Direct and Indirect Local Deformations of Sand in Undrained Cyclic Triaxial Tests by Image Analysis Technique

  • Chuang ZhaoEmail author
  • Junichi Koseki
  • Yukika Miyashita
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)


A series of undrained cyclic triaxial liquefaction tests were conducted to observe directly and indirectly the local deformations of sand specimen through a transparent membrane. Black-colored silica sand, mixed in white-colored silica sand, was used for the direct evaluation. Black-colored dots, used for observing the local deformations indirectly, were pasted on membrane with a constant interval of 5 mm. Digital photographs were taken in front of the triaxial cell to evaluate the deformations of sand particles patterns and dots by Particle image Velocimetry method. The results indicated that image analysis is an efficient method for direct and indirect measurements of local deformation. Comparison of direct and indirect evaluations revealed that relative movement between sand particles pattern and an adjacent dot on the membrane had a leap when excess pore water pressure ratio reached unity.


Local Strain Axial Strain Cyclic Stress Ratio Specimen Deformation Indirect Evaluation 
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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Department of Civil EngineeringUniversity of TokyoTokyoJapan
  2. 2.Institute of Industrial ScienceUniversity of TokyoTokyoJapan

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