基于强度折减的边坡稳定安全系数有限元迭代解法  

Finite element iteration method for safety factor of slope stability based on strength reduction method

作　　者：周桂云[1,2] 

机构地区：[1]金陵科技学院建筑工程学院,江苏南京211169 [2]中国人民解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《水利水电科技进展》2010年第3期58-61,94,共5页Advances in Science and Technology of Water Resources

基　　金：中国博士后科学基金(20080431343);金陵科技学院科研基金(jit-n-2009-014)

摘　　要：讨论有限元强度折减法的失稳判据,结果表明:失稳判据对安全系数影响较大,对临界滑动面形状和位置的确定影响不大。在此基础上,提出基于强度折减的边坡稳定安全系数有限元迭代解法,先用强度折减法搜索滑动面,再按滑动面已知边坡用迭代解法求解稳定安全系数。该方法充分结合了强度折减法和迭代解法的优点,求解边坡稳定安全系数时效率快、精度高,可为实际工程参考应用。The instability criterion of strength reduction method was discussed.The instability criterion had a great influence on the safety factor,but has a little influence on the shape and position of the critical sliding surface.On this basis,the finite element iteration method for the safety factor of slopes based on the strength reduction method was proposed.The critical sliding surface was searched by use of the strength reduction method,and then the safety factor of given slopes of the sliding surface was solved by the finite element iteration method.A conclusion is drawn that the proposed method fully combines the advantages of the strength reduction method and the iteration method.It is fast,accurate and practical in solving the safety factor for the slope stability.

关 键 词：强度折减法 迭代解法 边坡稳定安全系数 有限元法 

分 类 号：TU43[建筑科学—岩土工程]