Geomechanics and Engineering

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Study on small resistance regions in post-liquefaction shear deformation based on soil's compressive properties

  • Jongkwan Kim (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Jin-Tae Han (Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Mintaek Yoo (Department of Civil & Environmental Eng., Gachon University)
  • Received : 2023.10.06
  • Accepted : 2024.01.14
  • Published : 2024.02.10
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Abstract

Understanding the post-liquefaction shear behavior is crucial for predicting and assessing the damage, such as lateral flow, caused by liquefaction. Most studies have focused on the behavior until liquefaction occurs. In this study, we performed undrained multi-stage tests on clean sand, sand-silt mixtures, and silty soils to investigate post-liquefaction shear strain based on soil compressibility. The results confirmed that it is necessary to consider the soil compressibility and the shape of soil particles to understand the post-liquefaction shear strain characteristics. Based on this, an index reflecting soil compressibility and particle shape was derived, and the results showed a high correlation with post-liquefaction small resistance characteristic regardless of soil type and fine particle content.

Keywords

Acknowledgement

Research for this paper was carried out under the KICT esearch Program (Database construction for ground liquefaction assessment based on AI technology, 2024) funded by the Ministry of Science and ICT.

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