Calculation Model of Bearing Capacity of the Rigid-Body Expanded Plate Pile under Horizontal Force in Ocean Engineering

2020 ◽  
Vol 111 (sp1) ◽  
Author(s):  
Yongmei Qian ◽  
Songdi Ai ◽  
Ruozhu Wang ◽  
Yujie Jin
Keyword(s):  
Rigid Body ◽  
Bearing Capacity ◽  
Calculation Model ◽  
Horizontal Force ◽  
Ocean Engineering

The Numerical Simulation of Bearing Capacity of Pile-Bucket Foundation under Combined Loading of Up-Pull and Horizontal Force

2011 ◽  
Vol 243-249 ◽  
pp. 2171-2175
Author(s):  
Wen Bai Liu ◽  
Long Zhao ◽  
Ning Jia
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Horizontal Displacement ◽  
Calculation Model ◽  
Combined Loading ◽  
Horizontal Load ◽  
Horizontal Force ◽  
Bucket Foundation ◽  
Load Increase ◽  
Pulling Force

By using ABAQUS software to conduct numerical simulation and model test of pile-bucket under mono-loading of up-pulling force and horizontal force, then make comparison of both results to testify the accuracy of finite calculation model. Then by numerical simulation to study bearing capacity of pile-bucket foundation under combined loading of up-pull and horizontal force. The result shows the pile-bucket foundation horizontal displacement will increase with the increase of up-pulling force at the limit horizontal load, and the horizontal displacement becomes more obvious as the up-pulling load increasing if providing greater horizontal loading force. Before the up-pulling force reaches the limit, horizontal load will not affect up-pulling displacement; after the up-pulling force reaches the limit, the horizontal load can slightly reduce the up-pulling displacement of pile top. The effect of up-pulling load increase on horizontal displacement is obvious for pile depth in soil at 0~15m, but very tiny for pile body with buried depth over 15m.

The Review of Studies on Formulas for Calculating Wave Breaking Height

2013 ◽  
Vol 392 ◽  
pp. 958-961
Author(s):  
Jia Xuan Yang ◽  
Shou Xian Zhu ◽  
Xun Qiang Li ◽  
Wen Jing Zhang ◽  
Lei Wang
Keyword(s):  
Wave Height ◽  
Wave Breaking ◽  
Calculation Model ◽  
The Other ◽  
Breaking Wave ◽  
Present Calculation ◽  
Calculation Methods ◽  
Ocean Engineering ◽  
Wave Calculation ◽  
Computing Models

Wave breaking is the most complex and intensified physical process in coastal zone. And as the maximum in this area, the breaking wave height has a major impact on ocean engineering and ship sailing. In this paper, the present calculation methods for breaking height are concluded and divided into two categories: one is directly computing models using deep wave elements; the other is indirectly calculation models based on the surf wave calculation model and the criterion of breaking.

Analysis of Failure Mode and Ultimate Bearing Capacity of Steel Truss Coupling Beam

2012 ◽  
Vol 594-597 ◽  
pp. 824-827 ◽  
Author(s):  
Hu Qiang ◽  
Zhi Heng Deng ◽  
Lin Qian ◽  
Dong Xiao Xu
Keyword(s):  
Bearing Capacity ◽  
Failure Mode ◽  
Order Effect ◽  
Calculation Model ◽  
Ultimate Bearing Capacity ◽  
Coupling Beam ◽  
Ultimate Capacity ◽  
Height Ratio ◽  
Steel Truss ◽  
Reversed Loading

A calculation model about failure mode and ultimate bearing capacity of steel truss coupling beam is proposed based on compatible distortion and balance conditions, second-order effect, elastic-perfectly plasticity and strain state about eight specimens when these specimens fail under low cyclic reversed loading. And then this model is applied to analyzing influences of height, span and chord stiffness on bearing capacity of truss. Some valuable results are obtained such as advantageous range of span-to-height ratio and influence laws of chord stiffness on ultimate capacity.

Pit Bearing Capacity Effect to Status of Soil Plug during Pile Driving in Ocean Engineering

2011 ◽  
Vol 250-253 ◽  
pp. 2530-2533
Author(s):  
Ping Zhu ◽  
Shu Wang Yan
Keyword(s):  
Bearing Capacity ◽  
Soil Column ◽  
Dynamic Effect ◽  
Design Stage ◽  
Engineering Practice ◽  
Bohai Bay ◽  
Ocean Engineering ◽  
Deep Foundation ◽  
Wrong Decision ◽  
Soil Plug

