Wall-floor-wall interaction considering fill units: Fill units can contribute to the vertical load transfer - A proposal

The load transfer property of embankment fills, cushion, pile (or with cap) and foundation soils are complicated in a piled embankment. In this paper, the vertical load effects of pile and foundation soils at the bottom of embankment were analyzed with consideration of the interaction of each component. The arching effect of embankment fills and the pile-soil interaction were respectively formulated, and then, with continuous displacements and stresses at the bottom of embankment, a calculation method of pile-soil stress ratio was presented. In addition, the influence of the setting of cushion and geosynthetic was analyzed. The present method could definite the load sharing between pile and soil, and may be applied in the engineering design of embankment supported by spares piles.

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Real-Time Detection of Adhesion Coefficient between Tire and Road

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.249-250.109 ◽

2012 ◽

Vol 249-250 ◽

pp. 109-112

Author(s):

Kui Yang Wang ◽

Jin Hua Tang ◽

Guo Qing Li ◽

Chuan Yi Yuan

Keyword(s):

Load Transfer ◽

Detection Method ◽

Safety Performance ◽

Vehicle Safety ◽

Position Sensor ◽

Vertical Load ◽

Adhesion Coefficient ◽

Vehicle Load ◽

Motion State ◽

Brake Force

Adhesion coefficient between tire and road is one of important factors which influence vehicle safety performance. On the basis of theoretical analysis, the detection method of adhesion coefficient based on brake-by-wire is put forward. Brake force is estimated according to pedal position sensor, vehicle braking deceleration is detected through MMA6260Q acceleration sensor. Motion state of tire is distinguished according to brake force and road braking force, vertical load of tire is received in view of formula on vehicle load transfer. Adhesion coefficient used for sliding area is got and taken as adhesion coefficient of road. Analysis shows that the detection method may identify adhesion coefficient between tire and road accurately, and has certain practical value.

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Theoretical Research on Ideal Brake Force Distribution of Tractor-Semitrailer Cornering Braking

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.467.451 ◽

2013 ◽

Vol 467 ◽

pp. 451-455

Author(s):

Chen Li ◽

Xing Hu Li ◽

Wei Zhou ◽

Wei Liang Dai

Keyword(s):

Load Transfer ◽

Lateral Acceleration ◽

Theoretical Research ◽

Force Distribution ◽

Vertical Load ◽

Traditional Design ◽

Brake Force ◽

Braking Control ◽

Brake Force Distribution ◽

The Ideal

For tractor-semitrailer, load transfer during cornering braking caused big difference of the vertical load between coaxial wheels. As a result, braking efficiency and directional stability were affected seriously, the traditional design of braking force distribution between axles couldnt meet the requirements. In this paper, a dynamic model of tractor-semitrailer was established according to the motion and force during cornering braking. The rule of vertical load changing of each wheel with longitudinal acceleration and lateral acceleration was obtained. Combining with the tire and road adhesion conditions, the ideal brake force distribution was achieved. The research could provide theoretical reference to better control strategy of tractor-semitrailer braking control system.

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Analysis of Vertical Load Transfer Mechanism of Assembled Lattice Diaphragm Wall in Collapsible Loess Area

Advances in Civil Engineering ◽

10.1155/2021/5574934 ◽

2021 ◽

Vol 2021 ◽

pp. 1-13

Author(s):

Mingtan Xia ◽

Xudong Zhang ◽

Gengshe Yang ◽

Liu Hui ◽

Wanjun Ye

Keyword(s):

Failure Modes ◽

Load Transfer ◽

Diaphragm Wall ◽

Vertical Load ◽

Soil System ◽

Loess Area ◽

Collapsible Loess ◽

Negative Friction ◽

Vertical Bearing ◽

Soil Interface

Based on analysis of the formation mechanism and characteristics of the negative friction in collapsible loess areas, this study investigates the load transfer law of a wall-soil system under a vertical load, establishes the vertical bearing model of a lattice diaphragm wall, and analyzes the vertical bearing capacity of an assembled latticed diaphragm wall (ALDW) in a loess area. The factors influencing the vertical bearing characteristics of the ALDW in a loess area are analyzed. The vertical bearing mechanism of the lattice diaphragm wall in the loess area is investigated. The failure modes of the ALDW in the loess area are mainly shear failure of the soil around the wall and failure of the wall-soil interface. In the generation and development of negative friction, there is always a point where the relative displacement of the wall-soil interface is zero at a certain depth below the ground; at this point, the wall and soil are relative to each other. The collapsibility of loess, settlement of the wall and surrounding soil, and rate and method of immersion are the factors affecting the lattice diaphragm wall. The conclusions of this study provide a reference for the design and construction of ALDWs in loess areas.

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Vertical Load Transfer for Bored Piles Buried in Cohesive Intermediate Geomaterials

International Journal of Geomechanics ◽

10.1061/(asce)gm.1943-5622.0001810 ◽

2020 ◽

Vol 20 (10) ◽

pp. 04020172

Author(s):

Heng Zhao ◽

Jichao Hou ◽

Ling Zhang ◽

Chao Zhang

Keyword(s):

Load Transfer ◽

Vertical Load ◽

Bored Piles

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Vehicle Braking Stability Analysis in Turn Condition

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.607.604 ◽

2014 ◽

Vol 607 ◽

pp. 604-607 ◽

Cited By ~ 1

Author(s):

Ling Zhao

Keyword(s):

Stability Analysis ◽

Dynamic Model ◽

Load Transfer ◽

Rear Wheel ◽

Front Wheel ◽

Vertical Load ◽

Steering Angle ◽

Braking Distance ◽

Simulation Results

Considering the influence of wheel vertical load transfer and Steering angle, the paper establishes a dynamic model of 7 degrees freedom for vehicle under Braking in Turn Condition. Based on this model, wheel lock braking and ABS braking were researched and simulated. The simulation results show directly that first lock of front wheel loses vehicle steering performance, first lock the rear wheel sideslips, ABS braking can prevent loss of vehicle steering performance and sideslip, but slightly long braking distance.

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Analysis of Vertical Response of Drilled Pile at the Crest of Rock Slope Based on Shear Behavior

Geofluids ◽

10.1155/2021/9922653 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Chong Jiang ◽

Ju Fang ◽

Bowen Sun

Keyword(s):

Analytical Solution ◽

Rock Slope ◽

Load Transfer ◽

Rock Properties ◽

Vertical Load ◽

Modified Model ◽

Difference Analysis ◽

Side Resistance ◽

Rock Interface ◽

Shear Behaviors

This paper proposed a method for analysis of a drilled pile under vertical load at the crest of rock slope. Based on wedge theory, a modified model of normal stiffness of socket wall affected by the slope is obtained. Analyze the shear behaviors of the pile-rock interface, an analytical solution of load transfer of pile at the crest of rock slope is obtained. To evaluate the accuracy of the new method, this method is compared with the results of finite difference analysis. Finally, the method is used to analyze the effect of slope, pile, and rock properties on the unit side resistance and axial force.

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