Carbon Fiber–Reinforced Polymer Reinforcement for Rotational Behavior of Bolted Glulam Beam-to-Column Connections
Publication: Journal of Composites for Construction
Volume 21, Issue 3
Abstract
This paper presents the results of an experimental study on the use of carbon fiber–reinforced polymer sheets as reinforcement for the rotational behavior of bolted glulam beam-to-column connections. Monotonic loading was applied on connection specimens to identify their stiffness, ductility, and maximum moment resistance values. Material property tests were conducted and used to provide an unbiased judgment of the reinforcing efficiency considering varied specimen qualities. Different sheet wrapping patterns and layers of sheets were examined, and the results were compared with each other and results from previous studies. It was found that carbon fiber–reinforced polymer sheets could improve the moment capacity of unreinforced connections by up to 59%, which is very close to the reinforcing ratio (65%) achieved by using locally cross-laminated glulam members. A linear relationship was found between the increased perpendicular-to-grain glulam tensile strength and the increased moment resistance by use of the reinforcing materials, and the moment resistance increase corresponding to a unit glulam tensile strength increase, designated as the reinforcing efficiency, from the internally wrapped carbon fiber–reinforced polymer sheets was higher than the other methods studied. The results of this study can be used as reference for reinforcement of existing glulam timber frame structures.
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Acknowledgments
This research was financially supported by the National Natural Science Foundation of China (Grant No. 51478336) and the Applied Technology Development project of Shanghai Science and Technology Committee (Grant No. 2015-110).
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Published In
Journal of Composites for Construction
Volume 21 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Apr 8, 2016
Accepted: Aug 4, 2016
Published online: Sep 26, 2016
Discussion open until: Feb 26, 2017
Published in print: Jun 1, 2017
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