Nonlinear analysis of high strength concrete deep beams by using finite element method

الملخص EN

In this paper, 4 high strength concrete deep beams were analyzed by nonlinear finite element method.

The variables that considered in the investigation are shear-span to depth ratio, concrete strength (86-120 MPa).

The investigation examines deep beam behavior and compares the analytical results with the ACI 318M-05 ACI318, 2005 and experimental results Stephen et.al..l996 In general, good agreement between the finite element and experimental results was obtained in this paper.

The behavior of concrete in compression was simulated by an elasto-plastic work hardening model followed by a perfect plastic response, which was terminated at the onset of crushing.

On the other hand, the behavior in tension is simulated by implementing a smeared crack model in connection with using a tension-stiffening model that account for the retained post-cracking stresses, and a shear retention model that modifies the shear modulus of rigidity as the crack widens.

Several parametric studies have been carried out to investigate the effect of some important finite element and material parameters.