Nonlinear constitutive models of rock structural plane and their applications

作     者：Wenlin Feng Shuangjian Niu Chunsheng Qiao Dujian Zou Wenlin Feng;Shuangjian Niu;Chunsheng Qiao;Dujian Zou

作者机构：School of Civil and Environmental EngineeringHarbin Institute of TechnologyShenzhenChina Shenzhen Municipal Engineering CorporationShenzhen518000China School of Civil EngineeringBeijing Jiaotong UniversityBeijing100044China 

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：2024年第16卷第3期

页      面：790-806页

核心收录：

学科分类：08[工学] 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：This work presented in this paper was funded by the National Natural Science Foundation of China(Grant Nos.51478031 and 51278046) Shenzhen Science and Technology Innovation Fund(Grant No.FA24405041).The authors are grateful to the editor and reviewers for discerning comments on this paper 

主　　题：Structural plane Engineering stability Roughness Normal stress Elasto-plastic constitutive model Discrete element method 

摘      要：Structural planes play an important role in controlling the stability of rock engineering,and the influence of structural planes should be considered in the design and construction process of rock *** this paper,mechanical properties,constitutive theory,and numerical application of structural plane are studied by a combination method of laboratory tests,theoretical derivation,and program *** test results reveal the change laws of various mechanical parameters under different roughness and normal *** the pre-peak stage,a non-stationary model of shear stiffness is established,and threedimensional empirical prediction models for initial shear stiffness and residual stage roughness are *** nonlinear constitutive models are established based on elasto-plastic mechanics,and the algorithms of the models are developed based on the return mapping *** to a large number of statistical analysis results,empirical prediction models are proposed for model parameters expressed by structural plane characteristic ***,the discrete element method(DEM)is chosen to embed the constitutive models for practical *** running programs of the constitutive models have been compiled into the discrete element model *** comparison results between the proposed model and the Mohr-Coulomb slip model show that the proposed model can better describe nonlinear changes at different stages,and the predicted shear strength,peak strain and shear stiffness are closer to the test *** research results of the paper are conducive to the accurate evaluation of structural plane in rock engineering.