Uplift Resistance of Strip Anchors in Cohesive Frictional Mediums of Limited Tensile Strength
Publication: International Journal of Geomechanics
Volume 17, Issue 9
Abstract
This study investigated the uplift resistance of strip anchors embedded in cohesive frictional soils or rocks exhibiting zero or low tensile strength. Uplift resistance was estimated on the basis of the upper-bound theorem of the limit analysis assuming that the ground obeys the Mohr–Coulomb failure criterion with or without tension cutoff. Calculus of variations was used to assess the geometry of the failure surface. The effects of geometrical and geotechnical parameters on the uplift pressure were systematically analyzed, particularly the effect of the tensile strength, which has not been investigated in the literature to date. Comparative computations show that the solution presented gives results similar to those of numerical stress analyses and improves on existing upper-bound solutions because it provides a lower value for the upper bound of the uplift resistance under the realistic assumption of negligible tensile strength. The improvement is small for soils but significant for rock masses, where neglecting the tension cutoff would lead to a false presupposition of considerable tensile strength.
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Published In
International Journal of Geomechanics
Volume 17 • Issue 9 • September 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Feb 18, 2016
Accepted: Dec 16, 2016
Published online: Mar 31, 2017
Discussion open until: Aug 31, 2017
Published in print: Sep 1, 2017
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