Estudo comparativo do comportamento estrutural de vigas utilizando simulação de elementos finitos

Abstract

In reinforced concrete buildings, beams are typically positioned so that their top face aligns with the top face of the slabs, bringing benefits such as material savings, improved load distribution, and enhanced aesthetics. This implies displacing the central axis of the beam downwards in relation to the central axis of the slabs. However, it is common in engineering offices to model beams in finite element software without considering this displacement, treating the beam axis aligned with the slab axis. In this context, this study presents an investigation into the influence of this displacement of the beam-to-slab connection axis on the determination of forces and displacements in reinforced concrete solid slabs and beams. Two finite element programs are used to assess their effectiveness and compare potential discrepancies. Additionally, a comparison is made between the results obtained and a simplified manual calculation. Before the analysis, a literature review is provided that covers definitions, material characteristics, normative criteria, and simplified methods for force determination. Finally, conclusions are drawn regarding the optimal approach for modeling a structure to obtain more accurate results and carry out effective, realistic, and cost-efficient dimensioning.