Analysis of Embankment Supported by Rigid Inclusions Using Plaxis 3D

A rigid inclusion-supported embankment is used to overcome the problems of soft soils. This system is considered complex due to the various interactions between its elements, namely the embankment body, load transfer platform, geogrid layers, piles, and soft soils. The load transfer mechanism is based on the phenomenon of soil arching, the tension in the geogrid layers, support of the soft soils, and friction between piles and soft soil. In this paper, the first part highlights the behaviour of a rigid inclusion-supported embankment validated by field measurements, and the contribution of rigid inclusions technology to the reduction of settlement and creep settlement. In addition, the effect of geogrid in improving the load efficiency and reducing the settlements is presented. In the second part, a comparison is made between many analytical design methods and a three-dimensional finite element analysis method. The results show the inconsistencies between the analytical methods in calculating the load efficiency and the tension in the geogrid.

Three-dimensional finite element modelling of a full-scale geosynthetic-reinforced, pile-supported embankment

Canadian Geotechnical Journal ◽

10.1139/cgj-2014-0506 ◽

2015 ◽

Vol 52 (12) ◽

pp. 2041-2054 ◽

Cited By ~ 68

Author(s):

R. Kerry Rowe ◽

K.-W. Liu

Keyword(s):

Finite Element ◽

Soft Soil ◽

Three Dimensional ◽

Single Layer ◽

Full Scale ◽

Numerical Results ◽

Element Analysis ◽

Three Dimensional Finite Element ◽

Pile Supported Embankment

The performance of four sections of a full-scale embankment constructed on soft soil is examined using a fully coupled and fully three-dimensional finite element analysis. The four sections had similar embankment loadings but different improvement options (one unimproved, one with pile-support only, one with a single layer geotextile-reinforced platform and pile-support, and one with two layers of geogrid-reinforced platform and pile-support). Like the field data, the numerical results show that the inclusion of piles decreases the settlement at the subsoil surface to 52% of that for the unimproved section, and the addition of a single layer of geotextile reinforcement (J = 800 kN/m) further reduced settlement to only 31% of that of the unimproved section. The effects of geosynthetic reinforcement and multiple layers of reinforcement on the performance of the pile-supported embankment are discussed. The relative load transfer is calculated using eight existing methods and they are compared with the field measurements and numerical results.

Load Transfer Analysis of Cracked Bolted Joints

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.118-120.147 ◽

2010 ◽

Vol 118-120 ◽

pp. 147-150

Author(s):

Da Zhao Yu ◽

Yue Liang Chen ◽

Yong Gao ◽

Wen Lin Liu ◽

Zhong Hu Jia

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Load Transfer ◽

Three Dimensional ◽

Element Model ◽

Bolted Joints ◽

Bolted Joint ◽

Element Analysis ◽

Three-dimensional finite element model of a cracked bolted joint has been developed in the non-linear finite element code MSC.Marc and attempts were made to validate it by comparing results with those of experiments and other finite element. Issues in modeling the contact between the joint parts, which affect the accuracy and efficiency of the model, were presented. Experimental measurements of load transfer were compared with results from finite element analysis. The results show that three-dimensional finite element model of cracked bolted joint can produce results in close agreement with experiment. Three-dimensional effects such as bolt titling, seconding and through-thickness variations in stress and strain are well represented by such models. Three-dimensional finite element analysis was also used to study the effects of hole mod and crack on the load transfer behaviour of single lap bolted joints. The results show that hole mode has big effect on load transfer of cracked bolted joint. In the whole progress of crack growth, the load transfer through bolt 1 decrease, and almost all of the load duduction of bolt 1 transfer into blot 2 rather than into bolt 3.

