Application of the numerical manifold method to model progressive failure in rock slopes
Application of the numerical manifold method to model progressive failure in rock slopes
复制标题
DOI：
10.1016/j.engfracmech.2014.02.022
复制
发表时间：
2014-03
影响因子：
5.4
通讯作者：
L. Wong;Zhijun Wu
中科院分区：
文献类型：
--
作者：
L. Wong;Zhijun Wu
本研究发展了数值流形方法作为研究岩质边坡渐进破坏的工具。成功地捕获了与裂纹萌生、扩展、合并和退化到最终的灾难性破坏相关的滑移面发展的整个过程。为了克服原NMM不正确去除不连续面界面黏聚力的局限性，采用了基于位移的黏聚力去除方法。本文对包含不同结构面排列的岩质边坡的简单破坏实例进行了建模，并将其结果与著名先驱Jennings(1970)[1]和Jaeger(1971)[2]提出的流行极限平衡法的结果进行了比较。研究结果表明，所开发的NMM所获得的裂纹扩展和合并类型可以帮助解释自然界和实验研究中的相关裂纹过程。
The present study develops the numerical manifold method as a tool to investigate the progressive failure in rock slopes. The entire processes of the progressive slide surface development related to crack initiation, propagation, coalescence and degradation to eventual catastrophic failure are successfully captured. To overcome the limitation of the original NMM associated with an improper removal of the interface cohesion of the discontinuities, the displacement-dependent cohesion removal method is adopted. Simple examples of failure of rock slopes containing different arrangements of discontinuities are modeled and their results are compared with those based on the popular limit equilibrium method proposed by famous pioneers Jennings (1970) [1] and Jaeger (1971) [2]. The present results illustrate that the types of crack propagation and coalescence obtained by the developed NMM can help explain the relevant cracking processes in nature and experimental studies.