A New Explanation of loading Rate Effect on Rock Compressive Strength

doi:10.1088/1755-1315/1124/1/012066

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	A New Explanation of loading Rate Effect on Rock Compressive Strength
	Zhu,Jun 2; Deng,Jianhui 1
刊名	IOP Conference Series: Earth and Environmental Science
	2023
卷号	1124 期号:1
ISSN号	1755-1307
DOI	10.1088/1755-1315/1124/1/012066
英文摘要	Abstract Apart from several qualitative descriptions, such as the delay crack propagation and the difference in energy absorption, the involved mechanism of loading rate effect (rate-dependence) on unconfined compressive strength (UCS) of rock is not clear. According to the statistical analysis of the dominant frequency of acoustic emission (AE) waveforms, this work proposed a new explanation of rate-dependence on rock UCS from a micro failure perspective. The uniaxial compression tests, coupling with AE signals monitoring, of five types of hard rocks under different loading rates were conducted. The rate-dependence on compressive strength of various rocks was investigated comprehensively. By using batch processing and Fast Fourier Transform methods, the dominant frequencies of AE waveforms associated with rock failures were extracted and analyzed to explain the rate-dependence of rock UCS. The results show that, as the loading rates increase, the UCS of most of the rocks increase, while the AE waveforms with low dominant frequency released during the entire loading process significantly decrease. Moreover, the percentage of AE waveforms with low dominant frequency has a negative correlation with the rock UCS. The micro-tensile failures can be characterized by AE waveforms with low dominant frequency and its reduction can be responsible for the increase in the UCS with increasing loading rates. The proposed explanation provides a new and reasonable perspective on the rate-dependence of rock UCS based on its intrinsic property.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:EES_1124_1_012066
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/57283]
专题	中国科学院水利部成都山地灾害与环境研究所
作者单位	1.College of Water Resources and Hydropower, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China 2.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu 610041, China
推荐引用方式 GB/T 7714	Zhu,Jun,Deng,Jianhui. A New Explanation of loading Rate Effect on Rock Compressive Strength[J]. IOP Conference Series: Earth and Environmental Science,2023,1124(1).
APA	Zhu,Jun,&Deng,Jianhui.(2023).A New Explanation of loading Rate Effect on Rock Compressive Strength.IOP Conference Series: Earth and Environmental Science,1124(1).
MLA	Zhu,Jun,et al."A New Explanation of loading Rate Effect on Rock Compressive Strength".IOP Conference Series: Earth and Environmental Science 1124.1(2023).