Numerical Modeling of Concrete-Filled FRP Tubes’ Dynamic Behavior under Blast and Impact Loading
Publication: Journal of Structural Engineering
Volume 142, Issue 2
Abstract
A major difficulty of the analysis of and design for close-in blasts is the high variability of the blast shock waves and the complex interactions between these waves and structures. Close-in blasts also tend to be severe loads that may cause extensive damage to a structural member. If the member in question is a load bearing column, its destruction may lead to a catastrophic progressive collapse of the structure. Thus any improvement on the performance of columns under close-in blast loading is a valuable addition to knowledge. This paper outlines a numerical model built using commercially available software to predict the response of concrete filled fiber reinforced polymer (FRP) tubes (CFFTs) and regular round reinforced concrete members to impacts and close-in blasts and determine the factors influencing their response. The models were verified against drop weight impact test lab measurements and single degree of freedom blast analyses. A parametric study was conducted using the verified models to investigate the effects of diameter, reinforcement ratio, and size of the blast on the response of CFFTs. It was found that the peak displacement response was inversely proportional to all three parameters. The results of the parametric study were used to construct new pressure-impulse diagrams for experimentally tested CFFT specimens that reflect the increased capacity of such members to blast loading.
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Acknowledgments
The authors thank 2 Combat Engineers Regiment (2 CER) for its invaluable assistance during the blast testing phase of this project. The authors additionally gratefully acknowledge the financial support provided by the Military Engineering Research Group (MERG) and the Natural Sciences and Engineering Research Council of Canada (NSERC). The authors also express gratitude to the support staff at the Royal Military College of Canada for their valuable assistance during the preparation and testing of the specimens.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 25, 2014
Accepted: Jun 10, 2015
Published online: Jul 20, 2015
Discussion open until: Dec 20, 2015
Published in print: Feb 1, 2016
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