Dynamic Analysis of Multihazard-Resistant Bridge Piers Having Concrete-Filled Steel Tube under Blast Loading
Publication: Journal of Bridge Engineering
Volume 17, Issue 2
Abstract
Research was conducted to analytically investigate the blast-response and behavior of multihazard-resistant bridge piers having circular-shaped, concrete-filled steel tube (CFST) columns. Two different analysis methods, namely a single-degree-of-freedom (SDOF) dynamic analysis and a fiber-based dynamic analysis, were used for this purpose and calibrated with the maximum residual deformations obtained from scale blast tests of CFST columns. It was noted that the structural response of SDOF dynamic analyses is sensitive to assumptions made in the load-mass factors needed to model structural components as an equivalent SDOF system. Fiber-based dynamic analyses showed that high-frequency modes of vibration have some influence on the structural response when subjected to blast loading. This study shows that different values of the shape factors, (which reduces blast pressures when applied to a circular column), must be used with different analytical methods, along with assumptions and conditions behind these different analytical methods.
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Acknowledgments
This research was conducted by the University at Buffalo and was supported by the Federal Highway Administration under contract number FHADTFH61-98-C-00094 to the Multidisciplinary Center for Earthquake Engineering Research. This support is gratefully appreciated. However, any opinions, findings, conclusions, and recommendations presented in this paper are those of the writers and do not necessarily reflect the views of the sponsors. The authors especially thank Dr. James C. Ray at the Engineering Research and Development Center of the USACE for his help and assistance in the logistics of the experiments.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 17 • Issue 2 • March 2012
Pages: 249 - 258
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Apr 30, 2010
Accepted: May 10, 2011
Published online: May 12, 2011
Published in print: Mar 1, 2012
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