Natural Resources Engineering at the University of Canterbury for providing research funding. XLam NZ Ltd. and Nelson Pine Industries Ltd. are also gratefully acknowledged for providing the test specimens. The authors would also like to thank Mr. Shane Magic and Mr. Jared McPherson for conducting the CLT embedment tests, and Mr. Alan Poynter for providing technical laboratory assistance.
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Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 23, 2016
Accepted: Jan 5, 2018
Published online: Apr 26, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 26, 2018
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