Simplified Method for the Lateral, Rotational, and Torsional Static Stiffness of Circular Footings on a Nonhomogeneous Elastic Half-Space Based on a Work-Equivalent Framework
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 2
Abstract
Although there are many methods for assessing vertical stiffness of footings on the ground, simplified solutions to evaluate lateral, rotational, and torsional static stiffness are much more limited, particularly for nonhomogeneous profiles of shear modulus with depth. This paper addresses the topic by introducing a novel “work-equivalent” framework to develop new simplified design methods for estimating the stiffnesses of footings under multiple degrees-of-freedom loading for general nonhomogeneous soils. Furthermore, this framework provides a unified basis to analyze two existing design methods that have diverging results. 3D finite element analyses were carried out to investigate the soil–footing interaction for a range of continuously varying and multilayered nonhomogeneous soils, and to validate the new design approach.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
Parts of the work described here were conducted during the D.Phil studies of the first author at the University of Oxford. The first author would like to thank Professor Byron Byrne, Professor Harvey Burd and Mr. Avi Shonberg for their generous support during the studies, and Ørsted Wind Power for funding the D.Phil studentship.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 2 • February 2022
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© 2021 American Society of Civil Engineers.
History
Received: Sep 30, 2020
Accepted: Oct 7, 2021
Published online: Nov 30, 2021
Published in print: Feb 1, 2022
Discussion open until: Apr 30, 2022
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