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Title: Uniqueness of rate-dependency, creep and stress relaxation behaviors for soft clays
Authors: Zhu, QY
Yin, ZY
Xu, CJ
Yin, JH 
Xia, XH
Keywords: Creep
Oedometer test
Soft clays
Stress relaxation
Issue Date: 2015
Publisher: Central South University of Technology
Source: Journal of Central South University, 2015, v. 22, no. 1, p. 296-302 How to cite?
Journal: Journal of Central South University 
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.
ISSN: 2095-2899
DOI: 10.1007/s11771-015-2521-y
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