Investigating the Performance of Composite Pavement under Lateral and Horizontal Load Using Finite Element Modeling

Document Type : Original Article

Authors

1 Associate Professor, Civil Engineering Department, University of Zanjan, Zanjan, Iran

2 M.Sc. Grad., Civil Engineering Department, University of Zanjan, Zanjan, Iran

Abstract

In this research, the effects of vertical, horizontal and lateral loads of traffic on the shear stress at the interact of surface and base layer, longitudinal and lateral displacement and the maximum tensile strain at the top of surface layer have been investigated. Three different loading conditions, including only vertical, vertical and horizontal, and vertical, horizontal and lateral, simultaneously, have been investigated. The horizontal and lateral loads were considered to be 50% and 20% of the vertical load, respectively. The loads were applied on two different tire configurations, including dual tires and wide-base tire, with a constant axle load of 82kN and tire pressure of 600kPa, at two temperatures of 20 and 40°C. The analysis was conducted using 3D finite element modeling in ABAQUS. The results show that the horizontal loading has a significant effect on the tensile strain at the surface, shear stress at the interface and the horizontal and lateral displacements, such that, for example, at 20°C, the maximum horizontal strain on the surface, shear stress at the interface, horizontal and lateral displacements under dual tires with vertical and horizontal load, are 76, 286, 329 and 15.5% higher than those under only vertical load. Results also show that the wide-base tire has more detrimental effect than the dual-tire, such that, the maximum horizontal strain at the surface, shear stress at the interface, horizontal and lateral displacements under the wide-base tire with vertical, horizontal and lateral load at 40°C are, respectively, 1.53, 2.43, 1.7 and 1.8 times higher than those under dual tire. The results also reveal that applying lateral load does not significantly affect the responses, except the lateral displacement. Also, while the shear stress at the interface is not significantly affected by temperature, the horizontal strain at the surface and the displacements increases significantly with increasing temperature.
 
 
 
 

Keywords

References

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Journal of Transportation Research
Volume 15, Issue 2
July 2018
Pages 173-195

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