Steel Cofferdam Design and Calculation for High Pile Cap Construction

2011 ◽  
Vol 255-260 ◽  
pp. 1879-1884
Author(s):  
Gui Yun Xia ◽  
Mei Liang Yang ◽  
Chuan Xi Li ◽  
Shang Wu Lu
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Structural Strength ◽  
General Purpose ◽  
Structural Safety ◽  
Pearl River ◽  
Guangzhou City ◽  
Finite Element Software ◽  
Pile Cap ◽  
Calculating Model

Using the steel cofferdam of Xinzhao Pearl River Bridge in Guangzhou City as the engineering background, structural designing and size proposing of steel cofferdam are introduced briefly. To ensure structural safety, general purpose finite element software Ansys was used to analyze structural strength and stability. Load styles and boundary conditions were also discussed. 6 load cases with calculating model were presented.

Three-Dimensional FEM Simulation of the Ship-Bridge Collision

2013 ◽  
Vol 405-408 ◽  
pp. 3243-3247
Author(s):  
Wei Su ◽  
Ying Sun ◽  
Shi Qing Huang ◽  
Ren Huai Liu
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Reference Values ◽  
Large Scale ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Structural Safety ◽  
Fem Model ◽  
Finite Element Software

In this paper, the structural safety of the Niuwan Bridge subjected to vessel collision is investigated by the large-scale commercial finite element software ANSYS. A whole FEM model is built and a reasonable analysis and illustration for taking the value of vessel-collision forces is presented. Additionally, under the premise of reasonable simulation of the boundary conditions, the effects of the support abutments, the prestress and the carloads are considered. The analysis results have certain reference values for the anti-collision and reinforcement of bridges.

Steel Plates Subjected to Uniform Blast Loading

2011 ◽  
Vol 108 ◽  
pp. 35-40 ◽  
Author(s):  
A. Vatani Oskouei ◽  
F. Kiakojouri
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Steel Plate ◽  
Blast Loading ◽  
General Purpose ◽  
Steel Plates ◽  
Finite Element Software ◽  
Mesh Dependency ◽  
Load Pattern ◽  
Insight Into

In this study, for behavior of steel plate which subjected to uniform blast loading the general purpose finite element software ABAQUS, was used. The aim of this paper is to recognize the effect of stiffener configurations, boundary conditions, mesh dependency, load patterns, geometry of plates and damping on dynamic response of the plates. Special emphasis is focused on the evolution of mid-point displacements. The results show that stiffener configuration and boundary conditions have a significant influence on the response, while the effects of damping and load pattern on maximum response are negligible. The results obtained allow an insight into the effect of stiffener configurations and other parameters on the response of the plates under uniform blast loading.

Finite Element Analysis of Double-Walled Steel Box Cofferdam

2011 ◽  
Vol 368-373 ◽  
pp. 2268-2273
Author(s):  
Mei Liang Yang ◽  
Zhen Hai Zeng ◽  
Fang Ping Zhong ◽  
Dan Chen
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Complex Stress ◽  
General Purpose ◽  
Good Effect ◽  
Stress And Strain ◽  
Element Analysis ◽  
Finite Element Software ◽  
Pile Cap ◽  
Practical Engineering

Steel cofferdam has an abroad application in high pile cap construction in deep water foundations. Because of the obvious three-dimensional effect and its complex stress and strain, the traditional simplified calculating method couldn’t reach the requirements of practical engineering. The general purpose finite element software Ansys was used to analyze the stress and strain of steel cofferdam and sealing concrete, and achieved a good effect to ensure the engineering safety.

Optimal Design of the Large-Diameter Spinning Torispherical Head

2012 ◽  
Vol 544 ◽  
pp. 194-199
Author(s):  
Di Zhang ◽  
Shui Ping Sheng ◽  
Zeng Liang Gao
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Large Diameter ◽  
General Purpose ◽  
Design Tool ◽  
Crown Area ◽  
Finite Element Software ◽  
The Stability

Two important parameters of torispherical head that are (interior radius of spherical crown area) and r (interior radius of transition corner) have been optimized by the module of the large general-purpose finite-element software ANSYS, targeting the strength and stability of the head. This paper provides an optimized torispherical head, which improves the stability of the edge of the head with acceptable strength of the head. The procedure is generally applicable as a design tool for optimal design.

Dynamic Instability Analysis and Design Charts of Curved Panels with Linearly Varying Periodic In-Plane Load

2021 ◽  
pp. 2150130
Author(s):  
G. Patel ◽  
A. N. Nayak ◽  
A. K. L. Srivastava
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Dynamic Instability ◽  
Excitation Frequency ◽  
Instability Region ◽  
Concentrated Load ◽  
Simply Supported ◽  
Finite Element Software ◽  
Design Charts ◽  
Curved Panels

The present paper reports an extensive study on dynamic instability characteristics of curved panels under linearly varying in-plane periodic loading employing finite element formulation with a quadratic isoparametric eight nodded element. At first, the influences of three types of linearly varying in-plane periodic edge loads (triangular, trapezoidal and uniform loads), three types of curved panels (cylindrical, spherical and hyperbolic) and six boundary conditions on excitation frequency and instability region are investigated. Further, the effects of varied parameters, such as shallowness parameter, span to thickness ratio, aspect ratio, and Poisson’s ratio, on the dynamic instability characteristics of curved panels with clamped–clamped–clamped–clamped (CCCC) and simply supported-free-simply supported-free (SFSF) boundary conditions under triangular load are studied. It is found that the above parameters influence significantly on the excitation frequency, at which the dynamic instability initiates, and the width of dynamic instability region (DIR). In addition, a comparative study is also made to find the influences of the various in-plane periodic loads, such as uniform, triangular, parabolic, patch and concentrated load, on the dynamic instability behavior of cylindrical, spherical and hyperbolic panels. Finally, typical design charts showing DIRs in non-dimensional forms are also developed to obtain the excitation frequency and instability region of various frequently used isotropic clamped spherical panels of any dimension, any type of linearly varying in-plane load and any isotropic material directly from these charts without the use of any commercially available finite element software or any developed complex model.

