Journal ArticleDOI
Vertical uplift resistance of two closely spaced horizontal strip anchors embedded in cohesive-frictional weightless medium
Jagdish Prasad Sahoo,Jyant Kumar +1 more
TLDR
In this article, the vertical uplift resistance of two closely spaced horizontal strip plate anchors has been investigated by using lower and upper bound theorems of the limit analysis in combination with finite elements and linear optimization.Abstract:
The vertical uplift resistance of two closely spaced horizontal strip plate anchors has been investigated by using lower and upper bound theorems of the limit analysis in combination with finite elements and linear optimization. The interference effect on uplift resistance of the two anchors is evaluated in terms of a nondimensional efficiency factor (eta(c)). The variation of eta(c) with changes in the clear spacing (S) between the two anchors has been established for different combinations of embedment ratio (H/B) and angle of internal friction of the soil (phi). An interference of the anchors leads to a continuous reduction in uplift resistance with a decrease in spacing between the anchors. The uplift resistance becomes a minimum when the two anchors are placed next to each other without any gap. The critical spacing (S-cr) between the two anchors required to eliminate the interference effect increases with an increase in the values of both H/B and phi. The value of S-cr was found to lie approximately in the range 0.65B-1.5B with H/B = 1 and 11B-14B with H/B = 7 for phi varying from 0 degrees to 30 degrees.read more
Citations
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Effect of Footing Roughness on Bearing Capacity Factor $N_ \gamma$
Jyant Kumar,K. M. Kouzer +1 more
TL;DR: In this article, the effect of interface friction angle between the footing and underlying soil mass on the bearing capacity factor was examined by using the upper bound limit analysis, finite elements, and linear programming.
Journal ArticleDOI
Undrained Stability of Unlined Square Tunnels in Clays with Linearly Increasing Anisotropic Shear Strength
TL;DR: In this paper, the authors investigated the stability of unlined square tunnels in anisotropic and non-homogeneous clays by the lower bound finite element limit analysis using second-order cone programming.
Journal ArticleDOI
Three-dimensional numerical and analytical study of horizontal group of square anchor plates in sand
TL;DR: In this article, numerical and analytical methods are used to evaluate the ultimate pullout capacity of a group of square anchor plates in row or square configurations, installed horizontally in dense sand, and the interference effect is evaluated by group efficiency, defined as the ratio of the ultimate pulling capacity of group of N anchor plates to that of a single isolated plate multiplied by number of plates.
Journal ArticleDOI
Seismic uplift capacity of shallow strip anchors: A new pseudo-dynamic upper bound limit analysis
TL;DR: In this paper, the seismic vertical uplift capacity of horizontally placed strip plate anchors in sand at shallow depths has been computed with the application of upper bound theorem of limit analysis with the satisfaction of stress boundary condition at the ground surface.
Journal ArticleDOI
Support pressure for circular tunnels in two layered undrained clay
TL;DR: In this paper, numerical solutions are developed by performing finite element lower bound limit analysis in conjunction with second-order cone programming to estimate the required support pressure for stability of circular tunnels in two layered clay under undrained condition.
References
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Book
Limit Analysis and Soil Plasticity
TL;DR: In this article, the authors present a reference record created on 2004-09-07, modified on 2016-08-08 and used for Geotechnique (generalites) reference record.
Journal ArticleDOI
Lower bound limit analysis using finite elements and linear programming
TL;DR: In this article, a technique for computing lower bound limit loads in soil mechanics under conditions of plane strain is described, where a perfectly plastic soil model is assumed, which may be either purely cohesive or cohesive-frictional, together with an associated flow rule.
Journal ArticleDOI
The Ultimate Uplift Capacity of Foundations
G G Meyerhof,J I Adams +1 more
TL;DR: In this article, the ultimate uplift capacity of foundations with special reference to transmission tower footings is evaluated and a number of model uplift tests made by the authors and by others are studied and evaluated.
Journal ArticleDOI
Upper bound limit analysis using discontinuous velocity fields
Scott W. Sloan,P.W. Kleeman +1 more
TL;DR: In this article, a method for computing rigorous upper bounds under plane strain conditions is described, based on a linear three-noded triangular element, which has six unknown nodal velocities and a fixed number of unknown multiplier rates, and uses the kinematic theorem to define a kinematically admissible velocity field as the solution of a linear programming problem.
Journal ArticleDOI
The behaviour of anchor plates in sand
R. K. Rowe,E. H. Davis +1 more
TL;DR: In this paper, the authors describe a theoretical investigation into the behavior of anchor plates in sand, considering the effects of anchor embedment, friction angle, dilatancy, initial stress and initial stress on the anchor.