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Uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays

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Abstract

This work focuses on the uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays under one-dimensional condition. An elasto-viscoplastic model is briefly introduced based on the rate-dependency of preconsolidation pressure. By comparing the rate-dependency formulation with the creep based formulation, the relationship between rate-dependency and creep behaviors is firstly described. The rate-dependency based formulation is then extended to derive an analytical solution for the stress relaxation behavior with defining a stress relaxation coefficient. Based on this, the relationship between the rate-dependency coefficient and the stress relaxation coefficient is derived. Therefore, the uniqueness between behaviors of rate-dependency, creep and stress relaxation with their key parameters is obtained. The uniqueness is finally validated by comparing the simulated rate-dependency of preconsolidation pressure, the estimated values of secondary compression coefficient and simulations of stress relaxation tests with test results on both reconstituted Illite and Berthierville clay.

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Authors and Affiliations

  1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Qi-yin Zhu  (朱启银), Zhen-yu Yin  (尹振宇) & Xiao-he Xia  (夏小和)

  2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Qi-yin Zhu  (朱启银)

  3. Ecole Centrale de Nantes, UMR CNRS GeM, Lunan University, Nantes, France

    Zhen-yu Yin  (尹振宇)

  4. School of Civil Engineering and Architecture Departments, East China Jiaotong University, Nanchang, 330013, China

    Chang-jie Xu  (徐长节)

  5. Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, China

    Jian-hua Yin  (殷建华)

Authors
  1. Qi-yin Zhu  (朱启银)
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  2. Zhen-yu Yin  (尹振宇)
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  3. Chang-jie Xu  (徐长节)
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  4. Jian-hua Yin  (殷建华)
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  5. Xiao-he Xia  (夏小和)
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Corresponding author

Correspondence to Zhen-yu Yin  (尹振宇).

Additional information

Foundation item: Projects(41372285, 41272317, 51278449, 51238009) supported by the National Natural Science Foundation of China; Project (20110073120012) supported by Research Fund for the Doctoral Program of Higher Education of China; Project(PIAPP-GA-2011-286397) supported by the European Program CREEP

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Zhu, Qy., Yin, Zy., Xu, Cj. et al. Uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays. J. Cent. South Univ. 22, 296–302 (2015). https://doi.org/10.1007/s11771-015-2521-y

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  • DOI: https://doi.org/10.1007/s11771-015-2521-y

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