DEFORMABILITY OF FLEXIBLE PAVEMENTS SUBJECTED TO REPEATED MOVING LOADS

The viscoelastic deformations of an asphalt concrete half space subjected to a long sequence of moving loads are calculated on the basis of laboratory creep data. The experimental creep compliance was evaluated by unconfined compressive creep tests in the temperature range between 20 and 50 C for times from 0.1 up to 1000. A simple analytical representation for the creep compliance master curve was found and introduced into the viscoelastic constitutive equations. The memory effect associated with a sequence of moving loads was calculated at different velocities, taking into account the influence of the waiting time between consecutive loads. The reference temperature for calculation was 20 C. It was shown that elastic design methods must be complemented with a specific viscoelastic analysis since the elastic theory underestimates the deformability of lower layers as compared to the surface layers. Furthermore, the contributin was found to be relevant in some critical but realistic traffic conditions: high flow density, and slow and heavy traffic. /Author/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/572/572-008.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=DEFORMABILITY+OF+FLEXIBLE+PAVEMENTS+SUBJECTED+TO+REPEATED+MOVING+LOADS&author=C.+Verga&author=G.+Battiato&author=G.+Ronca&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309024854
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Flexible Pavement Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Verga, C
  • Battiato, G
  • Ronca, G
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 97-110
• Monograph Title: Pavement Design, Performance, and Rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 572
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Acceptance tests; Asphalt concrete; Creep; Deformation; Elastic analysis; Equations; Flexible pavements; Half spaces; Live loads; Repeated loads; Traffic density; Traffic flow; Viscoelasticity; Waiting time
• Old TRIS Terms: Elastic design; Unconfined compression tests
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00139565
• Record Type: Publication
• ISBN: 0309024854
• Files: TRIS, TRB
• Created Date: Sep 16 1976 12:00AM