Experimental and Numerical Investigation of Bare and Strengthened Wide-Flange Sections Subject to Near-Field Blast Loading
Publication: Journal of Structural Engineering
Volume 147, Issue 9
Abstract
When a wide-flange section is exposed to close-in detonation, local and global deformation modes are developed due to a complex nonuniform pressure environment. The local deformation includes local distortion and rotation of the flanges, as well as deformation of the web, or even breaching near the web/flange junction. Experimental studies are presented to investigate the response of wide-flange sections to close-in detonations with and without stiffener plates and loaded about their weak and strong bending axes. The effectiveness of the stiffeners in mitigating damage is studied, and although they do have a positive effect, in some cases, the stiffeners do not contribute to the member resistance. Numerical models, validated against the test results, are used for a parametric study on the effect of the angle of incidence between the charge and the section, and the web-to-flange thickness ratio. It is found that a member needs to be analyzed for loading directions between the weak and strong bending axes to account for the maximum possible flange distortion. The thickness of the flange is irrelevant for the local web deformation but important for the global behavior of the member.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The Lyon Sachs Research Fund, University of Toronto, has provided financial support for this study. The authors would like to thank the National Building Research Institute at Technion, Israel Institute of Technology and Mr. Pavel Larianovsky for technical support preparing the field test specimens, Professor Avraham Dancygier for his support and advice, and the Fortification branch of the Combat Corps of Engineers of the Israel Defense Forces, and especially Mr. David Benamou, for their help in conducting the tests. The Explora Foundation is acknowledged for providing support and resources for participation and contribution to the development of this research initiative.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 9 • September 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jan 5, 2021
Accepted: Apr 8, 2021
Published online: Jul 12, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 12, 2021
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