Effect of Embedment and Spacing of Cojoined Skirted Foundation Systems on Undrained Limit States under General Loading
Publication: International Journal of Geomechanics
Volume 9, Issue 6
Abstract
A foundation system may involve more than a single footing with an arrangement such that the footings are sufficiently closely spaced that adjacent footings interact. Vertical, horizontal, and moment capacity of multifooting foundation systems are potentially dependent on footing interaction, and in particular overturning capacity can be significantly enhanced by the structural rigidity of a multifooting foundation system. There is no established procedure for the calculation of bearing capacity of a shallow foundation system comprising cojoined footings and ad hoc approaches may simply involve summing the ultimate limit states of the individual footings as if they acted independently; neglecting additional capacity of the system available from the kinematic constraint provided by the structural connection between the footings. Plane strain finite-element analyses have been carried out to investigate the undrained ultimate limit states under general loading of skirted two-footing foundation systems at various normalized spacing compared to a single skirted footing of equal bearing area and embedment ratio.
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Acknowledgments
The work described here forms part of the activities of the Special Research Centre for Offshore Foundation Systems, established under the Australian Research Council’s Research Centres Program, and now supported through Grant Nos. UNSPECIFIEDFF0561473 and UNSPECIFIEDDP0665958 and Centre of Excellence funding from the State of Western Australia. This support is gratefully acknowledged.UNSPECIFIED
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 9 • Issue 6 • November 2009
Pages: 267 - 279
Copyright
© 2009 ASCE.
History
Received: Mar 27, 2008
Accepted: Jul 1, 2009
Published in print: Nov 2009
Published online: Nov 13, 2009
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