Plastic Hinge Relocation Methods for Emulative PC Beam–Column Connections
Publication: Journal of Structural Engineering
Volume 142, Issue 2
Abstract
Various plastic hinge relocation methods were studied to improve the earthquake resistance of emulative precast concrete (PC) beam-column connections using PC U-shell beams. The present study used two strengthening methods (hooked bars and headed bars) and a weakening method (reduced beam bar section), to relocate the plastic hinge zone of beams away from the weak beam-column joint. Five full-scale test specimens including a conventional reinforced concrete (RC) specimen were tested to evaluate the earthquake resistance. The test results showed that the used relocation methods significantly decreased that bond-slip of beam flexural bars and joint shear cracking. As a result, the energy dissipation capacity significantly increased, compared to those of the conventional RC specimens and PC specimens without relocation methods. On the basis of the test results, design recommendations are suggested for plastic hinge relocation design of emulative PC beam-column connections.
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Acknowledgments
This research was financially supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (2012R1A1A1003282), and the Ministry of Construction and Transportation of Korea (05 R&D D02-01). The authors are grateful to these authorities for their support.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 11, 2014
Accepted: Jun 19, 2015
Published online: Jul 30, 2015
Discussion open until: Dec 30, 2015
Published in print: Feb 1, 2016
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