Pullout capacity of circular plate anchor in clay – FE analysis

2002 ◽  
pp. 507-513 ◽  
Author(s):  
Z Mehryar ◽  
Y Hu ◽  
M Randolph
Keyword(s):  
Circular Plate ◽  
Fe Analysis ◽  
Pullout Capacity ◽  
Plate Anchor

scholarly journals Pullout Capacity Of Cylindrical Block Embedded In Sand

2018 ◽  
Vol 40 (1) ◽  
pp. 30-37
Author(s):  
Krzysztof Sternik ◽  
Katarzyna Dołżyk-Szypcio
Keyword(s):  
3D Model ◽  
Fe Analysis ◽  
Contact Friction ◽  
Embedment Depth ◽  
Pullout Capacity ◽  
Pullout Resistance ◽  
Pulling Forces ◽  
Pulling Force ◽  
Alternative Solutions ◽  
Cylindrical Block

Abstract Calculation of pullout capacity of anchoring concrete cylindrical block by finite element method is carried out. 3D model of the block assumes its free rotation. Alternative solutions with one and two pulling forces attached at different heights of the block are considered. Dependency of the ultimate pulling force on the points of its application, the block’s embedment depth as well as contact friction are investigated. Results of FE analysis and simple engineering estimations are compared. The maximum pullout resistance results from FE analysis when the rotation of the block is prevented.

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.

Experimental Study on the Uplift Resistance of Plate Anchor in Sand

2011 ◽  
Vol 250-253 ◽  
pp. 1371-1374 ◽  
Author(s):  
Xin Zhang ◽  
Jin Chao Yue
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Data Acquisition ◽  
Circular Plate ◽  
Data Acquisition System ◽  
Test Set ◽  
Dense Sand ◽  
Plate Anchor ◽  
Uplift Resistance ◽  
Set Up

An experimental investigation on the uplift resistance of circular plate anchor in both loose and dense sand is performed. A test set-up and an in-house data acquisition system are developed to capture the force and displacement when anchor uplifting. Two distinct load-displacement responses for plate anchor in loose and dense sand are observed. The peak uplift resistance and dimensionless breakout factor are significantly influenced by the sand density as well as the embedment ratio. The increasing rate of peak uplift resistance with embedment ratio is limited by the critical embedment ratio beyond which a smaller increasing rate is occurred. The critical embedment ratios for this study are determined as 4 and 6 for plate anchor in loose and dense sand respectively.

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.

Numerical Simulation of Drag Anchor Installation by a Large Deformation Finite Element Technique

2014 ◽  
Author(s):  
Yanbing Zhao ◽  
Haixiao Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformation ◽  
Fe Simulation ◽  
Fe Analysis ◽  
Movement Direction ◽  
Pullout Capacity ◽  
Fe Method ◽  
Element Analysis ◽  
Element Technique

Previously published finite element analysis of drag anchors only involved the pullout capacity of the anchor. There are no finite element (FE) simulations of the installation of drag anchors probably because of two restrictions. First, during the anchor installation, the installation line is needed, which is difficult to be simulated in the FE analysis. Second, the anchor installation that involves large deformation of surrounding soils can not be solved using the classical FE method. In the present work, the installation line is constructed by connecting cylindrical units with each other using connector elements. Then it is introduced into the installation of drag anchors, which is simulated by a large deformation finite element analysis using the coupled Eulerian-Lagrangian (CEL) technique. By comparing with theoretical solutions, including the tension and profile of the installation line embedded in soils, and the movement direction, drag force, drag angle and trajectory of the anchor, the FE simulation of the drag anchor installation is well verified. The present study also demonstrates that the CEL technique is effective for simulating the anchor-line-soil interactional problems.

Numerical Investigation Into the Keying Process of a Plate Anchor Vertically Installed in Cohesionless Soil

2018 ◽  
Author(s):  
Nabil Al Hakeem ◽  
Charles Aubeny
Keyword(s):  
Peak Load ◽  
Offshore Structures ◽  
Cohesionless Soil ◽  
Soil Conditions ◽  
Embedment Depth ◽  
Pullout Capacity ◽  
Vertical Loading ◽  
Wide Range ◽  
Plate Anchor ◽  
Plate Anchors

Vertically driven plate anchors offer an attractive anchoring solution for floating offshore structures, as they are both highly efficient and suitable for a wide range of soil conditions. Since they are oriented vertically after installation, keying is required to orient the anchor into the direction of applied loading. Simulation of the keying process has not been extensively investigated by previous research, especially for cohesionless soil. Reliable prediction of irrecoverable embedment loss during keying is needed, since such loss can lead to significant reduction in the uplift capacity of the plate anchors. Large deformation finite element analyses LDFE method using RITSS (Remeshing and Interpolation Technique with Small Strain) were used to simulate the keying process of strip plate anchor embedded in uniform cohesionless soil. LDFE showed that the loss in embedment depth of plate anchor during rotation is inversely proportional to the loading eccentricity e/B. It was also found that the maximum pullout capacity occurs before the end of keying process at orientations between 60° to 85° degrees for vertical loading. Also, the LDFE study showed that reduced elastic soil stiffness leading to increased levels of displacement at which the peak load is approached.

Sign in / Sign up

Export Citation Format

Share Document