Uplift Behavior of Horizontal Anchor Plates in Sand

Dickin, Edward A.

doi:10.1061/(asce)0733-9410(1988)114:11(1300)

Cited by 178 publications

(73 citation statements)

References 16 publications

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“…More details about the numerical scheme and the contact law can be found in Rognon et al (2015). increase in force for small displacements followed by a slow decrease in force, which is consistent with existing anchor force-displacement measurements (Rowe & Davis, 1982;Dickin, 1988). The anchor uplift capacity F 0 is defined as the maximum of F (δy) for each test.…”

Section: Measuring Uplift Capacity Using Demsupporting

confidence: 79%

Grain-size effect on uplift capacity of plate anchors in coarse granular soils

Athani

Kharel

Airey

et al. 2017

Géotechnique Letters

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This letter investigates the uplift capacity of plate anchors in granular soils. Simulations based on a discrete-element method are used to measure the uplift capacity of anchors of differing widths to embedment B/H and width to grain-size B/d ratios. Results confirm that the uplift capacity of anchors with a large B/d ratio is well described by existing models developed from continuum mechanics, with no grain-size effect. In contrast, results reveal a strong deviation from these models for anchors with relatively small B/d ratios. A semi-empirical model is introduced that captures this strong grain-size effect. This model is further supported by a micro-mechanical analysis, indicating that anchor uplift capacities are not only governed by a frustum mechanism predicted by continuum mechanics but also involve the mobilisation of grains surrounding this frustum. These results and model are particularly important to rationalise uplift capacities measured in small-scale experiments, typically involving small B/d ratios, and to safely upscale them to larger anchor size relevant to field applications.

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Section: Measuring Uplift Capacity Using Demsupporting

confidence: 79%

Grain-size effect on uplift capacity of plate anchors in coarse granular soils

Athani

Kharel

Airey

et al. 2017

Géotechnique Letters

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“…Dickin (1988) performed 41 tests on 25mm anchor plates with aspect ratios of LńB + 1, 2, 5 and 8 at embedment ratios HńB up to 8 in both loose and dense sand. A number of conventional gravity tests were also performed and compared to the centrifuge results.…”

Section: Previous Studiesmentioning

confidence: 99%

Three-dimensional lower-bound solutions for the stability of plate anchors in sand

2006

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Purpose The Faculty of Engineering and Surveying Technical Reports serve as a mechanism for disseminating results from certain of its research and development activities. The scope of reports in this series AbstractSoil anchors are commonly used as foundation systems for structures that require uplift or lateral resistance. These types of structures include transmission towers, sheet pile walls and buried pipelines. Although anchors are typically complex in shape (e.g. drag or helical anchors), many previous analyses idealise the anchor as a continuous strip under plane strain conditions. This assumption provides numerical advantages and the problem can solved in two dimensions. In contrast to recent numerical studies, this paper applies three dimensional numerical limit analysis and axi-symetrical displacement finite element analysis to evaluate the effect of anchor shape on the pullout capacity of horizontal anchors in sand. The anchor is idealised as either square or circular in shape. Results are presented in the familiar form of breakout factors based on various anchor shapes and embedment depths, and are also compared with existing numerical and empirical solutions.

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“…The uplift capacities are often expressed in dimensionless form as breakout factor N qu [14]. The breakout factor is determined by the following formula: u qu T N= γBLH (1) in which N qu is breakout factor, T u is the uplift capacity, γ is soil unit weight, B is anchor width, L is anchor length and H is embedment depth.…”

Section: Results Of Experimental and Numerical Studiesmentioning

confidence: 99%

“…A number of experimental investigations were reported by several researchers to evaluate the uplift capacity of anchor plates in cohesionless soil [11][12][13][14][15][16][17][18][19]. The results of these investigations showed that the uplift capacity of the anchor plates can be significantly improved by increasing the size and depth of anchor plate.…”

Section: Introductionmentioning

confidence: 99%

Geogrid Donatılı Kumda Grup Ankraj Plakalarının Çekme Kapasitesinin İncelenmesi

Emirler¹,

Tolun²,

Laman³

2016

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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In this study, the uplift capacity of group anchors has been investigated in sand with and without geogrid reinforcement experimentally and numerically. While the investigated parameters are the effect of embedment ratio of anchors and number of geogrid layers for a single anchor plate and 2x2 anchor configuration, the constant parameters are spacing ratio between anchors, depth of the first layer of geogrid, vertical spacing ratio of geogrid layers and length of geogrid. Experimental studies have been modelled and analyzed with Plaxis 3D which is a finite elements software. The results obtained from both of the studies have been compared and the validity of the numerical analysis has been investigated on the uplift capacity of anchor plate. As a result, it was shown that depending on the reinforcement geogrid, the uplift capacity of anchor plate can be improved by up to 2 times that of the unreinforced sand. Keywords: Laboratory test, Numerical analysis, Uplift capacity, Anchor plate, Geogrid Geogrid Donatılı Kumda Grup Ankraj Plakalarının Çekme Kapasitesinin İncelenmesi ÖzBu çalışmada, geogridle güçlendirilmiş ve güçlendirilmemiş kum zemindeki grup ankrajların çekme kapasitesi deneysel ve sayısal olarak incelenmiştir. Tek ve 2x2 yerleşim düzenindeki ankraj plakalarında gömülme oranı ve geogrid tabakası sayısının çekme kapasitesine etkisi araştırılırken, ankrajlar arası mesafe oranı, geogrid tabakasının ilk derinliği, geogrid tabakaları arası düşey mesafe ve geogrid tabakasının uzunluğu sabit tutulmuştur. Deneyler sonlu elemanlar programına dayalı Plaxis 3D bilgisayar programı ile sayısal olarak modellenmiş ve analiz edilmiştir. Deneysel çalışmalar ve sayısal analizlerden elde edilen sonuçlar karşılaştırılmış ve sayısal analizin ankraj plakasının çekme kapasitesini tahminindeki başarısı araştırılmıştır. Sonuç olarak, geogridle güçlendirmenin ankraj plakasının çekme kapasitesini 2 kata kadar artırdığı görülmüştür.

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Uplift Behavior of Horizontal Anchor Plates in Sand

Cited by 178 publications

References 16 publications

Grain-size effect on uplift capacity of plate anchors in coarse granular soils

Grain-size effect on uplift capacity of plate anchors in coarse granular soils

Three-dimensional lower-bound solutions for the stability of plate anchors in sand

Geogrid Donatılı Kumda Grup Ankraj Plakalarının Çekme Kapasitesinin İncelenmesi

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