目的活性粉末混凝土作为新型材料已广泛应用,其静态研究相对简单,研究成果比较成熟。但动态研究受到实验设备、环境、温度等各方面影响,成果参差不齐。借助SHPB实验装置研究活性粉末混凝土的动态力学性能,综述实验装置、实验原理、实验过程、数据采集及数据分析、实验结论及实验不足,以供相关研究人员参考。方法选择合适尺寸的活性粉末混凝土试件,利用SHPB压杆装置对试件进行冲击压缩实验,得到多组高应变率下入射波、反射波和透射波曲线,根据应力波理论转换为活性粉末混凝土试件的应力、应变和应变率随时间变化的关系,进而得到多组花岗岩在不同应变率下的应力、应变关系曲线。结果实验数据表明,活性粉末混凝土在高应变率下,极限强度随应变率的提高而相应增大,但不是无限增大,在应变率为87(1/s)时,极限抗压强度达到最大,为254 MPa。但继续增大时反而出现减小的趋势。这也是众多学者研究不一的地方。随着应变率的提高,材料的屈服极限强度提高,延伸率降低,屈服之后,断裂破坏应变减小。结论针对活性粉末混凝土的动态力学性能研究具有重要意义,但与以往的实验结果进行对比,发现该实验数据和结论差异性大,显然,改良了混凝土的配合比,外加钢纤维掺入,材料各方面性能会有很大的改观,但是定性分析,尤其是动态强度的定性分析与实验设备、环境材料的加工工艺都有很大关系。因此分析结论仅对本次实验有效。 The purpose of reactive powder concrete has been widely used as a new type of material, the static research is relatively simple, the research results are relatively mature. But the dynamic research is affected by the experimental equipment, environment, temperature and other aspects, the results are uneven. With the help of SHPB experimental device, the dynamic mechanical properties of reactive powder concrete were studied. The experimental device, experimental principle, experimental process, data acquisition and data analysis, experimental conclusion and experiment were reviewed for reference. Methods Specimens of activated powder concrete of suitable size were selected and subjected to impact compression test by using SHPB pressure bar device to obtain multiple sets of incident wave, reflected wave and transmission wave curve under high strain rate. According to the stress wave theory, the powder was transformed into reactive powder concrete The relationship between stress, strain and strain rate of the specimen over time is obtained, and then the stress and strain curves of multiple groups of granite under different strain rates are obtained. Results The experimental data show that the ultimate strength of reactive powder concrete at high strain rate increases correspondingly with the increase of strain rate, but it does not increase indefinitely. When the strain rate is 87 (1 / s), the ultimate compressive strength reaches the maximum At 254 MPa. But continue to increase but instead appear to decrease. This is also where many scholars study different. As the strain rate increases, the yield strength of the material increases and the elongation decreases. After yielding, the strain at fracture rupture decreases. Conclusions The research on the dynamic mechanical properties of reactive powder concrete is of great significance. However, compared with the previous experimental results, it is found that the experimental data and conclusions are quite different. Obviously, the mixing ratio of concrete, the addition of steel fiber, Performance will be greatly improved, but qualitative analysis, especially the qualitative analysis of dynamic strength and experimental equipment, environmental materials, processing technology has a great relationship. Therefore, the conclusion of the analysis is only valid for this experiment.