论文部分内容阅读
基于现有边坡强度折减有限元的基本原理,建立了一套新的强度折减算法。该算法把强度参数降低的过程看成脆塑性应力跌落的过程,并设置一折减增量?k,当?k充分小时认为系统达到收敛条件而退出循环,最终的折减系数就是边坡的安全系数。该算法很容易扩展到三维边坡的稳定性分析,得到边坡滑动面滑动和破坏的发展趋势。通过2个算例,分析了进行三维模型计算的重要性,建议当地质条件复杂时宜从三维角度分析计算边坡,不能简单地将问题当作平面应变处理。
Based on the basic principle of strength reduction of existing slope, a new set of strength reduction algorithm is established. The algorithm considers the process of decreasing the strength parameter as the process of brittle plastic stress drop and sets a reduction increment k. When k is full, the system is considered to converge and exit the cycle. The final reduction factor is the slope Safety factor. The algorithm can be easily extended to the stability analysis of three-dimensional slopes, and the development trend of sliding and destruction of the sliding surface of slopes is obtained. Through two examples, the importance of 3D model calculation is analyzed. It is suggested that when the geological conditions are complicated, the slope should be analyzed and calculated from the perspective of three dimensions, and the problem can not be simply treated as plane strain.