›› 2009, Vol. 30 ›› Issue (4): 1131-1136.

• Numerical Analysis • Previous Articles     Next Articles

Study of ultimate bearing capacity of two-layered subsoil under combined loading

ZHANG Qi-yi 1, 2，LUAN Mao-tian1   

  1. 1. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; 2. School of Architectural and Civil Engineering, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2007-03-10 Online:2009-04-10 Published:2011-01-30

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Abstract:

To evaluate the ultimate bearing capacity of inhomogeneous subsoil under combined loading is very valuable in engineering practice and significant in theory. Based on limit equilibrium theory of soil, the ultimate bearing capacity of undrained two-layered subsoil under combined loading is achieved by using the general-purpose finite element analysis package ABAQUS. The critical thickness of upper soil Hcr, the ultimate bearing capacity of vertical loading Pv and the failure envelope under combined loading are presented. It is found that the critical thickness of upper soil mainly depends on the undrained shear strength ration of Su1/Su2; the ultimate bearing capacity of undrained two-layered subsoil and the failure envelope under combined loading mainly depends on the thickness of upper soil H1, undrained shear strength ration of Su1/Su2 and shape of foundations.

Key words: ABAQUS, combined loading, ultimate bearing capacity, two-layered subsoil, critical thickness, failure envelope

CLC Number: 

  • TU 470
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