AFRP约束混凝土动态压缩力学性能试验研究

摘要

To study dynamic compressive mechanic properties of AFRP confined concrete in the condition of high-speed impact, 0100mm Split Hopkinson Pressure Bar (SHPB) apparatus are applied to test the dynamic compressive mechanical properties of C40 concrete that is with or without confined, and the stress versus strain curves under different strain rates are gained. The results show that AFRP confined concrete has a higher dynamic compressive strength and toughness; And the linearity between the dynamic increase factor and average strain rate logarithm is appeared; The confined effect of AFRP could efficiently increase the dynamic impact mechanical properties of concrete.%为了研究AFRP(芳纶纤维增强复合材料)约束混凝土在高速冲击条件下的动态压缩力学性能,采用φ100mm分离式霍普金森压杆(SHPB)试验装置,对AFRP约束前后的C40混凝土进行动态压缩试验,得到了不同应变率条件下的应力-应变曲线.结果表明,混凝土在AFRP约束下具有更高的动态抗压强度和更好的韧性；其动力增大系数与应变率对数呈线性关系；AFRP的约束能有效地提高混凝土的抗冲击性能.