scholarly journals Influence of Shear Strength of Soil on Stresses in Footing-A Review

2021 ◽  
Author(s):  
Aleena Sam ◽  
Arunima Anil A ◽  
Smitha Anna Kurian ◽  
Sujina Kabeer ◽  
Jayamohan J ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Strength ◽  
Numerical Analysis ◽  
Simulation Analysis ◽  
Flexural Rigidity ◽  
Bending Moment ◽  
Approximate Solutions ◽  
Strength Analysis ◽  
Element Method

Shear strength characteristics of soil beneath the footing play a salient role on the stresses developed in the footing. In the design of foundation, it is imperative to analyse the stresses developed in it to prevent failures. Estimation of the influence of shear strength of underlying soil and flexural rigidity of footing on the shear force and bending moment developed in the foundation is necessary for effective determination of stress. Unlike conventional experimental methods, numerical analysis using Finite Element Method based geotechnical software like PLAXIS, FLAC, MIDAS etc. enables the analysis of foundations with complex stress characteristics. Finite Element Method (FEM) is a numerical analysis procedure that provides approximate solutions to various problems associated in the field of geotechnical engineering. This paper critically reviews the current literature on numerical methods to investigate the influence of shear strength of supporting soil on the structural forces developed in a footing. The relevance of the present approach to the concept of shear strength analysis is scrutinised by various numerical simulation analysis software.

Deformation Behavior of Bellows Pipes for Laying Cables Under Ground by Axial Load and Bending Moment

2005 ◽  
Author(s):  
Satoshi Tehara ◽  
Hisashi Naoi ◽  
Hideki Okada ◽  
Makoto Osaku
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Deformation Behavior ◽  
Axial Load ◽  
Bending Moment ◽  
Bending Test ◽  
Ground Subsidence ◽  
Buried Pipe ◽  
Element Method

Recently, electricity demand is rising steeply with advance of science. Additionally quantity of cables such as telephone and optical fiber is rising with communications development and increase of residence. These cables are untidily wired in the air with telephone pole. They impair cityscape and disturb pedestrian safety. Therefore improvement of procedures installing cables is requested. In order to solve it, the plan [1] which buries cables protected in pipes under ground is progressing. They are called buried pipes and consist of straight pipe made from stainless steel or plastic. However there is concern that the buried pipe is crushed and broken by the complex load due to earthquake and ground subsidence. Thus, it is necessary to develop the buried pipe with function of flexibly against damage or rupture. We focus attention to U-type bellows pipe with function of flexibly. In this study, we conduct tensile, compressive, bending test and numerical analysis of those tests using finite element method. From result, we investigate for the relationship between mechanical characteristic and deformation behavior. We study application of bellows pipe to buried pipe. In this study, we examined and analyzed deformation behavior when axial load and bending moment were given to specimens. Examinations items are as (1) we measured load, elongation bending radius by using are experimental device which modeled ground subsidence. (2) We obtained deformation behavior by numerical analysis by using constituted equations of solid mechanics. (3) We conducted simulation analysis of models constructed by finite element method. By comparing these three items, the deformation behavior is clarified.

scholarly journals A Coupled Discrete-Finite Element Method for Shear Strength Analysis of Geogrid-Reinforced Railway Ballast

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Danyang Ji ◽  
Zheng Ma ◽  
Junjie Zhou ◽  
Yajun Li ◽  
Shuai Shao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Strength ◽  
Contact Force ◽  
Strength Analysis ◽  
Force Model ◽  
Railway Ballast ◽  
Pull Out ◽  
Discrete Finite Element ◽  
Element Method

This paper presents a coupled discrete-finite element method for the investigation of shear strength of geogrid-reinforced ballast by direct shear tests and pull-out tests. The discrete element method (DEM) and finite element method (FEM) are employed to simulate ballast and geogrid, respectively. Irregularly shaped ballast particles are modeled with clumps, and the nonlinear contact force model is used to calculate contact force between particles. Continuum geogrid is modeled by a two-node beam element with six degrees of freedom. A contact algorithm based on the static equilibrium is proposed at the geogrid-ballast contact surface. The simulation results indicate that shear strengths increase with the installation of geogrid. Moreover, ballast particle displacements and nominal volumetric strains are analyzed to provide a microscopic view on the mechanism of the reinforcement effect of geogrid.

scholarly journals A strength analysis of conventional and sandwich plate deck using finite element method

2021 ◽  
Vol 1034 (1) ◽  
pp. 012026
Author(s):  
Abdi Ismail ◽  
Achmad Zubaydi ◽  
Bambang Piscesa ◽  
Ervan Panangian ◽  
Rizky Chandra Ariesta ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sandwich Plate ◽  
Strength Analysis ◽  
Element Method

NUMERICAL ANALYSIS OF THE FINITE ELEMENT METHOD APPLIED TO THE BOLTZMANN-POISSON SYSTEM

1995 ◽  
Vol 05 (03) ◽  
pp. 351-365 ◽  
Author(s):  
V. SHUTYAEV ◽  
O. TRUFANOV
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Semiconductor Device ◽  
Initial Boundary ◽  
Initial Boundary Value Problem ◽  
Poisson System ◽  
The Finite Element Method ◽  
Initial Boundary Value ◽  
Element Method

This paper is concerned with the numerical analysis of the mathematical model for a semiconductor device with the use of the Boltzmann equation. A mixed initial-boundary value problem for nonstationary Boltzmann-Poisson system in the case of one spatial variable is considered. A numerical algorithm for solving this problem is constructed and justified. The algorithm is based on an iterative process and the finite element method. A numerical example is presented.

Finite Element Method-based geomechanical risk assessment of underground laboratory located in the deep copper mine

2021 ◽  
Author(s):  
Krzysztof Fulawka ◽  
Witold Pytel ◽  
Piotr Mertuszka ◽  
Marcin Szumny
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
New Technologies ◽  
Radiation Detection ◽  
Underground Laboratory ◽  
Design Stage ◽  
Copper Mine ◽  
Geophysical Surveys ◽  
Element Method

<p>Underground laboratories provide a unique environment for various industries and are a suitable place for developing new technologies for mining, geophysical surveys, radiation detection, as well as many other studies and measurements. Unfortunately, any operation in underground excavations is associated with exposure to many hazards not necessarily encountered in surface laboratories. One of the most dangerous events observed in underground conditions is the dynamic manifestation of rock mass pressure in form of rockburst, roof falls and mining tremors. Therefore, proper evaluation of geomechanical risk is a key element ensuring the safety of work in underground conditions. Finite Element Method-based numerical analysis is one of the tools which allow conducting a detailed geomechanical hazard assessment already at the object design stage. The results of such calculations may be the basis for the implementation of preventive measures before running up the underground facility.</p><p>Within this paper, the three-dimensional FEM-based numerical analysis of large-scale underground laboratory located in deep Polish copper mine was presented. The calculations were made with GTS NX software, which allowed determining the changes in the safety factor in surrounding of the analyzed area. Finally, the possibility of underground laboratory establishment, with respect to predicted stress and strain conditions, were determined.</p>

Sign in / Sign up

Export Citation Format

Share Document