Combined Effect of Tire Contact Pressure and Longitudinal Grade on the Interface Shear Stress of HMA Overlay over Ballast Concrete

In this study, a sophisticated three-dimensional (3-D) finite element model was developed to investigate the effects of temperature, overlay thickness, non-uniform contact stress, longitudinal grades, and loading time on responses of the interface shear stress. The results indicate that increasing the asphalt overlay thickness will significantly reduce the interface shear stress. Increasing temperatures will slightly increase the interface shear stress. Non-uniform contact pressure will cause more interface shear stress than uniform contact pressure. Increasing the longitudinal grade will increase the interface shear stress. Further, the interface shear stress will increase with the loading time when the asphalt mixture is treated as a viscoelastic material. The study provides insights on how to determine the interface bond strength for overlays when the design is subjected to complicated loading and geometry conditions.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFD80 Strength and Deformation Characteristics of Pavement Sections.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Wang, Guangming
  • Morian, Dennis
  • Frith, Douglas
  • Wang, Hao
• Conference:
  • Transportation Research Board 93rd Annual Meeting
  • Location: Washington DC
  • Date: 2014-1-12 to 2014-1-16
• Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 17p
• Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Finite element method; Hot mix asphalt; Overlays (Pavements); Rolling contact; Shear stress; Temperature; Thickness; Tire pressure
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01519263
• Record Type: Publication
• Report/Paper Numbers: 14-3389
• Files: TRIS, TRB, ATRI
• Created Date: Mar 24 2014 12:02PM