APPLICATIONS OF THEORY IN THE DESIGN OF ASPHALT PAVEMENTS

Pavement design, like other aspects of engineering design, requires that engineers have the ability to analyze pavement structures in terms of significant system parameters. Moreover, it is necessary that such analyses incorporate essential features of observed pavement performance and appropriately measured values of the parameters to make the necessary quantitative evaluations required for design. It is generally recognized, however, that the parameters involved together with their interrelationships are complex. In recent years a number of attempts have been made to formulate, in a systematic manner, pavement design systems which bring these factors together as a part of the development of improved methods of pavement design, methods which will have the capabilities to: (1) accommodate the continually changing loading requirements; (2) better utilize available materials; (3) accommodate new materials which might be developed; (4) better define the role of construction; and (5) improve the reliability for performance prediction (or of the design estimate). While it is difficult to develop one pavement design system which, at this stage in time, will incorporate all desirable factors, it is possible to develop a series of subsystems the goal of each of which is to minimize a particular form of distress. To minimize the effects of various distress mechanisms, design frameworks (subsystems) have been established and specific formats are developed. These subsystems parallel the design approach widely used in Civil Engineering practice in which a structure is selected (designed), its behavior under anticipated service conditions analyzed, and its adequacy with respect to a specific distress criterion determined. A discussion of the most recent methods available to examine each of these subsystems is included. Considering this information, the authors recommend a specific technique to solve for each distress mode recognizing present limitations in materials characterization techniques and availability of solutions for boundary value problems representative of pavement structures as well as present limitations in knowledge of traffic, environmental, and construction effects. The concluding section is concerned with a discussion of factors not now included in the subsystems described in the report. Consideration is given to optimization, and the applicability of dynamic programming techniques to optmizing the solution of the pavement design problem is discussed. Included in the discussion is the ability of dynamic programming to consider the following factors: (a) Adaptive System - the incorporation of new information gained through observations of performance to predict future performance, (b) Sensitivity - the influence of individual parameters on the total system, and (c) Stochastic Processes - the ability to evaluate the degree of uncertainty in the information that forms the basis for design. /AUTHOR/

  • Supplemental Notes:
    • Presented at the Third International Conference on the Structural Design of Asphalt Pavements, Grosvenor House, Park Lane, London, England, Sept. 11-15, 1972.
  • Corporate Authors:

    International Conf Struct Design Asph Pvmts (3rd)

    University of Michigan, Department of Civil Engineering
    Ann Arbor, MI  United States  48104

    International Conf Struct Design Asph Pvmts (3rd)

    University of Michigan, Department of Divil Engineering
    Ann Arbor, MI  United States  48104

    Interrational Conf Struct Design Asph Pvmts (3rd)

    University of Michigan, Department of Civil Engineering
    Ann Arbor, MI  United States  48104
  • Authors:
    • Finn, F N
    • Nair, K
    • Monismith, C L
  • Conference:
  • Publication Date: 1972-9

Media Info

  • Features: Figures; References;
  • Pagination: p. 392-409
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00261948
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM