Generalised Tresca criterion for undrained total stress analysis

2015 ◽  
Vol 5 (4) ◽  
pp. 313-317 ◽  
Author(s):  
K. Krabbenhoft ◽  
A. V. Lyamin
Keyword(s):  
Stress Analysis ◽  
Total Stress ◽  
Tresca Criterion

Reliability approach for the side resistance of piles by means of the total stress analysis (α Method)

2007 ◽  
Vol 44 (11) ◽  
pp. 1378-1390 ◽  
Author(s):  
C. Cherubini ◽  
G. Vessia
Keyword(s):  
Stress Analysis ◽  
Undrained Shear Strength ◽  
Clayey Soils ◽  
Total Stress ◽  
First Order ◽  
Side Resistance ◽  
Reliability Method ◽  
Real Size ◽  
Bored Piles ◽  
Adhesion Factor

The evaluation of the pile–soil adhesion plays a fundamental role in the estimation of the side resistance for total stress analysis. Over the years, researchers have presented proposals for adhesion factor formulations even though only a few of them have shown a certain agreement in numerical and (or) methodological terms. Hence, several real-size experimental analyses have improved the understanding of the pile–soil adhesion phenomenon and mechanism. Nevertheless, the undrained shear strength (cu) values depend on the experimental technique employed. Such results force engineers to make a difficult choice among various formulations. A reliability analysis is performed in this paper to take into consideration the variations in formulations and values of the side resistance of bored piles in clayey soils. This study involves piles having different lengths and diameters, which are supposed to be bored in Matera clays. Such soil is characterized by means of laboratory investigation campaign, and its mechanical and stochastic main features are reported here. Values of reliability index β are calculated by means of the first-order reliability method.

A Study of a Large Compacted Clay Embankment-Fill Failure

1965 ◽  
Vol 2 (3) ◽  
pp. 274-286
Author(s):  
Alan E Insley
Keyword(s):  
Shear Strength ◽  
Stress Analysis ◽  
Safety Factor ◽  
Effective Stress ◽  
Soil Samples ◽  
Average Moisture Content ◽  
Compacted Clay ◽  
Total Stress ◽  
Compacted Soil ◽  
Effective Stress Analysis

The paper describes the failure during construction of a proposed 70 ft. high railway embankment fill. The fill was built of a uniform clay of medium plasticity which was used at an average moisture content of 3 per cent greater than had been provided for in the design. The fill failed under its own weight when it reached a height of 55 feet.In order to assist in the design of stabilizing works three test holes were drilled in the fill and soil samples recovered. Properties of field compacted and laboratory compacted soil samples are compared. The age of both types of samples is shown to have a significant effect on the test results.Both total and effective stress analyses of the embankment at failure have been performed using the laboratory values of soil strength. The total stress analysis gives a safety factor of 1.0 at failure whereas the effective stress analysis gives a safety factor of 1.2. The hazards of choosing the correct value of laboratory shear strength for the total stress analysis are discussed.

scholarly journals Large deformation finite element analysis of undrained pile installation

2016 ◽  
Vol 38 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Jakub Konkol ◽  
Lech Bałachowski
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Large Deformation ◽  
Effective Stress ◽  
Arbitrary Lagrangian Eulerian ◽  
Total Stress ◽  
Element Analysis ◽  
Ale Formulation ◽  
Phase Medium ◽  
Stress Parameters

Abstract In this paper, a numerical undrained analysis of pile jacking into the subsoil using Abaqus software suit has been presented. Two different approaches, including traditional Finite Element Method (FEM) and Arbitrary Lagrangian–Eulerian (ALE) formulation, were tested. In the first method, the soil was modelled as a two-phase medium and effective stress analysis was performed. In the second one (ALE), a single-phase medium was assumed and total stress analysis was carried out. The fitting between effective stress parameters and total stress parameters has been presented and both solutions have been compared. The results, discussion and verification of numerical analyzes have been introduced. Possible applications and limitations of large deformation modelling techniques have been explained.

Effective stress analysis of the stability of embankments on soft soils

1982 ◽  
Vol 19 (4) ◽  
pp. 433-450 ◽  
Author(s):  
G. Pilot ◽  
B. Trak ◽  
P. La Rochelle
Keyword(s):  
Stress Analysis ◽  
Effective Stress ◽  
Total Stress ◽  
Soft Soils ◽  
Effective Stresses ◽  
Methods Of Analysis ◽  
Effective Stress Analysis ◽  
The Stability ◽  
Stress Analyses

This paper presents the results of a study of stability by effective stress analysis of four embankments that were built to failure; three of these embankments are located in Narbonne, Lanester, and Cubzac in France, and the fourth one in Saint-Alban, Québec. After an outline of the procedures followed to obtain the required data and parameters, a brief discussion is presented on the defects inherent in the methods of analysis in terms of effective stresses. The factors of safety obtained by the effective stress analyses are compared with the results of total stress analyses. It is concluded that, in spite of the limitations of the method of effective stress analysis, this approach, as used in the present paper, remains a useful tool for the engineer.

Stress Analysis of Interference Fit in Wheelset

2014 ◽  
Vol 926-930 ◽  
pp. 873-876
Author(s):  
Min Zhang ◽  
Guang Zhong Hu ◽  
Shou Ne Xiao ◽  
Yong Ming Tang
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Axial Force ◽  
Contact Stress ◽  
Contact Area ◽  
High Speed ◽  
Main Role ◽  
Load Case ◽  
Total Stress ◽  
Interference Fit

The locomotive wheelset running with a high-speed, the wheels and axles of wheelset usually assembled by interference fit, the radial contact stress produced by interference cause the friction on the contact area, the axial force and torque of the wheelset transmitted by the friction. The value of prestress produced by the magnitude of interference change small in each load case, and it plays the main role in total stress of wheelset. So it’s very important that choosing a appropriate interference for the wheelset assembly base on the results solved by the finite element contact analysis.

Total Stress Analysis of Cantilever Sheetpiling in Layered Clay

1992 ◽  
Vol 118 (7) ◽  
pp. 1064-1081 ◽  
Author(s):  
Jay S. DeNatale ◽  
German A. Ibarra‐Encinas
Keyword(s):  
Stress Analysis ◽  
Total Stress ◽  
Layered Clay

A pseudo-two-dimensional seismic analysis of earth dams

1991 ◽  
Vol 28 (5) ◽  
pp. 660-667
Author(s):  
M. Soulié ◽  
B. N. Touileb ◽  
V. Silvestri
Keyword(s):  
Stress Analysis ◽  
Effective Stress ◽  
Cross Sections ◽  
Stress Responses ◽  
Seismic Analysis ◽  
Upstream Region ◽  
Two Dimensional ◽  
Earth Dams ◽  
Dimensional Model ◽  
Total Stress

This paper describes the development of a pseudo-two-dimensional model for the prediction of the seismic responses of earth dams of heterogeneous cross sections. The model, called DESRA-2.MOD, has been applied to both the total stress and the effective stress responses of a dam subjected to earthquake loading. In the case of the total stress analysis, the DESRA-2.MOD model provides results that approximate reasonably well those obtained by means of the more precise two-dimensional QUAD-4 model. As for the effective stress analysis, it is shown that zones of liquefaction develop during the earthquake and propagate through the dam, especially in the upstream region. Key words: one-dimensional model, seismic analysis, earth dams, heterogeneous cross sections, total stress, effective stress, liquefaction.

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