摘要
试验制作了一系列具有不同体积钢纤维掺量下的再生骨料混凝土试件,利用74 mm变截面分离式的霍普金森压杆(SHPB)进行了动态冲击压缩试验,研究了不同钢纤维掺量和气压值下再生骨料混凝土材料的破坏形态与模式,分析了材料的动态应变速率敏感性.结果表明,钢纤维再生混凝土的破坏形式与钢纤维体积掺量和应变速率有较高的相关性,对进一步进行深入研究具有指导意义.
A series of recycled aggregate concrete specimens with different volume contents of steel fibers were fabricated.The dynamic impact compression test was carried out by using Spilt Hopkinson Pressure Bar(SHPB)with diameter of 74 mm.The failure modes of recycled aggregate concrete material with different steel fiber content under various impact pressure were studied,and the dynamic strain rate sensitivity of the material was analyzed.The results show that the failure modes of steel fiber reinforced recycled concrete is highly correlated with the volume content of steel fibers and strain rate.These results are critical for further study.
作者
骆豪
韦芳芳
朱俞
华子伟
于玮伟
LUO Hao;WEI Fangfang;ZHU Yu;HUA Ziwei;YU Weiwei(School of Civil and Transportation Engineering,Hohai University,Nanjing 210000,China)
出处
《河南科学》
2020年第4期594-598,共5页
Henan Science
基金
国家自然科学基金青年项目(51608168)
中央高校基本科研业务费(B17020160)。
关键词
再生骨料混凝土
钢纤维掺量
冲击气压
动态应变率
破坏形式
recycled aggregate concrete
volume content of steel fiber
impact pressure
dynamic strain rate
failure modes
