›› 2013, Vol. 34 ›› Issue (S2): 332-337.

• Geotechnical Engineering • Previous Articles     Next Articles

Improving displacement mutation criterion of slope failure in strength reduction finite element method

ZHANG Ai-jun1 ,MO Hai-hong2   

  1. 1. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China; 2. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641, China
  • Received:2013-03-02 Online:2013-11-11 Published:2013-11-19

Abstract: While the shear strength reduction (SSR) technique based on finite element method is employed to analyze slope stability, the safety factor of slope is dependent on the criteria used for evaluating critical instability condition. Due to the existing variety and uncertainty of the criterion, the rationality and uniqueness of the numerical solution of the safety factor are in doubt; thus, it is especially important to choose an instability criterion, which can not only meet with engineering need but also can facilitate its application. Firstly, a typical example slope is analyzed by using the elastoplastic FEM based on the SSR technique in order to examine the reasonability and applicability of various criteria, such as the abruptness of the displacement , deformation at a certain characteristic location, connectivity of plastic zone. Then, an improved criterion based on the criterion of displacement has been proposed by plotting the curve of displacement multiplying power to shear strength reduction ratio.

Key words: shear strength reduction(SSR) technique, instability criterion, safety factor, displacement multiplying power

CLC Number: 

  • TU 457
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