Analysis of the dynamic compressive test of high strength concrete

GAO Guangfa; GUO Yangbo

doi:10.11883/bzycj-2017-0405

Volume 39 Issue 3

Mar. 2019

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GAO Guangfa, GUO Yangbo. Analysis of the dynamic compressive test of high strength concrete[J]. Explosion And Shock Waves, 2019, 39(3): 033103. doi: 10.11883/bzycj-2017-0405

Citation:

GAO Guangfa, GUO Yangbo. Analysis of the dynamic compressive test of high strength concrete[J]. Explosion And Shock Waves, 2019, 39(3): 033103. doi: 10.11883/bzycj-2017-0405

GAO Guangfa, GUO Yangbo. Analysis of the dynamic compressive test of high strength concrete[J]. Explosion And Shock Waves, 2019, 39(3): 033103. doi: 10.11883/bzycj-2017-0405

Citation:

GAO Guangfa, GUO Yangbo. Analysis of the dynamic compressive test of high strength concrete[J]. Explosion And Shock Waves, 2019, 39(3): 033103. doi: 10.11883/bzycj-2017-0405

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Analysis of the dynamic compressive test of high strength concrete

doi: 10.11883/bzycj-2017-0405

GAO Guangfa^1
,,
GUO Yangbo²

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Impact Mechanics Laboratory, National University of Singapore, 117576, Singapore

Received Date: 2017-11-07
Rev Recd Date: 2018-06-21

Available Online: 2019-03-25

Publish Date: 2019-03-01

Abstract

Abstract

Accurate measurement of the dynamic compressive performance of concrete and its strain rate enhancement effect is a key point in impact dynamics research. In this study, aiming at the dynamic compressive behavior test of concrete C110, we examined the stress uniformity, constant loading strain rate and interface contact in the large-size Split Hopkinson Pressure Bar test and found that the upper-limit strain rate in consideration of the stress uniformity hypothesis was less than 166 s⁻¹ for the concrete specimens in this test and that, owing to the imperfect contact of the interface between the rod and the end surface of the specimen, the experimental young modulus and yield strength were obviously smaller than the actual value. Then we developed the five-step test method and prestress method, by which the approximate constant strain rate loading was realized using the combined pulse shaping technology. Using the above technologies the dynamic and static stress-strain curves the concrete C110 were presented. The results showed that the strain-rate effect of the young's modulus of the concrete C110 was not observed and the yield strengths of the uniaxial compression were linearly proportionate to the logarithmic strain rates, with the experimental strain-rate enhancement factor to be 0.10, and that the concrete-like pressure-sensitive material should be calibrated using the yield criteria. In this research, the strain-rate enhancement factor of the concrete material, respectively, were calibrated using the Tresca yield criterion and the K&C yield criterion, and then the strain-rate enhancement factor of the concrete material were found to be 0.015 and 0.038 respectively.
- SHPB,
- strain rate effect,
- concrete,
- combined pulse shapers,
- interface contact,
- stress uniformity

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References(28)

References

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