CONECTOR DE CISALHAMENTO EM PERFIL FORMADO A FRIO: ANÁLISE VIA MODELAGEM COMPUTACIONAL
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Data
2006-09-14
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Universidade Federal de Goiás
Resumo
In a composite system, a steel beam (laminated, welded or cold formed) is associated with a
concrete slab, forming a composite beam. The interaction between concrete and steel can be
mechanical, by friction or, in some cases, only by adherence. One of the major advantages of
the composite beams is the increase in strength and stiffness due to association of steel and
concrete that makes possible the reduction of the height of the structural elements, implicating
in material economy. The present research has the purpose to present a general vision of the
structural behavior of the composite steel-concrete beams and to proceed to a more detailed
study of the behavior of the shear connectors made from cold formed steel. A modeling study
of the push-out test is accomplished with the intention to find the factors that influences the
resistance and rigidity of the connection. The numerical study consists in the elaboration of a
three-dimensional numerical model to simulate the push-out test from which is obtained the
force-displacement curve, ultimate load, deformations and tensions along the connector. The
numeric results are compared with obtained experimental values of rehearsals accomplished at
laboratory for validation of the same ones. For the accomplishment of the numeric modeling
the computational program ANSYS® 6.1 was used, which uses non-linear material and
geometric Finite Element Method models. The numeric models present as variables of interest
the thickness, the height of the shear connectors made of cold formed steel and the resistance
of the concrete used in the premolded slab with reinforced concrete lattice joist. Results
showed that the thickness of the connector is the most important variable in the connection
strength, however the height of the connector also has influence in the resistance and, mainly,
in the rigidity of the connection.
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Citação
SILVA, Paulo Henrique Menezes. CONECTOR DE CISALHAMENTO EM PERFIL FORMADO A FRIO:
ANÁLISE VIA MODELAGEM COMPUTACIONAL. 2006. 185 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2006.