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NUMERICAL INVESTIGATION OF THE UNDRAINED COMPRESSION AND PULL-OUT CAPACITY OF SUCTION FOUNDATIONS IN CLAY

Abstract

This paper presents the results of three-dimensional finite difference analysis of suction foundations in uniform and non-uniform clays under undrained conditions. The Tresca criterion was used to simulate the stress-strain response. The bearing capacity of the foundations was investigated, with the degree of nonhomogeneity (kD/sum) of soil varying from 0 to 5, and the embedment depth being up to four times the foundation diameter. The end bearing capacity factor in compression and the reverse bearing capacity factor in tension were both calculated and were compared with each other under different foundation displacements. Numerical results showed that the ultimate bearing capacity factor can have the same value in cases of both compression and tension. The recommended ultimate bearing capacity factor is determined on the basis of the embedment ratio and displacement magnitude, and the displacement is not more than 30% of the foundation diameter. Finally, two equations are proposed to evaluate both the bearing capacity factor and the effective depth factor.

Keywords:

bearing capacity factor, displacement, compression, tension, depth factor

Details

Issue
Vol. 22 No. S1(86) (2015)
Section
Latest Articles
Published
15-10-2015
DOI:
https://doi.org/10.1515/pomr-2015-0044
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Open Access License

This journal provides immediate open access to its content under the Creative Commons BY 4.0 license. Authors who publish with this journal retain all copyrights and agree to the terms of the CC BY 4.0 license.

 

Author Biographies

Shouji Du,
Shanghai Jiao Tong University, Department of Civil Engineering and State Key Laboratory of Ocean Engineering



Shuilong Shen,
Shanghai Jiao Tong University, Department of Civil Engineering and State Key, Laboratory of Ocean Engineering



Authors

  • Jiaqing Du

    Shanghai Jiao Tong University, Department of Civil Engineering and State Key Laboratory of Ocean Engineering
  • Shouji Du

    Shanghai Jiao Tong University, Department of Civil Engineering and State Key Laboratory of Ocean Engineering
  • Shuilong Shen

    Shanghai Jiao Tong University, Department of Civil Engineering and State Key, Laboratory of Ocean Engineering
  • Zhenyu Yina

    LUNAM University, Ecole Centrale de Nantes

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