Spatial Variability of Material Parameter and Bearing Capacity of Clay

2012 ◽  
Vol 629 ◽  
pp. 433-437 ◽  
Author(s):  
Md Mizanur Rahman ◽  
Hoang Bao Khoi Nguyen
Keyword(s):  
Spatial Variability ◽  
Bearing Capacity ◽  
Correlation Length ◽  
Material Parameter ◽  
Vertical Direction ◽  
Undrained Shear Strength ◽  
Element Analysis ◽  
Correlation Lengths ◽  
The Finite Element Analysis ◽  
Spatial Correlation Length

A stochastic analysis that incorporates spatial variability of material parameter of clay i.e. undrained shear strength, c within the finite element analysis was done. A smoother change of c between two neighbouring soil elements is expected than two elements at a distance apart, thus a spatial correlation length is used within the random field to describe the distance over which random values tend to be correlated. When the correlation lengths in horizontal and vertical directions are same, the soil elements can be described ‘isotropic’. Most of the previous studies investigated the effect of variation of c in terms of coefficient of variation, COV (standard deviation/mean) and the isotropic correlation length on bearing capacity. However, the correlation length of soil may not be isotropic as they may be deposited in layers i.e. correlation length in horizontal direction may be higher than that in vertical direction. Thus, this study investigated the effect of isotropic as well as anisotropic (in terms of correlation length) conditions and their lengths over a range of COV of c on the bearing capacity. The result of this study would help to understand the effect of soil anisotropy on bearing capacity.

Spatial correlation length of normalized cone data in sand: case study in the north of Denmark

2014 ◽  
Vol 51 (8) ◽  
pp. 844-857 ◽  
Author(s):  
S. Firouzianbandpey ◽  
D.V. Griffiths ◽  
L.B. Ibsen ◽  
L.V. Andersen
Keyword(s):  
Spatial Correlation ◽  
Correlation Length ◽  
Vertical Direction ◽  
Cone Penetration ◽  
Correlation Lengths ◽  
Cone Penetration Testing ◽  
The North ◽  
Site Investigations ◽  
Depositional Process ◽  
Spatial Correlation Length

The main topic of this study is to assess the anisotropic spatial correlation lengths of a sand layer deposit based on cone penetration testing with pore pressure measurement (CPTu) data. Spatial correlation length can be an important factor in reliability analysis of geotechnical systems, yet it is rarely estimated during routine site investigations. Results from two different sites in the north of Denmark are reported in this paper, indicating quite strong anisotropy due to the depositional process, with significantly shorter spatial correlation lengths in the vertical direction. It is observed that the normalized cone resistance is a better estimator of spatial trends than the normalized friction ratio.

With Different Axial Compression, the Finite Element Analysis of Concrete Frame Column that Reinforced by Assemble Inclined Web Steel Truss

2014 ◽  
Vol 1079-1080 ◽  
pp. 177-182
Author(s):  
Shao Wu Zhang ◽  
Ying Chuan Chen ◽  
Geng Biao Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Simulation Analysis ◽  
Hysteresis Curve ◽  
Element Analysis ◽  
Concrete Frame ◽  
The Finite Element Analysis ◽  
Steel Truss

In order to study the performance of concrete frame columns that reinforcedby assembleinclined web steel truss, with the same reciprocatinghorizontal displacement and different axialcompression.It canbe calculate the mechanical behavior of concrete frame columns and reinforced columns by using the finite element analysis software ABAQUS. Simulation analysis shows that the bearing capacity ofreinforced columnshas greatly increased andpresented a full hysteresis curve. The result shows that the reinforcement method of assemble inclined web steel truss can greatly improve the bearing capacity and ductility of the concrete frame column, and the axial compression is larger, the better the reinforcement effect.

The Finite Element Analysis of Plate's Distance on Push-Extend Multi-under-Reamed Pile

2012 ◽  
Vol 468-471 ◽  
pp. 2517-2520 ◽  
Author(s):  
Xin Ying Xie ◽  
Xin Sheng Yin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Element Analysis ◽  
Elastic Plastic ◽  
The Finite Element Analysis ◽  
Plastic Theory

In this paper ,it analyses the push-extend multi-under-reamed pile in use of elastic-plastic theory by the software ANSYS.It takes four push-extend multi-under-reamed piles which are the same except plates' distance.It introduces the realative theory to make the anlysis much more accuracy.The results which is taken by ANSYS are researched to find out the regularity and can certain the reasonable plate's distance to anlyze the bearing capacity of push-extend multi-under-reamed pile at the same time.

