FAILURE MODELS AND PAVEMENT DESIGN AND REHABILITATION SYSTEMS DEVELOPED AND ADAPTED FOR CONDITIONS PREVAILING IN THE NORDIC COUNTRIES
Application of the road test results in other areas than the test site faces three main problems: pavement failure mechanisms; subgrade characteristics and their seasonal variation; the relation between failure and axle load spectrum. These problems have been dealt with in a joint research effort in the Nordic countries (Denmark, Finland, Iceland, Norway and Sweden), which has been in operation since the beginning of 1974. Three failure models (AASHO modified, Texas and Ontario) have been fitted to serviceability data from test roads and found applicable when using the same parameter values as those giving the best fit in their orginal application. In an analytical examination of pavements complying with Nordic standard specifications, assuming current asphaltic pavement fatigue criteria, a range of subgrade criteria was reached, which contained within its limits the Shell subgrade formula. Examination of the power law for load equivalence factors gave an exponent range around four. From a previous quite extensive axle load study at some 200 test points in the Swedish road network vehicle equivalent factors have been calculated, using different exponent values in the "fourth power formula". It was found that variation in the exponent had much greater influence upon the vehicle equivalent factors than variation in the traffic load spectrum. Application of the analytical design and rehabilitation models (SAMP) to Nordic conditions have been examined and an extension of such systems applicable to decision processes for rehabilitation is suggested. /Author/
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Supplemental Notes:
- Volume I of proceedings of 4th International Conference on Structural Design of Asphalt Pavements, Ann Arbor, Michigan, August 22-26, 1977.
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Corporate Authors:
University of Michigan, Ann Arbor
Department of Civil Engineering
Ann Arbor, MI United States 48109 - Conference:
- Publication Date: 1977-1
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 903-919
Subject/Index Terms
- TRT Terms: Axial loads; Driver rehabilitation; Failure; Mathematical models; Pavement design; Pavement maintenance; Road tests; Seasons; Serviceability; Subgrade (Pavements); Traffic equivalence factor
- Uncontrolled Terms: Models; Rehabilitation; Seasonal variations
- Subject Areas: Design; Highways; Pavements; Vehicles and Equipment;
Filing Info
- Accession Number: 00170257
- Record Type: Publication
- Report/Paper Numbers: Proceeding
- Files: TRIS
- Created Date: Mar 29 1978 12:00AM