Foundation piles of the offshore oil platforms in Bohai Bay are usually longer than 100m with a diameter larger than 2m. Thus, thoughtful drivability analysis has to be performed in the design stage because of the high cost and time limitation. It has been shown that to judge if the soil column inside the pile is fully plugged, which will make the pile behave as close-ended, will strongly influence the accuracy of drivability analysis. Engineering practice repeatedly indicates that the currently widely used methods for soil plug judgment often give incorrect results, leading the designers to make a wrong decision. It has been found that this problem is caused by the ignorance of the bearing capacity provided by the soil surrounding the pile. Based on the Terzaghi’s bearing capacity calculation method for deep foundation, a new approach for judging soil plug status is put forward, in which the surcharge effect has been considered and the dynamic effect coefficient is included. This approach has been applied to some practical engineering projects successfully, which may give more reasonable results than the currently used method.

scholarly journals Calculation model and bearing capacity optimization method for the soil settlement between piles in geosynthetic-reinforced pile-supported embankments based on the membrane effect

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256190
Author(s):  
Zhen Liu ◽  
Aobo Zhang ◽  
Jiangping Xu ◽  
Cuiying Zhou ◽  
Lihai Zhang
Keyword(s):  
Bearing Capacity ◽  
Soft Soil ◽  
Field Tests ◽  
Road Construction ◽  
Optimization Method ◽  
Calculation Model ◽  
Utilization Efficiency ◽  
Project Cost ◽  
Pile Spacing ◽  
Membrane Effect

The geosynthetic-reinforced pile-supported embankment (GRPSE) system has been widely used in road construction on soft soil. However, the application of the GRPSE system is often restricted by its high-cost. The reason is that they are designed for bearing control as defined in the past. During the construction process, the pile spacing is reduced to meet the requirements for the embankment bearing capacity and settlement. These factors cause the membrane effect to not be exploited. As a result, the utilization efficiency of the bearing capacity of the soil between the piles is low and the project cost is high. Therefore, in order to solve the problem of insufficient bearing capacity of soil between piles, we established a settlement calculation model of soil between piles based on membrane effect. The model considers the relationship between the geosynthetic reinforcement (GR) and the pile spacing. Based on the obtained model, a method for optimizing the soil bearing capacity of GRPSEs is proposed. By controlling the settlement of soil between piles, the bearing capacity of soil between piles and the membrane effect of embankment can be fully utilized. Therefore, the project cost can be reduced. Finally, the method is applied to field tests for comparison. The results show that the method is reasonable and applicable. This method can effectively exploit the membrane effect and improve the utilization efficiency of the bearing capacity of the soil between piles. An economical and reasonable arrangement scheme for the piles and GR was obtained. This scheme can not only ensure the safety of the project, but also fully utilize the bearing capacity of the soil between the piles and provide a new method for engineering design.

scholarly journals Numerical Simulation Study Of Squeezed Branch Piles Based On Post-grouting Technology

2021 ◽  
Vol 292 ◽  
pp. 01038
Author(s):  
LiXing Ma ◽  
ZhuoPeng Shi ◽  
Kai Han ◽  
PengFei Chang ◽  
XiaoDong He
Keyword(s):  
Bearing Capacity ◽  
Load Transfer ◽  
High Load ◽  
Single Pile ◽  
Horizontal Force ◽  
Load Bearing Capacity ◽  
Load Transfer Mechanism ◽  
Post Grouting ◽  
Vertical Bearing ◽  
Excellent Stability

The squeezed branch pile has strong resistance to pressure, pullout and horizontal force, and it also has excellent stability, which makes it widely used in the field of electrical engineering. Based on the ABAQUS, the paper simulates the vertical bearing situation of post-grouting squeezed branch piles, by setting up Set two comparisons of single pile and squeezed branch pile, the bearing capacity, load transfer mechanism and failure mode of post-grouting squeezed branch piles were comprehensively analyzed and compared. Studies have shown that the bearing capacity of the squeezed branch piles with post-grouting technology has increased by 68.1% compared with the traditional squeezed branch piles, and the bearing characteristics of the branches have changed greatly. In this process, the end-bearing function of the branch plate is fully exerted, and the high load-bearing capacity of the grouted strata soil is used to reduce the settlement.

scholarly journals New Aspects Concerning Dynamics of Rigid Solid Body in Plane-Parallel Motion Subjected to Real Constraints. Part One

2019 ◽  
Vol 24 (2) ◽  
pp. 175-180
Author(s):  
Vladimir Dragoş Tătaru ◽  
Mircea Bogdan Tătaru
Keyword(s):  
Differential Equations ◽  
Rigid Body ◽  
Dynamic Analysis ◽  
Degrees Of Freedom ◽  
Equations Of Motion ◽  
Original Method ◽  
Horizontal Force ◽  
Constraint Forces ◽  
Inclined Plane ◽  
Parallel Motion

Abstract The present paper approaches in an original manner the dynamic analysis of a wheel which climbs on an inclined plane under the action of a horizontal force. The wheel rolls and slides in the same time. The two movements, rolling and sliding are considered to be independent of each other. Therefore we are dealing with a solid rigid body with two degrees of freedom. The difficulty of approaching the problem lies in the fact that in the differential equations describing the motion of the solid rigid body are also present the constraint forces and these are unknown. For this reason they must be eliminated from the differential equations of motion. The paper presents as well an original method of the constraint forces elimination.

