Dynamic Load of Vehicle on Asphalt Pavement

2014 ◽  
Vol 617 ◽  
pp. 29-33 ◽  
Author(s):  
Jozef Melcer
Keyword(s):  
Numerical Simulation ◽  
Dynamic Load ◽  
Asphalt Pavement ◽  
Moving Load ◽  
Dynamic Effect ◽  
Asphalt Pavements ◽  
Load Effect ◽  
The Road ◽  
Moving Vehicles ◽  
Tire Forces

Asphalt pavements are the transport structures subjected to dynamic effect of moving vehicles. Many effects influence the real values of vehicle tire forces. Road unevenness represents the most important factor influencing the magnitudes of tire forces. Such data can be obtained by numerical or experimental way. The paper deals with the numerical simulation of moving load effect on asphalt pavements and with numerical simulation of tire forces in relation to the road unevenness.

scholarly journals Sources of kinematic excitation of vehicle

2020 ◽  
Vol 310 ◽  
pp. 00005
Author(s):  
Eva Merčiaková
Keyword(s):  
Numerical Simulation ◽  
Moving Load ◽  
Load Effect ◽  
Kinematic Excitation ◽  
The Road

The road unevenness represents the main source of kinematic excitation of vehicle. During the process of solving the problem of vehicle road interaction the road unevenness represents the input value. The unevenness must be mapped, mathematically described and then used as an input value for numerical simulation of moving load effect on pavements. The submitted paper is dedicated to the description of such procedures.

Moving Load Effect of a Truck on Concrete Pavements

2014 ◽  
Vol 617 ◽  
pp. 24-28
Author(s):  
Gabriela Lajčáková
Keyword(s):  
Moving Load ◽  
Dynamic Effect ◽  
Concrete Pavements ◽  
Load Effect ◽  
The Real ◽  
Moving Vehicles ◽  
Computing Models

Pavements represent the transport structures subjected to dynamic effect of moving vehicles. The real transport load is needed for the assessment of pavements. Such data can be obtained by numerical or experimental way. Various computing models can be used for the analysis of concrete pavements. Some possibilities are presented in this contribution.

Research on the Moisture Damage Occurred on the Asphalt Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1117-1124 ◽  
Author(s):  
Chuan Qin Pang
Keyword(s):  
Asphalt Pavement ◽  
Moisture Damage ◽  
Air Pressure ◽  
Asphalt Pavements ◽  
The Road ◽  
The Poor ◽  
Moving Vehicles ◽  
Precipitation Water ◽  
Common Defect

Water is an important reason lead to the moisture damage on the asphalt pavements. In the paper, investigations and tests indicate that the poor permeability of the asphalt layer when the road opening to the traffic is a very common defect nowadays. The permeability would decrease under the hydraulic and air pressure resulted by moving vehicles, the water would directly penetrate the asphalt layer and accumulate at the interface betweens different layers. The precipitation water could also enter the pavement through the cracks and central separation belt, and accumulate as well, which lead to the development of moisture damage occurred at the bottom and upward subsequently. The intrude water also causes moisture failures in the base as well as the asphalt layer.

scholarly journals Research and Analysis on the Principle in Plant Cold Recycling for Foamed Bitumen and Mixture Performance

2021 ◽  
Vol 4 (6) ◽  
Author(s):  
Zecheng Ni ◽  
Shijing Chen ◽  
Yihuan Li ◽  
Hongxi Peng ◽  
Jiawen Liang ◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
External Factors ◽  
Asphalt Pavements ◽  
Huge Amount ◽  
Construction Waste ◽  
The Road ◽  
Road Performance ◽  
Foamed Bitumen ◽  
Cold Recycling

The early asphalt pavement in our country severely reduced the road performance due to various external factors during the use process. According to incomplete statistics, there are more asphalt pavements that need to be renovated and repaired every year in China, and the amount of construction waste such as asphalt concrete and other construction waste reaches 1,000. About ten thousand tons. If such a huge amount of construction waste is not used, it will inevitably cause great pollution to the environment. If it can be reused, not only will it be environmentally friendly and energy-saving, it will also save more than one billion yuan in costs. In view of the above problems, this article conducts related Research and Analysis on the Principle in Plant Cold Recycling for Foamed Bitumen and Mixture Performance to provide reference for future projects.

scholarly journals Concrete slab on elastic foundation under one axle load

2020 ◽  
Vol 313 ◽  
pp. 00010
Author(s):  
Daniela Kuchárová ◽  
Gabriela Lajčáková
Keyword(s):  
Elastic Foundation ◽  
Dynamic Load ◽  
Computational Models ◽  
Initial Conditions ◽  
Concrete Slab ◽  
Moving Load ◽  
Equations Of Motion ◽  
Dynamical Analysis ◽  
Program System ◽  
Load Effect

The paper is dedicated to the dynamical analysis of an isolated concrete slab on an elastic foundation to moving load effect of one axle load. The computational models of one axle load and a slab are mathematically described by the system of ordinary differential equations. The equations of motion are solved numerically in the environment of program system MATLAB. The plate response and dynamic load are monitored at a certain speed and certain initial conditions, depending on the properties of the elastic subgrade.

scholarly journals The Influence of Aeolian Sand on the Anti-Skid Characteristics of Asphalt Pavement

