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寻优方法在岩体结构面连通特性和综合抗剪强度研究中的应用
引用本文:杜景灿,陈祖煜,汪小刚.寻优方法在岩体结构面连通特性和综合抗剪强度研究中的应用[J].岩石力学与工程学报,2003,22(9):1441-1447.
作者姓名:杜景灿  陈祖煜  汪小刚
作者单位:1. 清华大学水利水电工程系,北京,100084
2. 清华大学水利水电工程系,北京,100084;中国水利水电科学研究院岩土研究所,北京,100044
3. 中国水利水电科学研究院岩土研究所,北京,100044
基金项目:国家自然科学基金资助项目(59974019).
摘    要:首先,通过一简单的算例,详细介绍了遗传算法和动态规划在复杂的岩体结构面网络中搜索抗剪力最小的结构面组合的方法,进而将两种方法进行对比,并通过实例说明两种方法的寻优结果是一致的。最后,讨论了剪切边界条件的选取对计算结果的影响。实例分析显示,固定剪切路径端点情况下的寻优计算的结果与不固定剪切路径端点情况下的寻优计算的结果是不同的,前者得出的连通率较小,综合抗剪强度较大。

关 键 词:岩体结构  遗传算法  动态规划  结构面连通率  剪切试验  试验模拟
文章编号:1000-6915(2003)09-1441-07
收稿时间:2002-1-15
修稿时间:2002年2月19日

APPLICATION OF OPTIMIZING METHODS IN CALCULATING PERSISTENCE RATIO AND COMPREHENSIVE SHEAR STRENGTH OF JOINTED ROCK MASS
Du Jingcan,Chen Zuyu,Wang Xiaogang.APPLICATION OF OPTIMIZING METHODS IN CALCULATING PERSISTENCE RATIO AND COMPREHENSIVE SHEAR STRENGTH OF JOINTED ROCK MASS[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(9):1441-1447.
Authors:Du Jingcan  Chen Zuyu    Wang Xiaogang
Affiliation:Du Jingcan1,Chen Zuyu1,2,Wang Xiaogang2
Abstract:The approaches of determining the joint persistence ratio of rock mass by dynamic programming and genetic algorithm methods are described based on a simple test example. In a simulated joint map,both methods are able to find the combinations of joint and rock bridge associated with the least comprehensive shear force. It is found that the two methods gave virtually the same results. The influence of two different shearing terminal conditions is investigated on the calculation results. The joint persistence ratio obtained by fixing both ends of shear path is smaller than that without fixed ends,and the comprehensive shear strength with both fixed ends of shear path is larger than that without fixed ends.
Keywords:rack mass  optimization  genetic algorithm  dynamic programming  discontinuity persistence ratio  shearing test  test simulation
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