利用有限元强度折减法分析岩质边坡的稳定性

基于有限元强度折减法,利用ANSYS有限元软件,对岩质边坡在地应力作用下进行了稳定性分析。选用D-P屈服准则,以边坡的位移计算不收敛及塑性区贯通作为边坡失稳判据,得到边坡的安全系数及破坏滑动面。通过与成熟的极限平衡法做比较,证明边坡稳定性安全系数是合理的,从而也说明强度折减法在岩质边坡稳定性分析中的优越性。

On analysis of stability of rock slope by finite element strength reduction method

This paper mainly based on finite element strength reduction method, using ANSYS finite element software, analysis the stability of rock side slope under the crustal stress. D-P yield criterion is selected to calculate the non-convergence and the connectivity of plastic zone as the criterion of side slope instability according to the displacement of the side slope. Concludes the safety coefficient of the slope and its damage sliding surface. Through comparing the ripe limit equilibrium method, proved the rationality of rock side slope stability safety factor, thus explained the superiority of finite element strength reduction method in the analysis of the stability of rock side slope.