On the calibration and verification of Voronoi-based discontinuous deformation analysis for modeling rock fracture

作     者：Kaiyu Zhang Feng Liu Kaiwen Xia Ying Xu Peng Dong Changyi Yu Kaiyu Zhang;Feng Liu;Kaiwen Xia;Ying Xu;Peng Dong;Changyi Yu

作者机构：College of Water Resources Science and EngineeringTaiyuan University of TechnologyTaiyuan030024China State Key Laboratory of Hydraulic Engineering Simulation and SafetySchool of Civil EngineeringTianjin UniversityTianjin300072China Department of Civil and Mineral EngineeringUniversity of TorontoTorontoM5S 1A4Canada CCCC Tianjin Port Engineering InstituteCo.Ltd.Tianjin300222China CCCC First Harbor Engineering CompanyCo.Ltd.Tianjin300461China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2023年第15卷第8期

页      面：2025-2038页

核心收录：

学科分类：08[工学] 0818[工学-地质资源与地质工程] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The authors would like to thank the National Natural Science Foundation of China(Grant Nos.51879184 and 52079091)for funding this work 

主　　题：Discontinuous deformation analysis(DDA) Voronoi tessellation Parameter calibration Confining pressure Rock fracture 

摘      要：Since its introduction,discontinuous deformation analysis(DDA)has been widely used in different areas of rock *** dividing large blocks into subblocks and introducing artificial joints,DDA can be applied to rock fracture ***,parameter calibration,a fundamental issue in discontinuum methods,has not received enough attention in *** this study,the parameter calibration of DDA for intact rock is carefully *** this end,a subblock DDA with Voronoi tessellation is presented ***,a modified contact constitutive law is introduced,in which the tensile and shear meso-strengths are modified to be independent of the bond *** improvement can prevent the unjustified preferential failure of short edges.A method for imposing confining pressure is also ***,sensitivity analysis is performed to investigate the influence of the calculated parameters and meso-parameters on the mechanical properties of modeled *** on the sensitivity analysis,a unified calibration procedure is suggested for both cases with and without confining ***,the calibration procedure is applied to two examples,including a biaxial compression *** results show that the proposed Voronoi-based DDA can simulate rock fracture with and without confining pressure very well after careful parameter calibration.