Equivalent time and elastic visco-plastic modelling of geomaterials

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10 Citations (Scopus)


The concepts of equivalent time, reference time line etc. are introduced and a simple one-dimensional elastic visco-plastic model (1-D EVP) is derived. Yin and Graham's 1-D EVP model and its verification are also introduced. The creep data of a marine clay and a soft salt rock are used to examine the loading-history independence of equivalent time and creep strain rate. It is shown that the general 1-D EVP model will approach to the elastic line and the reference time line (elastic-plastic line) when the creep parameter ψ/V approaches to zero.
Original languageChinese (Simplified)
Pages (from-to)124-128
Number of pages5
JournalYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
Issue number2
Publication statusPublished - 1 Jan 1999

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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