Nonlinear analysis of reinforced concrete slabs through the finite element method

One of the significant difficulties in representing behavior reinforced concrete structures mathematical models is post-cracking non-linearity. And so, slabs are no exception to rule. Still, usual analysis for this structural element verified elastic regime when tensile strength considered. This model acceptable service limit states but not ultimate state. These aspects associated with great difference subjected tension or compression make it necessary study a nonlinear that can represent slab bending, from beginning loading until its failure, as accurately possible. With this, ANSYS software, version 18, made available library Drucker-Prager-Rankine arranged two distinct rupture surfaces. A Drucker-Prager criterion and Rankine tension. In addition, software based on finite method, giving possibility precise through load deformation increments, taking into account both plastic deformations after cracking. Thus, work aims present modeling surface, validating by comparing several experimental tests. The results were coherent acceptable, presenting good approximation