Residual Strength of Cable Stay Strands from Blast Qualification
Publication: Journal of Bridge Engineering
Volume 24, Issue 8
Abstract
This paper describes the residual strength of damaged strand and wires from protected cable stay bundles subjected to severe blast qualification tests. This effort was motivated by the question: What reserve strength is available, if any, in damaged strands and wires from protected cable stay bundles surviving a blast test? This question arises from performance requirements to evaluate the adequacy of protection mitigation measures for cable stay bundles. To address this question, selected strands and wires from cable stay bundles had their damage characterized and were tested in tension, and then their tension capacity was compared with that of undamaged strands or wires. Testing revealed cold work of the strands from the blast reduces the residual strength by a mean value of 5% and, based on these results, it is recommended to apply a strength reduction factor of 0.95 to all intact or non-severed wires in a cable stay bundle for future blast qualification tests.
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Acknowledgments
This research was supported in part by the Federal Highway Administration (FHWA). The advice and consultation provided by Sarah Skeen, Steve Ernst, and Sheila Duwadi of the FHWA was greatly appreciated and most helpful. Any opinions, findings, conclusions, and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors. Permission to publish was granted by the FHWA.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 24 • Issue 8 • August 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Jun 14, 2018
Accepted: Mar 8, 2019
Published online: May 21, 2019
Published in print: Aug 1, 2019
Discussion open until: Oct 21, 2019
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