变形参数对边坡安全系数的影响

针对强度折减弹塑性有限元方法考察边坡稳定性过程中，弹性模量E和泊松比ν是否需要折减进行了分析。对比计算表明，弹性模量E与泊松比ν的不同取值对边坡濒临破坏时特征点位移的突变性和塑性区的贯通性基本没有影响，因而对边坡安全系数的准确确定没有影响。进一步分析表明，强度折减有限元法是基于虚拟的应力场、变形场等参量来确定边坡的安全系数及相应破坏滑裂面位置的，调整弹性模量E与泊松比ν的大小不会改变这种场量的非真实性本质。因此，为了便于强度折减有限元方法在边坡稳定性分析中的运用与发展，建议在有限元计算中不对弹性模量E与泊松比ν进行折减。

Evaluation of Effect of Deformation Parameters on Slope Stability

When the elastoplastic finite element method based on the shear strength reduction(SSR) technique is employed to analyze slope stability,whether the values of elastic modulus and Poisson's ratio of slope need to be reduced or not is studied in this article.It is shown that the abruptness of the displacement or deformation at a certain characteristic location and the connectedness of plastic zone are not depended on the values of elastic modulus and Poisson's ratio.In fact,stability analysis with SSR is base...