The impact resistance of steel fiber reinforced concrete is studied.The dynamic peak compressive strain,ability to absorb en-ergy,dynamic elastic modulus growth coefficient and dynamic compressive strength growth coefficient of concrete are studied under dif-ferent strain rates and steel fiber volume content.The results show that the dynamic peak compressive strain,ability to absorb energy,dy-namic compressive strength increase coefficient and dynamic elastic modulus increase coefficient of steel fiber toughened concrete increase with the increase of strain rate.With the increase of steel fiber volume content,the dynamic compressive strength and the ability to absorb energy of concrete increase gradually,while the dynamic elastic modulus increase coefficient decreases gradually.Appropriate amount of steel fiber can improve the dynamic peak compressive strain of concrete.When the content of steel fiber is 1.5％,the dynamic peak com-pressive strain of concrete reaches the maximum value,and too much steel fiber will lead to the decrease of the peak compressive strain.The formulas of dynamic elastic modulus growth coefficient,dynamic compressive strength growth coefficient,ability to absorb energy,dynamic strain rate and volume content of steel fiber toughened concrete are established.
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