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Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters
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Qian CHEN, Yi-heng JIA, Qing-hua CHEN, Jing-wu BU, Bo XU
Water Resources and Power | 2023, 41(7) : 180 - 183
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Water Resources and Power | 2023, 41(7): 180-183
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters
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Qian CHEN, Yi-heng JIA, Qing-hua CHEN, Jing-wu BU, Bo XU
Affiliations
  • School of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
Published: 2023-07-25 doi: 10.20040/j.cnki.1000-7709.2023.20221459
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In order to study the influence of loading rate on the damage evolution of hydraulic concrete, notched cubic specimens with side lengths of 300 mm and 450 mm were tested by wedge splitting test with different loading rates of 0.1 mm/s, 0.01 mm/s, 0.001 mm/s. Acoustic emission technology was used to monitor the acoustic emission signals of concrete in the damage process. Test results show that the variation of AE event rate during failure process of concrete can be divided into quiet, active, and attenuation period, among these the active period increases with the decrease of loading rate. The damage was defined according to the AE events, and it is found that the damage process of hydraulic concrete can be divided into three stages: crack initiation, acceleration and failure. The smaller the loading rate is, the faster the growth rate of the acceleration stage is. The damage evolution model based on the AE event obeys Weibull distribution, which can better reflect the influence of loading rates on the damage evolution of hydraulic concrete.

hydraulic concrete  /  loading rate  /  acoustic emission  /  damage  /  Weibull distribution
Qian CHEN, Yi-heng JIA, Qing-hua CHEN, Jing-wu BU, Bo XU. Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters[J]. Water Resources and Power, 2023 , 41 (7) : 180 -183 . DOI: 10.20040/j.cnki.1000-7709.2023.20221459
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20221459
  • Receive Date：2022-07-15
  • Online Date：2026-01-28
  • Published：2023-07-25
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  • Received：2022-07-15
  • Revised：2022-09-14
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    School of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20221459
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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