SILVA JÚNIOR, F. C. M.; http://lattes.cnpq.br/8569187480709594; SILVA JÚNIOR, Francisco Claudio Marques da.
Abstract:
It is known that there are currently several computer programs that carry out calculations
for reinforced concrete structures, but some design elements deserve special care, such
as stairs. Therefore, it is important to calculate it separately, building a safer model and, for
this, a method must be determined for calculating the efforts, which can be, for example,
analytical or numerical. Furthermore, it is necessary to define the type of support of the
model, as it will influence the values of internal efforts. This work aims to make a
comparative analysis of the efforts, displacements and flexural reinforcement of supported
conventional stairs, varying the stiffness of the support and the thickness of the slab. To
determine these parameters, the SAP2000 software was used to model and obtain the
efforts and displacements through shell elements, which is based on the finite element
method (FEM), which is a method of discretization of continuous elements. The
reinforcements were calculated manually using the Araújo equations (2014). It was
observed that, in general, there was an increase in bending moments and shear forces
with the increase in slab thickness, except in some specific cases, and that there were
reductions in positive moments with an increase in stiffness. As for displacements, there
was a reduction in them with the increase in the thickness of the slab and with the increase
in the stiffness of the supports, as well as in the steel areas.