Cold formed steel semi rigid joints.
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2018
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This article presents a theoretical and numerical study of an innovative joint using
cold-formed steel sections. The motivation for the study of this connection is the
ease of manufacturing and assembly that it provides. The profiles are made of coldformed
lipped channel sections, which are welded to form closed built-up sections on
the columns and open built-up lipped sections to the beams. The beams use endplates
connected by bolts (threaded bars) to the columns. The study evaluates the connection’s
initial stiffness of 19 models, where the following parameters were varied: the thickness
of the profiles and endplates, the height of the column sections and the diameter of the
bolts. A theoretical and a numerical study were developed: the numerical study was
performed using finite elements through the commercial software ANSYS, whereas
the theoretical study was made based on the component method, prescribed by Eurocode
3, that does not include the design of the connection analyzed herein. Thus,
aiming to enable the design of joints composed of cold-formed lipped channel sections,
the analysis results were compared and an adjustment coefficient, proportional to the
slenderness of the column’s plates, was proposed. The coefficient was introduced to the
stiffness component that represents the column web in compression in the mechanical
model. The ratio between the coefficients’ numerical and theoretical values presented a
maximum variation of 11%, which was considered satisfactory.
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Numerical analysis
Citação
SILVA, A. T. et al. Cold formed steel semi rigid joints. Cold formed steel semi rigid joints, Ouro Preto, v. 71, n. 4, p. 497-504, out./dez, 2018. Disponível em: <http://www.scielo.br/scielo.php?script=sci_abstract&pid=S2448-167X2018000400497&lng=en&nrm=iso>. Acesso em: 13 fev. 2019.