Numerical Simulation Analysis of Pullout Test of Planting Steel - A New Reinforcement Technique

2010 ◽  
Vol 163-167 ◽  
pp. 3739-3744
Author(s):  
Jian Chun Mu ◽  
Hui Feng Xi ◽  
Yong He Wu ◽  
Sheng Qiang Li ◽  
Guo Hui Yang
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Pullout Test ◽  
Ultimate Bearing Capacity ◽  
Stress Curve

The paper proposed a new reinforcement technique-planting steel technique. By numerical simulation analysis of planting steel, the load – slip curve, the load – stress curve and others were obtained. Meanwhile, ultimate bearing capacity of angle was calculated, and the ultimate bearing capacities with the same model at different anchorage depths were compared. With the anchorage depth increased, the ultimate bearing capacity increased too. But while the anchorage depth increased to a certain value, the ultimate bearing capacity no longer increased. All these provided a theoretical basis for the engineering application of planting steel technique.

Numerical Simulation Analysis of Bearing Performance of Extra-Long and Large-Diameter Single Pile

2014 ◽  
Vol 1065-1069 ◽  
pp. 943-948
Author(s):  
Zhi Meng Zhao ◽  
Jin Yi Chai ◽  
Cai Xia Fan
Keyword(s):  
Numerical Simulation ◽  
Elastic Modulus ◽  
Bearing Capacity ◽  
Simulation Analysis ◽  
Large Diameter ◽  
Ultimate Bearing Capacity ◽  
Single Pile ◽  
Pile Shaft ◽  
Settlement Ratio ◽  
Pile Length

The effects of pile diameter, the property of pile end bearing stratum, the material parameters of pile shaft and the changes of pile length on the bearing performance of extra-long and large-diameter single pile were examined with the finite element software ABAQUS to make the numerical simulation analysis, by establishing the overall axial symmetry model, which was based on the data of static load test of single pile at the Yellow River Bridge site. The results show that the ultimate bearing capacity of single pile, the stiffness and the end resistance ratio would increase gradually, whereas the compression settlement ratio decreases slowly; the pile end grouting can significantly increase the ultimate loads, and therefore, improve the bearing performance of piles, but it has little effect on the stiffness of pile when loading was smaller; the elastic modulus of pile shaft has no effect on the ultimate bearing capacity of friction piles, little on the end resistance ratio, while the pile compression settlement ratio would gradually decrease and the stiffness would increased with the increase of the elastic modulus of pile shaft, and this increase of stiffness would slow down with the increase of elastic modulus of pile shaft; it is unreasonable to improve the ultimate bearing capacity of extra-long single pile only by means of increasing the pile length.

Numerical Simulation Analysis of the Ultimate Bearing Capacity of the Circular Steel Tube K-Joints Reinforced with the Concrete

2011 ◽  
Vol 94-96 ◽  
pp. 2118-2122
Author(s):  
Hong Bin Zhou ◽  
Qiao Zhen Zhang ◽  
Yun Liu ◽  
Jun Ying Dong
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Simulation Analysis ◽  
Large Diameter ◽  
Engineering Application ◽  
Simulation Method ◽  
Steel Tube ◽  
Joint Zone ◽  
Deformation Curves ◽  
Circular Steel Tube

In order to solve the insufficient bearing capacity of the large-diameter circular steel tube K-Joints, the chord in the joint zone is filled with the concrete. The reinforcement of bearing capacity that the concrete makes to K-Joints is researched with the finite element numerical simulation method, in consideration of the material nonlinearity and the geometric nonlinearity. The numerical computation of bearing behavior is employed to eighteen groups of the large-diameter circular steel tube K-Joints and reinforced ones with the concrete (RK-Joints). The failure styles and the influencing factors of bearing capacity are analyzed with RK-Joints. The result shows that the bearing capacity of K-Joints is enhanced significantly by the concrete filled in the chord in the joint zone. The load-deformation curves reveal the changing regularity that the bearing capacity of joint follows the relevant parameters. It can provide reference for the engineering application of RK-Joints.

scholarly journals Numerical simulation of complex tubular joints of Beijing New Airport Terminal C type column

2019 ◽  
Vol 138 ◽  
pp. 01001
Author(s):  
A Zhang ◽  
G Shangguan ◽  
Yanxia Zhang ◽  
Dinan Shao
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Simulation Analysis ◽  
Economic Benefits ◽  
Tubular Joints ◽  
Airport Terminal ◽  
Stiffening Ribs ◽  
Final Optimization

The numerical simulation analysis of the two groups of fullscale complex tubular joints of the Beijing New Airport Terminal C type steel column under space static loading tests has been conducted by adopting software ABAQUS. The results obtained from the numerical simulation analysis consistent with those from the tests which enriched the research findings. Based on the research, mechanical performance of the joints has been carried out, the failure modes and ultimate bearing capacity of the joints with no stiffening ribs, three stiffening ribs and five stiffening ribs has been obtained. The numerical simulation results showed that, the bearing capacity of the joints without stiffening ribs were relatively low, the plastic failure of the main pipe was the major form of the destruction and the safety performance were too poor to meet the actual needs of the project. The bearing capacity of the joints significantly improved with the stiffening ribs set inside and the destruction changed to the connection of the main tubular and the branch, which means that the stress of the joints has been obviously improved by the setting of the stiffening ribs and was able to meet the needs of Beijing New Airport Terminal C type column. Through the comparative analysis of the stiffening ribs setting, it can be found that the bearing capacity of the joints were similar between the three and five stiffening ribs, considering the construction difficulty and economic benefits, three stiffening ribs has been selected as the final optimization result.

