钢纤维活性粉末混凝土SHPB试验研究  

SHPB experiment of steel fiber reactive powder concrete

作　　者：郏晨[1] 焦楚杰[1] 张亚芳[1] 高乐[1] 雷传章[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2013年第2期56-60,共5页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51278135;50708022);广东省高等学校高层次人才资助项目(2050205);广东省自然科学基金资助项目(06301038);建设部科研开发资助项目(06-K1-37;07-K4-5;07-K4-13;10-K3-27;10-K4-18);广州市属高校"羊城学者"科研资助项目(10A043G)

摘　　要：采用SHPB装置对钢纤维活性粉末混凝土(SFRPC)试件进行应变率为10.s-1～120.s-1范围内的冲击压缩试验.试验结果表明:随着钢纤维掺量(Vf)的增加,SFRPC材料在冲击荷载作用下的动态抗压强度升高,而韧性则提高尤为显著.同时发现SFRPC具有明显的应变率硬化效应,并得出了SFRPC的应变率敏感阈值.The dynamic compression mechanical properties of SFRPC were studied by the split Hopkinson press bar testing method with the strain rates of 10·s^-1 - 10·s^-1. The experimental results show that the dynamic compressive strength of SFRPC increases as the steel fiber volume fractions increase under the impact loading, and the toughness increase is particularly significant. Furthermore, it is found that SFRPC has a significant effect of strain-rate hardening, and the strain-rate sensitivity threshold value are obtained from the experimental data.

关 键 词：钢纤维活性粉末混凝土 冲击 压缩 分离式霍普金森压杆 

分 类 号：TU528.572[建筑科学—建筑技术科学]