Dynamic Response Characteristics that Lead to Direct Shear Failure in Blast-Loaded Columns
Publication: Journal of Structural Engineering
Volume 147, Issue 9
Abstract
Blast-loaded structures respond dynamically to impulsive loads generated by an explosion. Individual components must possess adequate flexural and sectional shear capacity to survive such extreme loads. Unlike static loads, blasts can cause a unique limit state known as direct shear failure, which occurs early in the response history of a blast-loaded member. While various researchers have observed this phenomenon in past testing, the fundamental mechanics underlying this behavior are not completely understood. Multiple analysis approaches for capturing direct shear behavior of blast-loaded members have been proposed in the research literature, suggesting that further study is needed to understand this phenomenon. In this paper, direct shear response is explored in detail, demonstrating that this behavior originates from high-frequency contributions that are often neglected in modal analyses or misrepresented as a feature of traditional flexural response in single-degree-of-freedom analyses.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are proprietary or confidential in nature and may only be provided with restrictions. Test data used during the review and development of analysis models is confidential and cannot be shared. The simulation model used for modal analyses and the specific parameters used for the FE analysis studies are proprietary. Requests for additional details will be considered on an individual basis pending approval from the project sponsor.
Acknowledgments
This work was funded by the Department of Homeland Security Science and Technology Directorate, Infrastructure Protection and Disaster Management Division. The US Army ERDC was program manager for this work. The opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsors.
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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: Apr 2, 2020
Accepted: Mar 3, 2021
Published online: Jul 5, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 5, 2021
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