Seismic Rotational Displacements of Gravity Walls by Pseudodynamic Method with Curved Rupture Surface
Publication: International Journal of Geomechanics
Volume 10, Issue 3
Abstract
This paper presents the use of pseudodynamic method to compute the rotational displacements of gravity retaining walls under passive condition when subjected to seismic loads. The concept of Newmark sliding block method for computing the rotational displacements under seismic condition and the limit equilibrium analysis have been combined in this paper to evaluate the performance of a gravity retaining walls under seismic conditions. One of the main features of the paper is the adoption of a new procedure to evaluate seismic passive earth pressure considering composite curved rupture surface (which is the combination of arc of a logarithmic spiral and straight line) and the dynamic nature of earthquake loading, which is useful to predict rotational displacements accurately. It also determines the threshold seismic acceleration coefficients for rotation using Newmark’s sliding block method. It is shown that the assumption of planar failure mechanism for rough soil-wall interfaces significantly overestimates the threshold seismic accelerations for rotation and underestimates the rotational displacements.
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Acknowledgments
The writers thank the reviewers for their valuable suggestions and constructive comments which have been very useful to revise the original manuscript to a considerable extent.
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Information
Published In
International Journal of Geomechanics
Volume 10 • Issue 3 • June 2010
Pages: 93 - 105
Copyright
© 2010 ASCE.
History
Received: Dec 29, 2008
Accepted: Sep 9, 2009
Published online: Oct 10, 2009
Published in print: Jun 2010
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