The Finite Element Analysis on Axial Tensile Bearing Capacity of Round Steel-Tubes Reinforced with CFRP Sheets

2011 ◽  
Vol 368-373 ◽  
pp. 1595-1599
Author(s):  
Xiu Li Wang ◽  
Jun Jie Li
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Large Scale ◽  
Steel Tubes ◽  
Element Analysis ◽  
Cfrp Sheets ◽  
Finite Element Software ◽  
Axial Tensile ◽  
The Finite Element Analysis ◽  
Circumferential Reinforcement

The numerical simulation calculation on round steel-tubes reinforced with CFRP sheets was done through the large-scale finite element software ANSYS. In this research, four factors were comparatively analyzed so as to obtain the influence of them on ultimate axial tensile bearing capacity of steel-tubes. These four factors are longitudinal reinforcement length rate , thickness , elastic modulus and circumferential reinforcement ways of CFRP sheets. The results show that the ultimate axial tensile bearing capacity of steel-tubes strengthened with CFRP sheets is enhanced significantly and the reinforcement effect is very good.

scholarly journals Finite Element Analysis for Whole Machine of Link-Type Ladle Turret

2011 ◽  
Vol 2-3 ◽  
pp. 861-864
Author(s):  
Ling Ling Li ◽  
Guang Pu Xu ◽  
Bing Bing Cui
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Molten Steel ◽  
Mechanical Analysis ◽  
Maximum Displacement ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Capacity Calculation ◽  
Dip Angle

The mechanism withstands 220t high temperature molten steel. In case of damage, molten steel pours. There will be major security incidents. Therefore, it is necessary to calculate carrying capacity of the mechanism. However, the part of components of the mechanism is made up of a crisscross of steel plate. This is used to withstand the bending and stretching. If we rely on traditional mechanical analysis, a large number of simplifying must be adopted, and accuracy of the calculation can be reduced. Therefore, this paper uses the COSMOSWorks Plug-in of SolidWorks software to carry out finite element calculation of whole machine for the mechanism. It avoids these shortcomings mentioned above. And this makes bearing capacity calculation to be more close to the actual circumstances. And the results show that: (1) the maximum stress of parts in the mechanism is only 52.8Mpa and much less than permissible stresses of its materials. As a result, the mechanism has sufficient bearing capacity. (2) The maximum displacement of whole machine is 2.637 mm. And the displacement will cause dip angle when lifting molten steel and it is less than its allowable stiffness. Therefore, the deformation is to meet requirements for the mechanism. In conclusion, the finite element analysis of the whole machine avoids complex force analysis and simplification of structure. The calculation has high accuracy. It is one of effective methods in the design of intensity and stiffness of complex structures.

Buckling Analysis of Double-Limb Lipped Channel Section Member under Axial Load

2011 ◽  
Vol 243-249 ◽  
pp. 268-273
Author(s):  
Qing Ma ◽  
Jin Song Lei ◽  
Wen Zhi Yin
Keyword(s):  
Bearing Capacity ◽  
Axial Load ◽  
Slenderness Ratio ◽  
Ultimate Bearing Capacity ◽  
Thickness Ratio ◽  
Distortional Buckling ◽  
Element Analysis ◽  
Channel Section ◽  
The Finite Element Analysis ◽  
Breadth Ratio

Double-limb lipped channel section steel member is formed by connecting two single limb members with bolts in order to improve the buckling performance. In order to research the buckling form and ultimate bearing capacity of members with different slenderness ratios under axial load, nonlinear analysis of buckling performance is done to this kind of section using the finite element analysis software ANSYS. The influence on bearing capacity caused by height-breadth ratio of section, height-thickness ratio of web and breadth-thickness ratio of flange is analyzed. The results show that: (1) for larger slenderness ratio, complete buckling occurs to the column mainly and the slenderness ratio has larger influence on buckling bearing capacity, while for smaller slenderness ratio, local distortional buckling occurs more; (2) in a certain range, the increase of height-breadth ratio could raise the ultimate bearing capacity of member, but excessive height-breadth ratio would make the ultimate bearing capacity decrease, (3) the increase of both height-thickness ratio and breadth-thickness ratio would decrease the ultimate bearing capacity.

