Experimental research on the evolutionary characteristics of acoustic signals for concrete cracking under uniaxial compression
文献类型：期刊论文
| 作者 | Zhao, Guofu; Luo, Danni; Su, Guoshao; Chen, Bingrui; Huang, Jinghua |
| 刊名 | APPLIED ACOUSTICS
 |
| 出版日期 | 2022-05-30 |
| 卷号 | 191 |
| 关键词 | Concrete fracturing Acoustic emission Microseismic Sound |
| ISSN号 | 0003-682X |
| 英文摘要 | In this study, the evolutionary characteristics of the acoustic emission (AE), microseismic (MS), and sound signals released during concrete fracture in terms of their amplitude, b value, activity level, and frequency spectrum were investigated. The results indicated that the b values are all characterised by a continuous decline immediately before concrete failure, accompanied by the appearance of low-frequency signals with high amplitudes. The occurrence of these two phenomena can be used as precursor information for the subsequent concrete failure. Nevertheless, there are significant differences among the three signal types. Frequency ranges of these acoustic signals and hierarchical characteristics of the concrete fracturing result in different signal activeness, which can be evidenced by the following order of the initial stress of activeness: sound (85% sigma(peak)), MS (70% sigma(peak)), and AE (57% sigma(peak)). Diversities in signal acquisitions modes lead to differences near the failure stage. A quiescent period of AE, characterized by only a few signals with low frequency and high amplitude, was observed immediately before concrete failure, whereas MS and sound were distributed in various frequency bands without quiescent periods. These differences indicated that the three types of signals have different sensitivities and applicability. A reliable concrete fracturing analysis and prediction can be achieved by the integrated usage of the three types of acoustic techniques. (C) 2022 Elsevier Ltd. All rights reserved. |
| 学科主题 | Acoustics |
| 语种 | 英语 |
| WOS记录号 | WOS:000820464800005 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34809]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guangxi University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Zhao, Guofu,Luo, Danni,Su, Guoshao,et al. Experimental research on the evolutionary characteristics of acoustic signals for concrete cracking under uniaxial compression[J]. APPLIED ACOUSTICS,2022,191. |
| APA | Zhao, Guofu,Luo, Danni,Su, Guoshao,Chen, Bingrui,&Huang, Jinghua.(2022).Experimental research on the evolutionary characteristics of acoustic signals for concrete cracking under uniaxial compression.APPLIED ACOUSTICS,191. |
| MLA | Zhao, Guofu,et al."Experimental research on the evolutionary characteristics of acoustic signals for concrete cracking under uniaxial compression".APPLIED ACOUSTICS 191(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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