A description of new methods for the structural design of flexible pavement should dwell mainly on new procedures for determining fatigue resistance and resistance against the accumulation of permanent deformations. It may be of equal importance, however, to set out a complete caluclation procedure, based on already known theoretical formulations, but integrated with a series of practical suggestions indispensable for the functional transformation of this "rational" method, into an effective design. The report is intended to contribute to the effectiveness of methods long proposed, by suggesting practical systems for their step-by-step application so as to obtain reliable results. These suggestions are presented in a general fashion so that prescinding from the numerical values offered as examples in the text, they can be applied to situations other than those encountered by the authors. Another important factor in the application of the method is the confirmation of the validity of Miner's Rule which permits us to isolate the influence of individual design parameters, control their variability so as to determine their specific contribution to fatigue damage, and finally, and above all, to summarize these contributions, which act under widely varying conditions, in a coherent fashion. The verfication of the validity of this rule emables us to transform the current calculation procedure, i.e. the fatigue structural design scheme, which up to now has only had conceptual validity. No explanation is given in the text of the evaluation of damage due to the accumulation of permanent deformations, but a complete description can be found in the works listed in the bibliography, which provides detailed evaluation of the initial verifications made in Italy. Obviously, given the technical acceptability of the proposed procedure, it provides a valuable tool for optimum economy in both construction and maintenance of highway pavements. /Author/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 353-369

Subject/Index Terms

Filing Info

  • Accession Number: 00170222
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Mar 14 1978 12:00AM