Finite Element Method Based Evaluation of Bogie Bolster Design

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
Rakesh Pokkula ◽  
T.V.K. Gupta
Keyword(s):  
Finite Element ◽  
Weight Reduction ◽  
Vertical Direction ◽  
Load Carrying Capacity ◽  
Element Analysis ◽  
Railway Industry ◽  
The Finite Element Analysis ◽  
Load Carrying ◽  
Static Conditions ◽  
Ansys Workbench

The requirement of increased turn around time and higher pay-load carrying capacity, weight reduction of components and systems is having much attention in railway industry. The present paper discusses about the Finite Element Analysis (FEA) carried out using ANSYS workbench on the modified design of a bolster in light weight freight bogies. The reduction in weight transforms into higher performance leading to lower power consumption. With this present study, although the modified bolster has not undergone any significant weight reduction, but the modifications in design has lead to increase in stiffeness and reduction in stresses generated for various loading conditions. Presently, bolsters fitted with wagons in Indian Railways are in operational for 20.32t to 22.9t axle load capacities for a variety of applications. The existing and modified bolsters are analysed in static conditions for different loads which includes a vertical load on centre plate, transverse loading and side bearing loading and a comparison has been made. The results on the modified bolster has shown 11% higher bending stiffness in vertical direction at the centre and 9% higher stiffness in tranverse direction as compared to the existing bolster.

Undrained capacity of circular shallow foundations on two-layer clays under combined VHMT loading

2022 ◽  
Author(s):  
Pengpeng He ◽  
Tim Newson
Keyword(s):  
Bearing Capacity ◽  
Effective Area ◽  
Undrained Shear Strength ◽  
Chemical Processes ◽  
Shallow Foundations ◽  
Interface Condition ◽  
Failure Envelope ◽  
Limit States ◽  
Element Analysis ◽  
Clay Deposits

Wind turbines are typically designed based on fatigue and serviceability limit states, but still require an accurate assessment of bearing capacity. Overconsolidated clay deposits in Canada often have a thin layer of crust with a relatively high undrained shear strength developed from weathering, desiccation, and geo-chemical processes. However, existing design methods only assess the bearing capacity using effective area and inclination factor without consideration of surficial crusts. This paper studies the undrained VHMT (vertical, horizontal, moment and torsional) failure envelope of circular foundations founded on a surficial crust underlain by a uniform soil with a zero-tension interface condition using finite element analysis. An analytical expression for the VHMT failure envelope is derived.

Finite Element Analysis of Recycled Concrete Filled Circular Steel Tubular Stub Columns under Compressive Loading

2014 ◽  
Vol 578-579 ◽  
pp. 263-268
Author(s):  
Bing Li ◽  
Qi Zhang ◽  
Shuang Meng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Compressive Loading ◽  
Recycled Concrete ◽  
Constitutive Relationship ◽  
Element Analysis ◽  
Short Columns ◽  
The Finite Element Analysis ◽  
Modified Formula

The paper achieved the nonlinear analysis of bearing capacity of recycled concrete filled steel tubular short columns by using finite element analysis software ABAQUS. In order to meet the finite element analysis the writer put forward the modified formula of recycled concrete constitutive relationship of core, and elaborate d the contact at the interface of steel tube and the core concrete and related modeling points. Finally the load-deformation curves of the finite element analysis and test results coincide well. It indicates that the modified formula of recycled concrete constitutive relationship can better meet the requirements of analyzing bearing capacity of recycled concrete filled circular steel tubular columns under compressive Loading by using ABAQUS. Through the simulation experiment, it is useful for us to obtain the ultimate reliable bearing capacity of the similar structure member.

Design and Analysis of Hydrostatic Bearing Slide Used Linear Motor Direct-Drive

2011 ◽  
Vol 211-212 ◽  
pp. 666-670
Author(s):  
Guo An Hou ◽  
Tao Sun
Keyword(s):  
Dynamic Performance ◽  
Vertical Direction ◽  
Linear Motor ◽  
Analysis Method ◽  
Direct Drive ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Linear Encoder ◽  
Linear Slide ◽  
Very High

This paper discusses the design and analysis of a direct-drive linear slide used linear mortor. The alloy steel carriage is fully floated by twelve hydrostatic bearings, and it is force-closed. It has very high stiffnesses, 1700N/mm in vertical direction and 690N/mm in horizontal direction. The working stroke of slide is 200 mm. The slide is driven by a ironless linear motor. The optic linear encoder was used for the measurements and feedback. To analyze the static and dynamic performance of the slide, the modelling and simulation process, using the finite element analysis method, is presented.

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