文献类型：期刊文献

英文题名：New failure criterion for rock slopes with intermittent joints based on energy mutation

作者：Zhou, Yu[1];Lv, Wenjun[1];Zhou, Zihan[2];Tang, Qiongqiong[1];Han, Guansheng[1];Hao, Jianshuai[3];Chen, Weiqiang[4];Wu, Faquan[1]

机构：[1]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[2]Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China;[3]China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China;[4]Univ Manchester, Sch Engn, Dept Mech Aerosp & Civil Engn, Manchester M13 9PL, England

年份：2023

外文期刊名：NATURAL HAZARDS

收录：SCI-EXPANDED(收录号：WOS:000989919900001)、、Scopus(收录号：2-s2.0-85159646808)、WOS

基金：We would like to give great thanks to~National Natural Science Foundation of China (Grant No. 52204146), China Postdoctoral Science Foundation (Grant Nos. 2022M721885 and 2022M712301), Zhejiang Provincial Natural Science Foundation of China (Grant No. LQ21E040003), and Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province (No. ZJRMG-2022-01)~for providing necessary support on this research.

语种：英文

外文关键词：Intermittent joints; Step-path failure; Energy evolution; Energy mutation criterion; PFC2D

外文摘要：Step-path failure is a typical unstable mode of rock slopes with intermittent joints, and the accurate prediction of their stability is of great significance. In the present study, an energy calculation programme for the slope system based on secondary development of two-dimensional particle flow code (PFC2D) was proposed. The step-path failure modes of slopes with intermittent joints were well reproduced and could be classified into three types according to the penetration modes of rock bridges: shear penetration, tensile penetration, and tensile-shear mixed penetration. The evolution of gravitational potential energy, elastic strain energy, and kinetic energy were also captured. Based on this, the failure criterion depending on the energy mutation was established. When the slope approached the critical instability state, the gravitational potential energy reduction, kinetic energy increment, and dissipative energy increment all increased suddenly, while the elastic strain energy increment suddenly decreased, indicating that the energy mutation could be used as the failure criterion for rock slopes with intermittent joints. The proposed energy mutation criterion has the advantages of clear physical meaning, strong integrity, easy judgement, and good applicability, which provides certain theoretical support for evaluation of rock mass stability and prediction of instability of jointed slopes.