Large-Scale Experimental Validation of Steel Posttensioned Connections with Web Hourglass Pins
Publication: Journal of Structural Engineering
Volume 139, Issue 6
Abstract
A new self-centering beam-to-column connection is proposed. The connection uses posttensioned high-strength steel bars to provide self-centering capability and carefully designed energy-dissipation (ED) elements that consist of steel cylindrical pins with an hourglass shape. The proposed ED elements have superior ED and fracture capacity, and are placed between the upper and the bottom flanges of the beam such that they do not interfere with the composite slab. A simplified performance-based procedure was used to design the proposed connection. The connection performance was experimentally validated under quasi-static cyclic loading. The specimens were imposed to drift levels beyond the expected design ones to identify all possible failure modes. The experimental results show that the proposed connection eliminates residual drifts and beam damage for drifts lower than or equal to 6%. A simplified analytical procedure using plastic analysis and simple mechanics was found to accurately predict the connection behavior. Repeated tests on a connection specimen were conducted, along with replacing damaged ED elements. These tests showed that the proposed ED elements can be easily replaced without welding or bolting, and hence the proposed connection can be repaired with minimal disturbance to building use or occupation in the aftermath of a major earthquake.
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Acknowledgments
The experimental research presented in this paper was funded by Australian Research Council (ARC) Discovery Project DP0879734. The authors would also like to thank all the technical staff of the Structures Laboratory at the University of Western Sydney for their valuable assistance with the experimental work.
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Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 6 • June 2013
Pages: 1033 - 1042
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 13, 2011
Accepted: Aug 2, 2012
Published online: Aug 13, 2012
Published in print: Jun 1, 2013
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