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重力坝抗滑稳定的强度折减法探讨及应用
引用本文:段庆伟,陈祖煜,王玉杰,杨 健,邵 宇.重力坝抗滑稳定的强度折减法探讨及应用[J].岩石力学与工程学报,2007,26(Z2):4510-4510.
作者姓名:段庆伟  陈祖煜  王玉杰  杨 健  邵 宇
摘    要: 通过两个比较典型的重力坝坝基模型,应用有限差分强度折减法对坝基抗滑稳定进行分析,并与极限平衡的Sarma法进行对比,得到比较一致的结果,说明强度折减法在重力坝抗滑稳定分析中是可行的。同时也对强度折减法的极限状态判别标准进行初步探讨,认为对于折线型底滑面的失稳模式,用塑性区贯通的判据有所保守,用滑面以上特征点的位移突变作为极限状态判据,可得到与极限平衡法一致的结果。

关 键 词:关键词水利工程  重力坝  强度折减  抗滑安全系数
收稿时间:2007-09-29;

DISCUSSION ON STRENGTH REDUCTION METHOD FOR GRAVITY DAM STABILITY ANALYSIS AGAINST SLIDING AND ITS APPLICATION
Abstract:Based on two typical dam foundation models of gravity dams,the stability of the dam against sliding is analyzed by finite difference strength reduction method. The results obtained by this method are compared with those obtained by general Sarma¢s method;and they accord with each other well. It shows that the strength reduction method is applicable to the gravity dam stability analysis against sliding. Two criteria that identifying the limit state of strength reduction method are presented and compared. Results show that for the polygonal sliding surface,the criterion that determines whether or not the localized plastic zone breaks through completely is quite conservative,however,the criterion that identifies whether or not the displacement of the key point on the slip surface changes abruptly may give a perfect result,which is accordance with that obtained by limit equilibrium method.
Keywords:hydraulic engineering  gravity dam  strength reduction  factor of safety against sliding
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