Numerical Simulation of Inner Support for Excavation Based on FEM Software ABAQUS

2012 ◽  
Vol 236-237 ◽  
pp. 632-635
Author(s):  
Yue Sun ◽  
Yue Nan Chen ◽  
Zhi Yun Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Computational Model ◽  
Dimensional Space ◽  
General Purpose ◽  
Two Dimensional ◽  
Clay Layer ◽  
Finite Element Software ◽  
Spring Element

In two-dimensional space, an elasto-plastic finite element computational model was established to simulate inner support for excavation on the basis of the general-purpose finite element software ABAQUS. The soil was assumed to be a uniform and normally consolidated clay layer and strut was discreted by spring element. Compared with published case study, it can be concluded that FEM software AQAQUS can present one reliable simulation progress of inner support for excavation.

EFFECT OF BOUNDARY CONDITIONS ON PROCESS- INDUCED STRESSES IN A PLAIN WEAVE UNIT CELL

2021 ◽  
Author(s):  
K. BUKENYA ◽  
M. N. OLAYA ◽  
E. J. PINEDA ◽  
M. MAIARU
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Process Modeling ◽  
Complex Geometry ◽  
Polymer Matrix Composites ◽  
Unit Cell ◽  
Modeling Framework ◽  
Element Analysis ◽  
Finite Element Software ◽  
Aerospace Applications

Woven polymer matrix composites (PMCs) are leveraged in aerospace applications for their desirable specific properties, yet they are vulnerable to high residual stresses during manufacturing and their complex geometry makes experimental results difficult to observe. Process modeling is needed to characterize the effects of the curing and predict end stress states. Finite element software can be used to model woven architectures, however accurate representation of processing conditions remains a challenge when it comes to selecting boundary conditions. The effect of BCs on process-induced stress within woven PMCs is studied. The commercial Finite Element Analysis (FEA) software Abaqus is coupled with user-written subroutines in a process modeling framework. A two-dimensionally (2D) woven PMC repeating unit cell (RUC) is modeled with TexGen and Abaqus. Virtual curing is imposed on the bulk matrix. The BC study is conducted with Free, Periodic, Flat, and Flat-Free configurations. Results show that the end stress state is sensitive to the boundary condition assumptions. Flat BC results show great agreement with Periodic BCs. Residual stress results from process modeling are then compared with a linear-elastic thermal cooldown analysis in Abaqus. Cooldown results indicate an overestimation in matrix stresses compared with process modeling.

scholarly journals Four Spacetime Dimensional Simulation of Rheological Waves in Solids and the Merits of Thermodynamics

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1376
Author(s):  
Áron Pozsár ◽  
Mátyás Szücs ◽  
Róbert Kovács ◽  
Tamás Fülöp
Keyword(s):  
Finite Element ◽  
Wave Propagation ◽  
Boundary Conditions ◽  
Numerical Scheme ◽  
Dispersion Error ◽  
Finite Element Software ◽  
Dimensional Simulation

The recent results attained from a thermodynamically conceived numerical scheme applied on wave propagation in viscoelastic/rheological solids are generalized here, both in the sense that the scheme is extended to four spacetime dimensions and in the aspect of the virtues of a thermodynamical approach. Regarding the scheme, the arrangement of which quantity is represented where in discretized spacetime, including the question of appropriately realizing the boundary conditions, is nontrivial. In parallel, placing the problem in the thermodynamical framework proves to be beneficial in regards to monitoring and controlling numerical artefacts—instability, dissipation error, and dispersion error. This, in addition to the observed preciseness, speed, and resource-friendliness, makes the thermodynamically extended symplectic approach that is presented here advantageous above commercial finite element software solutions.

A MIDAS Simulation Analysis of a Pile Cap’s Pipe Cooling Technology

2014 ◽  
Vol 614 ◽  
pp. 124-127
Author(s):  
Meng Kai Lin ◽  
Hai Lian Li
Keyword(s):  
Field Theory ◽  
Finite Element ◽  
Temperature Field ◽  
Temperature Difference ◽  
Simulation Analysis ◽  
Hydration Heat ◽  
Finite Element Software ◽  
Cooling Method ◽  
Pile Cap ◽  
Cooling Technology

Taking the concrete pouring for a passenger station’s pile cap as the research background, the paper establishes a model of pile cap’s hydration heat, by using the finite element software MIDAS. The paper also studies the main parameters and the temperature field theory which affect the hydration heat. It indicates that the pipe cooling method can significantly reduce the temperature difference between the inside and the outside when pouring massive concretes, and it is an effective way to prevent the generation of cracks.

A Finite Element Solution for Fully Intrinsic Plate Theory

2014 ◽  
Author(s):  
Zahra Sotoudeh
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Plate Theory ◽  
General Purpose ◽  
Flexible Body ◽  
Element Formulation ◽  
Element Solution ◽  
Beam Equations ◽  
Linear Version ◽  
Rotation Parameters

The fully intrinsic equations for plates (and analogous ones for shells), although equally as elegant as the corresponding beam equations, have neither been used for general-purpose finite element nor multi-flexible-body analysis. The fully intrinsic equations for plates have the same advantages of fully intrinsic equations for beams. These equations are geometrically exact, the highest order of nonlinearities is only of second order, and they do not include rotation parameters. We present a finite element formulation for these equations, and then investigate different possible boundary conditions and loading situations on simplified linear version.

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