›› 2009, Vol. 30 ›› Issue (S2): 97-101.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Multiple solutions in upper bound limit analysis of soil slopes

LI Liang, YU Guang-ming, CHU Xue-song, LU Shi-bao, HONG Yong   

  1. School of Civil Engineering, Qingdao Technological University,Qingdao 266033, China
  • Received:2009-08-17 Online:2009-08-10 Published:2011-06-21

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Abstract:

The assumption of existence of total plastic zone is made in the upper bound limit analysis, i.e. there exists a sliding body satisfying yielding equation in slopes. However, the mobilized extent of inter-slice strength is taken as optimized variables in this paper; and multiple solutions can be obtained by using virtual work-energy equation. The solution which is the biggest among those multiple ones is used to assess the stability for given sliding body. Two soil slopes are analyzed using the proposed method; and the results are compared to those by general upper bound method. The effect of this assumption on the stability results is given.

Key words: limit analysis, soil slope stability, Pan’s principles, factor of safety

CLC Number: 

  • TU 441
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