Uplift Capacity of Plate Anchors in Saturated Clays: Analyses with Different Constitutive Models
Publication: International Journal of Geomechanics
Volume 16, Issue 2
Abstract
Evaluation of the uplift capacity of plate anchors in saturated clay is an important aspect in the design of offshore foundation systems of various structures. In most of the literature reviewed, simple constitutive models such as Tresca or Mohr–Coulomb (MC) have been used in evaluating the plates’ pullout capacity. There exists a need to study the pullout capacity of anchors using other advanced soil models and explore differences in computed behavior. In addition to the MC model, two other constitutive models are used herein to represent the soil behavior. These are Modified Cam-Clay and Soft Soil models. A series of finite-element analyses are performed using the three constitutive models. Undrained effective stress analyses are conducted to study the response of both strip and circular plate anchors in saturated soils. The capacities of plate anchors are assessed through the application of the displacement control approach. The effective stress parameters are correlated with the undrained shear strength, and (dimensionless breakout factor) values from the three constitutive models are presented and compared with the lower bound solution, as well as with the data obtained from similar studies and experimental data available in the literature. Differences resulting from the characteristics of the three constitutive models are examined and discussed.
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© 2015 American Society of Civil Engineers.
History
Received: Aug 28, 2014
Accepted: Mar 10, 2015
Published online: Jun 30, 2015
Discussion open until: Nov 30, 2015
Published in print: Apr 1, 2016
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