Time Effect of the Pile Bearing Capacity in Dredger Fill

2013 ◽  
Vol 639-640 ◽  
pp. 630-638
Author(s):  
Hua Yang Lei ◽  
Qian Qian Lv
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Ultimate Bearing Capacity ◽  
Time Effect ◽  
Second Phase ◽  
Excess Pore Water Pressure ◽  
Excess Pore

The dissipating of pore water pressure caused by pile sinking is one of the main factors resulting in time effect of ultimate bearing capacity of pile.The pore water pressure is monitored at each observing point during pile sinking and after that. With the pore pressure plan embedded in advance, by means of spot test in the process of pile sinking, under this geological conditions of the pile foundation by referring to the second phase project of the free port logistics processing zone in Dongjiang, Tianjin.The change law of the distribution and dissipation of excess pore water pressure with time, depth, radial distance and permeability coefficient of soil was also discussed. It’s found that the excess pore water pressure attenuates approximately linearly with the increase of the distance from the pile heart and the scope influenced is around 10d. As the numerical simulation accord with the test results effectively, promote the results then get the change rule of pile bearing capacity with time.The formula of pile bearing capacity about time effect in dredge fill was deduced for engineering reference.The effect of soil internal friction angle on the ultimate bearing capacity of pile was discussed. Numerical simulation shows that the ultimate bearing capacity of pipe pile increases over time and keeps stable after 20d.The ultimate limit bearing capacity is 1473kN with increase of 12.3%, the time when it reaches the stable state is in accord with the excess pore water pressure dissipation monitored at each observing point. The larger the internal frictional angle of soil becomes, the more the ultimate bearing capacity is. The angle exceeding 20°,the bearing capacity would not increase as internal frictional angle of soil increases.

The Numerical Simulation Analysis of the Straightening Process of the Large H-Shaped Steel

2012 ◽  
Vol 538-541 ◽  
pp. 905-908
Author(s):  
Lin Chen ◽  
Wei Tong ◽  
Hao Li ◽  
Yu Yan Liu
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Plastic Deformation ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Element Model ◽  
Solid Model ◽  
Stress And Strain ◽  
Stress Control ◽  
Set Up

A solid model and finite element model of nine-roller constant roller spacing of large H-shaped steel were set up, researching the problems of elastic-plastic deformation in straightening simulation for nine rollers continuous straightening process of large H-shaped steel. Through analyzing the stress and strain relation of large H-shaped steel, and analyzing the residual stress of H-shaped steel in the straightening process, a theoretical basis for the further step analysis the residual stress control after the H-shaped steel straightening was established.

The Study on the Basic Theory of Gold Seamless Pipe Welding Numerical Simulation

2013 ◽  
Vol 456 ◽  
pp. 467-470 ◽  
Author(s):  
Wen Chao Qin ◽  
Jian Ru Qi ◽  
Li Xin Wang ◽  
Wei Hong Ye
Keyword(s):  
Numerical Simulation ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Field Analysis ◽  
Analysis Method ◽  
Seamless Pipe ◽  
Pipe Welding ◽  
Reasonable Choice ◽  
Gold Industry

Based on the theory of FEM, we have established a viable three-dimensional dynamic simulation of welding field analysis method, heat distribution with a double ellipse as a welding heat source, to establish a reasonable boundary conditions, which is a reasonable choice of welding numerical simulation provides a theoretical basis, laying the groundwork for welding numerical simulation analysis of the gold industry.

scholarly journals Research on numerical simulation and intelligent computing of vehicle wading driving by smooth particle hydrodynamics method

2021 ◽  
Vol 2083 (4) ◽  
pp. 042091
Author(s):  
Wei Zhang ◽  
Peigang Jiao ◽  
Qinzhong Hou
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Test Site ◽  
Theoretical Research ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Intelligent Computing ◽  
Simulation Process ◽  
Particle Hydrodynamics

Abstract The method based on Smooth Particle Hydrodynamics (SPH) is a meshless method which is widely used at present. Its advantage is that it can effectively improve the mesh distortion when finite element is used to deal with large deformation, and its particle characteristics are suitable to deal with the simulation problem of fluid. Based on the actual vehicle wading test site and the actual parameters of the vehicle, combined with the actual situation and theoretical basis, the SPH method is used for numerical simulation analysis of the vehicle wading problem. By comparing the simulation process with the actual water changes during wading, the feasibility of using SPH method in vehicle wading application is proved. In the simulation process of vehicle wading driving, under the condition of constant water level, by setting different wading speeds of vehicle, the flow law and change mechanism of water free surface are analyzed, which are of great significance in theoretical research and engineering application research.

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.

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