|Table of Contents|

3-D FEM Analysis of Slope Stability Based on Gravity Increase Method(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2006年04期
Page:
49-
Research Field:
Publishing date:
2006-12-20

Info

Title:
3-D FEM Analysis of Slope Stability Based on Gravity Increase Method
Author(s):
KANG Ya-ming;  YANG Ming-cheng;  HU Yan-xiang;  REN Ke-feng
School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
Keywords:
3-D nonlinear finite element;  safety factor;  slope stability;  gravity increase method
PACS:
TU457
DOI:
-
Abstract:
A new stability analysis method, 3-D nonlinear finite element gravity increase method was developed by ANSYS software, in which associated flow rule was employed while D-P criterion was used as the yield function. The principle of this method is keeping the cohesion and inner friction angle for constant, then, carrying on the analysis again and again until the slope attains critical break appearance through increasing the gravity acceleration gradually. The failure criterion was defined to be corresponding to the jump point in the curve relating the computed displacement of the slope top to the gravity increase factor. This method fully takes into account the spatial action mechanism and cooperative deformation mechanism of soil. By using the proposed method, the possible shape or location of sliding for a semispherical failure surface or a composite failure is a part of the analytical solution, rather than assumption in advance, and this method generates safety factors comparable to those obtained by using other existing methods. It is found that the method can properly simulate the destruction of slope and it is conductive to comprehend the destructive principle of the slope. The result plays the directive guide function to project practice.

References:

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Last Update: 2006-12-20