Analysis of the Structure Style Selection for Ocean Engineering Floating Structure

2010 ◽  
Vol 163-167 ◽  
pp. 501-506
Author(s):  
Wen Bai Liu ◽  
Shi Lei Xi ◽  
He Sen Cheng ◽  
Yu Xi Gu
Keyword(s):  
Bearing Capacity ◽  
Wave Attenuation ◽  
Wave Forces ◽  
Grid Structure ◽  
Ocean Engineering ◽  
Floating Structure ◽  
Element Analysis ◽  
Static Loads ◽  
Concave Shape ◽  
Maximum Stresses

Use finite element analysis software ABAQUS to analyze the bearing capacity, strength and wave attenuation performance of very large ocean engineering floating structure based on spatial grid structure, and analyze selected ocean engineering floating structures with different geometrical dimensions. The ocean engineering floating grid structure attenuates wave effectively, whose bearing capacity and strength are high. In the static loads and wave forces analysis, with the dip angle α of belly poles increasing, the maximum stresses decrease, and the bearing capacity lowers; with the height h of the pyramid larger, the maximum stresses and the bearing capacity increase; with the od D of the poles and sphere joints subjoining, the maximum stresses change in concave shape in the whole, and the bearing capacity increases in turn; with the wall thickness t1 of the poles increasing, the maximum stresses under static loads become smaller, but under wave forces the maximum stresses change in concave shape, the bearing capacity declines. The bearing capacity, strength and wave attenuation performance of the structure are influenced by it’s geometrical dimension regularly, and so will affect the project implementation in a practical way.

Calculation Method on Bearing Capacity of Anchor Bolt of Transmission Line Tower Foundation Considering Influence of Horizontal Force

2012 ◽  
Vol 170-173 ◽  
pp. 327-330
Author(s):  
Qiang Cui ◽  
Xian Long Lu
Keyword(s):  
Transmission Line ◽  
Bearing Capacity ◽  
Engineering Application ◽  
Theoretical Method ◽  
Horizontal Force ◽  
Transmission Tower ◽  
Strength Theory ◽  
Anchor Bolt ◽  
Uplift Force ◽  
The Third

Anchor bolt which is one of the most important component connecting foundation and transmission tower bears the force transmitted from superstructure. At present, in the conventional design method, uplift force is only included, however, the influence of horizontal force on bearing capacity of anchor bolt is neglected. Thus, a theoretical method on obtaining bearing capacity of anchor bolt is proposed for the first time based on the third strength theory in this paper, in which the influence of horizontal force is considered. According to the third strength theory, the calculation results of bearing capacity of anchor bolt under different force are obtained. It can be seen that the cross-section area of single anchor bolt shows linear increase with the increment of vertical uplift force, at the same time, the influence of horizontal force to bearing capacity of anchor bolt is more significant with the addition of the ratio of horizontal force to uplift force, which should be attached enough attention in engineering application. And the conclusion achieved in this work can provide valuable guidance for anchor bolt design of the transmission line project.

Study on shear behavior of reinforced coral aggregate concrete beam

2020 ◽  
Vol 23 (11) ◽  
pp. 2388-2398
Author(s):  
Bo Da ◽  
Hongfa Yu ◽  
Haiyan Ma ◽  
Bo Yu ◽  
Zhangyu Wu ◽  
...  
Keyword(s):  
Failure Mode ◽  
Concrete Beam ◽  
Concrete Strength ◽  
High Strength ◽  
Shear Behavior ◽  
Calculation Model ◽  
Shear Capacity ◽  
Coated Steel ◽  
Ocean Engineering ◽  
Aggregate Concrete

Reinforced coral aggregate concrete beam and reinforced ordinary aggregate concrete beam with different concrete type, concrete strength, and steel type were designed in this study to investigate their shear behavior. The shear behavior of reinforced coral aggregate concrete beam was tested, the failure mode and deflection behavior were studied, and the calculating model for the ultimate shear capacity ( Vcs) of reinforced coral aggregate concrete beam was proposed. Results showed that the failure mode of reinforced ordinary aggregate concrete beam and reinforced coral aggregate concrete beam were basically the same. As the concrete strength increases, the normal section cracking load ( Vcr), inclined section Vcr, and Vcs of reinforced coral aggregate concrete beam increased gradually. Furthermore, Vcr and Vcs of reinforced coral aggregate concrete beam were as follows: 316 stainless steel > common steel > zinc-chromium coated steel > new organic coated steel. For the coral aggregate concrete structure in ocean engineering, in order to prolong its service life, the use of new organic coated steel was suggested. At the same time, the influence of high-strength coral aggregate concrete and stirrup corrosion was comprehensively considered and the calculation model for the Vcs of reinforced coral aggregate concrete beam was presented and was then verified.

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