Stability Charts for 3D Failures of Homogeneous Slopes
Stability Charts for 3D Failures of Homogeneous Slopes
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均质坡度 3D 破坏的稳定性图
DOI：
10.1061/(asce)gt.1943-5606.0000866
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发表时间：
2013-09-01
影响因子：
3.9
通讯作者：
Zhang, Ning
中科院分区：
文献类型：
--
作者：
Gao, Yufeng;Zhang, Fei;Zhang, Ning
摘要针对纯粘性土和摩擦/粘性土中均质边坡，将三维（3D）运动学允许的旋转破坏机制从坡脚破坏扩展到包括面破坏和基底破坏。在严格的极限分析框架下，推导出了一种分析方法，以获得边坡稳定性的上限和相应的临界破坏机制的类型。与有限元极限分析方法的结果相比，三维旋转破坏机制给出了最佳的上限估计。本文提出了一套三维均质边坡在静力和拟静力地震荷载作用下的稳定性图表。该方法可用于实际工程中三维均质边坡的安全性评价。
AbstractA three-dimensional (3D) kinematically admissible rotational failure mechanism is extended from toe failure to include face failure and base failure for homogeneous slopes in both purely cohesive and frictional/cohesive soils. In the strict framework of limit analysis, an analytical approach is derived to obtain the upper bounds on slope stability and the corresponding type of the critical failure mechanism. Compared with the available results from the finite-element limit-analysis method, the 3D rotational failure mechanisms give the best estimate on the upper bound. A set of stability charts is presented in a wide range of parameters for 3D homogeneous slopes under both static and pseudostatic seismic loading conditions. This set is useful in assessing the safety of the 3D homogeneous slopes in practical applications.