SOLUÇÃO DE VIGA VAGONADA, COMPARADA COM O MODELO DE TRELIÇA PLANA, NO USO DE PASSARELAS COM GRANDES VÃOS.

Resumo

Steel structures, due to the characteristics of the material, presents an efficient relation of
the resistance with its own weight, which makes it more suitable in works with needs to overcome
bigger spans. The Pavilhão com Estufa para Parque Botânico, winner of the 11th Architecture
Students Competition of the Centro Brasileiro da Construção em Aço (CBCA), stood out for its good
urban insertion and the choice of the place of implantation, which adapted well to the topography of
the land and valued the local biome, as well as presenting good use and adequate detailing of the steel
structure. According to the judging committee, the group provided good programmatic integration and
an aesthetic quality that stood out from the others. With the aim of promoting lightness and a better
interaction with the environment, a pedestrian walkway was proposed as a solution to access the set of
buildings, designed in a metallic structure with a span of 45m and a width of 10m, formed by
longitudinal wagon beams, structural model composed of a horizontal full-width element, columns and
cables. The trussed beams is another structural model used in large spans, formed by bars that join in
nodes, forming triangles. This ensures that when loads act on the nodes, only axial tensile and
compressive stresses will be developed, presenting a slimmer bar sizing and a lighter set to overcome
large gaps. In this article, we will analyze the structural model of the design of the Pavilhão com
Estufa para Parque Botânico, proposed with the use of steel wagon beams and compare with a
solution in Pratt trussed beams supported by the same actions and the weight aspect of the structure as
a function of the maximum vertical displacement defined in Annex C of ABNT NBR 8800: 2008 [2].