A new method for measuring the adhesion strength of rock-concrete specimens based on the calibration interface of the modified flat-joint model
文献类型：期刊论文
| 作者 | Li, Xiaojing1,2,4; Lan, Lijie4; Zhang, Jianguo3; Tang, Jianhui5; Lv, Mingying4; Liu, Chengzhi4; Han, Xuerui4 |
| 刊名 | ENGINEERING FAILURE ANALYSIS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 142期号:-页码:- |
| ISSN号 | 1350-6307 |
| 关键词 | Rock -concrete interface Direct tension AE DEM Flat -joint model |
| 英文摘要 | In tunnel engineering constructed by NATM, the adhesion strength between surrounding rock and lining is an important index to measure the safety of tunnel construction. However, the field measurement and laboratory test inevitably have the problem of low efficiency. In contrast, reasonable numerical simulation can be an alternative way to study rock-concrete adhesion strength. Therefore, in this paper, the influence factors of the adhesion strength of rock-concrete are studied by direct tensile laboratory test combined with particle flow code in three-dimension (PFC3D). The flat-joint model was used to reproduce the behavior of rock and concrete. The concept of effective elastic modulus of bi-material interface was introduced to derive the modified equation of interface normal stiffness. Then the modified flat-joint model was applied to PFC3D based on the Fish language and the interface parameters were calibrated. Compared with the results of laboratory tests, it is found that this method can accurately simulate the adhesion strength between rock and concrete, which can also restore the post-peak response of laboratory tests. Therefore, more parameter studies are considered which show that: the mechanical properties of rock have little influence on the adhesion strength of composite specimens. However, the physical properties of rock, such as porosity, have great influence on that, which can be seen from the crack propagation mode at the interface of composite specimens. Sandstone cemented better with concrete will retain the rate sensitivity of rock and concrete materials to the greatest extent. When the experimental strain rate increases from 0.06 s- 1 to 0.9 s- 1, the adhesion strength of sandstone-concrete specimens increases by 50 %, while that of granite-concrete specimens hardly changes. The research results can be helpful to better understand the adhesion performance of rock-concrete interface and have certain engineering significance for tunnel construction supported by shotcrete. |
| 学科主题 | Engineering ; Materials Science |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000858456100002 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35259]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.Key Laboratory of Building Structural Retrofitting and Underground Space Engineering (Shandong Jianzhu University), Ministry of Education, Jinan 250101, China 3.Shanghai Construction Group co.ltd, Shanghai 201999, China 4.School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China 5.School of Civil Engineering and Transportation, Hohai University, Nanjing 210098, China |
| 推荐引用方式 GB/T 7714 | Li, Xiaojing,Lan, Lijie,Zhang, Jianguo,et al. A new method for measuring the adhesion strength of rock-concrete specimens based on the calibration interface of the modified flat-joint model[J]. ENGINEERING FAILURE ANALYSIS,2022,142(-):-. |
| APA | Li, Xiaojing.,Lan, Lijie.,Zhang, Jianguo.,Tang, Jianhui.,Lv, Mingying.,...&Han, Xuerui.(2022).A new method for measuring the adhesion strength of rock-concrete specimens based on the calibration interface of the modified flat-joint model.ENGINEERING FAILURE ANALYSIS,142(-),-. |
| MLA | Li, Xiaojing,et al."A new method for measuring the adhesion strength of rock-concrete specimens based on the calibration interface of the modified flat-joint model".ENGINEERING FAILURE ANALYSIS 142.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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