Behavior Characteristics of Single Batter Pile under Vertical Load

The purpose of this study is to grasp the behavior characteristics of a single batter pile under vertical load by performing a model test. The changes in the resistance of the pile, the bending moment, etc. by the slope of the pile and the relative density of the ground were analyzed. According to the results of the test, when the relative density of the ground was medium and high, the bearing capacity kept increasing when the angle of the pile moved from a vertical position to 20°, and then decreased gradually after 20°. The bending moment of the pile increased as the relative density of the ground and the batter angle of the pile increased. The position of the maximum bending moment came closer to the ground surface as the batter angle of the pile further increased, and it occurred at a point of 5.2~6.7 times the diameter of the pile from the ground surface.

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Model Test Study on the Effect of Vertical Lode on Horizontal Bearing Capacity of Disk Pile

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.1804 ◽

2012 ◽

Vol 446-449 ◽

pp. 1804-1807

Author(s):

Fan Li Meng ◽

Guang Yu Sun ◽

Cheng Yuan Lu

Keyword(s):

Bearing Capacity ◽

Model Test ◽

Bending Moment ◽

Horizontal Displacement ◽

Combined Loading ◽

Horizontal Load ◽

Vertical Deformation ◽

Vertical Load ◽

Disk Diameter ◽

Test Study

In order to study how it influence the horizontal bearing capacity of the disk pile when there exists a vertical load, a group of model tests has been designed. Three double-disk piles were used in the test, and the distance of the two disks is 5 times as the disk diameter. First drew a vertical load V=200N/300N/400N on the top of pile1/2/3 respectively, then put on the horizontal load stage by stage. And by the test, we can study the differences of the pile bearing properties such as changes in the pile bending moment, the horizontal and vertical deformation on the top. Experiment showed that when the vertical load is quite small（V=200N、300N）, the existence of vertical load has little to do with horizontal bearing capacity. When a vertical load increases to a certain value（V=400N）, The maximum bending moment and horizontal displacement of the pile under the same horizontal load reduce, which indicates that the disks of the pile play a significant role in bearing combined loading.

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A Study for Influence Range of Ground Surface due to Sewer Fracture in Various Relative Density of Sand by Laboratory Model Test

Journal of the Korean Geotechnical Society ◽

10.7843/kgs.2016.32.2.19 ◽

2016 ◽

Vol 32 (2) ◽

pp. 19-30

Author(s):

Dong-Wook Oh ◽

Ho-Yeon Ahn ◽

Yong-Joo Lee

Keyword(s):

Relative Density ◽

Model Test ◽

Ground Surface ◽

Laboratory Model ◽

Relative Density Of Sand ◽

Laboratory Model Test

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Model Test Study on the Effect of Horizontal Load on the Vertical Bearing Capacity of Disk Pile

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.368-373.2571 ◽

2011 ◽

Vol 368-373 ◽

pp. 2571-2574

Author(s):

Cheng Yuan Lu ◽

Jin Jin Li ◽

Fan Li Meng

Keyword(s):

Bearing Capacity ◽

Bending Moment ◽

Horizontal Displacement ◽

Initial Time ◽

Horizontal Load ◽

Vertical Load ◽

Soil Pressure ◽

Test Study ◽

Vertical Bearing ◽

Vertical Bearing Capacity

A group of model tests were designed to study the effect of horizontal load on the vertical bearing capacity of disk pile. Three double-disk piles were used in the test, and the distance of the two disks is 5 times as the disk diameter. Drew a horizontal load H=100N/200N/300N on the top of pile1/2/3 respectively, and put on the vertical load stage by stage, then studied the differences of three piles’ bearing properties such as changes of the pile bending moment, the horizontal and vertical deformation on the top, and soil pressure around the pile. Experiment showed that when the horizontal load is quite small, the existence of horizontal load has little to do with vertical bearing capacity. When the load reached a certain level, the p-∆ effect under the vertical load will significantly affect the vertical bearing capacity of the pile. Especially during the initial time while there is a large horizontal displacement or rotation generated by the horizontal load, the pile’s bearing capacity is controlled by the horizontal displacement.

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A study on the vertical bearing capacity according to the inclination angle of single batter piles and the relative density of sand under vertical loads

Korean Society of Hazard Mitigation ◽

10.9798/kosham.2021.21.3.133 ◽

2021 ◽

Vol 21 (3) ◽

pp. 133-140

Author(s):

Seong-Kyu Yun ◽

Jiseong Kim ◽

Minsu Kang ◽

Gichun Kang

Keyword(s):

Bearing Capacity ◽

Relative Density ◽

Inclination Angle ◽

Sandy Soil ◽

Vertical Load ◽

Inclination Angles ◽

Vertical Bearing ◽

Relative Density Of Sand ◽

Batter Piles ◽

Vertical Bearing Capacity

This study analyzed the increase in the compressive bearing capacity of single-sloped piles according to the relative density and inclination angle when the batter piles are subjected to a vertical load in non-adhesive sand. An experiment was conducted with inclination angles of 0, 10, 20, 30, and 40, and the relative density of sandy soil was divided into 31% (loose), 53% (medium), and 72% (dense) and compared with the results of the earlier research. As a result of the experiment, when the relative density of the ground was medium and dense, the bearing capacity was greater than that of the vertical pile (0°) at all angles. The tendency noted was that the bearing capacity of the pile increased from vertical to 20° and gradually decreased after 20°. The same tendency was also exhibited by loose sandy soil, but with less bearing capacity than the vertical pile (0°) except for 20°.

