Behavior of steel fiber–reinforced high-strength concrete at medium strain rate.pdfVIP

Front. Archit. Civ. Eng. China 2009, 3(2): 131– 136 DOI 10.1007/s11709-009-0027-0 RESEARCH ARTICLE Chujie JIAO, Wei SUN, Shi HUAN, Guoping JIANG Behavior of steel fiber–reinforced high-strength concrete at medium strain rate © Higher Education Press and Springer-Verlag 2009 Abstract Impact compression experiments for the steel 1 Introduction fiber–reinforced high-strength concrete (SFRHSC) at medium strain rate were conducted using the split The use of high-strength concrete (HSC) is becoming more Hopkinson press bar (SHPB) testing method. The volume common; however, the higher the strength of HSC, the fractions of steel fibers of SFRHSC were between 0 and higher the material brittleness. Therefore, it is important to 3%. The experimental results showed that, when the strain enhance the ductility of HSC, and one possible direction is to rate increased from threshold value to 90 s– 1, the maximum use a steel fiber–reinforced kind, called steel fiber–reinforced stress of SFRHSC increased about 30%, the elastic high-strength concrete (SFRHSC). The static behavior of modulus of SFRHSC increased about 50%, and the SFRHSC has been studied more, while its dynamic behavior increase in the peak strain of SFRHSC was 2–3 times of has been studied less. The latter is very important for proper that in the matrix specimen. The strength and toughness of design and analysis of structures to ensure that they can resist the matrix were improved remarkably because of the dynamic loads such as earthquakes, accidental impact, or superposition effect of the aggregate high-strength matrix explosions. The early experimental data on concrete under and steel fiber high-strength matrix. As a result, under impact lo