Load and Resistance Factor Design of Drilled Shafts in Sand
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 12
Abstract
Resistance factors are developed for drilled shafts for a design method based on soil variables. The uncertainties associated with the design variables and equations were systematically quantified, and Monte-Carlo simulations were performed to obtain the distributions of the shaft and base capacities. Both the base and shaft capacities were found to follow normal distributions, and the applied dead and live loads were assumed to follow normal and lognormal distributions, respectively. Reliability analysis was then performed to obtain the limit state and nominal resistances and loads for a variety of soil profiles and pile dimensions. The optimal dead- and live-load factors were subsequently obtained from the analysis. The optimal resistance factors were then adjusted for use with the load factors recommended by the Federal Highway Administration.
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Acknowledgments
This work was supported by the Joint Transportation Research Program administered by the Indiana Department of Transportation and Purdue University. The contents of this paper reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein, and do not necessarily reflect the official views or policies of the Federal Highway Administration and the Indiana Department of Transportation, nor do the contents constitute a standard, specification, or regulation.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 12 • December 2012
Pages: 1455 - 1469
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 21, 2009
Accepted: Feb 13, 2012
Published online: Feb 15, 2012
Published in print: Dec 1, 2012
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