Nonlinear Finite Element Research for the Rutting of Asphalt Pavement Base on Shear Stress Analysis

2011 ◽  
Vol 97-98 ◽  
pp. 91-94
Author(s):  
Yi Dong ◽  
Miao Juan Peng ◽  
Yong Qi Ma ◽  
Wei Feng
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Stress Analysis ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Middle Layer ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Traffic Load ◽  
Pavement Base

In this paper, visco-elastic-plasticity theory is employed to establish a nonlinear finite element model of the asphalt mixture pavement. The influence of pavement structure, the ability of rutting resistance of middle layer and traffic load on shear stress distribution for asphalt pavement are discussed. The numerical results show that shear stress analysis can be used to analyze the rutting of asphalt pavement. The asphalt materials of middle layer have a great impact on rutting and shear stress. Modified asphalt is a useful middle layer material to decrease the rutting, and the hard asphalt is also an economical material to reduce rutting. Overload and overpressure easily cause pavement rutting damage. Pavement longitudinal grade is not the main reason leading to rutting at the long slope, but brake frequently in the long slope is the real cause of rutting.

Research on Anti-Rutting Performance of Reconstruct Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1601-1604
Author(s):  
Lian Yu Wei ◽  
Fei Gao ◽  
Shi Bin Ma ◽  
Qing Zhou Wang
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Finite Element Model ◽  
Asphalt Pavement ◽  
Maximum Shear Stress ◽  
Element Model ◽  
The State ◽  
Longitudinal Slope ◽  
The Finite Element Model

Based on the overhaul structure of actual asphalt pavement, establishes the finite element model and analyses the shear stress in the state of overload, longitudinal slope and contact coefficient. The result is that the load and the gradient of longitudinal slope larger, the influence of rutting more seriously. The growth of shear stress is larger which brought by adding load on steep longitudinal slope than that of adding on longitudinal slope. The contact coefficient of interlayer α larger the maximum shear stress larger, on the contrary, the contact coefficient of interlayer α smaller the maximum shear stress smaller.

Dynamic Response Analysis for Two Typical Structures of Saturated Asphalt Pavements with 3D Finite Element Method

2011 ◽  
Vol 255-260 ◽  
pp. 3391-3396
Author(s):  
Rui Bo Ren ◽  
Li Tao Geng ◽  
Wen Yang Qi
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Asphalt Pavement ◽  
Fluid Pressure ◽  
Asphalt Mixture ◽  
Temporal Distribution ◽  
Element Model ◽  
Response Analysis ◽  
Flexible Base ◽  
Base Course

The combined effect of moisture and dynamic loading on asphalt mixtures has been recognized as one of the main causes of premature deterioration of flexible pavements. Based on porous medium theory, the asphalt mixture is regard as saturated porous material, and a three-dimensional finite element model is established to investigate dynamic response of two typical asphalt pavement structures, which are the semi-rigid asphalt pavement and the semi-rigid asphalt pavement with flexible base course. Then the spatial and temporal distribution of stress, strain and pore fluid pressure of the two structures are calculated, respectively. Analysis results show the superiority of semi-rigid asphalt pavement structure with flexible base course to the semi-rigid asphalt pavement in aspect of moisture resistance capability.

Traffic Load of Pavement under the Action of the Finite Element Analysis Viscoelastic Fracture

2012 ◽  
Vol 446-449 ◽  
pp. 3311-3317
Author(s):  
Han Qing Liu ◽  
Gui Xian Wu
Keyword(s):  
Stress Intensity Factor ◽  
Finite Element ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Traffic Load ◽  
Finite Element Software ◽  
Partial Load ◽  
Viscoelastic Fracture

In the design of the asphalt pavement or asphalt overlay, consider about the viscoelastic fracture mechanics behavior of asphalt mixture is significant in researching the asphalt pavement craze or the extending behavior of reflective crack. This paper employs nonlinear finite element software ABAQUS to analysis about the viscoelastic of asphalt mixture in the basis of the vicoelastic breaking theory, analyze the Traffic dynamic loading different speeds, different grassroots modulus to contain crack pavement structure system of the displacement field and stress field of influence.The calculation results show that the curve of the stress intensity factor in the crack tip moves as the increase of the speed, but the maximum is virtually unchanged; and it is proportional to the grassroots modulus variations, that is the stress intensity factor increases as the increase of grassroots modulus. With the effect of partial load, the stress intensity factor is formed by KⅠ、KⅡ. It is mainly assumed by KⅡ when grassroots modulus is low, and as the grassroots modulus increases, the KⅠ is increases, But KⅡ changes little.

scholarly journals Mechanical Characteristics of Asphalt Pavement Pothole Maintenance

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Fengjun Zhao ◽  
Yuhang Tang ◽  
Jianjun Wu ◽  
Zhi Huang ◽  
Mingyue Gao ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Void Ratio ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Element Model ◽  
Filling Material ◽  
Ansys Software ◽  
Structure Form ◽  
The Finite Element Model

