Abstract
Split Hopkinson pressure bar (SHPB) technique is used to determine the dynamic strength of reactive powder concretes (RPCs) with different steel-fiber contents. Two types of pulse shapers with different thicknesses are considered to reduce the high-frequency-oscillation effect and achieve a nearly constant strain rate over a certain deformation range. It is known that the compressive strength of concrete-like materials is hydrostatic-stress-dependent, and the apparent dynamic strength enhancement comes from both the effects of the hydrostatic stress and strain rate. In order to differentiate them, numerical method is used to calculate the contribution of the hydrostatic stress, and then the genuine strain-rate effect on dynamic compressive strength of RPCs is determined. In addition, the effect of steel-fibers on dynamic strength and failure mode of RPCs is discussed.
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Project supported by the National Natural Science Foundation of China (Nos.10502005 and 10872025) and the Ministry of Education of the People’s Republic of China.
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Wang, Y., Wang, Z., Liang, X. et al. Experimental and numerical studies on dynamic compressive behavior of reactive powder concretes. Acta Mech. Solida Sin. 21, 420–430 (2008). https://doi.org/10.1007/s10338-008-0851-0
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DOI: https://doi.org/10.1007/s10338-008-0851-0