BARBOSA, C. V. O.; BARBOSA, Carlos Victor de Oliveira.
Abstract:
With the objective of build more complex and economical structures, the construction
sector has encouraged the development of new structural systems that are more efficient than
reinforced concrete for large constructions. One of the construction systems developed to
optimize structures is the mixed steel-concrete system, which seeks to combine the qualities of
the steel structure with the additional compressive strength of the concrete present in the slabs.
To analyze such systems with high accuracy, a very economical and quick way to perform this
structural analysis is through the numerical computer simulation among others. For such, the
present study focused on analyzing a steel-concrete composite beam with the support of Ansys
Student software, in order to evaluate the influence of the high performance concrete
collaborating slab in a partially embedded composite beam, comparing it with the results of the
isolated steel profile. Thus, the structure was modeled with the profile-Beam W 410 X 75 and
a 15 cm thick concrete slab, to obtain the principal stresses on the structure. With the simulation
of the structure, it was possible to observe that the concrete cover is able to reduce the internal
stresses in the beam from 15% to 35% and reduce the vertical displacement (deflection) up to
55%. Also, it was possible to verify that the change in concrete strength in 10 MPa generated
variations of up to 1% in stresses and deformations, becoming more expressive as the change
in concrete class is bigger. Thus, it is possible to verify that the structural model of steelconcrete
composite beams provides a better distribution of the principal stresses, when
compared to the steel structure, reducing the stress on the profile-Beam used, avoiding the use
of more expensive W-Beams, and with minors deformations on the structure.
