Combined effect of steel fibres and steel rebars on impact resistance of high performance concrete  

作　　者：陈相宇 丁一宁 C.Azevedo 

机构地区：[1]Shanghai Bekaert Ergang Co.,Ltd [2]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology [3]Centre of Mathematics,University of Minho,Braga 4700,Portugal

出　　处：《Journal of Central South University》2011年第5期1677-1684,共8页中南大学学报（英文版）

基　　金：Project(50578026) supported by the National Natural Science Foundation of China;Project supported by FCT (SFRH/BPD/22680/2005)and Research Center of Mathematics of the University of Minho through the FCT Pluriannual Funding Program

摘　　要：The impact properties of normal concrete (NC) and reinforced concrete (RC) specimens,steel fibre reinforced concrete (SFRC) specimens and RC+SFRC specimens with different steel fibre dosages were investigated with the drop-weight impact test recommended by ACI Committee 544.The results indicate that the number of blows to final failure is greatly increased by addition of steel fibres.Moreover,the combination of steel fibres and steel rebars demonstrates a significant positive composite effect on the impact resistance,which results in the improvement in impact toughness of concrete specimens.In the view of variation of impact test results,the two-parameter Weibull distribution was adopted to analyze the experimental data.It is proved that the probabilistic distributions of the blows to first crack and to final failure of six types of samples approximately follow two-parameter Weibull distribution.The impact properties of normal concrete （NC） and reinforced concrete （RC） specimens, steel fibre reinforced concrete （SFRC） specimens and RC＋SFRC specimens with different steel fibre dosages were investigated with the drop-weight impact test recommended by ACI Committee 544. The results indicate that the number of blows to final failure is greatly increased by addition of steel fibres. Moreover, the combination of steel fibres and steel rebars demonstrates a significant positive composite effect on the impact resistance, which results in the improvement in impact toughness of concrete specimens. In the view of variation of impact test results, the two-parameter Weibull distribution was adopted to analyze the experimental data. It is proved that the probabilistic distributions of the blows to first crack and to final failure of six types of samples approximately follow two-parameter Weibull distribution.

关 键 词：impact resistance high performance concrete FIBRE Weibull distribution 

分 类 号：TU528[建筑科学—建筑技术科学]