摘要:为研究混凝土材料的动态性能，本文利用直径Ф100mm的SHPB(Split Hopkinson Pressure Bar)装置对骨料尺寸为15~20mm的混凝土材料试样进行了应变率范围30~180s-1的动态压缩试验，并借助高速摄影装置获得了试样的变形与破坏过程，结果表明：在动态压缩强度附近应力区，材料表面先出现一条沿试样轴向的可见宏观裂纹，而多条主裂纹的形成与扩展才导致材料的最终破坏；建立了改进的ZWT模型，模型预测结果与试验结果较吻合。

Abstract:In order to investigate the dynamic compressive behavior of concrete, tests on concrete, the diameters of rough aggregates used in the concrete ranged form 15mm to 20mm, were performed under compressive impact loading using SHPB( )(Split Hopkinson Pressure Bar)apparatus, and the average strain-rate in these tests ranged from 30s-1 to 180s-1，the photograph related to the deformation or failure process for concrete specimens under dynamic compressure were obtained as well. Results show that once the stresses in specimen get up to a value nearby the peak stress, a macro-crack along the axes of concrete specimen can firstly be observed on its surface, but its failure are finally related to the developing and propagating of primary multi-macro-cracks along the axes of specimen. A modified ZWT concrete constitutive model was proposed, the results predicted from it are in agreement well with those of experiments.