大变形条件下弹模对边坡应力变形的影响

The Influences of Soil Elastic Modulus on the Stress-strain Mechanism

据弹塑性大变形理论,在平面应变的条件下,用控制力的方法来控制边坡的收敛性,定性分析了弹性模量影响下边坡的应力、应变规律,对大变形和小变形对边坡塑性应变差异做了对比。计算结果表明:对于均质土坡,弹性模量对塑性区范围影响不大,对坡脚的沉降、水平位移有明显的影响。

The influences of the elastic modulus on the stress- strain mechanism of soil slope were analyzed,based on the elasto-plastic large deform hypotheses,under the plane strain contion,in which the force controlled- method is employed to take for the FEM analysis to simulate stress- strain mechanism of soil slope,meanwhile,the differences of plastic strain between large and small deformation were compared. Examples show that the elastic modulus has a marked effect on the settlement Uy and the horizontal displacement Ux of slope toe,but the effects on the plastic strain and plastic zone of the slope are not obvious.