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5523
Author(s):  
Jingsheng Pan ◽  
Hua Zhao ◽  
Yong Wang ◽  
Gang Liu
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Test Results ◽  
Aeolian Sand ◽  
The Road ◽  
Gray Correlation ◽  
Positive Linear Correlation ◽  
Sand Accumulation

The influence of sand accumulation on the skid resistance of asphalt pavement was studied. Many scholars have researched the anti-skid performance of conventional asphalt pavements. However, there is a lack of research on the anti-skid performance of desert roads under the condition of sand accumulation. In this study, AC-13 and AC-16 asphalt mixtures were used. The British Pendulum Number (BPN) under different sand accumulations was measured with a pendulum friction coefficient meter, and the Ames engineering texture scanner was used to obtain different sand accumulations. The texture index of asphalt mixture was used to study the macro and micro texture of asphalt pavement under different amounts of sand accumulation, and the degree of influence of different particle sizes on BPN was obtained through gray correlation analysis. The test results show that the presence of aeolian sand has a significant impact on the macro and micro texture of the asphalt pavement and will cause the anti-skid performance to decrease. Moreover, there is an apparent positive linear correlation between the road surface texture index and BPN. The research results may provide reference and reference for the design and maintenance of desert highways.

Stresses Induced in Saturated Asphalt Pavement by Moving Vehicles

2012 ◽  
Vol 232 ◽  
pp. 874-877
Author(s):  
Bao Feng Pan ◽  
Yan Wang
Keyword(s):  
Constant Velocity ◽  
Asphalt Pavement ◽  
Fluid Pressure ◽  
Integral Transforms ◽  
Asphalt Pavements ◽  
Governing Equations ◽  
Poroelastic Medium ◽  
Pore Fluid Pressure ◽  
Moving Vehicles ◽  
Simulation Results

The purpose of this paper is to investigate the stresses and excess pore fluid pressure induced by the moving wheel pressure on saturated asphalt pavements. The saturated asphalt pavement is modelled as multilayered poroelastic half space exerted by a wheel pressure, which is moving at a constant velocity along the surface of the pavement. The governing equations for the proposed analysis are based on the Biot’s theory of dynamics in saturated poroelastic medium. The governing partial differential equations are solved by using Laplace and Hankel integral transforms. The numerical simulation results clearly demonstrate the induced deformation and water flow in the asphalt pavement.

scholarly journals Analysis on Mechanical Behavior of Typical Asphalt Pavement Structure based on the Tire Load Effect

2021 ◽  
pp. 338-344
Author(s):  
Fuming Liu, Liming Zhang, Hongyan Sun
Keyword(s):  
Mechanical Behavior ◽  
Asphalt Pavement ◽  
Science And Technology ◽  
National Development ◽  
Road Construction ◽  
Design Specification ◽  
Load Effect ◽  
The Road ◽  
Significant Difference ◽  
Pavement Structure

Further development of modern science and technology has made more science and technology technologies used in the modern social and life practice, and much more is this with the road construction. National development cannot be separate from the convenient traffic facilities, and in the current stage, the asphalt pavement design specification in China requires the road construction by simulating the force of the vehicle on the pavement structure with the round uniformly distributed load under the supposition of continuous interlayer pavement structure. However, as time goes on, the disadvantages of such design specification have gradually exposed, in which different materials, construction schedule and weather conditions will result in the significant difference in the asphalt pavement construction, thus resulting in weak interlayer viscous structure of the pavement, and finally causing the road subsidence and cracking. For this reason, this article has analyzed the mechanical behavior of typical asphalt pavement structure on the basis of explaining the influencing factors of the tire on typical asphalt pavement pressure under the tire load effect, with the expectation that there will be more professional construction of the asphalt pavement.

scholarly journals The Effectiveness of Liquid PUD-TiO2 Photocatalyst on Asphalt Pavement

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7805
Author(s):  
Dae-Seong Jang ◽  
Sang-Hoon Kim ◽  
Young Kim ◽  
Jae-Jun Lee ◽  
Deok-Soon An
Keyword(s):  
Power Plants ◽  
Asphalt Pavement ◽  
Field Tests ◽  
Weather Conditions ◽  
Air Pollutant ◽  
Asphalt Pavements ◽  
Tio2 Photocatalyst ◽  
The Road ◽  
Transportation Sector ◽  
Indirect Tensile

Harmful nitrogen oxides (NOX) are produced by vehicles, factories, mines, and power plants. In fact, over one million tons of NOX are emitted into the atmosphere every year, making it the most prevalent air pollutant. Approximately 45% of the emitted NOX in Korea is associated with the transportation sector. In this paper, the application of a new TiO2 photocatalyst on the asphalt roads to remove combustion-produced NOX was studied. In an effort to overcome the known constructability, adhesion, cost, and dispersion problems associated with TiO2 photocatalysts, the liquid polyurethane (PUD) was added with TiO2 to form a mixture later known as liquid PUD-TiO2. Laboratory and field tests were conducted to determine the optimum amount of photocatalyst to be used and the performance of asphalt pavement coated with PUD-TiO2 in terms of indirect tensile strength, water susceptibility, and rutting resistance. Additionally, the performance of PUD-TiO2 under different humidity, wind speed, and temperature conditions was also evaluated. The results showed that the application of PUD-TiO2 photocatalyst on the asphalt pavements road reduces the NOX available on the surface of the road. The PUD-TiO2 also was found to have no effects on the performance of asphalt pavement. Meanwhile, under different weather conditions, the reaction between the photocatalyst and NOX is mainly affected by the humidity.

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