文献类型：期刊文献

英文题名：Damage and energy evolution of rock joints under varying normal Stresses: Experimental and fractal study

作者：Hou, Dong-qi[1];Mo, Ru-jun[1];Song, Leibo[2,3,4];Liu, Jian[3];Liu, Yin[2]

机构：[1]PowerChina, Chengdu Engn Corp Ltd, Chengdu 610072, Peoples R China;[2]Shaoxing Univ, State Key Lab Intelligent Deep Met Min & Equipment, Shaoxing 312000, Peoples R China;[3]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China;[4]Shaoxing Univ, Sch Civil Engn, Zhejiang Key Lab Rock Mech & Geohazards, Shaoxing 312000, Peoples R China

年份：2025

卷号：27

外文期刊名：RESULTS IN ENGINEERING

收录：ESCI(收录号：WOS:001541341600010)、EI(收录号：20253018825047)、Scopus(收录号：2-s2.0-105011045052)、WOS

基金：The authors sincerely thank the financial support from the Key Technology Research Projects of Power China (No. DJ-HXGG-2023-04), the National Natural Science Foundation of China (No. 42472345), the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering (No. SKLGME023007) and the Open Fund of Badong National Observation and Research Station of Geohazards (No. BNORSG202308).

语种：英文

外文关键词：Rock joints; Shear damage; 3D scanning; Fractal dimension; Energy transformation

外文摘要：Shear damage and energy evolution in natural rock joints are vital for assessing the stability of engineering structures like tunnels and slopes. This study investigates the shear behavior and energy transformation of natural rock joints under varying normal stresses through a combination of experimental testing and fractal analysis. Utilizing a self-developed shear test system, we conducted systematic experiments on fine-grained granite joints subjected to normal stresses ranging from 1 to 10 MPa. The results reveal that shear stress increases linearly with normal stress, while shear displacement-stress curves exhibit fluctuations caused by surface asperity failures. Notably, shear damage patterns evolve from localized dot-like features to extensive wave-like patterns as normal stress intensifies. Energy analysis shows a two-stage growth pattern in shear failure energy: rapid accumulation at low stresses dominated by frictional resistance, followed by slower growth at higher stresses driven by micro-convexity snapping. Furthermore, three-dimensional scanning and fractal dimension theory were applied to quantify morphological changes in joint surfaces, demonstrating that fractal dimension degradation values correlate linearly with normal stress. These findings enhance our understanding of the mechanical behavior and energy transformation characteristics of rock joints, offering valuable insights for assessing the stability of engineering structures influenced by rock joints.