A study on using acoustic emission in rock slope with difficult ground — focused on rainfall

Byun, Yoseph; Kim, Suk-Chun; Chun, Byung-Sik; Park, Seong-Yong; Jung, Hyuk-Sang

doi:10.1007/s12303-012-0035-2

Cited by 18 publications

(8 citation statements)

References 16 publications

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“…The ratio of AE events to AE energy is "r," which reflected the concentration of internal energy during the loading process of the specimen. 47,48 The increase of the "r" value indicated that there were many low-energy events in the specimen, reflecting the propagation and extension of the internal cracks. The decrease of the "r" value indicated that there was a high-energy AE hit inside the specimen, but the number of AE events was small; that is, the macroscopic rupture stage is induced.…”

Section: Crack Classification Statisticsmentioning

confidence: 99%

Quantitative statistical analysis of the crack propagation and fracture process of self‐compacting rubber concrete based on acoustic emission

Ming

Lü

Liu

et al. 2021

Struct Control Health Monit

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In this study, acoustic emission (AE) was used to monitor the whole process of tensile and fracture of the self-compacting rubber concrete (SCRC) under fourpoint bending. The AE activities of SCRC during the stretching and fracture process were analyzed by statistical methods to correlate the process of crack propagation with changes in mechanical properties. And by comparing the tensile and fracture properties, the change patterns of crack mode, the cumulative events and energy of AE in the bending process of SCRC with different rubber particles content, the influence of the incorporated rubber particles on the propagation of microcracks, and the macroscopic fracture mechanism were analyzed. Studies showed that with the incorporation of rubber particles, the ductility of the concrete before and after cracking was improved. Due to the weak bonding surface between the rubber particles and the matrix, the microcracks began to propagate at low-stress levels and developed steadily throughout the stretching process. As the rubber content increased, more rubber components participated in the tensile and fracture process. Because of the elastic stretching of rubber particles, the tensile deformation capacity and fracture properties of the concrete have been improved. And in the whole process of tensile and fracture, the cracking of the weak cemented surface of the matrix and the pulling of the rubber particles were more likely to cause shear mode cracks. K E Y W O R D Sacoustic emission, crack classification statistics, crack development, self-compacting rubber concrete, tensile and fracture property | INTRODUCTIONEvery year, millions of tires are discarded all over the world. It's not easily biodegradable, and the resulting "black pollution" will cause great harm to human health and the environment. 1 Concrete is a quasi-brittle multiphase material, and rubber is an elastic material. Processing waste tires into crushed rubber is added to concrete to produce rubber concrete, which not only reduces the use of aggregates but also solves the problem of rubber pollution. And compared with conventional concrete, the incorporation of rubber can improve the concrete ductility, 2 frost resistance, 3,4 energy absorption capacity, 5 and seismic performance. 6 However, crushed rubber is different from traditional rigid aggregates.

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Section: Crack Classification Statisticsmentioning

confidence: 99%

Quantitative statistical analysis of the crack propagation and fracture process of self‐compacting rubber concrete based on acoustic emission

Ming

Lü

Liu

et al. 2021

Struct Control Health Monit

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“…high-speed camera [12,13]. The AE characteristics during the loading process of coal or rock in different loaded ways were studied [14,15].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the tensile properties of weakly cemented sandstone in China Shendong Mining Area

Zhi-hu

Liu

et al. 2020

Therm sci

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To investigate the tensile properties of weakly cemented rock samples at Shendong Mining Area. Four common weakly cemented rocks are subjected to Brazilian Splitting Test, and both the acoustic emission signals and deformation field are monitored simultaneously. Thus, deformation and acoustic emission features were analyzed in different rock samples. Moreover, the relationship between the evolution of localization belt and acoustic emission features was identified. The results show that the samples displayed similar deformation features and that the evolution of R value is also basically consistent.

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“…The results show that the cumulative AE curve agrees well with the strain curve and can reflect the fatigue damage process of a rock mass. AE technology has been widely used in engineering practice, such as for monitoring the damage degree of the surrounding rock during tunneling, 33 monitoring the rock slope damage caused by rainfall, 34 the treatment of radioactive waste, 35 detecting the disturbance zone in tunnel excavation, 36 and evaluating the stability of mining pillars. 37 In summary, the accuracy of AE for detecting rock and engineering damage is accepted, but few articles exist on the engineering damage detection of anchorage supports.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of pretensioned bolts under cyclic loading: Damage assessment using acoustic emission

Zheng

Zhu

et al. 2019

International Journal of Distributed Sensor Networks

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Understanding the acoustic emission effects on bolts under cyclic loading is of great significance for the support of roadways. The presented research focuses on the acoustic emission characteristics of bolts under cyclic loading. The following main conclusions were drawn: (1) With a higher loading frequency, the acoustic emission counts rate increases, while the total energy released in a given cyclic loading path decreases. (2) A fitting formula is established according to the relationship between the tension amplitude and cumulative acoustic emission counts, which can analyze the tension magnitude level of the cyclic load. (3) A damage factor for a cyclic load is proposed based on the acoustic emission counts generated during the cyclic and monotonic loading process that can analyze the degree of damage to the anchorage system caused by the cyclic load. (4) Based on the spatial distribution of the acoustic emission orientation points and the acoustic emission energy generated during the pull-out process, the acoustic emission damage evolution process of the anchorage specimens is deduced, and the mechanism of the high stability of the pretension anchorage system after cyclic loading is analyzed. The above conclusions may provide some experimental references for the application of acoustic emission technology in bolts supporting roadways.

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A study on using acoustic emission in rock slope with difficult ground — focused on rainfall

Cited by 18 publications

References 16 publications

Quantitative statistical analysis of the crack propagation and fracture process of self‐compacting rubber concrete based on acoustic emission

Quantitative statistical analysis of the crack propagation and fracture process of self‐compacting rubber concrete based on acoustic emission

Experimental investigation on the tensile properties of weakly cemented sandstone in China Shendong Mining Area

Experimental investigation of pretensioned bolts under cyclic loading: Damage assessment using acoustic emission

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