Three-Dimensional Lower Bound Solutions for Stability of Plate Anchors in Clay
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 129, Issue 3
Abstract
Soil anchors are commonly used as foundation systems for structures that require uplift or lateral resistance. These types of structures include transmission towers, sheet pile walls, and buried pipelines. Although anchors are typically complex in shape (e.g., drag or helical anchors), many previous analyses idealize the anchor as a continuous strip under plane strain conditions. This assumption provides numerical advantages and the problem can be solved in two dimensions. In contrast to recent numerical studies, this paper applies three-dimensional numerical limit analysis to evaluate the effect of anchor shape on the pullout capacity of horizontal anchors in undrained clay. The anchor is idealized as either square, circular, or rectangular in shape. Estimates of the ultimate pullout load are obtained by using a newly developed three-dimensional numerical procedure based on a finite-element formulation of the lower bound theorem of limit analysis. This formulation assumes a perfectly plastic soil model with a Tresca yield criterion. Results are presented in the familiar form of break-out factors based on various anchor shapes and embedment depths, and are also compared with existing numerical and empirical solutions.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 129 • Issue 3 • March 2003
Pages: 243 - 253
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Mar 16, 2000
Accepted: Jun 25, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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