Deformation-Controlled Design of Reinforced Concrete Flexural Members Subjected to Blast Loadings
Publication: Journal of Structural Engineering
Volume 134, Issue 10
Abstract
Both maximum displacement and displacement ductility factors should be considered in the design of a blast-resistant structure since both parameters correlate with an expected performance level of a reinforced concrete (RC) structural member during a blast event. The blast-resistant design procedure discussed in this paper takes into account both the maximum displacement and displacement ductility responses of an equivalent single-degree-of-freedom (SDOF) system, while the response of the SDOF system is made equivalent to the corresponding targets of design performance. Some approximate errors are present when comparing the actual responses of the structural member, which has been designed for blast loading, and their corresponding design performance targets. Two indices are defined to quantify the approximation errors, and their expressions are obtained through comprehensive numerical and statistical analyses. By using the error indices, the design procedure is then modified such that the approximate responses of the RC member are equivalent to the targets of the design performance. The modified procedure is implemented in three design examples and numerically evaluated. It is concluded that the modified procedure can be used more effectively in order to ensure that the actual responses of designed members reflect the respective targets of design performance.
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Acknowledgments
This research was supported by Research Grant LEO 99.05 provided by the Defense Science and Technology Agency (DSTA), Singapore. Special thanks are due to John Crawford, President of Karagozian and Case for his critical reading of the paper and many invaluable suggestions for improvement.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 10 • October 2008
Pages: 1598 - 1610
Copyright
© 2008 ASCE.
History
Received: May 9, 2007
Accepted: Feb 29, 2008
Published online: Oct 1, 2008
Published in print: Oct 2008
Notes
Note. Associate Editor: Gary Consolazio
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