Influence of inverted-v-braced system on the stability and strength of multi-story steel frames.
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2023
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Population growth in urban centers, together with the lack of physical space,
has led to the construction of increasingly tall and slender buildings. Multiple-story
structures present substantial challenges to civil engineering because they have specific
requirements for their design, construction, and use. The increased number of floors
leads to more lateral displacements resulting from horizontal actions. Under these
conditions, to ensure system stability, structural bracing components are commonly
adopted. In addition, along with the use of more resistant materials and new construction techniques, it is necessary to improve the methodologies adopted in the structural
analysis to offer professionals in the area the conditions to undertake safer and more
economical projects with better speed and efficiency. Thus, in this study, numerical
analyses were applied to steel planar reticulated structures to evaluate their stability
and strength when inserting bracing systems. The study compared the arrangement of
the bars and analyzed the influence of the parameters of the bracing systems, such as
the properties of the cross-section and the position of the inverted-V-braced system.
The MASTAN2 program was used to perform nonlinear static assessments using reticulated finite elements that considered both geometrical and physical nonlinearities.
It was observed that the inverted-V-braced system had a substantial impact on all of
the structures that were analyzed, providing increased stiffness and, as a result, significantly reducing the frame’s lateral displacement.
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Reticulated frame structures, Inverted-V-braced system, Numerical analysis, Finite element method, Physical nonlinearity
Citação
AZEVEDO, I. S. de; SILVA, A. R. D. das; SILVEIRA, R. A. da M. Influence of inverted-v-braced system on the stability and strength of multi-story steel frames. REM - Interrnational Engineering Journal, Ouro Preto, v. 76, p. 39-46, jan./mar. 2023. Disponível em: <https://www.scielo.br/j/remi/a/RfHgk3djyR9NwGKHd9fJf6z/>. Acesso em: 15 mar. 2023.