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Experimental Analysis of Wall Consist of Straw Concrete Composite Board under the Action of Vertical Load

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.413 ◽

2013 ◽

Vol 671-674 ◽

pp. 413-416

Author(s):

Yu Jie Jin ◽

Kun Qian ◽

Miao Wang

Keyword(s):

Bearing Capacity ◽

Axial Compression ◽

Model Test ◽

Experimental Analysis ◽

Ultimate Load ◽

Vertical Load ◽

Concrete Wall ◽

Wall Model ◽

Composite Board ◽

Straw Composite

This article mainly analyzes characteristics on bearing capacity of wall consist of the straw composite board under vertical load, as well as bearing characteristics of various member under vertical load. Through the model test of 1:50 scale, it is obtained that cracking load, ultimate load and deformation of various elements of wall model in the process of test. The required data is provided that the bearing capacity formula under axial compression is to calculate straw concrete wall consist of composite board.

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Model Test and Finite Element Analysis of Squeezed and Branch Pile Bared Vertical and Horizontal Loads

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.470.1101 ◽

2013 ◽

Vol 470 ◽

pp. 1101-1104

Author(s):

Yue Hui Li ◽

Xiao Juan Gao ◽

Guo Hua Zhong

Keyword(s):

Bearing Capacity ◽

Model Test ◽

Horizontal Displacement ◽

Horizontal Load ◽

Vertical Load ◽

Load Bearing Capacity ◽

Element Analysis ◽

Load Bearing ◽

Practical Engineering ◽

Vertical Bearing

Model tests of the squeezed and branch pile with or without vertical load are carried out and the horizontal load bearing capacity are studied in this paper. Based on the model test results, the influence of vertical load to squeezed and branch pile horizontal load bearing capacity and the influence of horizontal load to squeezed and branch pile vertical bearing capacity are analyzed with FEM. The analysis results show that the vertical load may increase the lateral bearing capacity of pile, and the horizontal load may decrease the vertical settlement, but horizontal load may increase the horizontal displacement and moment of the pile body and lead to instability and cracking failure. This should be pay more attention in the practical engineering.

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Determination of flexure arrow a felled tree

Forestry Engineering Journal ◽

10.12737/19963 ◽

2017 ◽

Vol 6 (2) ◽

pp. 105-109

Author(s):

Ушницкий ◽

Aleksandr Ushnickiy ◽

Григорьев ◽

Mihail Grigor'ev

Keyword(s):

Friction Force ◽

Wood Density ◽

Modulus Of Elasticity ◽

Ground Surface ◽

Bending Moment ◽

Vertical Load ◽

Body Of Revolution ◽

Truncated Cone

It is known that the vertical load on the skidder including depends on the size characteristics hauling felled trees. In this case vertical load on the tractor is equal to the weight having caved in portion trees portion by the lower part of the tree cuta-way to the point of lifted from the ground surface and bending moment. For a determination of the weight the immersed por-tion is accounted distribution of mass along the length of felled trees wood density, modulus of elasticity and the friction force in felled trees the bundle. To simplify the calculation was performed at the following assumptions: a generator trunks accept how to defining body of revolution (truncated cone); wood density is uniform over the volume of that part of felled trees which is seen currently.

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Computational Study of the Propeller Position Effects in Wing-Mounted, Distributed Electric Propulsion with Boundary Layer Ingestion in a 25 kg Remotely Piloted Aircraft

Drones ◽

10.3390/drones5030056 ◽

2021 ◽

Vol 5 (3) ◽

pp. 56

Author(s):

José Serrano Cruz ◽

Andrés Tiseira ◽

Luis García-Cuevas ◽

Pau Varela

Keyword(s):

Boundary Layer ◽

Electric Propulsion ◽

Computational Study ◽

Bending Moment ◽

Vertical Position ◽

Position Effects ◽

Foreign Object Damage ◽

Trade Offs ◽

Remotely Piloted Aircraft ◽

Interesting Approach

Distributed electric propulsion and boundary layer ingestion are two attractive technologies to reduce the power consumption of fixed wing aircraft. Through careful distribution of the propulsive system elements, higher aerodynamic and propulsive efficiency can be achieved, as well as a lower risk of total loss of aircraft due to foreign object damage. When used on the wing, further reductions of the bending moment on the wing root can even lead to reductions of its structural weight, thus mitigating the expected increase of operating empty weight due to the extra components needed. While coupling these technologies in fixed-wing aircraft is being actively studied in the big aircraft segment, it is also an interesting approach for increasing the efficiency even for aircraft with maximum take-off masses as low as 25 kg, such as the A3 open subcategory for civil drones from EASA. This paper studies the effect of changing the propellers’ position in the aerodynamic performance parameters of a distributed electric propulsion with boundary layer ingestion system in a 25 kg fixed-wing aircraft, as well as in the performance of the propellers. The computational results show the trade-offs between the aerodynamic efficiency and the propeller efficiency when the vertical position is varied.

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