Solution charts for the consolidation of circular footings embedded in a finite stratum

2009 ◽  
Vol 46 (6) ◽  
pp. 708-718 ◽  
Author(s):  
Wen-Wei Zhang ◽  
Guofu Zhu ◽  
Ren Wang ◽  
Qingshan Meng
Keyword(s):  
Finite Element Method ◽  
Time Factors ◽  
Maximum Error ◽  
Technical Note ◽  
The Finite Element Method ◽  
Present Solution ◽  
Consolidation Settlement ◽  
Soil Skeleton ◽  
Degree Of Consolidation ◽  
Biot’S Consolidation

This technical note used the finite element method to investigate the consolidation behaviour of circular footings embedded in a finite stratum based on Biot’s consolidation theory. The influence of three factors on the degree of consolidation settlement was examined: (1) the ratio of the buried depth to the thickness of the stratum, (2) the ratio of the footing radius to the thickness of the stratum, and (3) the Poisson’s ratio of the soil skeleton. Based on the results of analysis, new normalized time factors are suggested. It is shown that the degree of consolidation exhibits very good normalized behaviour using the time factors. The authors also present solution charts for determining the degree of consolidation settlement of circular footings embedded in a finite stratum. These charts can provide engineers with a quick answer to the design issues. The maximum error caused by using the solution charts is within 3%.

Solution charts for the consolidation of double soil layers

2005 ◽  
Vol 42 (3) ◽  
pp. 949-956 ◽  
Author(s):  
Guofu Zhu ◽  
Jian-Hua Yin
Keyword(s):  
Solution Procedure ◽  
Technical Note ◽  
Average Degree ◽  
Soil Layers ◽  
Consolidation Settlement ◽  
Degree Of Consolidation ◽  
Independent Parameters

This technical note presents solution charts for determining the average degree of consolidation of double soil layers for both one-way and two-way drainage. The influence of two newly introduced independent parameters on the average degree of consolidation is examined. The solution procedure is described clearly. When the compressibility, permeability, and thickness of the material making up each layer are given, the charts can be used to obtain the average degree of consolidation of the double soil layers for consolidation settlement calculations.Key words: consolidation, double soil layers, solution charts, drainage, settlement, soil.

Elasto-Viscoplastic Constitutive Equations for Clay and Its Application to Consolidation Analysis

1990 ◽  
Vol 112 (2) ◽  
pp. 202-209 ◽  
Author(s):  
T. Adachi ◽  
F. Oka ◽  
M. Mimura
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Mathematical Structure ◽  
Creep Rupture ◽  
Sample Thickness ◽  
The Finite Element Method ◽  
One Dimensional ◽  
Consolidation Analysis ◽  
Biot’S Consolidation

The mathematical structure of Adachi and Oka’s model, a typical overstress type elasto-viscoplastic constitutive model, for normally consolidated clays is discussed. Since it has been recognized that the overstress type models cannot describe the acceleration creep and creep rupture, the Adachi and Oka’s model was modified so that it can explain the creep rupture including acceleration creep of normally consolidated clays. In addition, based on the Adachi and Oka’s constitutive model and Biot’s consolidation theory, one-dimensional consolidation problems were analyzed numerically by the finite element method. Results show that the proposed method can describe the effect of sample thickness and aging on consolidation phenomena.

Meso modeling of silk wire rope scaffolds in tissue engineering

2016 ◽  
Vol 47 (3) ◽  
pp. 377-389 ◽  
Author(s):  
Sayyed Behzad Abdellahi ◽  
Elham Naghashzargar ◽  
Dariush Semnani
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Element Model ◽  
Maximum Error ◽  
Wire Rope ◽  
The Finite Element Method ◽  
Energy Potential ◽  
Wire Ropes ◽  
Element Method

