Generation of 3D random meso-structure of soil-rock mixture and its meso-structural mechanics based on numerical tests

作     者：徐文杰 张海洋 介玉新 于玉贞 XU Wen-jie;ZHANG Hai-yang;JIE Yu-xin;YU Yu-zhen

作者机构：State Key Laboratory of Hydroscience and Hydraulic Engineering(Department of Hydraulic Engineering Tsinghua University) 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2015年第22卷第2期

页      面：619-630页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project(51109117)supported by the National Natural Science Foundation of China Project(20111081125)supported by the Independent Research Plan of Tsinghua University,China Project(2013-KY-4)supported by the State Key Laboratory of Hydroscience and Engineering Project,China 

主　　题：soil-rock mixture(S-RM) three dimensional meso-structure meso-structural mechanics(M-SM) true-triaxial numerical test random simulation 

摘      要：The mesoscopic failure mechanism and the macro-mechanical characteristics of soil-rock mixture(S-RM) under external load are largely controlled by S-RM s meso-structural features. The objective of this work is to improve the three-dimensional technology for the generation of the random meso-structural models of S-RM, for randomly generating irregular rock blocks in S-RM with different shapes, sizes, and distributions according to the characteristics of the rock blocks size distribution. Based on the new improved technology, a software system named as R-SRM3 D for generation and visualization of S-RM is developed. Using R-SRM3 D, a three-dimensional meso-structural model of S-RM is generated and used to study the meso-mechanical behavior through a series of true-triaxial numerical tests. From the numerical tests, the following conclusions are obtained. The meso-stress field of S-RM is influenced by the distribution of the internal rock blocks, and the macro-mechanical characteristics of S-RM are anisotropic in 3D; the intermediate principal stress and the soil-rock interface properties have significant influence on the macro strength of S-RM.