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《Journal of Disaster Prevention and Mitigation Engineering》 2009-06
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Numerical Analysis of Behavior of Uplift Resistance of Piles with Enlarged Base

ZHANG Jin-li1,RUAN Xiao-zheng1,CAI Gui-lin2(1.State Key Laboratory of Coastal and Offshore Engineering,School of Civil and Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China;2.Fushun Petrochemical Corporation Division,Fushun 113008,China)  
A three-dimensional elastic-plastic model of an uplift-resistant pile with enlarged base was constructed with the general-purpose software ABAQUS.The behavior of uplift resistance of the pile was studied with the finite element model.In order to validate the finite element model,the computational result was compared with that of an in-situ full-scale pile test.The comparison shows that the behavior of uplift resistance of piles with enlarged base can be simulated with the model.Then the distributional characteristics of axial force and frictional force,the developing regularity of deformation and plastic strain in soils surrounding the pile body and base,and the effect of the enlarged base to vertical stress in soils were studied.At the same time,by changing the parameters,the sensitivity was analyzed for different diameters,lengths,expansion angles of the enlarged base,and the characteristics of soils where the enlarged base was embedded;and the analysis shows that the diameter of the enlarged base and the characteristics of surrounding soils have relatively great effect on the uplift-resistant capacity while the effect of the height of the enlarged base is rather little.
【Fund】: 国家自然科学基金项目(50679015)资助
【CateGory Index】: TU473.11
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