Numerical Simulation of Breakwaters for Land Reclamation

Volume 7: Offshore Geotechnics; Petroleum Technology ◽

10.1115/omae2009-79017 ◽

2009 ◽

Author(s):

Jian-Min Zhang ◽

Jianhong Zhang ◽

Gang Wang ◽

Yang Chen

Keyword(s):

Land Reclamation ◽

Southern China ◽

Soft Soil ◽

Three Dimensional ◽

Marine Clay ◽

Element Analysis ◽

Reclamation Project ◽

The Moment ◽

This paper highlights some practical considerations of soil structure interactions in the design of the breakwater for a land reclamation project at Da Ya Bay, Southern China sea, through three-dimensional finite element analysis. A pile-breakwater-foundation system is evaluated during its construction and after construction has been completed. The maximum deflections and moments of the piles take place in the soft marine clay underneath the breakwater. The deformation of the soft soil imposes great impact on the slender pile. Based on the study, it is considered inadequate to solely increase the density and stiffness of the piles, as it will not effectively reduce the deformation of the foundation as well as the moment of the pile. On the contrary, the increased stiffness results in significant increase of the stresses in the pile. Consequently, the deformation of pile should be evaluated in terms of interactions between soil and pile. Improvement of the soft marine clay is also of great importance.

Effect of Dowel Looseness on Response of Jointed Concrete Pavements Using Three-Dimensional Finite Element Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.900.435 ◽

2014 ◽

Vol 900 ◽

pp. 435-444 ◽

Cited By ~ 2

Author(s):

How Bing Sii ◽

Gary W. Chai ◽

Rudi van Staden ◽

Hong Guan

Keyword(s):

Finite Element ◽

Load Transfer ◽

Three Dimensional ◽

Element Analysis ◽

Worst Case ◽

Loading Case ◽

Wheel Loading ◽

Base Course ◽

This paper evaluated an effect of dowel looseness on response of jointed concrete pavement using 3D finite-element analyses of rigid pavement systems that relies on an embedded formulation of a beam element. This embedded element allows the efficient modelling of dowel looseness using nodal contact approach and permits the dowels to be exactly located irrespective of the slab mesh lines. These studies indicate that significant reduction in load transfer efficiency and increase in both slab and base course stresses can be expected due to small gaps varies from 0.25 to 1.25mm between the dowels and the slabs. For the worst case the LTE were reduced to 11.3% and 11.6% respectively for single wheel loading and odd dual wheel loading case while there were voids present at the base course layer for 1.25 cases 4.

Study of Load Transfer Parameter in AASHTO Design Guide for Concrete Pavement

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1629-01 ◽

1998 ◽

Vol 1629 (1) ◽

pp. 1-5

Author(s):

Chen-Ming Kuo

Keyword(s):

Load Transfer ◽

Three Dimensional ◽

Design Parameters ◽

Concrete Pavements ◽

Element Analysis ◽

Transfer Parameter ◽

Joint Width ◽

Pavement Structures ◽

Some of the design parameters in AASHTO’s Guide for Design of Pavement Structures require experienced engineering judgment to obtain adequate designs. The load transfer parameter for concrete pavements in the AASHTO Guide is reviewed. A set of equations was developed to assist in choosing a J-factor for various pavement conditions. With three-dimensional finite element analysis, factorial runs were conducted to find the relationships between the critical stresses and joint design parameters—that is, joint width, diameter, length, and spacing of dowel bars. Extended procedures that incorporate dowel parameters into the J-factor were proposed. Conclusions were made to clarify the load transfer concept in the current AASHTO Guide and the effects of joint parameters on pavement performance.

Stress and Strain Distribution Patterns in Bone around Tissue- and Bone-Level Implant-Supported Mandibular Overdentures Using Three-Dimensional Finite-Element Analysis

Journal of Long-Term Effects of Medical Implants ◽

10.1615/jlongtermeffmedimplants.2019031747 ◽

2019 ◽

Vol 29 (3) ◽

pp. 175-181

Author(s):

Farhad Hajizadeh ◽

Sanaz Panahi

Keyword(s):

Finite Element Analysis ◽

Strain Distribution ◽

Three Dimensional ◽

Distribution Patterns ◽

Stress And Strain ◽

Element Analysis ◽

Bone Level ◽

Three Dimensional Finite Element ◽

Stress And Strain Distribution

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

Tire Science and Technology ◽

10.2346/1.2768607 ◽

2007 ◽

Vol 35 (3) ◽

pp. 226-238 ◽

Cited By ~ 1

Author(s):

K. M. Jeong ◽

K. W. Kim ◽

H. G. Beom ◽

J. U. Park

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Element Model ◽

Radial Force ◽

Element Analysis ◽

The Finite Element Analysis ◽

Force Variation ◽

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.