BEARING BEHAVIOUR OF STRIP FOUNDATIONS ON UNDRAINED TWO-LAYERED SUBSOIL SUBJECTED TO ECCENTRICAL LOADING

Zhan Yungang; Yuan Fanfan; LuanMaotian

doi:10.13204/j.gyjz200709018

Volume 37 Issue 9

Dec. 2014

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Zhan Yungang, Yuan Fanfan, LuanMaotian. BEARING BEHAVIOUR OF STRIP FOUNDATIONS ON UNDRAINED TWO-LAYERED SUBSOIL SUBJECTED TO ECCENTRICAL LOADING[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(9): 80-83. doi: 10.13204/j.gyjz200709018

Citation:

Zhan Yungang, Yuan Fanfan, LuanMaotian. BEARING BEHAVIOUR OF STRIP FOUNDATIONS ON UNDRAINED TWO-LAYERED SUBSOIL SUBJECTED TO ECCENTRICAL LOADING[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(9): 80-83. doi: 10.13204/j.gyjz200709018

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BEARING BEHAVIOUR OF STRIP FOUNDATIONS ON UNDRAINED TWO-LAYERED SUBSOIL SUBJECTED TO ECCENTRICAL LOADING

doi: 10.13204/j.gyjz200709018

1.
1. Institute of Rock and Soil Mechanics,The Chinese Academy of Science Wuhan 430071;
2.
2. Institute of Geotechnical Engineering,School of Civil and Hydraulic Engineering The State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology Dalian 116024

Received Date: 2007-03-12
Publish Date: 2007-09-20

Abstract

Abstract

Two -dimensional finite element analysis of strip surface foundations resting on undrained two -layered subsoilunder the effect of combined vertical(V)and moment(M)loading has been applied to investigate the ultimate bearingcapacity and failure mechanism of the subsoil. In this analysis, the material response of the soil is represented with elasticperfectly plastic constitutive law yielding according to Mohr -Coulomb failure criterion. The surface foundation is assumed tohave no uplift capacity, and the footing may detach from subsoil under a V -M load combination, which is significantlydifferent from the fully attached footing. The ultimate bearing capacity of the foundation on layered subsoil is presented interms of the failure envelope in vertical and moment loading space. The effects of the thickness of upper soil, the width offooting and the shear strength of soilson the shape of the failure envelope are examined in details. It is found that the shapeof failure envelope ismainly depended onthe thickness of upper soil and the undrained shear strength ratio of two layers, andthe failure mechanism has two forms according to the combination of V -M loads.
- finite element analysis,
- foundation,
- ultimate bearing capacity,
- failure envelope

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References(14)

References

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