Upper Bound Solution of Ultimate Pullout Capacity of Strip Plate Anchor Subjected to Pore Pressure Based on Hoek-Brown Failure Criterion

2011 ◽  
Vol 255-260 ◽  
pp. 146-150 ◽  
Author(s):  
Fu Huang ◽  
Xiao Li Yang ◽  
Kan Huang
Keyword(s):  
Pore Pressure ◽  
Failure Mechanism ◽  
Upper Bound ◽  
Failure Criterion ◽  
Pullout Capacity ◽  
Upper Solution ◽  
Bound Solution ◽  
Strip Plate ◽  
Plate Anchor ◽  
Ultimate Pullout Capacity

Based on a curved failure mechanism, an upper bound solution of ultimate pullout capacity of strip plate anchor subjected to pore pressure is derived using the upper bound theorem of limit analysis in conjunction with Hoek-Brown failure criterion. The effect of water pressure which is assumed to be a work rate of external force is included in the upper bound analysis. By employing variational calculation to minimize the objective function, the upper solution of ultimate pullout capacity is obtained. In order to evaluate the validity of the method, the solutions in this paper are compared with the results using linear multiple blocks failure mechanism. The good agreement shows that the curved failure mechanism is an effective method for evaluating the upper solution of ultimate pullout capacity of strip plate anchor.

scholarly journals Upper-bound limit analysis of soils with a nonlinear failure criterion

2020 ◽  
Vol 57 (3) ◽  
pp. 423-432 ◽  
Author(s):  
R. Zhang ◽  
C.C. Smith
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Failure Criterion ◽  
Retaining Wall ◽  
Analytical Techniques ◽  
Failure Surface ◽  
Yield Function ◽  
Flow Rule ◽  
Nonlinear Failure Criterion ◽  
Bound Solution

Limit analysis is a widely used technique for the analysis of geotechnical collapse states and there exists a significant body of literature covering its application to soils with a linear failure criterion. However, such a failure criterion is often an idealization of an actual nonlinear response for which available analytical techniques are limited. This paper presents a new fully general solution procedure for generating multi-wedge rigid-block upper-bound mechanisms for a soil with a nonlinear failure criterion, utilizing a curved interface that obeys the nonlinear yield function flow rule along its full length. This work extends the long-established kinematic sliding-wedge approach for linear soils and is illustrated through application to active and passive retaining wall and anchor–trapdoor problems. Through additional consideration of the lower-bound solution, close bounds on the retaining wall problem to within ∼1% are established. The ability of the nonlinear upper bound solution to predict the shear and normal stress at every point along the failure surface is discussed.

scholarly journals Ultimate Pullout Capacity of a Square Plate Anchor in Clay with an Interbedded Stiff Layer

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Tugen Feng ◽  
Jingyao Zong ◽  
Wei Jiang ◽  
Jian Zhang ◽  
Jian Song
Keyword(s):  
Finite Element ◽  
Empirical Formula ◽  
Soil Layer ◽  
Embedment Depth ◽  
Layered Soils ◽  
Pullout Capacity ◽  
Plate Anchor ◽  
Square Plate ◽  
Plate Anchors ◽  
Ultimate Pullout Capacity

Three-dimensional nonlinear numerical analysis is carried out to determine the ultimate pullout capacity of a square plate anchor in layered clay using the large finite element analysis software ABAQUS. An empirical formula for the pullout bearing capacity coefficient of a plate anchor in layered soils is proposed based on the bearing characteristics of plate anchors in single-layer soils. The results show that a circular flow (circulation field) is induced around the plate anchor during the uplift process and that the flow velocity and circulation field range are mainly affected by the properties of the soil around the plate anchor. The bearing characteristics of plate anchors in layered soils are influenced by factors such as the embedment depth of the plate anchor, the friction coefficient between the soil and the plate anchor, the thickness of the upper soil layer, and the thickness of the middle soil layer. The rationality of the finite element numerical calculation results and the empirical formula is verified by comparing the results from this study with results previously reported in the literature.

Sign in / Sign up

Export Citation Format

Share Document