Traditionally, potholes are mainly paved for maintenance, and the asphalt mixture needs to be compacted. But due to the construction quality problem, the compacting degree of asphalt mixture may not be enough and the void ratio of asphalt mixture may not meet the requirements, resulting in the premature damage of the potholes after repair. If the repair material can be prefabricated, this problem will be well solved. So, based on the structure form of the prefabricated rapid maintenance of asphalt pavement, this paper aims to determine the most unfavorable loading position in pothole repair, which was established by the ANSYS software with the finite element model. The results show that the most unfavorable loading position of tensile stress for patch materials and joint filling material is C1-1 (A2-2) and the most unfavorable loading position of shear stress for joint filling material and leveling layer is B2-1 and C1-5. Subsequently, the influences of the material modulus, size, thickness, and modulus of the old pavement material on the potholes are calculated by using the finite element model under the most unfavorable loading position.

Numerical Analysis of Porous Concrete Base in Asphalt Pavement Based on Traffic Load

2013 ◽  
Vol 405-408 ◽  
pp. 1757-1760
Author(s):  
Li Jun Suo
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Asphalt Pavement ◽  
Element Model ◽  
Mechanical Analysis ◽  
The Other ◽  
Traffic Load ◽  
Porous Concrete ◽  
Concrete Base ◽  
Increase With Increase

Traffic load is important parameter used in the analysis of the new pavement design. However, few studies have done extensive and intensive research on the load stress for asphalt pavement of porous concrete base. Because of that, it is necessary to study the stress of porous concrete base in the asphalt pavement based on traffic load. In the paper, first of all, threedimension finite element model of the asphalt pavement is created for the aim of doing mechanical analysis for the asphalt pavement. And then, the two main objectives of this study are investigated. One is calculation for load stress of porous concrete base, and the other is analysis for load stress of porous concrete base. The results show that load stress of porous concrete base decreases, decrease and increase with increase of bases thickness, surfaces thickness and ratio of bases modulus to foundations modulus respectively.

Finite Element Analysis of Tire/Rim Interface Forces Under Braking and Cornering Loads

1992 ◽  
Vol 20 (2) ◽  
pp. 83-105 ◽  
Author(s):  
J. P. Jeusette ◽  
M. Theves
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Contact Pressure ◽  
Element Model ◽  
Shear Stresses ◽  
Detailed Knowledge ◽  
Stress Distributions ◽  
Element Analysis ◽  
Plane Shear ◽  
Normal Contact

Abstract During vehicle braking and cornering, the tire's footprint region may see high normal contact pressures and in-plane shear stresses. The corresponding resultant forces and moments are transferred to the wheel. The optimal design of the tire bead area and the wheel requires a detailed knowledge of the contact pressure and shear stress distributions at the tire/rim interface. In this study, the forces and moments obtained from the simulation of a vehicle in stationary braking/cornering conditions are applied to a quasi-static braking/cornering tire finite element model. Detailed contact pressure and shear stress distributions at the tire/rim interface are computed for heavy braking and cornering maneuvers.

Dynamic Behavior of Cellular Materials under Combined Shear-Compression

2016 ◽  
Vol 835 ◽  
pp. 649-653
Author(s):  
Yuan Yuan Ding ◽  
Shi Long Wang ◽  
Zhi Jun Zheng ◽  
Li Ming Yang ◽  
Ji Lin Yu
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Finite Element Model ◽  
Nonlinear Regression ◽  
Element Model ◽  
Cellular Materials ◽  
Regression Method ◽  
Plateau Stress ◽  
Nonlinear Regression Method ◽  
Biaxial Behavior

A 3D cell-based finite element model is employed to investigate the dynamic biaxial behavior of cellular materials under combined shear-compression. The biaxial behavior is characterized by the normal stress and shear stress, which could be determined directly from the finite element results. A crush plateau stress is introduced to illustrate the critical crush stress, and the result shows that the normal plateau stress declines with the increase of the shear plateau stress, which climbs with the increase of loading angle. An elliptical criterion of normal plateau stress vs. shear plateau stress is obtained by the nonlinear regression method.

Study on Load Stress of Lean Concrete Base in Asphalt Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1495-1498
Author(s):  
Li Jun Suo
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Asphalt Pavement ◽  
Element Model ◽  
Pavement Design ◽  
The Other ◽  
Three Dimension ◽  
Traffic Loading ◽  
Concrete Base

Load stress, which is caused by traffic loading, is important parameter used in the analysis of the new pavement design. In order to study the load stress of lean concrete base in the asphalt pavement, first of all, three–dimension finite element model of the asphalt pavement is established. The main objectives of the paper are investigated. One is calculation for load stress of lean concrete base, and the other is analysis for relationship between load stress of lean concrete base and parameters, such as thickness, modulus. The results show that load stress of lean concrete base decreases, decreases and increases with increase of base’s thickness, surface’s thickness and ratio of base’s modulus to foundation’s modulus respectively. So far as the traffic axle loading is concerned, it has a significant impact on load stress of lean concrete base, and it can be seen from results that when load is taken from 100kN to 220kN, load stress increases quickly with the increase of the traffic axle loading.

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