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采用空军工程大学的100分离式霍普金森压杆(SHPB)装置,对芳纶纤维材料(AFRP)包裹混凝土短柱在高应变率条件下的抗压强度进行了试验研究。研究结果表明:在高应变率下,采用AFRP加固混凝土短柱,动态抗压强度得到了显著提高,并随应变率上升而增长;相同应变率水平下,动态抗压强度随AFRP加固层数的增加呈现出先增大后减小的特性,其中两层AFRP包裹混凝土短柱增强性能最优。另外,考虑应变率效应,对Bethet强度模型进行修正,得到了适用于高应变率条件下的AFRP包裹混凝土短柱强度模型。
The compressive strength of aramid fiber material (AFRP) wrapped concrete short column under high strain rate was studied by using 100 split Hopkinson pressure bar (SHPB) device of Air Force Engineering University. The results show that under the condition of high strain rate, the dynamic compressive strength of AFRP reinforced concrete short columns is significantly increased and increases with the increase of strain rate. Under the same strain rate, the dynamic compressive strength increases with the number of AFRP reinforcement layers The increase shows the first increase and then decrease the characteristics of two AFRP concrete wrapped short columns to enhance the performance of the best. In addition, considering the strain rate effect, the Bethet strength model is modified to obtain the AFRP wrapped concrete short column strength model suitable for high strain rate conditions.