文献类型：期刊文献

英文题名：Effects of Fatigue Load Amplitude on the Mechanical and Energy Evolution Characteristics of Stratified Rock Mass under Triaxial Cyclic Loading and Unloading Conditions

作者：Meng, Yaoyao[1,2,3];Jing, Hongwen[3];Chen, Hao[2];Yin, Qian[1,3];Liu, Xiaowei[4];Yu, Feng[5]

机构：[1]Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster Prevent & Co, Huainan 232001, Peoples R China;[2]Shaoxing Univ, Collaborat Innovat Ctr Prevent & Control Mt Geol H, Shaoxing 312000, Peoples R China;[3]China Univ Min & Technol, State Key Lab Intelligent Construction & Hlth Oper, Xuzhou 221116, Peoples R China;[4]Yanan Univ, Xian Innovat Coll, Sch Data Sci & Engn, Xian 710100, Peoples R China;[5]Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, Huainan 232001, Peoples R China

年份：2024

外文期刊名：INTERNATIONAL JOURNAL OF CIVIL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001336693100001)、、EI(收录号：20244217210425)、WOS

基金：This work was financially supported by the Scientific Research Foundation for High-level Talents of Anhui University of Science and Technology (No. 2023yjrc77, 2021yjrc65), the State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering (No. SDGZK2414), the Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province (No. PCMGH-2023-01), the National Natural Science Foundation of China (Nos. 52074259, 52174092), the Yunlong Lake Laboratory of Deep Underground Science and Engineering Project (No. 104023002), and the State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines (No. SKLMRDPC23KF01).

语种：英文

外文关键词：Triaxial cyclic loading and unloading; Fatigue load amplitude; Energy evolution; Stratified rock mass; Mechanical properties

外文摘要：Rock failure under cyclic loading and unloading has been well studied, however, the mechanical and energy evolution mechanisms of stratified rock mass under triaxial cyclic loading and unloading (TCLU) conditions have not been fully elucidated. To reveal the effects of the fatigue load amplitude (Fmax) on the mechanical and energy evolution characteristics of rock subjected to TCLU tests, triaxial compression tests and triaxial cyclic loading and unloading tests were performed on stratified rock mass. Based on the test results, the evolution laws of the mechanical and energy parameters of the stratified rock mass with increasing number of cycles (N) were obtained, and the change laws of the mechanical and energy parameters at peak stress with increasing Fmax were analysed. Research has shown that under the joint effects of "compaction and consolidation" and "weak structure fracture", the loading modulus and Poisson's ratio greatly increased during the second cycle and gradually slowed down with increasing N. Meanwhile, the unloading modulus and Poisson's ratio changed little, the energy dissipation rate increased, and the growth rate decreased and gradually stabilized. With increasing Fmax, the peak stress, peak axial strain, peak circumferential strain, peak volume strain, Poisson's ratio, and energy dissipation rate first increased and subsequently decreased, linearly increased, linearly decreased, linearly decreased, linearly increased, and first decreased and subsequently increased respectively. The critical Fmax value of the change laws of peak stress and energy dissipation rate was 0.8.