Nonlinear analysis of steel fiber reinforced concrete deep beams by ANSYS

Abstract EN

This paper considers the practical application of nonlinear models in the analysis of Steel Fiber Reinforced Concrete Deep Beams.

The results of some analyses performed using the reinforced concrete model of the general purpose finite element code ANSYS are presented and discussed.

Steel fiber was represented using two approaches.

In the first approaches its effect in enhancement the mechanical properties of concrete is introduced.

This was done by increasing the initial modulus of elasticity, compressive strength, tensile strength, ductility etc.

through empirical formulas found in literatures.

While the second approach was done by assuming steel fiber as smeared reinforced layers embedded in solid 65 elements.

Good agreement with the experimental test was obtained by ANSYS solution.

Numerical analysis showed that closed solutions were obtained with different representations of steel fiber in different orientations and number of layers.

This is because that the smeared layers were assumed in each element of the structure which gave a uniform distribution for the steel fiber in deep beam.

It was found that the second approaches gave better agreement with the experimental test than the first one.

Assuming of steel fiber oriented in two directions with equal ratio may consider the closer one for representation of steel fiber in two dimensional structural members.