Shear Capacity of Exterior Beam-Column Joints Reinforced with GFRP Bars and Stirrups
Publication: Journal of Composites for Construction
Volume 20, Issue 2
Abstract
The demand for sustainable concrete structures with longer service life and lower maintenance cost has been driving the use of glass fiber-reinforced polymer (GFRP) reinforcement in new concrete structures. The behavior of GFRP bars under seismic loading in reinforced concrete (RC) frame structures has not been widely investigated. Furthermore, the ability of FRP-RC frame structures to dissipate energy in seismic events is still questionable due to the elastic-linear behavior of the FRP reinforcement. Very few studies have been conducted on the seismic behavior of GFRP-RC exterior beam-column joints, and none studied the shear capacity of joints. Therefore, this study attempts to partially fill this gap by investigating the shear capacity of beam-column joints reinforced with GFRP bars and stirrups. Six full-scale exterior beam-column joint prototypes (T-shaped) were constructed and tested under simulated seismic load conditions. Test parameters in this study included the concrete strength and the shear stress level in the joint. Diagonal shear failure in the joint exhibited in some specimens showed the significance of evaluating the shear capacity in the joint.
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Acknowledgments
The authors wish to express their gratitude for the financial support received from the Natural Science and Engineering Research Council of Canada (NSERC) through Discovery and Canada Research Chairs program. In addition, the authors would like to acknowledge the equipment provided by Canada Foundation for Innovation (CFI). The GFRP reinforcement was generously provided by Schoeck Canada, Inc.
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© 2015 American Society of Civil Engineers.
History
Received: Sep 19, 2014
Accepted: Jun 24, 2015
Published online: Aug 17, 2015
Discussion open until: Jan 17, 2016
Published in print: Apr 1, 2016
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