Experimental study on dynamic failure behavior of red sandstone after freeze-thaw cycles
文献类型：期刊论文
| 作者 | Yu, Yang1; Jiang, Qincai1; Liu, Qiang1; Feng, Guangliang1,2; Zeng, Jianjun1; Lu, Yuyin1 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 451页码:16 |
| 关键词 | Red sandstone Freeze-thaw cycle Dynamic mechanics Energy dissipation rate Fractal features |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2024.138582 |
| 英文摘要 | The rock mass in the alpine region is affected by freeze-thaw cycles all year round, and the mechanical properties of rock mass will deteriorate under the impact load such as blasting vibration in the freeze-thaw area, which will affect the safety and stability of rock mass engineering. To investigate the effects of freeze-thaw cycles on the dynamic mechanical properties of sandstone, a separated Hopkinson compression bar test system is used to conduct dynamic impact tests on sandstone specimens with different freeze-thaw cycles, The dynamic mechanical properties, energy dissipation, and fracture fractal characteristics of sandstone specimens during loading with different freeze-thaw cycles and strain rates are analyzed. The experimental results show that the dynamic yield strength of sandstone is positively linearly correlated with strain rate and has a significant strainrate effect, the energy dissipation rate of sandstone is positively correlated with the strain rate, but the elastic modulus of sandstone does not exist rate correlation with different freeze-thaw cycles. The dynamic peak strength and unit volume dissipation energy show a three-stage decrease with the number of freeze-thaw cycles, while the fractal dimension is the opposite. The decrease of cementation material, the dissolution of some minerals in water and the deterioration of pore structure are the fundamental reasons that affect the macroscopic dynamic mechanical properties of red sandstone. As the number of freeze-thaw cycles increases, ductile failure begins to occur, but the required dissipation energy decreases. The above research results can provide reference for the stability evaluation of rock mass engineering in alpine regions. |
| 资助项目 | National Natural Science Foundation of China[42177156] ; Major Scientific Equipment Project of State Key Laboratoryof Geo-mechanics and Geotechnical Engineering[E011011501] ; Natural Science Foundation of Jiangxi Province[20243BBG71034] ; Natural Science Foundation of Jiangxi Province[20224ACB204021] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001341120900001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42972]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Feng, Guangliang |
| 作者单位 | 1.East China Jiaotong Univ, State Key Lab Performance Monitoring & Protecting, Nanchang 330013, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Yang,Jiang, Qincai,Liu, Qiang,et al. Experimental study on dynamic failure behavior of red sandstone after freeze-thaw cycles[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,451:16. |
| APA | Yu, Yang,Jiang, Qincai,Liu, Qiang,Feng, Guangliang,Zeng, Jianjun,&Lu, Yuyin.(2024).Experimental study on dynamic failure behavior of red sandstone after freeze-thaw cycles.CONSTRUCTION AND BUILDING MATERIALS,451,16. |
| MLA | Yu, Yang,et al."Experimental study on dynamic failure behavior of red sandstone after freeze-thaw cycles".CONSTRUCTION AND BUILDING MATERIALS 451(2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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