Experiment on Mechanical Properties of Steel Fiber Concrete under Dynamic Load

Abstract

Mechanical properties of steel fiber concrete under dynamic load had been obtained through dynamic loading experiments of steel fiber concrete in different volume ratios. The experimental results indicate that the dynamic load strength of steel fiber concrete is obviously more than the static load strength, the dynamic load strength increases with the increasing of the steel fiber volume ratio; and the effect of variable strain rate is obvious. When the strain is at 0 ~ 0.01 or smaller, the toughness index of plain concrete is slightly more than steel fiber concrete; the strain exceeded 0.01, the toughness of steel fiber concrete has improved greatly with the increase of the strain. When the strain rate is smaller, the elastic modulus changes little, and once the strain rate is more than 60 per second, the elastic modulus there is the more amplitude with the increase of strain rate.