Finite element method can provide valuable results and information to evaluate and assess the mechanical behavior of tissue engineered scaffolds. In this investigation, a structurally and analytically based model is applied to analyze and to describe the mechanical properties of wire rope yarns as scaffold or other applications in textile engineering. In order to modeling the mechanical behavior of single yarn, non-linear hyperfoam model with three strain energy potential has been used. The results of finite element model are compared with an experimental approach and showed good agreement between software and experimental analysis with a maximum error at break of about 4.3%. As a result, validation of the finite element method is guaranteed for analysis of other structure of multi twisted yarn or wire ropes.

scholarly journals Analysis of the Foundation Slab Settlement of the “Africa Pavilion” Facility in Wrocław

2015 ◽  
Vol 37 (4) ◽  
pp. 47-55
Author(s):  
Eugeniusz Sawicki ◽  
Tomasz Strzelecki
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Calculations ◽  
Soil Consolidation ◽  
The Finite Element Method ◽  
Two Phase ◽  
Foundation Slab ◽  
Consolidation Theory ◽  
Phase Medium ◽  
Biot’S Consolidation

Abstract This article presents the results of numerical calculations of soil consolidation underneath the “Africa Pavilion” structure in Wrocław Zoo, Poland. To determine the deformations of the baseplate of the “Africa Pavilion” and deformations of the subsoil, Biot’s consolidation theory for two-phase medium was applied. The calculations were carried out using the professional program FlexPDE v.6, which is based on the Finite Element Method. Numerical calculations performed were used to evaluate the design assumptions allowing for the laying of hydraulic conduits under the slab.

scholarly journals Degradation of flood embankments – Results of observation of the destruction mechanism and comparison with a numerical model

2017 ◽  
Vol 7 (1) ◽  
pp. 237-243 ◽  
Author(s):  
Piotr Bogacz
Keyword(s):  
Finite Element Method ◽  
Numerical Model ◽  
Strain State ◽  
Simplified Model ◽  
Test Apparatus ◽  
The Finite Element Method ◽  
Air Entrapment ◽  
Destruction Mechanism ◽  
Sea Sand ◽  
Soil Skeleton

AbstractThe paper presents the results of model tests conducted for a flood embankment under varying conditions of saturation. Test embankments were formed from the natural sea sand. The test apparatus consisted of the box with internal dimensions 200 × 100 × 4.5 cm, and thus ensured the implementation of the plane strain state. In most tests during watering air entrapment was observed, leading to formation of open soil discontinuities, called macropores (their dimensions many times exceeded the grain size of the soil skeleton). Analysis of images from a number of tests allowed to create a simplified model of the evolution of a macropore. The numerical model has been based on the finite element method using the PLAXIS 2D software. A comparison has been made between the observation of the phenomena occurring in the physical model and the results of the simulation of the phenomena in the numerical model. A correlation has been proven between the results acquired in reality and the results derived from the numerical model.

Numerical Analysis of Cold Tube Drawing Operation using Finite Element Method

2011 ◽  
Vol 5 ◽  
pp. 44-52 ◽  
Author(s):  
M.H. Oladeinde ◽  
John A. Akpobi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Galerkin Finite Element ◽  
Tube Drawing ◽  
Present Solution ◽  
Numerical Experimentation ◽  
Parametric Studies ◽  
Finite Difference Solution ◽  
Element Method

In this paper the effect of semi die angle on drawing load in cold tube drawing has been investigated numerically using the finite element method. The equation governing the stress distribution was derived and solved using Galerkin finite element method. An isoparametric formulation for the governing equation was utilized along with C0 cubic isoparametric element. Numerical experimentation showed that the results obtained using the present method is very close to the analytical solution and more accurate than finite difference solution. Having established the accuracy of the present solution method, parametric studies were carried out to show the effect of semi die angle on the drawing load for different tube drawing processes. The analysis was carried out using a Visual Basic.Net program developed by the authors. The results are presented in both graphical and tabular forms.

The application of the finite element method to solving Biot's consolidation equation

1982 ◽  
Vol 3 (6) ◽  
pp. 857-871
Author(s):  
Zheng Jia-dong ◽  
Hu Hui-zhi ◽  
Xu Hong-jiang ◽  
Zhu Ze-min ◽  
Yin Zong-ze
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Biot’S Consolidation ◽  
Element Method
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