【摘要】 借助 Hill 的材料应变局部化原理和土的弹塑性本构模型,应用声学张量示踪边坡失稳滑移线发生和发展,提出了局部加载条件下的确定边坡失稳滑移线的方法。在弹塑性有限元分析过程中,应用边坡材料的塑性一致性条件或滑移线两侧的应力连续条件,即应变局部化条件,检测每一个高斯点的声学张量行列式的值,当其等于或接近 0 时,标出滑移萌生的位置、方向,模拟边坡滑移线萌生和发展过程。更多还原

【Abstract】 A new method to define slippage line under local loading condition is presented based on Hill’s principle of strain bifurcation and the elastoplastic constitutive model of soil. It can tail how slippage line formed and developed, and can reveal process of onset and evolution of slippage point and directions in elastoplastic slope body also. In practice, it is convenience to define the location and movement direction of slippage line in the slope by the elastoplastic continuum with finite element increment numerical method. During each step in elastoplasticity, whether the determinant of acoustic tensor on each Gauss point equals zero or not should be checked, once it equals zero or near to zero, mark the point and the movement direction. With some points are marked and arrayed regularly, the slippage line will be formed.更多还原