Numerical Study of Excavation In Soil Clay Support by Piles with Anchors

Walls piles supported with Anchors are considered one of most ways of engineering supporting widespread. This research includes studying the behaviorof walls pile, through a numerical parametric study using the (plaxis / 2D) program. the study includes the most influencing factors which include:(the angle of the inclination, the vertical spacing between the rows of Anchors andthe distance of the first row of anchors from the ground surface). The effect of these factors on the stability of the wall was studied.Where they give the best effect to the anchors and ensure the best possible positioning which contributes to reducing the economic cost of this constructions.

A 2D numerical analysis by using the Finite Elements Method of the Modeling Methods of Closed Shield Tunneling and the Surface Subsidence induced by that

In this paper, the modeling methods of tunneling and the surface subsidence induced by that have been studied by using two-dimensional numerical analysis according to the FEM method, assuming the green field condition، which means that there is no load on the soil surface above the tunnel. A FE study was conducted in which an elasto-plastic constitutive model was adopted to model the soil behavior (HS, HSsmall). This article includes a comparison between the results of numerical analysis and field measurements to executed projects، and a suggested method for modeling tunnel excavation and surface subsidence induced by that.

Study the effect of changing the different engineering parameters on the performance of the joints used in the metal structures on fire to find their optimal designs by CAD

This research presents a study with the help of Finite Element Method and the use of CATIA V5 program to know the behavior of a permissible link - column used in metal structures at high temperatures (on fire). In this article we will present an analysis using the finite element method using the CATIA V5 program for the effect of different engineering parameters (plate thickness, screw diameter, reinforcement nerves) on the behavior of joints used in metal structures on fire. We also studied the effect of the number of bolts on the stresses and transitions in the link and their comparison with the welding cases. We studied and analyzed the studied model and obtained the deformation and failure schemes at high temperatures, the flow charts and the temperatures that show the behavior of this link to the fire. We also obtained the stress and strain schemes for the link and the transport and load schemes at different temperatures and the behavior of this link at these different temperature.

Numerical Analysis on Performance of strip footing on Clay Soil reinforced with Geogrid bags

This research study aims at investigating the potential benefits of using the reinforcement to improve the bearing capacity and reduce the settlement of strip footing on clay. To implement this objective, many numerical 2D-analyses by finite element method / Plaxis program were performed to study the behavior of reinforced soil foundation. And then we carry out a parametric study of the most effective parameter on bearing capacity. The results showed that the inclusion of reinforcement can significantly improve the bearing capacity and reduce the footing settlement. The strain developed along the reinforcement is directly related to the settlement. The results also showed that the inclusion of reinforcement can redistribute the applied load to a wider area, thus minimizing stress concentration and achieving a more uniform stress distribution. The redistribution of stresses below the reinforced zone can result in reducing the settlement of the underlying weak clayey soil.

Modeling of sloshing in moving cylindrical containers by using ANSYS program

This research is concerned in modeling the problem of sloshing in moving cylindrical containers in ANSYS program where we model the problem on a partially filled cylinder then we find the resonant frequencies in addition to study the interaction between the cylinder and the fluid.

Programming Solutions for Some Nonlinear Partial Differential Equations

In this work, we present programming solutions for some nonlinear partial differential equations, which are the advection equation, the third-order KdV equations, and a family of Burgers' equations.

Numerical study of the use of Non-destructive Impact Test methods for the exam of integrity of concrete piles

This research includes a numerical study using Finite Element Method aims to evaluate the ability and accuracy of using Non-destructive Impact Response Method in the assessment of length and cross-sections of intact concrete pile (not deformed) in both time and frequency domains. Therefore, an appropriate numerical model depends on the modeling of both impact force (impulsive load) and distributing medium (pile + soil) and insert them in computing software ABAQUS was carried out. The numerical model was verified corresponding to field measures obtained from literature review and the results showed good agreement between measures and numerical results. Furthermore, the model was applied on a typical example in order to study vibration distribution in the pile due to impulsive load applied on pile top. Mechanical response curve of intact pile was obtained. Then, both of length and cross-section area of the pile were determined. Finally, parametrical study of most important factors (stiffness of soil surrounding the pile and length of pile embedded in the soil) effect on vibration distribution resulted from impulsive load applied on pile top. The parametrical study was carried out in two domains; first one was time domain depending on the direct analysis of particle displacement and velocity and the second was frequency domain depending on analysis of pile mechanical response curve. The results of this research enables to use the proposed numerical model to numerically obtain the time history of particle displacement and velocity in addition to the curve of mechanical response computed in the pile top and forms reference diagrams which is used later to compare with similar diagrams resulted from field test of executed piles. As a result, pile integrity test and detecting of defects in the piles if any. In addition, the limits of the use of both analysis methods adapted in research and choose the best between them according to the case study.

Algorithm to solve nonlinear Advection Equation numerically using cubic Bspline

In this paper, we introduce an algorithm to solve the Advection equation by finite element method. In this method, we have chosen Three pattern of cubic B-Spline to approximate the nonlinear solution to convert the nonlinear PDE into a system of ODE, Then we solved this system equation by SSP-RK54 method, And we made a program implementing this algorithm and we checked the program using some examples, which have exact solutions, then we evaluate our results. As a conclusion we found that this method gives accurate results for advection equation.

Evaluation of stress distribution on peri-implant bone with "All-on-4" concept in the mandible by finite element analysis

3D finite elements analysis study aims to conduct a biomechanical comparison between two cantilever’s lengths with two different degrees of tilting the implants.

المدعومة بالزرعات باستخدام طريقة العناصر المنتهية 33 Study the effect of alveolar ridge shape on stress distribution in mandibular removable partial implant – supported dentures using a finite element method.

This study aims to investigate the effect of the alveolar ridge shape in the distribution of stress at the lower removable partial dentures supported by implants using a finite element method, with four models for a half mandible are designed with a free end saddle using an ANSYS program and Canine was abutment, where the remaining ridge is representing the four alveolar ridge shapes (horizontal and distal descending and concave and distal ascending), two removable partial dentures were designed for each model one supported by tooth and fibromucosa and another one supported by tooth and implant, it has been applied a load of 50 Newton on all models and has been studied stress equivalent for each model.