Investigation on Properties of Rock Joint in Compression Dynamic Test

This paper is devoted to investigate rock joint interaction with stress waves by split Hopkinson pressure bar (SHPB) during wave propagation on dynamic loading. Taking two different specimens from the intact specimen (Series N) and the joint specimen (Series J), this study focused on three aspects:...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2019, 23(9), , pp.3854-3863
Main Authors: Wu, Nan, Zhang, Cong, Maimaitiyusupu, Semaierjiang, Zhu, Zhende
Format: Article
Language:English
Subjects:
Civil Engineering
Compression
Compression tests
Deformation
Dynamic loads
Dynamic tests
Engineering
Exponential functions
Geotechnical Engineering
Geotechnical Engineering & Applied Earth Sciences
Graduate students
Impact loads
Industrial Pollution Prevention
Linear functions
Mechanical loading
Pressure
Propagation
Reflectance
Rock
Rock properties
Rocks
Split Hopkinson pressure bars
Strain gauges
Stress propagation
Stress waves
Wave propagation
Waveforms
토목공학
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Summary:This paper is devoted to investigate rock joint interaction with stress waves by split Hopkinson pressure bar (SHPB) during wave propagation on dynamic loading. Taking two different specimens from the intact specimen (Series N) and the joint specimen (Series J), this study focused on three aspects: the influence of joint specimens on waveform propagation, inversion analysis of rock joint parameters using the waveform transmission coefficient, and the influence of the joint on rock specimens. With an increase in impact air pressure, compared with the intact sample, the transmittance and reflectance of joint specimens showed the opposite change rule; the closure rate change process of rock joint was converted from an exponential function to a linear function; the peak strength of the intact specimens was higher than the joint specimens at the same impact pressure above 19.58%, 21.21%, 21.56%, and 22.68% (mean values), respectively; and the strain rates (mean value) of the intact specimens were respectively 1.61, 1.31, 1.20, and 1.09 times that of the joint specimens.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-019-1779-2