scholarly journals Numerical Simulation of Load Transfer in Mooring Anchor Systems

2021 ◽  
Author(s):  
K. Quiroz ◽  
J. Tamayo ◽  
S. Maghous ◽  
A. Braun
Keyword(s):  
Numerical Simulation ◽  
Load Transfer ◽  
Anchor Systems

Cause Analysis and Influence Evaluation of Cracks in Thick Slab Construction

2021 ◽  
Author(s):  
Yi Guixiang ◽  
Li Liang
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Nuclear Power ◽  
Load Transfer ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Cause Analysis ◽  
Floor Slab ◽  
Maintenance Process ◽  
Crack Interface

Abstract Cracks were found in the slab of a nuclear power plant when the formwork was removed. By means of ultrasonic testing, water storage test and crack width detection, the fracture distribution, depth and width characteristics are determined. On this basis, the numerical simulation analysis of hydration heat in the maintenance process is carried out to simulate the possible crack generation and distribution of the floor slab in the maintenance process. The simulation result shows that cracks under the combined action of temperature and shrinkage are consistent with the cracking characteristics of floor slab. Through numerical simulation of the cracked floor and intact floor, the change of the out of plane bearing capacity (bending and shear) of the cracked floor is compared and analyzed. In the model, considering the reduction of the bearing capacity at the crack section and the change of load transfer effect at the crack interface, the concrete model is disconnected according to the known opening situation, and the contact relationship is set on the crack interface to simulate the crack. Through comparative analysis, the mechanical properties of the cracked floor are evaluated, and the refined numerical simulation method of the working components with cracks is proposed. This paper can provide guidance for the cause analysis and influence evaluation of similar thick plate cracking phenomenon.

Analysis of Numerical Simulation of Micropiles Reinforcing Shallow Landslide

2012 ◽  
Vol 446-449 ◽  
pp. 2663-2666 ◽  
Author(s):  
Hui He ◽  
Yan Bing Liu
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Load Transfer ◽  
Shallow Landslide ◽  
Shanxi Province ◽  
Deformation Characteristics ◽  
Lateral Loads ◽  
Analysis Software ◽  
Engineering Project ◽  
Working Performance

Based on the predecessors’ achievements and combined with the engineering project of Jinquan temple landslide located in Hanzhong city of Shanxi province, this paper takes international general geotechnical engineering professional analysis software—FLAC3D to do the numerical simulation. The deformation characteristics and mechanical properties of micropiles in lateral loads are researched. Working performance and load transfer rule of micropiles are analyzed. It is useful for the design of micropiles in 3 rows. It also has positive significance on the construction and design of micropiles reinforcing shallow landslide.

scholarly journals FLOATING RAFT-PILE FOUNDATIONS ANALYSIS USING NUMERICAL SIMULATION

2011 ◽  
Vol 7 (2) ◽  
pp. 40
Author(s):  
Helmy Darjanto
Keyword(s):  
Numerical Simulation ◽  
Pile Foundation ◽  
Load Transfer ◽  
Numerical Models ◽  
Pile Group ◽  
Vertical Displacement ◽  
Constitutive Law ◽  
Pile Foundations ◽  
Pile Groups ◽  
Foundation Soil

The numerical simulation of raft-pile foundations subjected to vertical load is presented in this paper. For comparison study, numerical models of single raft and pile groups are completed. The numerical models are adopting the elastic constitutive law for the materials. The stresses and vertical displacement of the models are observed. The behaviour of the raft-pile foundation compared to the pile-group is then investigated. The results using the same external load show that the raft-pile foundation has smallest displacement compared to the others. In terms of stresses, the raft shows contribution of the load transfer to the underneath soil as well as the piles. Moreover, the behaviour of the raft-pile system appears to be a combination of the pile-group and the single raft. In order to estimate the bearing capacity of the raft-pile system, it is suggested that the contribution of the raft should be included in addition of the piles’. Keywords: raft-pile foundation, soil-structure interaction, floating foundation

Numerical Investigation on Load Transfer Effects in Bogies of Urban Rail Vehicles

2006 ◽  
Author(s):  
Roberto Corradi ◽  
Alan Facchinetti ◽  
Giovanni Sempio
Keyword(s):  
Numerical Simulation ◽  
Numerical Investigation ◽  
Dynamic Behaviour ◽  
Load Transfer ◽  
Transfer Effects ◽  
Coupling Effects ◽  
Lateral Dynamics ◽  
Rail Vehicles ◽  
Urban Rail ◽  
Coupling Phenomena

Urban rail vehicles can present many types of architecture, definitely different from those of traditional rail vehicles. When dealing with long articulated tramcars, complex coupling effects between the vertical and lateral dynamics may arise. Making reference to a modern tramcar, the coupling phenomena are investigated in detail by means of numerical simulation, considering the dynamic behaviour during the negotiation of curves with or without superelevation.

Axial and Moment Carrying Capacity of Split Sleeve Grouted Connections for Repair of Tubular Members

2019 ◽  
Author(s):  
N. Vignesh Chellappan ◽  
S. Nallayarasu
Keyword(s):  
Numerical Simulation ◽  
Carrying Capacity ◽  
Parametric Study ◽  
Load Transfer ◽  
Element Model ◽  
Offshore Structures ◽  
Geometric Parameters ◽  
Axial Tension ◽  
Load Transfer Mechanism ◽  
Comprehensive Study

Abstract The tubular members damaged by ship impact or falling objects require repair and rehabilitation in offshore structures. The repair of damaged underwater tubular member using welding is hazardous and expensive and hence alternative connection methods such as grouted clamp techniques have been in use for many decades. The existing guideline on the design of grouted connections especially under axial tension and moment is very limited and requires further study. The load transfer mechanism of grouted clamps depends on various geometric parameters and bond between clamp and parent member. A comprehensive study on split sleeve grouted connection for load transfer between two parts of tubular members has been investigated and presented. Numerical simulation of split sleeve grouted connection has been carried out using finite element model of tubular member – sleeve through bond strength of grout. The numerical model has been validated using existing guidelines and further parametric study has been carried out. The parametric study includes geometric parameters such as diameter to wall thickness ratio of split sleeve, sleeve friction length, grout strength and grout shrinkage. The simulations have been carried out for combination of axial tension and moment loading.

