Abstract
In order to investigate the dynamic compressive behavior of a concrete material, tests on its specimens with rough aggregates of diameter from 15 mm to 20mm were performed under compressive impact loading using SHPB(φ100 mm) (split Hopkinson pressure bar) apparatus, and the average strain-rate in the tests was in the range of 30 s-1 to 180 s-1, the photographs related to the deformation or the failure process of the concrete specimens under dynamic compressure were obtained as well. Results showed that once the stresses in the specimens grow up to a value nearby the peak one, a macro-crack along the axes of the concrete specimens can firstly be observed on its surface, but its failure are finally related to development and expansion of the primary multi-macro-crack along the axes of the specimens; a modified ZWT concrete constitutive model is proposed, the results predicted with it are in good agreement with those of tests.
| Original language | English |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Zhendong yu Chongji/Journal of Vibration and Shock |
| Volume | 30 |
| Issue number | 5 |
| State | Published - May 2011 |
Keywords
- Concrete
- Constitutive model
- Failure mechanism
- Normalized strength
- Split Hopkinson pressure bar (SHPB)
- Strain-rate