Flexural Behavior of Concrete-Filled Double-Skin Tubes Subject to Blast Loading
Publication: Journal of Structural Engineering
Volume 144, Issue 7
Abstract
Large-scale tests on concrete-filled double-skin tubes, composed of pairs of concentric cold-formed rectangular hollow section members with the annulus between them filled with grout, are performed under air-blast loading. The recorded data from the field tests, along with further laboratory experimentation, are used to validate numerical models developed for single-degree-of-freedom and explicit finite-element analysis. The influence of several key variables on the response of concrete-filled double-skin tubes is ascertained by means of a parametric study. Overall, the ultimate moment capacity is found to have a stronger influence on the response than do mass, stiffness, hollowness ratio, or confinement factor. The results of this investigation are used to provide design guidance for the use of these members in protective design applications.
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Acknowledgments
The authors appreciate the financial aid and in-kind support of the Explora Foundation to the University of Toronto Centre for Resilience of Critical Infrastructure. Financial support was also received from the Natural Sciences and Engineering Research Council of Canada (NSERC), the Steel Structures Education Foundation (SSEF), the Thornton Tomasetti Foundation, the Lyon Sachs Graduate Research Fund, the Australian Research Council (ARC) Discovery Grant (Project ID: DP130100181), and the Tsinghua Initiative Scientific Research Program (No. 20131089347). Technical advice and support from Prof. D. Z. Yankelevsky of Technion—Israel Institute of Technology are also highly appreciated, as is assistance from M. Gow, and M. Parratt.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 20, 2017
Accepted: Dec 20, 2017
Published online: Apr 27, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 27, 2018
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