Numerical investigation of the influence of specimen size on the unconfined strength of defected rocks

被引：86
作者：
Bahrani, Navid [1 ]
Kaiser, Peter K. [2 ]
机构：
[1] Univ Toronto, Lassonde Inst Min, Toronto, ON, Canada
[2] Laurentian Univ, Bharti Sch Engn, Sudbury, ON P3E 2C6, Canada
来源：
COMPUTERS AND GEOTECHNICS | 2016年 / 77卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Defected rock strength; Specimen size; Unconfined Compressive Strength (UCS); Particle Flow Code (PFC); Grain-Based Model (GBM); Discrete Fracture Network (DFN); BONDED-PARTICLE MODEL; COMPRESSIVE STRENGTH; MECHANICS; SYSTEM; MASS;
D O I：
10.1016/j.compgeo.2016.04.004
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A grain-based distinct element model (GBM) is used to investigate the influence of specimen size on the strength of intact (not defected) and defected rocks. The defected specimens are simulated by integrating a previously calibrated GBM with Discrete Fracture Network models representing defect geometries. The results of scale effect analysis conducted on synthetic specimens show that the strength of intact specimens is independent of specimen size. However, depending on the orientation of defects relative to the loading direction, the strength of defected specimens may decrease, increase or fluctuate with increasing specimen size. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：56 / 67
页数：12
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