Mechanical characteristics and damage model for rock-like specimen with two parallel grout-filled cracks
文献类型：期刊论文
| 作者 | Liu, Xuewei1,2; Jia, Chuang1,2; Liu, Bin1,2; Liu, Quansheng3; Weng, Da1,2; Chen, Haixiao2 |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 133页码:18 |
| 关键词 | Grouting Two parallel cracks specimen PFC Mechanical characteristics Damage model |
| ISSN号 | 0167-8442 |
| DOI | 10.1016/j.tafmec.2024.104565 |
| 英文摘要 | To investigate the mechanical properties of rock-like specimens with two parallel cracks filled with grout, uniaxial compression tests in combination with digital image correlation (DIC) and acoustic emission (AE) techniques have been performed on grout-filled cracked specimens with different rock bridge dip angles beta. Results indicated that with the increase of beta, the uniaxial compression strength, cumulated AE count, AE energy, as well as shear crack proportion initially decreases and subsequently increases. The overall AE b-value and the DICbased maximum principal strain initially increases and subsequently decreases as beta increases. The failure mode also varies from tensile to mixed tensile-shear mode. Furthermore, a particle flow code (PFC) model, which considers the grout filling, grout-rock interface, and rock, has been proposed. Numerical results showed that the range of microcracks inclination angle first decrease from 70 degrees-100 degrees to 70 degrees-90 degrees and then increases to 70 degrees-110 degrees. Besides, existence of grout filling and changes of bridge angle leads to significant difference in PFC particle displacement, which can cause the changed of crack initiation positions and failure modes. Finally, a damage model considering stress intensity factor for the grout-filled specimen was established. Both of pre-crack damage and loading damage were considered in this model, and a damage repair factor was proposed to describe effect of grout filling. The results showed that grouting could can effectively suppress stress concentration caused by preexisting crack, thereby changes the strength of cracked specimen. |
| 资助项目 | National Natural Science Foundation of China[U22A20234] ; National Natural Science Foundation of China[42277170] ; Hubei Province key research and development project[2023BCB121] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001263155600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41878]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Bin |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xuewei,Jia, Chuang,Liu, Bin,et al. Mechanical characteristics and damage model for rock-like specimen with two parallel grout-filled cracks[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2024,133:18. |
| APA | Liu, Xuewei,Jia, Chuang,Liu, Bin,Liu, Quansheng,Weng, Da,&Chen, Haixiao.(2024).Mechanical characteristics and damage model for rock-like specimen with two parallel grout-filled cracks.THEORETICAL AND APPLIED FRACTURE MECHANICS,133,18. |
| MLA | Liu, Xuewei,et al."Mechanical characteristics and damage model for rock-like specimen with two parallel grout-filled cracks".THEORETICAL AND APPLIED FRACTURE MECHANICS 133(2024):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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