›› 2015, Vol. 36 ›› Issue (S1): 71-75.doi: 10.16285/j.rsm.2015.S1.013

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Extension of limit equilibrium conditions and stability analysis of geotechnical structures

SHAO Long-tan, LIU Shi-yi   

  1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, Liaoning 116024, China
  • Received:2015-03-15 Online:2015-07-11 Published:2018-06-14

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Abstract: In the engineering of soils stability, evaluation of earth pressure, foundation bearing capacity and slope stability are all related to limit equilibrium conditions. Limit equilibrium conditions of a soil element are extended to limit equilibrium conditions of a slip surface. Necessary and sufficient conditions required for determining the limit equilibrium state is proven. Based on the extension, a stability method combining limit equilibrium analysis with finite element stress analysis to provide a factor of safety is proposed. And the physical interpretation of the definition of the factor of safety is offered. Then several representative two-dimensional examples about soils stability are analyzed. The results show that the method could be used to analyze the stability of geotechnical structures.

Key words: limit equilibrium, finite elements, stability, factor of safety, limit load

CLC Number: 

  • TB 115
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