Failure Envelope Approach for Consolidated Undrained Capacity of Shallow Foundations
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 8
Abstract
A generalized framework is applied to predict consolidated undrained VHM failure envelopes for surface circular and strip foundations. The failure envelopes for consolidated undrained conditions are shown to be scaled from those for unconsolidated undrained conditions by the uniaxial consolidated undrained capacities, which are predicted through a theoretical framework based on fundamental critical state soil mechanics. The framework is applied to results from small-strain finite-element analyses for a strip and circular foundation of selected foundation dimension and soil conditions, and the versatility of the framework is validated through a parametric study. The generalized theoretical framework enables consolidated undrained VHM failure envelopes to be determined for a practical range of foundation sizes and linearly increasing soil shear-strength profiles through the expressions presented in this paper.
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Acknowledgments
This work forms part of the activities of the Centre for Offshore Foundation Systems (COFS). Established in 1997 under the Australian Research Council’s Special Research Centres Program. Supported as a node of the Australian Research Council’s Centre of Excellence for Geotechnical Science and Engineering, and through the Fugro Chair in Geotechnics, the Lloyd’s Register Foundation Chair and Centre of Excellence in Offshore Foundations and the Shell EMI Chair in Offshore Engineering. The second author is supported through ARC grant CE110001009. The work presented in this paper is supported through ARC grant DP140100684. This support is gratefully acknowledged.
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© 2016 American Society of Civil Engineers.
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Received: Aug 29, 2014
Accepted: Jan 11, 2016
Published online: Apr 22, 2016
Published in print: Aug 1, 2016
Discussion open until: Sep 22, 2016
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