Model for Large Strain Consolidation by Centrifuge
Publication: International Journal of Geomechanics
Volume 5, Issue 4
Abstract
A numerical model, called CC1, is presented for one-dimensional large strain consolidation in a geotechnical centrifuge. The model includes all the capabilities of a previous large strain consolidation code, CS2, written for surcharge loading under normal gravity conditions. In addition, CC1 accounts for variation of acceleration factor over the depth of a centrifuge test specimen. The development of CC1 is first presented, followed by a comparison of simulated time–settlement curves with experimental measurements for Singapore marine clay and a parametric study illustrating the effects of nonuniform distribution on centrifuge consolidation behavior. Simulations indicate that the effect of spatially varying is most strongly controlled by the ratio of specimen height to centrifuge arm length and that the error associated with the assumption of constant is relatively small if this ratio is 0.2 or less. Finally, CC1 is used to calculate the optimal location within a centrifuge specimen of Singapore marine clay at which to match the desired value and the error that results if is matched at the initial midheight of the specimen.
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Acknowledgments
The experimental centrifuge consolidation data for Singapore marine clay was graciously provided by Dr. R. G. Robinson, Research Fellow in the Department of Civil Engineering at the National University of Singapore. The contribution of this high-quality data for our research is gratefully acknowledged. Financial support for this investigation was provided in part by the U.S. National Oceanic and Atmospheric Administration through the Ohio Sear Grant College Program. Financial support for graduate study of the third writer has been provided by Vijay K. Dhir, Dean of the Henry Samueli School of Engineering and Applied Science, and William W.-G. Yeh, Professor and Chair of the Department of Civil and Environmental Engineering, of the University of California–Los Angeles.
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© 2005 ASCE.
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Received: Jul 9, 2004
Accepted: Dec 7, 2004
Published online: Dec 1, 2005
Published in print: Dec 2005
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