On the onset and propagation of shear band in undrained geomaterials
This paper presents a discontinuous approach for describing failure in geomaterials using the PUM/X-FEM taking into account for the pore water effect. For undrained case, it has been assumed that shear band initiation and propagation is related to the induced pore pressure at the ? tip. Once the shear band is initiated, the softening behavior is governed by the instantaneous loss of cohesion due to the increase of sliding. Hence, the proposed onset/propagation criterion of shear band (discontinuity) is based on a pore-pressure jump. The orientation is based on an averaged gradient of incremental displacements at the tip of the progressing shear band. This approach has been implemented in the Finite Element Program PLAXIS, and utilized to model failure of geomaterials. The verification study of the proposed the initiation/propagation procedure has been performed for biaxial test, shear test and passive retaining wall problem.
Shear band discontinuity Undrained geomaterials Softening PUM/X-FEM
E.G.SEPTANIKA V.THAKUR
Geoengineering Division, Delft University of Technology, The Netherlands PLAXIS BV, Delft, The Nethe ICG and Geotechnical Division, NTNU, Trondheim, Norway
国际会议
北京
英文
183-187
2007-08-14（万方平台首次上网日期，不代表论文的发表时间）