Full Text:   <6490>

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CLC number: TU432

On-line Access: 2013-01-31

Received: 2012-08-04

Revision Accepted: 2012-11-13

Crosschecked: 2013-01-23

Cited: 7

Clicked: 7863

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.2 P.101-109

http://doi.org/10.1631/jzus.A1200121


Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method*


Author(s):  Ke Zhang1, Ping Cao1, Rui Bao2

Affiliation(s):  1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China; more

Corresponding email(s):   zhangke_csu@163.com

Key Words:  Shear strength reduction, Strain-softening, Peak strength, Residual strength, Progressive failure analysis


Ke Zhang, Ping Cao, Rui Bao. Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method[J]. Journal of Zhejiang University Science A, 2013, 14(2): 101-109.

@article{title="Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method",
author="Ke Zhang, Ping Cao, Rui Bao",
journal="Journal of Zhejiang University Science A",
volume="14",
number="2",
pages="101-109",
year="2013",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1200121"
}

%0 Journal Article
%T Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method
%A Ke Zhang
%A Ping Cao
%A Rui Bao
%J Journal of Zhejiang University SCIENCE A
%V 14
%N 2
%P 101-109
%@ 1673-565X
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200121

TY - JOUR
T1 - Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method
A1 - Ke Zhang
A1 - Ping Cao
A1 - Rui Bao
J0 - Journal of Zhejiang University Science A
VL - 14
IS - 2
SP - 101
EP - 109
%@ 1673-565X
Y1 - 2013
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1200121


Abstract: 
Based on the strength reduction method and strain-softening model, a method for progressive failure analysis of strain-softening slopes was presented in this paper. The mutation is more pronounced in strain-softening analysis, and the mutation of displacement at slope crest was taken as critical failure criterion. An engineering example was provided to demonstrate the validity of the present method. This method was applied to a cut slope in an industry site. The results are as follows: (1) The factor of safety and the critical slip surface obtained by the present method are between those by peak and residual strength. The analysis with peak strength would lead to non-conservative results, but that with residual strength tends to be overly conservative. (2) The thickness of the shear zone considering strain-softening behaviour is narrower than that with non-softening analysis. (3) The failure of slope is the process of the initiation, propagation and connection of potential failure surface. The strength parameters are mobilized to a non-uniform degree while progressive failure occurs in the slope. (4) The factor of safety increases with the increase of residual shear strain threshold and elastic modulus. The failure mode of slope changes from shallow slip to deep slip. Poisson’s ratio and dilation angle have little effect on the results.

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

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