http://lattes.cnpq.br/8976814327127094; SILVA, Willian Menezes da.
Résumé:
Currently, in civil construction, more importance is given to the speed of production and
the economy in the construction process, so the precast structural elements emerge as a
response to market needs. Among them is the corbel, element in balance, on the sides of
collumns. Its production is facing problems due the need for a high reinforcement ratio
in a very short space. Thus, this study aims to evaluate the increased resistance to
cracking of the compression strut when are introduced steel fibers in different
proportions to the concrete without in comparison to the usual system. Laboratory tests
were characterized by (granulometry) and mechanics (tensile strength of steel, strength
to compression simple, testing of rupture of the models) in three models of corbel: one
without steel fibers and two others with fibers (0.5 and 1%). Finally, this study shows
the efficiency of the use of steel fibers, where varying their percentage in the matrix of
concrete, has increased the load that will cause the failure of the corbel, load that
exceeds the conventional method with splitting reinforcement, besides promoting
increments in the load of initiation of cracking and indicate an increase in ductility.
