Impact Behavior of Concretes Taking Account of Strain-Rate Effect, Stress-State Effect and Damage Evolution

Abstract:

At high strain rates, the dynamic response of concrete, a heterogeneous material with damage, was experimentally studied under (1) one-dimensional strain state at high pressures from 1 to 4 GPa by using a one-stage gas gun and (2) one-dimensional-stress state by using the SHPB technique. The main results are given and discussed. The results indicate that the effects of strain rate, stress-state and damage evolution should be considered in studies on the nonlinear impact behavior of concretes. A damage-modified visco-elastic model (ZWT model) is proposed for concrete C30.

• Periodical: Materials Science Forum (Volumes 638-642)
• Pages: 1071-1076
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.638-642.1071
• Online since: January 2010
• Authors: Li Li Wang, Shao Qiu Shi, Yong Gang Wang, Yong Zhong Wang
• Keywords: Concrete, Damage Evolution, High Strain Rate, Impact Behaviour, Stress State

References

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[10] [20] [30] [40] [50] [60] E D C B A Strain Rate A--175 s -1 B--142 s -1 C--127 s -1 D--52 s -1 E--38 s -1 Strain (%) Stress (MPa) 0. 0 0. 1 0. 2 0. 3.

[10] [20] [30] [40] [50] 600. 0 0. 1 0. 2 0. 3.

[10] [20] [30] [40] [50] 600. 0 0. 1 0. 2 0. 3.

[10] [20] [30] [40] [50] 600. 0 0. 1 0. 2 0. 3.

[10] [20] [30] [40] [50] [60] Fig. 9, Comparison of experimental curves with predicts (dashed lines) by Eq. (4) for C30. 0. 0 0. 1 0. 2 0. 3 0. 4.

[20] [40] [60] [80] Strain (%) Stress (MPa) D D* B B* strain rate D 52 s -1 D* 52 s -1 B 142 s -1 B* 142 s -1 Fig. 8, Comparison of experimental curves with predicts (dashed lines) by Eq. (2) for C30.