Influence of Boundary Conditions on Composite Structure Wheel-Tracking Test Based on Viscoelastic Finite Element Analysis

The wheel-tracking test is usually used to evaluate the high temperature performance of a single-layer asphalt system. In order to conduct the wheel-tracking test on a composite structure specimen, the height of test specimens and test mold should be increased. But the influence of boundary conditions on the composite structure wheel-tracking test due to the height of test specimens and test mold changed is not clear. Therefore, the finite element analysis method was used to create a viscoelastic finite element model of a composite structure during the wheel-tracking test, and the influence of boundary conditions on the test results was analyzed under standard test conditions. The conclusions showed that the bottom boundary conditions of steel test mold would affect the strain-stress response of test specimens during the wheel-tracking test, but the influence of lateral restraint of steel mold on the test specimen was very slight and could be neglected. By examining the influence of boundary conditions on the test specimens of different thicknesses, it was found that a composite structure test specimen thickness greater than 10cm significantly reduced the impact of the bottom boundary conditions. Therefore, a thickness of 10cm was recommended as the minimum thickness for the composite structure to be used in the wheel-tracking test.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: References;
  • Pagination: pp 3389-3398
  • Monograph Title: ICCTP 2011: Towards Sustainable Transportation Systems

Subject/Index Terms

Filing Info

  • Accession Number: 01454889
  • Record Type: Publication
  • ISBN: 9780784411865
  • Files: TRIS, ASCE
  • Created Date: Sep 1 2011 3:30PM