Collapse Fragility Curves for Concrete Dams: Comprehensive Study
Publication: Journal of Structural Engineering
Volume 142, Issue 10
Abstract
This paper explores the seismic fragility curves for gravity dams with or without ground motion vertical component within the context of performance-based earthquake engineering. Structural analyses are performed using multiple-record incremental dynamic ones. The resulting capacity curves are contrasted with the well-established ones of framed structures. An optimal intensity measure parameter is also selected among 37 variations, and it is determined that the combined spectral acceleration leads to lowest dispersion. Finally, the derived fragility curves using the scaled records are compared with those from probabilistic seismic demand analysis (unscaled records). Results show acceptable consistency between the two methods. In addition, the effect of accounting for the epistemic uncertainty and pool elevation are discussed and are found to respectively alter the dispersion and median value of the collapse fragility curves.
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Acknowledgments
This research was partially supported by a Dissertation Completion Fellowship from the Civil, Environmental, and Architectural Engineering department at the University of Colorado, Boulder. The authors would like to acknowledge the invaluable discussion by Professor Keith Porter, CU Boulder. Last but not least, the authors would like to thank the anonymous reviewers for their valuable comments and suggestions to improve the quality of the paper.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 10, 2015
Accepted: Feb 16, 2016
Published online: Apr 28, 2016
Discussion open until: Sep 28, 2016
Published in print: Oct 1, 2016
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