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Influence of Intermediate Principal Stress on Undrained Behavior of Intact Clay under Pure Principal Stress Rotation

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  • Jian Zhou
  • Jiajia Yan
  • Changjie Xu
  • Xiaonan Gong

Abstract

This study presents the accumulations of the excess pore water pressure and the deformation as well as the noncoaxial behavior of intact soft clay subjected to pure principal stress rotation. Series of tests were carried out by using a dynamic hollow cylinder apparatus to highlight the influence of intermediate principal stress parameter b . It was found that the rate of PWP evolution was greatly influenced by b , but the influence was not monotonous. Specimens under the condition b = 0.75 had the highest accumulation of pore water pressure while under the condition b = 0 had the strongest resistance to the pore pressure generation. PWP accumulated mainly in the first cycle. The failure of specimens under principal stress rotation was controlled by the strain other than the pore pressure. The shear stiffness decreased more quickly with higher b value. The direction of the principal strain increment was strongly dependent on the principal stress increment orientation and less influenced by the b value and the number of cycles.

Suggested Citation

  • Jian Zhou & Jiajia Yan & Changjie Xu & Xiaonan Gong, 2013. "Influence of Intermediate Principal Stress on Undrained Behavior of Intact Clay under Pure Principal Stress Rotation," Mathematical Problems in Engineering, Hindawi, vol. 2013, pages 1-10, November.
    • Handle: RePEc:hin:jnlmpe:950143
    DOI: 10.1155/2013/950143
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