VISCOUS BEHAVIOUR OF GEOGRIDS; EXPERIMENT AND SIMULATION

• KONGKITKUL W.

  Department of Civil Engineering, Tokyo University of Science

• HIRAKAWA DAIKI

  Department of Civil Engineering, Tokyo University of Science

• TATSUOKA FUMIO

  Department of Civil Engineering, Tokyo University of Science

Abstract

The viscous properties of three types of geogrid polymer were evaluated by sustained loading tests lasting for 30 days at a load level about a half of its nominal rupture strength. The sustained loading tests were performed during otherwise monotonic loading (ML) at constant strain or load rate, unlike the conventional creep tests, in which the strain rate immediately before the start of sustained loading, which controls the creep strain rate, is not controlled or even not recorded. The following are presented in this study. The tensile rupture strength measured by ML that was started following a 30 day-long sustained loading was essentially the same as the one at the same strain rate at rupture obtained by continuous ML without any intermission of sustained loading. This fact indicates that creep is not a degrading phenomenon. Then, if free from chemical and mechanical degrading effects, the strength of a geosynthetic reinforcement (for a given strain rate at rupture) can be maintained until late in its service life. A non-linear three-component model is used to simulate the experimental results from the previous and present studies. The model can simulate very well not only the load-strain behaviour during ML with and without step changes in the strain rate and the one after sustained loading, but also the time histories of creep strain during sustained loading for short (one hour) and long (30 days) periods.<br>

Journal

• SOILS AND FOUNDATIONS

  SOILS AND FOUNDATIONS 47 (2), 265-283, 2007

  The Japanese Geotechnical Society

Keywords

• creep
• geogrid
• geosynthetic reinforcement
• non-linear three-component model
• rupture strength
• simulation
• strain rate
• sustained loading
• tensile loading test
• viscous property
• (<b>IGC</b>: D6/M9)

Details

• CRID: 1390282679644310912
• NII Article ID: 110007327204
• NII Book ID: AA00700879
• DOI: 10.3208/sandf.47.265
• ISSN: 18811418
• ISSN: 00380806
• ISSN: http://id.crossref.org/issn/00380806
• Web Site: https://api.elsevier.com/content/article/PII:S0038080620305151?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S0038080620305151?httpAccept=text/plain
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10450259
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed