Enhanced strain-softening model from cyclic full-flow penetration tests

Shmulik Pinkert, Assaf Klar

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


This paper presents a systematic approach for relating fundamental (soil element) strength-degradation models with cyclic fullflow penetration tests. The approach is then employed to enhance the commonly-used exponential strain-softening model by adding a parameter that regulates the slope of degradation. Using the developed methodology, a new relationship between ξ95 and N95 (the shear strain and cycle number associated with 95% degradation in strength and penetration resistance, respectively) is established for the enhanced strainsoftening model. The additional parameter of the enhanced model is optimized against various cyclic field test results and found to be roughly constant. It is demonstrated that the new model independently reproduces the field test results when introduced into advanced numerical analyses of cyclic penetration tests.

Original languageEnglish
Article number04015087
JournalJournal of Geotechnical and Geoenvironmental Engineering - ASCE
Issue number3
StatePublished - 1 Mar 2016
Externally publishedYes


  • Cyclic penetration test
  • Full-flow
  • Strain softening

ASJC Scopus subject areas

  • General Environmental Science
  • Geotechnical Engineering and Engineering Geology


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