A crack-shear slip model of high-strength steel fiber-reinforced concrete based on a push-off test

- Crack-shear slip model of high-strength steel fiber-reinforced concrete is proposed.
- Good agreement between the model and experimental results was observed.
- Direction of concrete flow and stirrups shows combined effect on shear strength.

This paper presents the shear behavior and a crack-shear slip model of high-strength steel fiber-reinforced concrete based on a push-off test. The parameters were the compressive strength of the concrete, steel fiber volume fraction, stirrup ratios, angle between the shear plane-flow direction in shear flow and angle between the shear plane-stirrups. The test results indicated that the shear strength increased by approximately 1.5-2 times due to the presence of steel fibers and the ductility effectively increased when using steel fibers and stirrups. The angle of the shear plane-flow direction in shear flow and the angle of the shear plane-stirrups significantly affected the shear strength. In this paper, a crack-shear slip model for high-strength steel fiber-reinforced concrete is proposed using the tri-linear relationship. The results calculated from the model corresponded with the test results.