REPEATED LOAD MODEL FOR SUBGRADE SOILS: MODEL DEVELOPMENT

A load deformation model for subgrade soils is developed, where total cumulative axial strains are correlated with applied stresses and number of load repetitions. The model is based on the results of repeated load tests for a compacted silty clay. The concept of a constant failure strain independent of load history is presented and used in the proposed model. Results of static triaxial tests, slow cyclic tests, and repeated load tests are used to verify that the failure strain for given compaction conditions and confining pressure is essentially independent of stress history. Good agreement is obtained between predicted strains and experimental values from repeated load tests. Model predictions are within plus or minus 10% of experimental results.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1990/1278/1278-009.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=REPEATED+LOAD+MODEL+FOR+SUBGRADE+SOILS%3A+MODEL+DEVELOPMENT&author=L.+Raad&author=B.+Zeid&publication_year=1990
• Availability:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1278, Dynamic Testing of Aggregates and Soils and Lateral Stress Measurements 1990. 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:
  • Raad, Lufti
  • Zeid, Bassam A
• Publication Date: 1990

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 72-82
• Monograph Title: Dynamic testing of aggregates and soils and lateral stress measurements
• Serial:
  • Transportation Research Record
  • Issue Number: 1278
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Alternatives analysis; Applied mechanics; Compacted clays; Deformation; Forecasting; Mathematical models; Repeated loads; Silty clays; Strain (Mechanics); Stresses; Subgrade (Pavements)
• Uncontrolled Terms: Applied stress; Axial strain
• Old TRIS Terms: Test results
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00605543
• Record Type: Publication
• ISBN: 0309050553
• Files: TRIS, TRB, ATRI
• Created Date: Mar 31 1991 12:00AM