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| DOI | 10.1155/2022/6220549 |
| Mechanical Behavior of Cracked Rock in Cold Region Subjected to Step Cyclic Loading | |
| Zhang, Liang; Niu, Fujun; Liu, Minghao; Luo, Jing; Ju, Xin | |
| 通讯作者 | Niu, FJ ; Liu, MH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China. |
| 发表日期 | 2022 |
| ISSN | 1468-8115 |
| EISSN | 1468-8123 |
| 卷号 | 2022 |
| 英文摘要 | In order to analyze the mechanical behavior of cracked rock in cold region subjected to cyclic loading, step cyclic loading and unloading (SCLU) triaxial tests with different stress paths have been designed. The mechanical responses such as strength, deformation, and failure mode were analyzed. The test results show that limestone has obvious strengthening effect under cyclic loading due to local crushing and filling of internal structural plane. The strengthening effect and fatigue damage effect caused by cyclic loading and the impact damage effect caused by the upgraded of stress level have an effect on mechanical response of cracked rock, and the degree of influence is related to the stress path. Under the stress path of constant stress lower limit (CSLL), the strengthening effect of rock was more prominent and its strength was enhanced. It was mainly subjected to progressive fatigue damage and had a buffering effect in the failure process. However, under the stress path of increasing the stress lower limit (ISLL), the rock suffered significant impact damage and entered the fatigue damage stage in advance, which led to its strength reduction and sudden failure when entering the next stress level. In addition, during the loading process, larger initial stress amplitudes led to more obvious cyclic strengthening effects, while smaller initial stress amplitudes led to greater plastic deformation and energy dissipation, and the rock was more prone to progressive damage. |
| 关键词 | FRACTURE PROCESS ZONEEVOLUTIONFATIGUEFPZ |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics ; Geology |
| WOS类目 | Geochemistry & Geophysics ; Geology |
| WOS记录号 | WOS:000767045500003 |
| 来源期刊 | GEOFLUIDS
 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/253640 |
| 作者单位 | [Zhang, Liang; Niu, Fujun; Liu, Minghao; Luo, Jing; Ju, Xin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zhang, Liang; Ju, Xin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Liang,Niu, Fujun,Liu, Minghao,et al. Mechanical Behavior of Cracked Rock in Cold Region Subjected to Step Cyclic Loading[J]. 中国科学院西北生态环境资源研究院,2022,2022. |
| APA | Zhang, Liang,Niu, Fujun,Liu, Minghao,Luo, Jing,&Ju, Xin.(2022).Mechanical Behavior of Cracked Rock in Cold Region Subjected to Step Cyclic Loading.GEOFLUIDS,2022. |
| MLA | Zhang, Liang,et al."Mechanical Behavior of Cracked Rock in Cold Region Subjected to Step Cyclic Loading".GEOFLUIDS 2022(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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