Numerical Simulation of Load Transfer Mechanism of T-Shaped Soil-Cement Deep Mixing Column

2014 ◽  
Vol 580-583 ◽  
pp. 118-122 ◽  
Author(s):  
Pei Sheng Xi ◽  
Xiao Tao Zhang ◽  
Bo Liu
Keyword(s):  
Numerical Simulation ◽  
Load Transfer ◽  
Transfer Mechanism ◽  
Deep Mixing ◽  
Pile Diameter ◽  
Load Transfer Mechanism ◽  
Soil Cement ◽  
Head Height ◽  
General Section ◽  
Cement Deep Mixing

T-shaped soil-cement deep mixing column load transfer mechanism is different from the general section column. Basing on the fast Lagrangian finite difference method, we study the load transfer mechanism of T-shaped soil-cement deep mixing column at different load levels, expanding head height and the ratio of upper and lower pile diameter. By the numerical simulation we obtained that the axial force plummeted value of expanding head flange increases with the load and the ratio of upper and lower pile diameter increasing, it will decreases when the height of expanding head increasing.This paper can provide a reference for the design of T-shaped soil-cement deep mixing column.

Numerical Simulation on the Vertical Bearing Capacity of Large-Diameter Thin-Wall Tubular Pile with Rib

2013 ◽  
Vol 291-294 ◽  
pp. 1177-1181
Author(s):  
Hong Kai Liu ◽  
Tang Dai Xia ◽  
Nian Wu Liu
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Load Transfer ◽  
Large Diameter ◽  
Engineering Application ◽  
Side Surface ◽  
Thin Wall ◽  
Vertical Bearing ◽  
Bearing Characteristic ◽  
Vertical Bearing Capacity

The load transfer mechanism of a special-shaped tubular pile with rib is studied by numerical simulation. The results show that a higher side friction can be observed for the radial surface of the rib and the circumferential surface than the side surface of the rib at the same displacement. The influence of rib length and width on vertical bearing capacity are also discussed. It can be found that the length of the rib has a more significant effect on the vertical bearing capacity than the width. The bearing characteristic of the tubular pile with rib is also compared with the ordinary circular section tubular pile to provide a guideline to the engineering application.

scholarly journals Compressive Capacity of Vortex-Compression Nodular Piles

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Chunbao Li ◽  
Xiaosong Ma ◽  
Shifeng Xue ◽  
Haiyang Chen ◽  
Pengju Qin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Load Transfer ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Body Structure ◽  
Foundation Soil ◽  
The Stability ◽  
Nodular Pile ◽  
Vortex Compression

Compared with traditional equal-section pile, the nodular parts of nodular pile expand the contact area between the pile and foundation soil, which can greatly improve the bearing capacity of pile foundation and increase the stability of pile body structure. In this paper, the mechanism of pile-soil interaction in the construction of vortex-compression nodular pile is studied with the purpose of evaluating the compressive capacity of nodular piles. Through the indoor model test and ABAQUS numerical simulation analysis, the compressive characteristics of 12 types of vortex-compression nodular pile are obtained, and the variation rules of the parameters of the compressive characteristics of vortex-compression nodular piles are quantitatively analyzed, including the failure pattern of foundation soil, load-settlement relationship, and load transfer law of vortex-compression nodular piles. The results showed that the compressive capacity of vortex-compression nodular piles has significant advantages over that of traditional equal-section piles. Based on the results of the indoor model test and numerical simulation, the calculation method and formula of the compressive capacity of vortex-compression nodular piles are given by modifying the corresponding calculation formula of traditional nodular piles. The new method and formula are more in line with the actual working conditions and provide theoretical and data support for the further engineering application of vortex-compression nodular piles.

Preparation of Electron Transparent Metal-Matrix Composites

1968 ◽  
Vol 26 ◽  
pp. 334-335 ◽  
Author(s):  
M. R. Pinnel ◽  
A. Lawley
Keyword(s):  
Stainless Steel ◽  
Load Transfer ◽  
Volume Fraction ◽  
Steel Wire ◽  
Initial Step ◽  
Interfacial Region ◽  
Matrix Composites ◽  
Specific Test ◽  
The Matrix ◽  
The One

Numerous phenomenological descriptions of the mechanical behavior of composite materials have been developed. There is now an urgent need to study and interpret deformation behavior, load transfer, and strain distribution, in terms of micromechanisms at the atomic level. One approach is to characterize dislocation substructure resulting from specific test conditions by the various techniques of transmission electron microscopy. The present paper describes a technique for the preparation of electron transparent composites of aluminum-stainless steel, such that examination of the matrix-fiber (wire), or interfacial region is possible. Dislocation substructures are currently under examination following tensile, compressive, and creep loading. The technique complements and extends the one other study in this area by Hancock.The composite examined was hot-pressed (argon atmosphere) 99.99% aluminum reinforced with 15% volume fraction stainless steel wire (0.006″ dia.).Foils were prepared so that the stainless steel wires run longitudinally in the plane of the specimen i.e. the electron beam is perpendicular to the axes of the wires. The initial step involves cutting slices ∼0.040″ in thickness on a diamond slitting wheel.

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