Experiments on the one-dimensional spall strength of SFRC

• Published in: Construction & building materials Vol. 280; p. 122110
• Main Authors: Wang, Yuheng, Wang, Xiaofeng, Liu, Guojun, Tan, Yizhong, Zheng, Quanping, Zhao, Yushuai, Zhang, Yingying
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 19-04-2021
• Subjects: Chemical explosion; Failure mode; SHPB; Steel fiber reinforced concrete (SFRC); SHPB; Failure mode; Steel fiber reinforced concrete (SFRC); Chemical explosion
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.122110

•Ferrari 1002S2 were tested in five strain rates.•Mechanical properties were analyzed in frequency domain by using FFT transform.•The variation of phase, amplitude and power were analyzed at different frequencies.•Typical failure modes and corresponding power spectrum at different strain rates are proposed.•Both energy absorption capacity and failure mode have strain rate effect.
In this paper, the influence of concrete strength, aggregate size and steel fiber content on spalling strength of concrete is studied by means of split Hopkinson pressure bar test system and chemical explosion test. The typical failure mode and dynamic parameters of steel fiber reinforced concrete are analyzed. The range of strain rate of concrete (steel fiber reinforced concrete) response law is widened. The test results show that the steel fiber reinforced concrete has a good effect on the spalling strength of concrete When the fiber content is increased by 1%, the spalling strength of concrete increases by about 2 times, and the effect of loading strain rate on spalling strength of concrete is approximately linear.