有限元强度折减法在边坡稳定计算中的应用

On the application of the finite-element approach to the stability of side slope

对于边坡稳定性分析,有限元强度折减系数法正逐渐成为求解边坡稳定分析研究的新趋势,其基本原理是将岩土材料参数、值除以一折减系数,得到一组新的、值,然后,代入有限元进行试算,通过不断的调整折减系数,当计算结果"正好"收敛时,此时的折减系数即为边坡稳定的安全系数。此时,坡体内具有一定宽度塑性区即为边坡失稳时的滑移带。本文将有限元强度折减法在有限元Adina中进行实现,将计算结果在软件中进行显示,然后根据极限状态判据确定相应的稳定系数。结合具体的工程实例,将不同的极限状态对应的折减系数进行对比,发现稳定系数具有一致性。

Strength Reduction Finite Element Method is now becoming a new trend for slope stability analysis. The basic method is using Geotechnical Parameters、divided by Reduction Coefficient,and a new set of values will come out.Then you will constantly modify the Coefficient F by applying infinite elements to trial calculation.When the Coefficient F is just"convergent",it is the right value of slope stability.At this time the slpoe may have some degree of flexible areas called slippage zone.The results of steady coefficients accord with each other by applying the finite-element approach to Computerized Adina and to works practice.