This paper describes the development and field verification of a generalized mechanistic design system presently under implementation in Ohio. This Ohio pavement structural design system has been developed through the merger of various mechanistic subsystems developed in recent years. Since the basis of any rational design approach is the stress distribution theory, an elastic stress distribution theory has been utilized in this system. The stress distribution theory, however, is presented in a generalized form incorporating geometrical and material non-linearities. The geometrical non-linearities include the effects of cracks, joints and discontinuities in the pavement system. As a result, this design system is capable of solving various boundary value problems associated with overlay design, joint stress analysis and fatigue crack propagation. The stress distribution in the vicinity of joints, crack and other discontinuities can easily be calculated and their effects on other functional relationships of other subsystems can be determined. The Ohio pavement structural design system is composed of two basic, independent subsystems, permanent deformation (rutting model) and fatigue models, as well as a subsystem describing the effect of environment (such as thermal fracture and thermally-induced failure) on the pavement structure. The environment subsystem considers the effects of environment on pavement material input variables and its expected performance due to thermally-induced stresses. Due to the mechanistic nature of the Ohio pavement structural design system, it is applicable to design and analysis of new pavements, as well as determination of asphalt overlay thickness requirements for rigid and CRC pavements. /Author/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 402-408

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Filing Info

  • Accession Number: 00170226
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Mar 14 1978 12:00AM