Calculation Methods Applied in the Design of Reinforced Concrete Beams.

      Аннотация: This work demonstrates the calculation of the bending from a bi-supported beam and compares the manual method versus the calculation carried out with the aid of a software based on the finite element method (FEM), both are verified based on the Brazilian standard NBR 6118 (2014). The comparison consists in the analysis of the diagrams of shearing forces, bending moments, calculated steel area and deformation in the beams. It is noticeable that in the manual calculation, it considers only the distance between the center of the supports. On the other hand, the calculation from the program (FEM) is realized by the consideration of structural dimensioning of the beam in relation to the span between the center of support pillars and the support width. Thus reaching the conclusion, that increasing the support width of the pillars, despite contributing to the reduction of shearing forces, bending moments and deformations, it’s not economically viable for this structure calculated in this work, because of the use of minimum reinforcement for the calculated cross-sectional area of the beam.

Ключевые слова: Reinforced Concrete, structural design, Finite Element Method.