Full Text:   <6842>

Summary:  <2007>

CLC number: TU433

On-line Access: 2014-04-03

Received: 2013-10-10

Revision Accepted: 2014-01-06

Crosschecked: 2014-03-17

Cited: 1

Clicked: 7091

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.4 P.272-281


A modified creep index and its application to viscoplastic modelling of soft clays*

Author(s):  Qi-yin Zhu1, Ze-xiang Wu1, Yan-ling Li1, Chang-jie Xu2,3, Jian-hua Wang1, Xiao-he Xia1

Affiliation(s):  1. Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; more

Corresponding email(s):   qiyin.zhu@gmail.com

Key Words:  Clays, Creep, Consolidation test, Embankment, Finite element method, Viscoplasticity

Qi-yin Zhu, Ze-xiang Wu, Yan-ling Li, Chang-jie Xu, Jian-hua Wang, Xiao-he Xia. A modified creep index and its application to viscoplastic modelling of soft clays[J]. Journal of Zhejiang University Science A, 2014, 15(4): 272-281.

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author="Qi-yin Zhu, Ze-xiang Wu, Yan-ling Li, Chang-jie Xu, Jian-hua Wang, Xiao-he Xia",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T A modified creep index and its application to viscoplastic modelling of soft clays
%A Qi-yin Zhu
%A Ze-xiang Wu
%A Yan-ling Li
%A Chang-jie Xu
%A Jian-hua Wang
%A Xiao-he Xia
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 4
%P 272-281
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%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300331

T1 - A modified creep index and its application to viscoplastic modelling of soft clays
A1 - Qi-yin Zhu
A1 - Ze-xiang Wu
A1 - Yan-ling Li
A1 - Chang-jie Xu
A1 - Jian-hua Wang
A1 - Xiao-he Xia
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 4
SP - 272
EP - 281
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300331

Conventional consolidation tests on reconstituted specimens of numerous natural soft clays show a decreasing of creep index C αe with increasing soil density. Based on all selected and conducted experimental results, a modified creep index C αe * defined in double logarithmic plane lge-lgt, was plotted for various clays, from which C αe * can be assumed as a constant for different soil densities. Then, the modified creep index was applied to a newly developed elastic viscoplastic model. In this way, the modified creep index C αe * can naturally take into account the nonlinear C αe revealing the influence of soil density in the soil assemblies without additional parameters. Finally, the enhanced model was incorporated into the finite element code ABAQUS and used to simulate a consolidation test and a test embankment. The improvement of simulations by the modified creep index was highlighted by comparing simulations using the conventional creep index C αe.




Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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