The dynamic compressive properties of steel fiber reinforced concrete(SFRC)under freeze-thaw cycles were tested using a split Hopkinson compression bar device(SHPB).The effects of the number of freeze-thaw cycle(0～100 times)and the content(0,1％,2％,3％)of steel fiber on the dynamic compressive properties of SFRC were studied.The results indicate that as the number of freeze-thaw cycles increases,the dynamic compressive strength of the specimen generally decreases and the peak strain increases.With the increase of the content of steel fiber,the dynamic compressive strength of the specimen first increases and then decreases,and the peak strain shows an increasing trend.It is recommended that the optimal content of steel fiber be 2％.
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