CLC number: TU4
On-line Access: 2012-07-03
Received: 2011-12-19
Revision Accepted: 2012-05-15
Crosschecked: 2012-05-29
Cited: 2
Clicked: 6039
Yuan-yu Duan, Yi-ping Zhang, Dave Chan, Ya-nan Yu. Theoretical elastoplastic analysis for foundations with geosynthetic-encased columns[J]. Journal of Zhejiang University Science A, 2012, 13(7): 506-518.
@article{title="Theoretical elastoplastic analysis for foundations with geosynthetic-encased columns",
author="Yuan-yu Duan, Yi-ping Zhang, Dave Chan, Ya-nan Yu",
journal="Journal of Zhejiang University Science A",
volume="13",
number="7",
pages="506-518",
year="2012",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1100334"
}
%0 Journal Article
%T Theoretical elastoplastic analysis for foundations with geosynthetic-encased columns
%A Yuan-yu Duan
%A Yi-ping Zhang
%A Dave Chan
%A Ya-nan Yu
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 7
%P 506-518
%@ 1673-565X
%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100334
TY - JOUR
T1 - Theoretical elastoplastic analysis for foundations with geosynthetic-encased columns
A1 - Yuan-yu Duan
A1 - Yi-ping Zhang
A1 - Dave Chan
A1 - Ya-nan Yu
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 7
SP - 506
EP - 518
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1100334
Abstract: As a new technique in ground improvement, geosynthetic-encased columns (GECs) have promising applications in soft soil foundation. By assuming yielding occurs in the columns while the surrounding soil and the geosynthetic remain elastic, an elastoplastic analytical procedure for foundations improved by GECs is proposed. The radial stresses that the geosynthetic provides and the elastoplastic deformations of the foundation resting on a rigid base are derived. A comparison with finite element analysis shows that the proposed method is effective and can provide a reasonable prediction of a GEC’s deformation. Subsequent parametric analysis indicates that higher geosynthetic stiffness leads to better performance of the composite foundation. The optimum length of encasement is related to the load acting on the foundation and the permissible vertical and radial displacements of the column. Moreover, as the dilation angle of the column increases, the settlement decreases, especially under high loading. The influence of the encasement is more significant in soils with smaller elastic modulus.
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