Strain Distribution in the Asphalt Layer Under Measured 3-D Tire-Pavement Contact Stresses

In this paper, the authors study the effect of contact stress on pavement response by measuring the 3-dimensional non-uniform stresses that are applied on the pavement surface. The authors evaluate both the individual effect, as well as the combined effect, of longitudinal stress, transverse stress, and vertical stress on the horizontal strain at the bottom of the asphalt layer of flexible pavement. CIRCLY, a multi-layer linear-elastic computer program, is used to estimate horizontal strains in the longitudinal and transverse directions under different combinations of load, tire pressure, and asphalt thickness. It is shown that the uniform stress model underestimates the longitudinal strains under a combination of thin surface layer and low tire pressure. It is also shown that the model underestimates the transverse strains under a combination of thin surface layer, low tire pressure, and high wheel loading.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01054502
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS, ATRI
  • Created Date: Jul 13 2007 2:47PM