Influence of overburden pressure and soil rigidity on uplift behavior of square plate anchor in uniform clay

Chen, Zongrui; Tho, K.K.; Leung, C.F.; Chow, Y. K.

doi:10.1016/j.compgeo.2013.04.002

Cited by 65 publications

(46 citation statements)

References 14 publications

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“…As reported by Chen et al (2014), in the centrifuge tests under different gravity accelerations, the configuration of load-displacement curves would be different, while the maximum resisting forces remain the same. Figure 9 shows the normalized load-depth curves calculated at the embedment ratio of 2.86 and obtained from model tests under 50 and 100 g. As can be seen that, the numerical result agrees better with the model test curve under 100 g in terms of the configuration of the load-depth curve.…”

Section: Validation By Experimentsmentioning

confidence: 94%

“…This criterion was ever adopted by O'Neill et al (2003;Yang et al, 2010;Sahoo and Kumar, 2013) in numerical studies. Note that although Chen et al (2013) employed large deformation finite element analysis to study the UPC of square anchors embedded in uniform clay, this criterion was also adopted by them. However, not all loaddisplacement curves have a plateau.…”

Section: The Plateau Criterionmentioning

confidence: 99%

“…The centrifuge test data of Chen et al (2014) and the present numerical results are plotted together in Fig. 7, in which the normalized pullout capacity of anchor is calculated as Equation 5:…”

Section: Validation By Experimentsmentioning

confidence: 99%

“…The numerical model is constructed simulating the centrifuge tests by Chen et al (2014). The centrifuge tests were conducted under an acceleration of 50 g on anchors with the embedment ratio varying from 0.54 to 2.86 and under an acceleration of 100 g on anchors only embedded at the depth of 2.86 B.…”

Section: Validation By Experimentsmentioning

confidence: 99%

“…It is also noted that only Wang et al (2009) adopted the maximum resistance criterion to determine the UPC of plate anchors by using the large deformation method (RITSS). Being an interesting comparison, although Chen et al (2013) also utilized the large deformation method known as coupled Eulerian-Lagrangian technique, the plateau criterion was still adopted to determine the UPC of plate anchors. This seems that the maximum resistance criterion is not definitely adopted even if the large deformation analysis is performed.…”

Section: Basic Considerationmentioning

confidence: 99%

See 4 more Smart Citations

The Criterion for Determining the Ultimate Pullout Capacity of Plate Anchors in Clay by Numerical Analysis

Liu¹,

Su²,

Zhou³

2014

American Journal of Engineering and Applied Sciences

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The Ultimate Pullout Capacity (UPC) is an important index in designing and analyzing plate anchors. However, there are still uncertainties in determining the UPC through the load-displacement curves calculated from numerical analysis. The review on the existing criteria for determining the UPC also demonstrates that there has not been a generally accepted criterion and most existing criteria are not only uncertain but also irrational. Considering that there are still divergences and confusions in determining the UPC and specific studies are rare, further investigations are needed to clarify this basic but important topic before analyzing the UPC and the performance of plate anchors. The present work just emphasizes on the criterion for determining the UPC of plate anchors in clay. After a review of current studies on this topic, the maximum resistance criterion based on large deformation finite element analysis is recommended to determine the UPC of plate anchors, which accords with two rules. The first, a deterministic value of UPC can be obtained by using the criterion. The second, the criterion must be rational which means that it implies clear and right physical meaning and can be generally applied. This criterion is validated firstly by three model tests and then applied to rectangular and circular plate anchors at different embedment depths in both uniform and linear clays to calculate the bearing capacity factors.

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Section: Validation By Experimentsmentioning

confidence: 94%

Section: The Plateau Criterionmentioning

confidence: 99%

Section: Validation By Experimentsmentioning

confidence: 99%

Section: Validation By Experimentsmentioning

confidence: 99%

Section: Basic Considerationmentioning

confidence: 99%

See 3 more Smart Citations

The Criterion for Determining the Ultimate Pullout Capacity of Plate Anchors in Clay by Numerical Analysis

Liu¹,

Su²,

Zhou³

2014

American Journal of Engineering and Applied Sciences

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Three‐dimensional upper‐bound limit analysis of ultimate pullout capacity of anchor plates using variation method

Zhao

Tan

et al. 2022

Num Anal Meth Geomechanics

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The uplift bearing capacity of anchor plates has been the focus of geotechnical engineering research. In this study, based on the upper-bound limit analysis theory and considering the nonlinear characteristics of geomaterials, the three-dimensional uplift behavior of a shallow horizontal anchor plate was analyzed. Based on the variational principle, virtual power principle, and equilibrium equation, the ultimate pullout forces of rectangular and circular anchor plates were derived, and the dimensionless breakout factor and failure mechanism of the overlying soil were obtained. The ultimate pullout forces were in good agreement with the existing research results, and the principal stresses along the rupture surface agreed well with that obtained by numerical analysis, which could demonstrate the effectiveness and accuracy of the proposed method. Moreover, the effects of the nonlinear coefficient, anchor size and aspect, embedment ratio, and surface overload on the breakout factor were investigated. Meanwhile, the shape modification factors of rectangular and circular anchor plates were obtained. The findings of this study can provide a useful reference for anchor plate design.

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Uncertainty quantification of offshore anchoring systems in spatially variable soil using sparse polynomial chaos expansions

Charlton

Rouainia

2019

Numerical Meth Engineering

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The trend toward deep water energy production has led to a growing use of plate anchors to moor floating production facilities. The effect on anchor uplift behaviour of the inherent spatial variability of soil deposits has so far been little considered, despite having important implications for anchor design. Spatial variability problems are commonly analysed by Monte Carlo simulation but it is difficult to establish the probabilities of failure that are of interest in practice.In this paper, sparse polynomial chaos expansions (SPCEs) are used for moment and reliability analysis of plate anchors in spatially variable undrained clay. A novel two-stage methodology is proposed: in the first stage, an SPCE is constructed to meet a target global error, allowing statistical moments of the uplift capacity to be obtained; in the second stage, an active learning method is used to refine the SPCE for reliability analysis. Anchor uplift capacity is obtained by a finite element method, which is coupled with a random field representation of spatial variability. The effect of embedment depth and the soil-anchor interface is investigated. The failure mechanism of the anchor is shown to have a significant effect on the statistical moments of the uplift capacity and the probability of failure in relation to current design guidelines. To inform future design, factors of safety are presented for a range of failure probabilities. KEYWORDSanchor uplift capacity, failure probabilities, Monte Carlo simulation, sparse polynomial chaos expansions, spatial variability, statistical moments 748

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Influence of overburden pressure and soil rigidity on uplift behavior of square plate anchor in uniform clay

Cited by 65 publications

References 14 publications

The Criterion for Determining the Ultimate Pullout Capacity of Plate Anchors in Clay by Numerical Analysis

The Criterion for Determining the Ultimate Pullout Capacity of Plate Anchors in Clay by Numerical Analysis

Three‐dimensional upper‐bound limit analysis of ultimate pullout capacity of anchor plates using variation method

Uncertainty quantification of offshore anchoring systems in spatially variable soil using sparse polynomial chaos expansions

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