【摘要】 从边坡安全系数的基本定义出发,通过边坡"虚拟工况"概念,提出有限元离心加载分析边坡稳定性的方法.在K倍重力场作用下,对边坡岩土内摩擦角进行相应的折减,用有限元计算至极限平衡状态(即边坡综合下滑力增大至K倍,综合抗滑力不变而达到极限平衡状态),从而得到边坡的安全系数K.此法弥补了以往离心加载方法计算边坡稳定性的不足.其计算结果与强度折减法相互认证,表明有限元离心加载法是另一种利用有限元计算边坡稳定性的可靠方法.更多还原

【Abstract】 Based on the original definition of slope safety factor,centrifuge loading finite element method(CLFEM) is presented by the "virtual state" of slope for the analysis of slope stability.In the "virtual state",with K times normal gravity field and corresponding reduced internal friction angle,the slope reaches to limit equilibrium state by FEM,that is,the synthesized downward slippery force becomes K times as original while the synthesized resistance force remains constant.Then,we can get the slope safety factor K according to the limit equilibrium state.The CLFEM remedy defects of other Slope Stability Analysis method by Centrifuge Loading.Compared with the strength reduction FEM,the result indicates that the CLFEM is a reliable FEM for the analysis of slope stability.更多还原