تحليل سه بعدي پايداري شيروانيهاي گوشه دار به روش آناليز حدي مرزبالا

Three -Dimensional Stability Analysis of Corners Using Upper-bound Theorem

Presented is a rigorous solution for the three-dimensional stability analysis of convex slopes with corners in plan view. The method is based on the upper-bound theorem of limit analysis approach. A rigid-block translational collapse mechanism is considered, with energy dissipation taking place along planar velocity discontinuities. This mechanism is optimized to obtain the minimum factor of safety for stability of the corners. The algorithm can also be used to determine the ultimate limit load of a foundation located on a corner. Based on comparisons with known solutions, the method was generally found to be accurate in predicting the stability of such slopes. The numerical results indicate that the unloaded corners are more stable than the straight slopes. Dimensionless diagrams for various corner angles are also presented.